./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--gl620a.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--gl620a.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta --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 ef92dd0c18fa389aa454198685fbcc052698924a127f9f39b737e9548a23680b --- 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-dbf71c6-m [2022-10-17 17:38:02,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:38:02,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:38:02,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:38:02,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:38:02,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:38:02,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:38:02,179 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:38:02,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:38:02,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:38:02,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:38:02,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:38:02,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:38:02,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:38:02,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:38:02,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:38:02,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:38:02,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:38:02,205 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:38:02,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:38:02,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:38:02,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:38:02,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:38:02,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:38:02,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:38:02,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:38:02,231 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:38:02,233 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:38:02,234 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:38:02,235 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:38:02,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:38:02,237 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:38:02,240 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:38:02,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:38:02,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:38:02,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:38:02,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:38:02,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:38:02,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:38:02,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:38:02,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:38:02,247 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-10-17 17:38:02,289 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:38:02,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:38:02,290 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:38:02,290 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:38:02,291 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:38:02,291 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:38:02,291 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:38:02,292 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:38:02,292 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:38:02,292 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:38:02,293 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:38:02,293 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:38:02,293 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:38:02,294 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:38:02,294 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:38:02,294 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:38:02,295 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:38:02,295 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:38:02,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:38:02,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:38:02,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:38:02,297 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:38:02,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:38:02,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:38:02,310 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:38:02,310 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:38:02,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:38:02,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:38:02,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:38:02,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:38:02,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:38:02,312 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:38:02,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:38:02,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:38:02,313 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:38:02,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:38:02,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:38:02,314 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:38:02,314 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_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef92dd0c18fa389aa454198685fbcc052698924a127f9f39b737e9548a23680b [2022-10-17 17:38:02,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:38:02,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:38:02,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:38:02,613 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:38:02,614 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:38:02,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--gl620a.ko-entry_point.cil.out.i [2022-10-17 17:38:02,698 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta/data/468cca9fe/6ed3f666f3bc4c559bc51ae5a445d6ae/FLAG328b2c330 [2022-10-17 17:38:03,424 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:38:03,425 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--gl620a.ko-entry_point.cil.out.i [2022-10-17 17:38:03,457 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta/data/468cca9fe/6ed3f666f3bc4c559bc51ae5a445d6ae/FLAG328b2c330 [2022-10-17 17:38:03,537 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta/data/468cca9fe/6ed3f666f3bc4c559bc51ae5a445d6ae [2022-10-17 17:38:03,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:38:03,542 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:38:03,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:38:03,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:38:03,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:38:03,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:38:03" (1/1) ... [2022-10-17 17:38:03,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a42798c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:03, skipping insertion in model container [2022-10-17 17:38:03,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:38:03" (1/1) ... [2022-10-17 17:38:03,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:38:03,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:38:04,562 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--gl620a.ko-entry_point.cil.out.i[160969,160982] [2022-10-17 17:38:04,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:38:04,913 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:38:05,118 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--gl620a.ko-entry_point.cil.out.i[160969,160982] [2022-10-17 17:38:05,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:38:05,265 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:38:05,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:05 WrapperNode [2022-10-17 17:38:05,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:38:05,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:38:05,267 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:38:05,267 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:38:05,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:05" (1/1) ... [2022-10-17 17:38:05,338 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:05" (1/1) ... [2022-10-17 17:38:05,389 INFO L138 Inliner]: procedures = 101, calls = 368, calls flagged for inlining = 41, calls inlined = 38, statements flattened = 961 [2022-10-17 17:38:05,389 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:38:05,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:38:05,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:38:05,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:38:05,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:05" (1/1) ... [2022-10-17 17:38:05,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:05" (1/1) ... [2022-10-17 17:38:05,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:05" (1/1) ... [2022-10-17 17:38:05,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:05" (1/1) ... [2022-10-17 17:38:05,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:05" (1/1) ... [2022-10-17 17:38:05,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:05" (1/1) ... [2022-10-17 17:38:05,513 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:05" (1/1) ... [2022-10-17 17:38:05,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:05" (1/1) ... [2022-10-17 17:38:05,529 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:38:05,530 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:38:05,530 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:38:05,530 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:38:05,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:05" (1/1) ... [2022-10-17 17:38:05,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:38:05,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:05,564 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:38:05,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:38:05,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-10-17 17:38:05,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-10-17 17:38:05,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-10-17 17:38:05,614 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-10-17 17:38:05,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-10-17 17:38:05,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:38:05,614 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_disconnect [2022-10-17 17:38:05,614 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_disconnect [2022-10-17 17:38:05,615 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-10-17 17:38:05,615 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-10-17 17:38:05,615 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-10-17 17:38:05,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-10-17 17:38:05,615 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2022-10-17 17:38:05,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2022-10-17 17:38:05,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:38:05,616 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-10-17 17:38:05,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-10-17 17:38:05,616 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2022-10-17 17:38:05,616 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2022-10-17 17:38:05,616 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-10-17 17:38:05,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-10-17 17:38:05,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-10-17 17:38:05,617 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-10-17 17:38:05,617 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 17:38:05,617 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 17:38:05,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:38:05,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:38:05,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:38:05,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:38:05,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:38:05,618 INFO L130 BoogieDeclarations]: Found specification of procedure genelink_tx_fixup [2022-10-17 17:38:05,618 INFO L138 BoogieDeclarations]: Found implementation of procedure genelink_tx_fixup [2022-10-17 17:38:05,619 INFO L130 BoogieDeclarations]: Found specification of procedure genelink_rx_fixup [2022-10-17 17:38:05,619 INFO L138 BoogieDeclarations]: Found implementation of procedure genelink_rx_fixup [2022-10-17 17:38:05,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:38:05,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:38:05,619 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2022-10-17 17:38:05,619 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2022-10-17 17:38:05,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:38:05,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-10-17 17:38:05,620 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-10-17 17:38:05,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-10-17 17:38:05,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:38:05,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:38:06,037 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:38:06,041 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:38:06,219 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-10-17 17:38:08,497 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:38:08,792 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:38:08,793 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 17:38:08,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:38:08 BoogieIcfgContainer [2022-10-17 17:38:08,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:38:08,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:38:08,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:38:08,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:38:08,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:38:03" (1/3) ... [2022-10-17 17:38:08,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a44d931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:38:08, skipping insertion in model container [2022-10-17 17:38:08,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:05" (2/3) ... [2022-10-17 17:38:08,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a44d931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:38:08, skipping insertion in model container [2022-10-17 17:38:08,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:38:08" (3/3) ... [2022-10-17 17:38:08,808 INFO L112 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--gl620a.ko-entry_point.cil.out.i [2022-10-17 17:38:08,829 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:38:08,829 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:38:08,901 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:38:08,908 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;@5b347feb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:38:08,908 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:38:08,913 INFO L276 IsEmpty]: Start isEmpty. Operand has 170 states, 119 states have (on average 1.4705882352941178) internal successors, (175), 125 states have internal predecessors, (175), 36 states have call successors, (36), 14 states have call predecessors, (36), 13 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-10-17 17:38:08,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-17 17:38:08,927 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:08,928 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:08,929 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:08,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:08,935 INFO L85 PathProgramCache]: Analyzing trace with hash 188955179, now seen corresponding path program 1 times [2022-10-17 17:38:08,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:08,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979110290] [2022-10-17 17:38:08,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:08,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 17:38:09,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:09,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979110290] [2022-10-17 17:38:09,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979110290] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:09,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:09,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:38:09,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222775482] [2022-10-17 17:38:09,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:09,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:38:09,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:09,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:38:09,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:09,691 INFO L87 Difference]: Start difference. First operand has 170 states, 119 states have (on average 1.4705882352941178) internal successors, (175), 125 states have internal predecessors, (175), 36 states have call successors, (36), 14 states have call predecessors, (36), 13 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 17:38:11,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:11,447 INFO L93 Difference]: Finished difference Result 470 states and 684 transitions. [2022-10-17 17:38:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:38:11,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-10-17 17:38:11,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:11,477 INFO L225 Difference]: With dead ends: 470 [2022-10-17 17:38:11,478 INFO L226 Difference]: Without dead ends: 300 [2022-10-17 17:38:11,490 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 [2022-10-17 17:38:11,499 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 202 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:11,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 429 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-10-17 17:38:11,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-10-17 17:38:11,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2022-10-17 17:38:11,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 220 states have (on average 1.4227272727272726) internal successors, (313), 220 states have internal predecessors, (313), 56 states have call successors, (56), 24 states have call predecessors, (56), 23 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-10-17 17:38:11,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 424 transitions. [2022-10-17 17:38:11,605 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 424 transitions. Word has length 33 [2022-10-17 17:38:11,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:11,606 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 424 transitions. [2022-10-17 17:38:11,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 17:38:11,607 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 424 transitions. [2022-10-17 17:38:11,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-10-17 17:38:11,622 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:11,622 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-10-17 17:38:11,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:38:11,623 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:11,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:11,624 INFO L85 PathProgramCache]: Analyzing trace with hash -302558757, now seen corresponding path program 1 times [2022-10-17 17:38:11,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:11,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52876946] [2022-10-17 17:38:11,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:11,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:12,090 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 17:38:12,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:12,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52876946] [2022-10-17 17:38:12,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52876946] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:12,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:12,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:38:12,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972344377] [2022-10-17 17:38:12,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:12,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:38:12,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:12,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:38:12,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:38:12,097 INFO L87 Difference]: Start difference. First operand 300 states and 424 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:38:13,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:13,861 INFO L93 Difference]: Finished difference Result 588 states and 838 transitions. [2022-10-17 17:38:13,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:38:13,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2022-10-17 17:38:13,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:13,870 INFO L225 Difference]: With dead ends: 588 [2022-10-17 17:38:13,871 INFO L226 Difference]: Without dead ends: 583 [2022-10-17 17:38:13,872 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 [2022-10-17 17:38:13,873 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 208 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:13,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 640 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-10-17 17:38:13,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-10-17 17:38:13,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 581. [2022-10-17 17:38:13,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 428 states have (on average 1.425233644859813) internal successors, (610), 428 states have internal predecessors, (610), 107 states have call successors, (107), 46 states have call predecessors, (107), 45 states have return successors, (112), 106 states have call predecessors, (112), 106 states have call successors, (112) [2022-10-17 17:38:13,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 829 transitions. [2022-10-17 17:38:13,927 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 829 transitions. Word has length 42 [2022-10-17 17:38:13,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:13,928 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 829 transitions. [2022-10-17 17:38:13,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:38:13,929 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 829 transitions. [2022-10-17 17:38:13,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-10-17 17:38:13,936 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:13,937 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:13,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:38:13,937 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:13,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:13,938 INFO L85 PathProgramCache]: Analyzing trace with hash -465428346, now seen corresponding path program 1 times [2022-10-17 17:38:13,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:13,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911450045] [2022-10-17 17:38:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:13,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-10-17 17:38:14,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:14,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911450045] [2022-10-17 17:38:14,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911450045] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:14,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:14,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:38:14,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966976650] [2022-10-17 17:38:14,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:14,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:38:14,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:14,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:38:14,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:14,176 INFO L87 Difference]: Start difference. First operand 581 states and 829 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-10-17 17:38:16,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:38:16,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:16,415 INFO L93 Difference]: Finished difference Result 1307 states and 1868 transitions. [2022-10-17 17:38:16,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:38:16,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 105 [2022-10-17 17:38:16,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:16,422 INFO L225 Difference]: With dead ends: 1307 [2022-10-17 17:38:16,422 INFO L226 Difference]: Without dead ends: 738 [2022-10-17 17:38:16,424 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 [2022-10-17 17:38:16,426 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 75 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:16,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 371 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-10-17 17:38:16,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2022-10-17 17:38:16,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 733. [2022-10-17 17:38:16,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 557 states have (on average 1.4398563734290843) internal successors, (802), 557 states have internal predecessors, (802), 120 states have call successors, (120), 56 states have call predecessors, (120), 55 states have return successors, (125), 119 states have call predecessors, (125), 119 states have call successors, (125) [2022-10-17 17:38:16,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1047 transitions. [2022-10-17 17:38:16,479 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1047 transitions. Word has length 105 [2022-10-17 17:38:16,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:16,480 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 1047 transitions. [2022-10-17 17:38:16,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-10-17 17:38:16,481 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1047 transitions. [2022-10-17 17:38:16,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-10-17 17:38:16,487 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:16,487 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:16,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:38:16,488 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:16,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:16,489 INFO L85 PathProgramCache]: Analyzing trace with hash 521041396, now seen corresponding path program 1 times [2022-10-17 17:38:16,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:16,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868343471] [2022-10-17 17:38:16,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:16,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:16,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-10-17 17:38:16,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:16,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868343471] [2022-10-17 17:38:16,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868343471] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:16,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:16,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:38:16,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685138203] [2022-10-17 17:38:16,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:16,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:38:16,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:16,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:38:16,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:16,854 INFO L87 Difference]: Start difference. First operand 733 states and 1047 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-10-17 17:38:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:18,121 INFO L93 Difference]: Finished difference Result 1949 states and 2788 transitions. [2022-10-17 17:38:18,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:38:18,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 123 [2022-10-17 17:38:18,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:18,132 INFO L225 Difference]: With dead ends: 1949 [2022-10-17 17:38:18,132 INFO L226 Difference]: Without dead ends: 1236 [2022-10-17 17:38:18,136 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 [2022-10-17 17:38:18,137 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 185 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:18,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 446 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-10-17 17:38:18,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-10-17 17:38:18,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1231. [2022-10-17 17:38:18,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 941 states have (on average 1.4261424017003188) internal successors, (1342), 941 states have internal predecessors, (1342), 194 states have call successors, (194), 96 states have call predecessors, (194), 95 states have return successors, (201), 193 states have call predecessors, (201), 193 states have call successors, (201) [2022-10-17 17:38:18,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1737 transitions. [2022-10-17 17:38:18,229 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1737 transitions. Word has length 123 [2022-10-17 17:38:18,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:18,230 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 1737 transitions. [2022-10-17 17:38:18,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-10-17 17:38:18,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1737 transitions. [2022-10-17 17:38:18,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-10-17 17:38:18,236 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:18,236 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:18,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:38:18,237 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:18,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:18,237 INFO L85 PathProgramCache]: Analyzing trace with hash -166544316, now seen corresponding path program 1 times [2022-10-17 17:38:18,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:18,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456907675] [2022-10-17 17:38:18,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:18,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-10-17 17:38:18,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:18,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456907675] [2022-10-17 17:38:18,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456907675] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:18,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:18,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:38:18,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664098635] [2022-10-17 17:38:18,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:18,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:38:18,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:18,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:38:18,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:38:18,829 INFO L87 Difference]: Start difference. First operand 1231 states and 1737 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-10-17 17:38:20,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:20,788 INFO L93 Difference]: Finished difference Result 2496 states and 3545 transitions. [2022-10-17 17:38:20,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:38:20,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 123 [2022-10-17 17:38:20,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:20,798 INFO L225 Difference]: With dead ends: 2496 [2022-10-17 17:38:20,805 INFO L226 Difference]: Without dead ends: 1285 [2022-10-17 17:38:20,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:38:20,810 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 2 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:20,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 765 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-10-17 17:38:20,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2022-10-17 17:38:20,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1271. [2022-10-17 17:38:20,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1271 states, 969 states have (on average 1.413828689370485) internal successors, (1370), 973 states have internal predecessors, (1370), 194 states have call successors, (194), 96 states have call predecessors, (194), 107 states have return successors, (221), 201 states have call predecessors, (221), 193 states have call successors, (221) [2022-10-17 17:38:20,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1785 transitions. [2022-10-17 17:38:20,892 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1785 transitions. Word has length 123 [2022-10-17 17:38:20,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:20,893 INFO L495 AbstractCegarLoop]: Abstraction has 1271 states and 1785 transitions. [2022-10-17 17:38:20,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-10-17 17:38:20,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1785 transitions. [2022-10-17 17:38:20,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-10-17 17:38:20,899 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:20,899 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:20,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:38:20,899 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:20,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:20,900 INFO L85 PathProgramCache]: Analyzing trace with hash 490213178, now seen corresponding path program 1 times [2022-10-17 17:38:20,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:20,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627443034] [2022-10-17 17:38:20,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:20,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-10-17 17:38:21,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:21,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627443034] [2022-10-17 17:38:21,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627443034] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:21,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:21,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 17:38:21,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738918928] [2022-10-17 17:38:21,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:21,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 17:38:21,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:21,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 17:38:21,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:38:21,588 INFO L87 Difference]: Start difference. First operand 1271 states and 1785 transitions. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 7 states have internal predecessors, (72), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2022-10-17 17:38:22,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:38:27,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:38:28,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:28,936 INFO L93 Difference]: Finished difference Result 2728 states and 3881 transitions. [2022-10-17 17:38:28,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:38:28,937 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 7 states have internal predecessors, (72), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) Word has length 127 [2022-10-17 17:38:28,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:28,962 INFO L225 Difference]: With dead ends: 2728 [2022-10-17 17:38:28,963 INFO L226 Difference]: Without dead ends: 1477 [2022-10-17 17:38:28,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:38:28,972 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 28 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1752 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:28,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1752 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-10-17 17:38:28,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2022-10-17 17:38:29,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 1295. [2022-10-17 17:38:29,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 989 states have (on average 1.39737108190091) internal successors, (1382), 989 states have internal predecessors, (1382), 194 states have call successors, (194), 96 states have call predecessors, (194), 111 states have return successors, (225), 209 states have call predecessors, (225), 193 states have call successors, (225) [2022-10-17 17:38:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1801 transitions. [2022-10-17 17:38:29,102 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1801 transitions. Word has length 127 [2022-10-17 17:38:29,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:29,103 INFO L495 AbstractCegarLoop]: Abstraction has 1295 states and 1801 transitions. [2022-10-17 17:38:29,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 7 states have internal predecessors, (72), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2022-10-17 17:38:29,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1801 transitions. [2022-10-17 17:38:29,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-10-17 17:38:29,109 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:29,109 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:29,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:38:29,110 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:29,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:29,111 INFO L85 PathProgramCache]: Analyzing trace with hash -794174829, now seen corresponding path program 1 times [2022-10-17 17:38:29,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:29,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122876087] [2022-10-17 17:38:29,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:29,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-10-17 17:38:29,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:29,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122876087] [2022-10-17 17:38:29,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122876087] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:38:29,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898395904] [2022-10-17 17:38:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:29,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:29,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:29,928 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:29,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:38:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:30,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 1517 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 17:38:30,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-10-17 17:38:30,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:38:30,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898395904] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:30,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:38:30,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-10-17 17:38:30,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063689340] [2022-10-17 17:38:30,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:30,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:38:30,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:30,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:38:30,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:38:30,666 INFO L87 Difference]: Start difference. First operand 1295 states and 1801 transitions. Second operand has 4 states, 3 states have (on average 24.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-10-17 17:38:32,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:38:33,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:33,112 INFO L93 Difference]: Finished difference Result 2578 states and 3589 transitions. [2022-10-17 17:38:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:38:33,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 24.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 133 [2022-10-17 17:38:33,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:33,126 INFO L225 Difference]: With dead ends: 2578 [2022-10-17 17:38:33,126 INFO L226 Difference]: Without dead ends: 1296 [2022-10-17 17:38:33,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:38:33,133 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 1 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:33,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 582 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-10-17 17:38:33,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2022-10-17 17:38:33,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1296. [2022-10-17 17:38:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 990 states have (on average 1.396969696969697) internal successors, (1383), 990 states have internal predecessors, (1383), 194 states have call successors, (194), 96 states have call predecessors, (194), 111 states have return successors, (225), 209 states have call predecessors, (225), 193 states have call successors, (225) [2022-10-17 17:38:33,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1802 transitions. [2022-10-17 17:38:33,229 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1802 transitions. Word has length 133 [2022-10-17 17:38:33,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:33,229 INFO L495 AbstractCegarLoop]: Abstraction has 1296 states and 1802 transitions. [2022-10-17 17:38:33,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 24.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-10-17 17:38:33,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1802 transitions. [2022-10-17 17:38:33,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-10-17 17:38:33,235 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:33,235 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:33,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:33,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:33,462 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:33,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:33,463 INFO L85 PathProgramCache]: Analyzing trace with hash 538729131, now seen corresponding path program 1 times [2022-10-17 17:38:33,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:33,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433847186] [2022-10-17 17:38:33,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:33,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-10-17 17:38:34,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:34,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433847186] [2022-10-17 17:38:34,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433847186] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:38:34,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601105442] [2022-10-17 17:38:34,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:34,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:34,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:34,270 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:34,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951b6386-2fb5-44c5-a219-ae5fb8461601/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:38:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:34,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 1547 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 17:38:34,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-10-17 17:38:35,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-10-17 17:38:35,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601105442] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:38:35,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [408568796] [2022-10-17 17:38:35,298 INFO L159 IcfgInterpreter]: Started Sifa with 89 locations of interest [2022-10-17 17:38:35,299 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:38:35,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:38:35,310 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:38:35,310 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:38:36,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 368 treesize of output 320