./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 2259272f0273dfac0cad582092d6645e308d8387476548b6016b816b129472dc --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:57:02,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:57:02,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:57:02,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:57:02,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:57:02,243 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:57:02,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:57:02,247 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:57:02,248 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:57:02,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:57:02,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:57:02,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:57:02,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:57:02,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:57:02,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:57:02,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:57:02,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:57:02,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:57:02,264 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:57:02,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:57:02,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:57:02,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:57:02,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:57:02,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:57:02,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:57:02,275 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:57:02,275 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:57:02,276 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:57:02,277 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:57:02,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:57:02,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:57:02,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:57:02,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:57:02,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:57:02,283 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:57:02,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:57:02,284 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:57:02,284 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:57:02,285 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:57:02,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:57:02,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:57:02,288 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 01:57:02,316 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:57:02,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:57:02,328 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:57:02,329 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:57:02,330 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:57:02,330 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:57:02,330 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:57:02,330 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:57:02,331 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:57:02,331 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:57:02,331 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:57:02,331 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:57:02,331 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:57:02,332 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:57:02,332 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:57:02,332 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:57:02,333 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:57:02,333 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:57:02,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:57:02,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:57:02,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:57:02,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:57:02,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:57:02,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:57:02,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:57:02,335 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:57:02,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:57:02,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:57:02,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:57:02,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:57:02,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:57:02,337 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:57:02,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:57:02,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:57:02,338 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:57:02,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:57:02,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:57:02,339 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:57:02,339 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_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2259272f0273dfac0cad582092d6645e308d8387476548b6016b816b129472dc [2022-11-03 01:57:02,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:57:02,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:57:02,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:57:02,641 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:57:02,642 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:57:02,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i [2022-11-03 01:57:02,744 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/data/1c847e60c/f36fed866fff4ac8aa104b9fb681ba65/FLAGaacd8a966 [2022-11-03 01:57:03,589 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:57:03,592 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i [2022-11-03 01:57:03,621 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/data/1c847e60c/f36fed866fff4ac8aa104b9fb681ba65/FLAGaacd8a966 [2022-11-03 01:57:04,111 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/data/1c847e60c/f36fed866fff4ac8aa104b9fb681ba65 [2022-11-03 01:57:04,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:57:04,119 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:57:04,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:57:04,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:57:04,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:57:04,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:57:04" (1/1) ... [2022-11-03 01:57:04,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d05fffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:04, skipping insertion in model container [2022-11-03 01:57:04,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:57:04" (1/1) ... [2022-11-03 01:57:04,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:57:04,233 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:57:05,578 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_a8640cef-961c-4365-b3be-4d2467ff7e85/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i[160403,160416] [2022-11-03 01:57:05,704 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:57:05,747 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:57:06,021 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_a8640cef-961c-4365-b3be-4d2467ff7e85/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i[160403,160416] [2022-11-03 01:57:06,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:57:06,143 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:57:06,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:06 WrapperNode [2022-11-03 01:57:06,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:57:06,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:57:06,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:57:06,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:57:06,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:06" (1/1) ... [2022-11-03 01:57:06,234 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:06" (1/1) ... [2022-11-03 01:57:06,386 INFO L138 Inliner]: procedures = 196, calls = 979, calls flagged for inlining = 91, calls inlined = 82, statements flattened = 2523 [2022-11-03 01:57:06,386 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:57:06,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:57:06,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:57:06,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:57:06,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:06" (1/1) ... [2022-11-03 01:57:06,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:06" (1/1) ... [2022-11-03 01:57:06,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:06" (1/1) ... [2022-11-03 01:57:06,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:06" (1/1) ... [2022-11-03 01:57:06,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:06" (1/1) ... [2022-11-03 01:57:06,507 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:06" (1/1) ... [2022-11-03 01:57:06,518 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:06" (1/1) ... [2022-11-03 01:57:06,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:06" (1/1) ... [2022-11-03 01:57:06,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:57:06,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:57:06,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:57:06,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:57:06,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:06" (1/1) ... [2022-11-03 01:57:06,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:57:06,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:06,598 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:57:06,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:57:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 01:57:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_input_exit [2022-11-03 01:57:06,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_input_exit [2022-11-03 01:57:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure variable_test_bit [2022-11-03 01:57:06,654 INFO L138 BoogieDeclarations]: Found implementation of procedure variable_test_bit [2022-11-03 01:57:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 01:57:06,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 01:57:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_input_report [2022-11-03 01:57:06,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_input_report [2022-11-03 01:57:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure seq_read [2022-11-03 01:57:06,655 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_read [2022-11-03 01:57:06,655 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-03 01:57:06,655 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-03 01:57:06,655 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 01:57:06,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 01:57:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-03 01:57:06,657 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-03 01:57:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_sync_rfk_state [2022-11-03 01:57:06,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_sync_rfk_state [2022-11-03 01:57:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:57:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 01:57:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure read_ec_data [2022-11-03 01:57:06,658 INFO L138 BoogieDeclarations]: Found implementation of procedure read_ec_data [2022-11-03 01:57:06,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:57:06,658 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2022-11-03 01:57:06,658 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2022-11-03 01:57:06,658 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_sync_touchpad_state [2022-11-03 01:57:06,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_sync_touchpad_state [2022-11-03 01:57:06,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 01:57:06,659 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-03 01:57:06,659 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-03 01:57:06,660 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_backlight_init [2022-11-03 01:57:06,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_backlight_init [2022-11-03 01:57:06,660 INFO L130 BoogieDeclarations]: Found specification of procedure acpi_evaluate_integer [2022-11-03 01:57:06,660 INFO L138 BoogieDeclarations]: Found implementation of procedure acpi_evaluate_integer [2022-11-03 01:57:06,660 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2022-11-03 01:57:06,661 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2022-11-03 01:57:06,661 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_acpi_notify [2022-11-03 01:57:06,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_acpi_notify [2022-11-03 01:57:06,661 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2022-11-03 01:57:06,662 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2022-11-03 01:57:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 01:57:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure rfkill_destroy [2022-11-03 01:57:06,662 INFO L138 BoogieDeclarations]: Found implementation of procedure rfkill_destroy [2022-11-03 01:57:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:57:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure backlight_update_status [2022-11-03 01:57:06,663 INFO L138 BoogieDeclarations]: Found implementation of procedure backlight_update_status [2022-11-03 01:57:06,663 INFO L130 BoogieDeclarations]: Found specification of procedure single_open [2022-11-03 01:57:06,664 INFO L138 BoogieDeclarations]: Found implementation of procedure single_open [2022-11-03 01:57:06,665 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_acpi_add [2022-11-03 01:57:06,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_acpi_add [2022-11-03 01:57:06,666 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_backlight_update_status [2022-11-03 01:57:06,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_backlight_update_status [2022-11-03 01:57:06,667 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-03 01:57:06,667 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-03 01:57:06,667 INFO L130 BoogieDeclarations]: Found specification of procedure rfkill_init_sw_state [2022-11-03 01:57:06,668 INFO L138 BoogieDeclarations]: Found implementation of procedure rfkill_init_sw_state [2022-11-03 01:57:06,668 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 01:57:06,669 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 01:57:06,669 INFO L130 BoogieDeclarations]: Found specification of procedure debugfs_create_file [2022-11-03 01:57:06,669 INFO L138 BoogieDeclarations]: Found implementation of procedure debugfs_create_file [2022-11-03 01:57:06,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:57:06,669 INFO L130 BoogieDeclarations]: Found specification of procedure single_release [2022-11-03 01:57:06,669 INFO L138 BoogieDeclarations]: Found implementation of procedure single_release [2022-11-03 01:57:06,670 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_backlight_get_brightness [2022-11-03 01:57:06,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_backlight_get_brightness [2022-11-03 01:57:06,670 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_unregister_rfkill [2022-11-03 01:57:06,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_unregister_rfkill [2022-11-03 01:57:06,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:57:06,670 INFO L130 BoogieDeclarations]: Found specification of procedure seq_lseek [2022-11-03 01:57:06,671 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_lseek [2022-11-03 01:57:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:57:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure method_vpcr [2022-11-03 01:57:06,672 INFO L138 BoogieDeclarations]: Found implementation of procedure method_vpcr [2022-11-03 01:57:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure method_vpcw [2022-11-03 01:57:06,672 INFO L138 BoogieDeclarations]: Found implementation of procedure method_vpcw [2022-11-03 01:57:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure sparse_keymap_free [2022-11-03 01:57:06,673 INFO L138 BoogieDeclarations]: Found implementation of procedure sparse_keymap_free [2022-11-03 01:57:06,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 01:57:06,673 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2022-11-03 01:57:06,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2022-11-03 01:57:06,674 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_acpi_resume [2022-11-03 01:57:06,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_acpi_resume [2022-11-03 01:57:06,674 INFO L130 BoogieDeclarations]: Found specification of procedure write_ec_cmd [2022-11-03 01:57:06,675 INFO L138 BoogieDeclarations]: Found implementation of procedure write_ec_cmd [2022-11-03 01:57:06,675 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_platform_exit [2022-11-03 01:57:06,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_platform_exit [2022-11-03 01:57:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_debugfs_exit [2022-11-03 01:57:06,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_debugfs_exit [2022-11-03 01:57:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:57:06,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:57:06,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:57:07,248 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:57:07,253 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:57:19,602 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:57:21,123 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:57:21,124 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 01:57:21,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:57:21 BoogieIcfgContainer [2022-11-03 01:57:21,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:57:21,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:57:21,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:57:21,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:57:21,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:57:04" (1/3) ... [2022-11-03 01:57:21,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6121e51a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:57:21, skipping insertion in model container [2022-11-03 01:57:21,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:06" (2/3) ... [2022-11-03 01:57:21,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6121e51a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:57:21, skipping insertion in model container [2022-11-03 01:57:21,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:57:21" (3/3) ... [2022-11-03 01:57:21,138 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i [2022-11-03 01:57:21,162 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:57:21,162 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:57:21,239 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:57:21,257 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;@4bae7442, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:57:21,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:57:21,270 INFO L276 IsEmpty]: Start isEmpty. Operand has 473 states, 316 states have (on average 1.4778481012658229) internal successors, (467), 335 states have internal predecessors, (467), 116 states have call successors, (116), 39 states have call predecessors, (116), 39 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-03 01:57:21,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 01:57:21,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:21,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:21,299 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:21,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:21,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1614419724, now seen corresponding path program 1 times [2022-11-03 01:57:21,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:21,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111907287] [2022-11-03 01:57:21,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:21,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:22,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:22,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:22,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111907287] [2022-11-03 01:57:22,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111907287] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:22,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:22,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:57:22,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696113427] [2022-11-03 01:57:22,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:22,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:57:22,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:22,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:57:22,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:22,169 INFO L87 Difference]: Start difference. First operand has 473 states, 316 states have (on average 1.4778481012658229) internal successors, (467), 335 states have internal predecessors, (467), 116 states have call successors, (116), 39 states have call predecessors, (116), 39 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:24,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:57:24,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:24,945 INFO L93 Difference]: Finished difference Result 1401 states and 2081 transitions. [2022-11-03 01:57:24,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:57:24,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-03 01:57:24,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:24,967 INFO L225 Difference]: With dead ends: 1401 [2022-11-03 01:57:24,967 INFO L226 Difference]: Without dead ends: 927 [2022-11-03 01:57:24,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:24,978 INFO L413 NwaCegarLoop]: 701 mSDtfsCounter, 655 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:24,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 1289 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 201 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 01:57:24,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-11-03 01:57:25,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 923. [2022-11-03 01:57:25,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 621 states have (on average 1.4669887278582932) internal successors, (911), 649 states have internal predecessors, (911), 225 states have call successors, (225), 77 states have call predecessors, (225), 76 states have return successors, (218), 210 states have call predecessors, (218), 218 states have call successors, (218) [2022-11-03 01:57:25,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1354 transitions. [2022-11-03 01:57:25,122 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1354 transitions. Word has length 18 [2022-11-03 01:57:25,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:25,122 INFO L495 AbstractCegarLoop]: Abstraction has 923 states and 1354 transitions. [2022-11-03 01:57:25,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:25,123 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1354 transitions. [2022-11-03 01:57:25,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 01:57:25,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:25,132 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:25,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:57:25,132 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:25,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:25,133 INFO L85 PathProgramCache]: Analyzing trace with hash 230421843, now seen corresponding path program 1 times [2022-11-03 01:57:25,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:25,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644723303] [2022-11-03 01:57:25,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:25,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:25,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:25,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644723303] [2022-11-03 01:57:25,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644723303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:25,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:25,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:57:25,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051050379] [2022-11-03 01:57:25,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:25,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:57:25,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:25,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:57:25,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:25,585 INFO L87 Difference]: Start difference. First operand 923 states and 1354 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:27,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:57:28,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:28,027 INFO L93 Difference]: Finished difference Result 925 states and 1355 transitions. [2022-11-03 01:57:28,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:57:28,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-03 01:57:28,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:28,035 INFO L225 Difference]: With dead ends: 925 [2022-11-03 01:57:28,036 INFO L226 Difference]: Without dead ends: 922 [2022-11-03 01:57:28,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:28,039 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 670 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:28,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 589 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 01:57:28,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-11-03 01:57:28,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 922. [2022-11-03 01:57:28,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 621 states have (on average 1.465378421900161) internal successors, (910), 648 states have internal predecessors, (910), 224 states have call successors, (224), 77 states have call predecessors, (224), 76 states have return successors, (218), 210 states have call predecessors, (218), 218 states have call successors, (218) [2022-11-03 01:57:28,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1352 transitions. [2022-11-03 01:57:28,127 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1352 transitions. Word has length 20 [2022-11-03 01:57:28,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:28,128 INFO L495 AbstractCegarLoop]: Abstraction has 922 states and 1352 transitions. [2022-11-03 01:57:28,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:28,128 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1352 transitions. [2022-11-03 01:57:28,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 01:57:28,132 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:28,132 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:28,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:57:28,132 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:28,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:28,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1447111222, now seen corresponding path program 1 times [2022-11-03 01:57:28,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:28,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929033550] [2022-11-03 01:57:28,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:28,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:28,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:28,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929033550] [2022-11-03 01:57:28,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929033550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:28,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:28,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:57:28,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456319049] [2022-11-03 01:57:28,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:28,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:57:28,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:28,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:57:28,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:28,501 INFO L87 Difference]: Start difference. First operand 922 states and 1352 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:30,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:57:30,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:30,918 INFO L93 Difference]: Finished difference Result 924 states and 1353 transitions. [2022-11-03 01:57:30,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:57:30,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-03 01:57:30,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:30,929 INFO L225 Difference]: With dead ends: 924 [2022-11-03 01:57:30,930 INFO L226 Difference]: Without dead ends: 921 [2022-11-03 01:57:30,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:30,932 INFO L413 NwaCegarLoop]: 587 mSDtfsCounter, 667 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:30,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 587 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 01:57:30,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-11-03 01:57:30,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 921. [2022-11-03 01:57:31,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 621 states have (on average 1.463768115942029) internal successors, (909), 647 states have internal predecessors, (909), 223 states have call successors, (223), 77 states have call predecessors, (223), 76 states have return successors, (218), 210 states have call predecessors, (218), 218 states have call successors, (218) [2022-11-03 01:57:31,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1350 transitions. [2022-11-03 01:57:31,009 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1350 transitions. Word has length 21 [2022-11-03 01:57:31,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:31,010 INFO L495 AbstractCegarLoop]: Abstraction has 921 states and 1350 transitions. [2022-11-03 01:57:31,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:31,010 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1350 transitions. [2022-11-03 01:57:31,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 01:57:31,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:31,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:31,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:57:31,012 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:31,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:31,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1911023818, now seen corresponding path program 1 times [2022-11-03 01:57:31,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:31,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404235700] [2022-11-03 01:57:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:31,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:31,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:31,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404235700] [2022-11-03 01:57:31,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404235700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:31,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:31,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:57:31,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818783253] [2022-11-03 01:57:31,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:31,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:57:31,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:31,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:57:31,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:31,251 INFO L87 Difference]: Start difference. First operand 921 states and 1350 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:33,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:57:33,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:33,684 INFO L93 Difference]: Finished difference Result 923 states and 1351 transitions. [2022-11-03 01:57:33,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:57:33,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-03 01:57:33,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:33,692 INFO L225 Difference]: With dead ends: 923 [2022-11-03 01:57:33,692 INFO L226 Difference]: Without dead ends: 920 [2022-11-03 01:57:33,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:33,696 INFO L413 NwaCegarLoop]: 585 mSDtfsCounter, 664 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:33,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 585 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 01:57:33,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-11-03 01:57:33,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 920. [2022-11-03 01:57:33,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 621 states have (on average 1.462157809983897) internal successors, (908), 646 states have internal predecessors, (908), 222 states have call successors, (222), 77 states have call predecessors, (222), 76 states have return successors, (218), 210 states have call predecessors, (218), 218 states have call successors, (218) [2022-11-03 01:57:33,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1348 transitions. [2022-11-03 01:57:33,777 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1348 transitions. Word has length 22 [2022-11-03 01:57:33,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:33,777 INFO L495 AbstractCegarLoop]: Abstraction has 920 states and 1348 transitions. [2022-11-03 01:57:33,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:33,778 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1348 transitions. [2022-11-03 01:57:33,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 01:57:33,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:33,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:33,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:57:33,780 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:33,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:33,781 INFO L85 PathProgramCache]: Analyzing trace with hash 887559757, now seen corresponding path program 1 times [2022-11-03 01:57:33,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:33,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169557619] [2022-11-03 01:57:33,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:33,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:33,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:34,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:34,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169557619] [2022-11-03 01:57:34,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169557619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:34,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:34,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:57:34,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620899659] [2022-11-03 01:57:34,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:34,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:57:34,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:34,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:57:34,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:34,023 INFO L87 Difference]: Start difference. First operand 920 states and 1348 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:36,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:57:36,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:36,582 INFO L93 Difference]: Finished difference Result 922 states and 1349 transitions. [2022-11-03 01:57:36,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:57:36,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-03 01:57:36,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:36,588 INFO L225 Difference]: With dead ends: 922 [2022-11-03 01:57:36,589 INFO L226 Difference]: Without dead ends: 919 [2022-11-03 01:57:36,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:36,590 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 661 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:36,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [661 Valid, 583 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 01:57:36,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-11-03 01:57:36,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 919. [2022-11-03 01:57:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 621 states have (on average 1.460547504025765) internal successors, (907), 645 states have internal predecessors, (907), 221 states have call successors, (221), 77 states have call predecessors, (221), 76 states have return successors, (218), 210 states have call predecessors, (218), 218 states have call successors, (218) [2022-11-03 01:57:36,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1346 transitions. [2022-11-03 01:57:36,661 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1346 transitions. Word has length 23 [2022-11-03 01:57:36,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:36,662 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1346 transitions. [2022-11-03 01:57:36,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:36,662 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1346 transitions. [2022-11-03 01:57:36,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 01:57:36,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:36,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:36,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 01:57:36,665 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:36,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:36,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1744309529, now seen corresponding path program 1 times [2022-11-03 01:57:36,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:36,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686633274] [2022-11-03 01:57:36,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:36,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:36,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:36,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686633274] [2022-11-03 01:57:36,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686633274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:36,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:36,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:57:36,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663961198] [2022-11-03 01:57:36,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:36,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:57:36,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:36,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:57:36,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:36,885 INFO L87 Difference]: Start difference. First operand 919 states and 1346 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:38,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:57:39,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:39,474 INFO L93 Difference]: Finished difference Result 2289 states and 3302 transitions. [2022-11-03 01:57:39,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:57:39,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-03 01:57:39,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:39,485 INFO L225 Difference]: With dead ends: 2289 [2022-11-03 01:57:39,485 INFO L226 Difference]: Without dead ends: 1365 [2022-11-03 01:57:39,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:39,494 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 631 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:39,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 911 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 155 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 01:57:39,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2022-11-03 01:57:39,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1359. [2022-11-03 01:57:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 894 states have (on average 1.4116331096196868) internal successors, (1262), 926 states have internal predecessors, (1262), 330 states have call successors, (330), 135 states have call predecessors, (330), 134 states have return successors, (334), 321 states have call predecessors, (334), 328 states have call successors, (334) [2022-11-03 01:57:39,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 1926 transitions. [2022-11-03 01:57:39,620 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 1926 transitions. Word has length 24 [2022-11-03 01:57:39,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:39,621 INFO L495 AbstractCegarLoop]: Abstraction has 1359 states and 1926 transitions. [2022-11-03 01:57:39,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:39,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 1926 transitions. [2022-11-03 01:57:39,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-03 01:57:39,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:39,632 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 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] [2022-11-03 01:57:39,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 01:57:39,632 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:39,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:39,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1744246743, now seen corresponding path program 1 times [2022-11-03 01:57:39,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:39,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290221658] [2022-11-03 01:57:39,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:39,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-03 01:57:40,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:40,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290221658] [2022-11-03 01:57:40,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290221658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:40,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:40,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:57:40,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711590285] [2022-11-03 01:57:40,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:40,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:57:40,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:40,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:57:40,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:40,213 INFO L87 Difference]: Start difference. First operand 1359 states and 1926 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 01:57:42,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:57:42,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:42,856 INFO L93 Difference]: Finished difference Result 2454 states and 3507 transitions. [2022-11-03 01:57:42,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:57:42,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 154 [2022-11-03 01:57:42,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:42,863 INFO L225 Difference]: With dead ends: 2454 [2022-11-03 01:57:42,863 INFO L226 Difference]: Without dead ends: 1096 [2022-11-03 01:57:42,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:42,868 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 298 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:42,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 1181 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 01:57:42,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2022-11-03 01:57:42,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1096. [2022-11-03 01:57:42,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 744 states have (on average 1.461021505376344) internal successors, (1087), 762 states have internal predecessors, (1087), 246 states have call successors, (246), 106 states have call predecessors, (246), 105 states have return successors, (247), 241 states have call predecessors, (247), 244 states have call successors, (247) [2022-11-03 01:57:42,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1580 transitions. [2022-11-03 01:57:42,938 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1580 transitions. Word has length 154 [2022-11-03 01:57:42,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:42,939 INFO L495 AbstractCegarLoop]: Abstraction has 1096 states and 1580 transitions. [2022-11-03 01:57:42,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 01:57:42,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1580 transitions. [2022-11-03 01:57:42,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-11-03 01:57:42,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:42,944 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:42,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 01:57:42,945 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:42,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:42,945 INFO L85 PathProgramCache]: Analyzing trace with hash 96110057, now seen corresponding path program 1 times [2022-11-03 01:57:42,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:42,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535017404] [2022-11-03 01:57:42,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:42,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-03 01:57:43,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:43,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535017404] [2022-11-03 01:57:43,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535017404] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:43,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:43,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:57:43,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559532859] [2022-11-03 01:57:43,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:43,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:43,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:43,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:43,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:43,603 INFO L87 Difference]: Start difference. First operand 1096 states and 1580 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 01:57:45,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:57:46,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:46,360 INFO L93 Difference]: Finished difference Result 1997 states and 2879 transitions. [2022-11-03 01:57:46,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:57:46,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 169 [2022-11-03 01:57:46,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:46,369 INFO L225 Difference]: With dead ends: 1997 [2022-11-03 01:57:46,369 INFO L226 Difference]: Without dead ends: 1108 [2022-11-03 01:57:46,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:57:46,374 INFO L413 NwaCegarLoop]: 577 mSDtfsCounter, 7 mSDsluCounter, 1327 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1716 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:46,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1716 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 01:57:46,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2022-11-03 01:57:46,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1104. [2022-11-03 01:57:46,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 750 states have (on average 1.4573333333333334) internal successors, (1093), 769 states have internal predecessors, (1093), 247 states have call successors, (247), 106 states have call predecessors, (247), 106 states have return successors, (249), 242 states have call predecessors, (249), 245 states have call successors, (249) [2022-11-03 01:57:46,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1589 transitions. [2022-11-03 01:57:46,473 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1589 transitions. Word has length 169 [2022-11-03 01:57:46,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:46,473 INFO L495 AbstractCegarLoop]: Abstraction has 1104 states and 1589 transitions. [2022-11-03 01:57:46,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 01:57:46,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1589 transitions. [2022-11-03 01:57:46,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-03 01:57:46,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:46,484 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:46,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 01:57:46,485 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:46,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:46,486 INFO L85 PathProgramCache]: Analyzing trace with hash 2081288391, now seen corresponding path program 1 times [2022-11-03 01:57:46,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:46,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349131853] [2022-11-03 01:57:46,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:46,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-03 01:57:47,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:47,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349131853] [2022-11-03 01:57:47,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349131853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:47,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:47,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:57:47,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858682838] [2022-11-03 01:57:47,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:47,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:57:47,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:47,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:57:47,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:57:47,449 INFO L87 Difference]: Start difference. First operand 1104 states and 1589 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 01:57:49,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:57:50,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:50,418 INFO L93 Difference]: Finished difference Result 2021 states and 2907 transitions. [2022-11-03 01:57:50,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:57:50,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 175 [2022-11-03 01:57:50,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:50,428 INFO L225 Difference]: With dead ends: 2021 [2022-11-03 01:57:50,428 INFO L226 Difference]: Without dead ends: 1124 [2022-11-03 01:57:50,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:57:50,434 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 17 mSDsluCounter, 1992 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2296 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:50,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 2296 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 400 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-11-03 01:57:50,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-11-03 01:57:50,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1104. [2022-11-03 01:57:50,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 750 states have (on average 1.4573333333333334) internal successors, (1093), 769 states have internal predecessors, (1093), 247 states have call successors, (247), 106 states have call predecessors, (247), 106 states have return successors, (249), 242 states have call predecessors, (249), 245 states have call successors, (249) [2022-11-03 01:57:50,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1589 transitions. [2022-11-03 01:57:50,546 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1589 transitions. Word has length 175 [2022-11-03 01:57:50,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:50,546 INFO L495 AbstractCegarLoop]: Abstraction has 1104 states and 1589 transitions. [2022-11-03 01:57:50,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 01:57:50,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1589 transitions. [2022-11-03 01:57:50,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-03 01:57:50,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:50,552 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:50,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 01:57:50,553 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:50,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:50,553 INFO L85 PathProgramCache]: Analyzing trace with hash 619583377, now seen corresponding path program 1 times [2022-11-03 01:57:50,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:50,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168390059] [2022-11-03 01:57:50,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:50,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-03 01:57:51,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:51,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168390059] [2022-11-03 01:57:51,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168390059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:51,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:51,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:57:51,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143660186] [2022-11-03 01:57:51,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:51,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:51,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:51,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:51,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:51,131 INFO L87 Difference]: Start difference. First operand 1104 states and 1589 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 01:57:53,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:57:53,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:53,938 INFO L93 Difference]: Finished difference Result 2015 states and 2901 transitions. [2022-11-03 01:57:53,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:57:53,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 175 [2022-11-03 01:57:53,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:53,948 INFO L225 Difference]: With dead ends: 2015 [2022-11-03 01:57:53,948 INFO L226 Difference]: Without dead ends: 1118 [2022-11-03 01:57:53,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:57:53,953 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 7 mSDsluCounter, 1330 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:53,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1721 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 304 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-11-03 01:57:53,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-11-03 01:57:54,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1109. [2022-11-03 01:57:54,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 754 states have (on average 1.4549071618037135) internal successors, (1097), 774 states have internal predecessors, (1097), 248 states have call successors, (248), 106 states have call predecessors, (248), 106 states have return successors, (250), 243 states have call predecessors, (250), 246 states have call successors, (250) [2022-11-03 01:57:54,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1595 transitions. [2022-11-03 01:57:54,048 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1595 transitions. Word has length 175 [2022-11-03 01:57:54,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:54,050 INFO L495 AbstractCegarLoop]: Abstraction has 1109 states and 1595 transitions. [2022-11-03 01:57:54,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 01:57:54,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1595 transitions. [2022-11-03 01:57:54,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-03 01:57:54,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:54,058 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:54,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 01:57:54,058 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:54,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:54,059 INFO L85 PathProgramCache]: Analyzing trace with hash 520028927, now seen corresponding path program 1 times [2022-11-03 01:57:54,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:54,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041902951] [2022-11-03 01:57:54,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:54,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:54,791 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-03 01:57:54,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:54,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041902951] [2022-11-03 01:57:54,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041902951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:54,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:54,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:57:54,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946956829] [2022-11-03 01:57:54,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:54,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:54,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:54,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:54,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:54,795 INFO L87 Difference]: Start difference. First operand 1109 states and 1595 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-03 01:57:56,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:57:57,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:57,485 INFO L93 Difference]: Finished difference Result 2027 states and 2917 transitions. [2022-11-03 01:57:57,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:57:57,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 192 [2022-11-03 01:57:57,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:57,492 INFO L225 Difference]: With dead ends: 2027 [2022-11-03 01:57:57,493 INFO L226 Difference]: Without dead ends: 1125 [2022-11-03 01:57:57,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:57:57,498 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 7 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:57,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1725 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 304 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 01:57:57,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2022-11-03 01:57:57,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1114. [2022-11-03 01:57:57,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 758 states have (on average 1.4525065963060686) internal successors, (1101), 779 states have internal predecessors, (1101), 249 states have call successors, (249), 106 states have call predecessors, (249), 106 states have return successors, (251), 244 states have call predecessors, (251), 247 states have call successors, (251) [2022-11-03 01:57:57,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1601 transitions. [2022-11-03 01:57:57,579 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1601 transitions. Word has length 192 [2022-11-03 01:57:57,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:57,580 INFO L495 AbstractCegarLoop]: Abstraction has 1114 states and 1601 transitions. [2022-11-03 01:57:57,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-03 01:57:57,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1601 transitions. [2022-11-03 01:57:57,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 01:57:57,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:57,586 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:57,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 01:57:57,587 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:57,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:57,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1027053048, now seen corresponding path program 1 times [2022-11-03 01:57:57,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:57,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475005927] [2022-11-03 01:57:57,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:57,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-03 01:57:58,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:58,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475005927] [2022-11-03 01:57:58,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475005927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:58,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:58,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:57:58,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450982315] [2022-11-03 01:57:58,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:58,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:57:58,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:58,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:57:58,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:58,272 INFO L87 Difference]: Start difference. First operand 1114 states and 1601 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-03 01:58:00,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:58:00,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:00,801 INFO L93 Difference]: Finished difference Result 2077 states and 2993 transitions. [2022-11-03 01:58:00,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:58:00,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 194 [2022-11-03 01:58:00,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:00,808 INFO L225 Difference]: With dead ends: 2077 [2022-11-03 01:58:00,808 INFO L226 Difference]: Without dead ends: 1170 [2022-11-03 01:58:00,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:00,812 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 22 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:00,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1146 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 203 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 01:58:00,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2022-11-03 01:58:00,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1118. [2022-11-03 01:58:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 762 states have (on average 1.4501312335958005) internal successors, (1105), 783 states have internal predecessors, (1105), 249 states have call successors, (249), 106 states have call predecessors, (249), 106 states have return successors, (251), 244 states have call predecessors, (251), 247 states have call successors, (251) [2022-11-03 01:58:00,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1605 transitions. [2022-11-03 01:58:00,883 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1605 transitions. Word has length 194 [2022-11-03 01:58:00,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:00,884 INFO L495 AbstractCegarLoop]: Abstraction has 1118 states and 1605 transitions. [2022-11-03 01:58:00,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-03 01:58:00,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1605 transitions. [2022-11-03 01:58:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-11-03 01:58:00,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:00,890 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:58:00,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 01:58:00,890 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:00,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:00,891 INFO L85 PathProgramCache]: Analyzing trace with hash 373750716, now seen corresponding path program 1 times [2022-11-03 01:58:00,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:00,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511518206] [2022-11-03 01:58:00,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:00,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-03 01:58:01,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:01,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511518206] [2022-11-03 01:58:01,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511518206] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:58:01,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600528656] [2022-11-03 01:58:01,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:01,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:01,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:01,621 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:58:01,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:58:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:03,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 4355 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:58:03,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:03,322 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-03 01:58:03,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:03,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600528656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:03,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:58:03,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-03 01:58:03,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372239460] [2022-11-03 01:58:03,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:03,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:58:03,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:58:03,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:58:03,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:58:03,325 INFO L87 Difference]: Start difference. First operand 1118 states and 1605 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 01:58:05,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:58:06,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:06,001 INFO L93 Difference]: Finished difference Result 1423 states and 1991 transitions. [2022-11-03 01:58:06,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:58:06,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 201 [2022-11-03 01:58:06,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:06,008 INFO L225 Difference]: With dead ends: 1423 [2022-11-03 01:58:06,008 INFO L226 Difference]: Without dead ends: 1111 [2022-11-03 01:58:06,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:58:06,011 INFO L413 NwaCegarLoop]: 809 mSDtfsCounter, 314 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:06,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 1351 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 238 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 01:58:06,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-11-03 01:58:06,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 1105. [2022-11-03 01:58:06,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 755 states have (on average 1.4516556291390728) internal successors, (1096), 773 states have internal predecessors, (1096), 245 states have call successors, (245), 106 states have call predecessors, (245), 104 states have return successors, (243), 239 states have call predecessors, (243), 243 states have call successors, (243) [2022-11-03 01:58:06,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1584 transitions. [2022-11-03 01:58:06,085 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1584 transitions. Word has length 201 [2022-11-03 01:58:06,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:06,086 INFO L495 AbstractCegarLoop]: Abstraction has 1105 states and 1584 transitions. [2022-11-03 01:58:06,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 01:58:06,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1584 transitions. [2022-11-03 01:58:06,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-11-03 01:58:06,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:06,097 INFO L195 NwaCegarLoop]: trace histogram [16, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:58:06,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:06,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:06,319 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:06,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:06,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1467801152, now seen corresponding path program 1 times [2022-11-03 01:58:06,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:06,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151943615] [2022-11-03 01:58:06,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:06,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2022-11-03 01:58:07,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:07,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151943615] [2022-11-03 01:58:07,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151943615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:58:07,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456714720] [2022-11-03 01:58:07,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:07,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:07,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:07,698 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:58:07,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:58:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:10,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 6790 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:58:10,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:10,276 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 208 proven. 1 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2022-11-03 01:58:10,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:10,693 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2022-11-03 01:58:10,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456714720] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:10,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [152820763] [2022-11-03 01:58:10,739 INFO L159 IcfgInterpreter]: Started Sifa with 139 locations of interest [2022-11-03 01:58:10,739 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:58:10,746 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 01:58:10,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:58:10,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-11-03 01:58:10,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461350110] [2022-11-03 01:58:10,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:58:10,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:58:10,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:58:10,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:58:10,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:58:10,759 INFO L87 Difference]: Start difference. First operand 1105 states and 1584 transitions. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 5 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (60), 5 states have call predecessors, (60), 5 states have call successors, (60) [2022-11-03 01:58:12,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:58:13,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:13,624 INFO L93 Difference]: Finished difference Result 2115 states and 3043 transitions. [2022-11-03 01:58:13,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:58:13,624 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 5 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (60), 5 states have call predecessors, (60), 5 states have call successors, (60) Word has length 365 [2022-11-03 01:58:13,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:13,632 INFO L225 Difference]: With dead ends: 2115 [2022-11-03 01:58:13,632 INFO L226 Difference]: Without dead ends: 1217 [2022-11-03 01:58:13,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 727 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:58:13,636 INFO L413 NwaCegarLoop]: 587 mSDtfsCounter, 85 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1712 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:13,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1712 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 344 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-11-03 01:58:13,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2022-11-03 01:58:13,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1217. [2022-11-03 01:58:13,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 831 states have (on average 1.434416365824308) internal successors, (1192), 849 states have internal predecessors, (1192), 281 states have call successors, (281), 106 states have call predecessors, (281), 104 states have return successors, (279), 275 states have call predecessors, (279), 279 states have call successors, (279) [2022-11-03 01:58:13,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1752 transitions. [2022-11-03 01:58:13,754 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1752 transitions. Word has length 365 [2022-11-03 01:58:13,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:13,755 INFO L495 AbstractCegarLoop]: Abstraction has 1217 states and 1752 transitions. [2022-11-03 01:58:13,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 5 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (60), 5 states have call predecessors, (60), 5 states have call successors, (60) [2022-11-03 01:58:13,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1752 transitions. [2022-11-03 01:58:13,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2022-11-03 01:58:13,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:13,769 INFO L195 NwaCegarLoop]: trace histogram [16, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:58:13,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:13,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 01:58:13,985 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:13,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:13,985 INFO L85 PathProgramCache]: Analyzing trace with hash 632358080, now seen corresponding path program 2 times [2022-11-03 01:58:13,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:13,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631918649] [2022-11-03 01:58:13,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:13,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:15,585 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 101 proven. 14 refuted. 0 times theorem prover too weak. 749 trivial. 0 not checked. [2022-11-03 01:58:15,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:15,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631918649] [2022-11-03 01:58:15,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631918649] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:58:15,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728477868] [2022-11-03 01:58:15,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:58:15,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:15,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:15,588 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:58:15,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8640cef-961c-4365-b3be-4d2467ff7e85/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process