./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061c2a0-9d9a-4271-8da1-8ba84c05364b/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061c2a0-9d9a-4271-8da1-8ba84c05364b/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061c2a0-9d9a-4271-8da1-8ba84c05364b/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061c2a0-9d9a-4271-8da1-8ba84c05364b/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061c2a0-9d9a-4271-8da1-8ba84c05364b/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061c2a0-9d9a-4271-8da1-8ba84c05364b/bin/utaipan-EQgc7hIp5V --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 1ad6d1ed8310d8e3264189ac87472d58c77647a0c63d75779b5974e889987542 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:40:25,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:40:25,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:40:25,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:40:25,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:40:25,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:40:25,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:40:25,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:40:25,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:40:25,241 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:40:25,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:40:25,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:40:25,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:40:25,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:40:25,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:40:25,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:40:25,259 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:40:25,260 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:40:25,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:40:25,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:40:25,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:40:25,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:40:25,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:40:25,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:40:25,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:40:25,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:40:25,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:40:25,303 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:40:25,303 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:40:25,304 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:40:25,305 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:40:25,306 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:40:25,307 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:40:25,308 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:40:25,310 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:40:25,310 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:40:25,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:40:25,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:40:25,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:40:25,313 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:40:25,314 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:40:25,315 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061c2a0-9d9a-4271-8da1-8ba84c05364b/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 03:40:25,350 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:40:25,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:40:25,351 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:40:25,351 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:40:25,352 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:40:25,353 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:40:25,353 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:40:25,353 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:40:25,353 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:40:25,354 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:40:25,354 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:40:25,354 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:40:25,354 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:40:25,354 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:40:25,355 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:40:25,355 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:40:25,355 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:40:25,355 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:40:25,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:40:25,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:40:25,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:40:25,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:40:25,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:40:25,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:40:25,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:40:25,358 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:40:25,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:40:25,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:40:25,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:40:25,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:40:25,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:40:25,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:40:25,360 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:40:25,360 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:40:25,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:40:25,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:40:25,361 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:40:25,361 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:40:25,362 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061c2a0-9d9a-4271-8da1-8ba84c05364b/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061c2a0-9d9a-4271-8da1-8ba84c05364b/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ad6d1ed8310d8e3264189ac87472d58c77647a0c63d75779b5974e889987542 [2021-11-23 03:40:25,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:40:25,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:40:25,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:40:25,816 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:40:25,817 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:40:25,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061c2a0-9d9a-4271-8da1-8ba84c05364b/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i [2021-11-23 03:40:25,922 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061c2a0-9d9a-4271-8da1-8ba84c05364b/bin/utaipan-EQgc7hIp5V/data/d1680df26/563817ed98ef490dbc797cc680f2ec41/FLAG7976e190f [2021-11-23 03:40:27,029 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:40:27,030 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061c2a0-9d9a-4271-8da1-8ba84c05364b/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i [2021-11-23 03:40:27,096 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061c2a0-9d9a-4271-8da1-8ba84c05364b/bin/utaipan-EQgc7hIp5V/data/d1680df26/563817ed98ef490dbc797cc680f2ec41/FLAG7976e190f [2021-11-23 03:40:27,425 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061c2a0-9d9a-4271-8da1-8ba84c05364b/bin/utaipan-EQgc7hIp5V/data/d1680df26/563817ed98ef490dbc797cc680f2ec41 [2021-11-23 03:40:27,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:40:27,445 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:40:27,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:40:27,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:40:27,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:40:27,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:40:27" (1/1) ... [2021-11-23 03:40:27,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71931fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:27, skipping insertion in model container [2021-11-23 03:40:27,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:40:27" (1/1) ... [2021-11-23 03:40:27,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:40:27,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:40:28,958 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_1061c2a0-9d9a-4271-8da1-8ba84c05364b/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i[168201,168214] [2021-11-23 03:40:29,076 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:40:29,228 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:40:29,633 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_1061c2a0-9d9a-4271-8da1-8ba84c05364b/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i[168201,168214] [2021-11-23 03:40:29,664 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:40:30,054 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:40:30,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:30 WrapperNode [2021-11-23 03:40:30,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:40:30,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:40:30,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:40:30,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:40:30,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:30" (1/1) ... [2021-11-23 03:40:30,238 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:30" (1/1) ... [2021-11-23 03:40:30,453 INFO L137 Inliner]: procedures = 115, calls = 2009, calls flagged for inlining = 45, calls inlined = 37, statements flattened = 5217 [2021-11-23 03:40:30,454 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:40:30,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:40:30,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:40:30,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:40:30,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:30" (1/1) ... [2021-11-23 03:40:30,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:30" (1/1) ... [2021-11-23 03:40:30,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:30" (1/1) ... [2021-11-23 03:40:30,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:30" (1/1) ... [2021-11-23 03:40:30,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:30" (1/1) ... [2021-11-23 03:40:30,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:30" (1/1) ... [2021-11-23 03:40:30,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:30" (1/1) ... [2021-11-23 03:40:30,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:40:30,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:40:30,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:40:30,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:40:30,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:30" (1/1) ... [2021-11-23 03:40:30,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:40:30,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061c2a0-9d9a-4271-8da1-8ba84c05364b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:30,792 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061c2a0-9d9a-4271-8da1-8ba84c05364b/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:40:30,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061c2a0-9d9a-4271-8da1-8ba84c05364b/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:40:30,856 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_set_limit [2021-11-23 03:40:30,856 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_set_limit [2021-11-23 03:40:30,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:40:30,857 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_remove_group [2021-11-23 03:40:30,857 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_remove_group [2021-11-23 03:40:30,857 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_get_clientdata [2021-11-23 03:40:30,857 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_get_clientdata [2021-11-23 03:40:30,858 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_show_limit [2021-11-23 03:40:30,858 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_show_limit [2021-11-23 03:40:30,858 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_update_device [2021-11-23 03:40:30,858 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_update_device [2021-11-23 03:40:30,859 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_show_input [2021-11-23 03:40:30,859 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_show_input [2021-11-23 03:40:30,859 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_read_adc [2021-11-23 03:40:30,859 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_read_adc [2021-11-23 03:40:30,860 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 03:40:30,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 03:40:30,860 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_update_lock_of_max16065_data [2021-11-23 03:40:30,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_update_lock_of_max16065_data [2021-11-23 03:40:30,860 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_show_alarm [2021-11-23 03:40:30,861 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_show_alarm [2021-11-23 03:40:30,861 INFO L130 BoogieDeclarations]: Found specification of procedure LIMIT_TO_MV [2021-11-23 03:40:30,861 INFO L138 BoogieDeclarations]: Found implementation of procedure LIMIT_TO_MV [2021-11-23 03:40:30,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:40:30,862 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 03:40:30,862 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 03:40:30,862 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 03:40:30,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 03:40:30,863 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 03:40:30,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 03:40:30,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:40:30,864 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-23 03:40:30,864 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-23 03:40:30,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:40:30,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:40:30,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:40:30,865 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_update_lock_of_max16065_data [2021-11-23 03:40:30,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_update_lock_of_max16065_data [2021-11-23 03:40:30,865 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_read_byte_data [2021-11-23 03:40:30,866 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_read_byte_data [2021-11-23 03:40:30,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:40:30,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:40:30,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:40:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_cleanup [2021-11-23 03:40:30,867 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_cleanup [2021-11-23 03:40:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:40:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_write_byte_data [2021-11-23 03:40:30,868 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_write_byte_data [2021-11-23 03:40:30,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:40:30,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:40:30,871 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_create_file [2021-11-23 03:40:30,871 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_create_file [2021-11-23 03:40:30,871 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-23 03:40:30,871 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-23 03:40:31,784 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:40:31,788 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:40:38,059 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:40:40,549 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:40:40,549 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:40:40,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:40:40 BoogieIcfgContainer [2021-11-23 03:40:40,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:40:40,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:40:40,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:40:40,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:40:40,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:40:27" (1/3) ... [2021-11-23 03:40:40,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46a12f8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:40:40, skipping insertion in model container [2021-11-23 03:40:40,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:30" (2/3) ... [2021-11-23 03:40:40,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46a12f8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:40:40, skipping insertion in model container [2021-11-23 03:40:40,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:40:40" (3/3) ... [2021-11-23 03:40:40,567 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i [2021-11-23 03:40:40,574 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:40:40,574 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:40:40,649 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:40:40,669 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:40:40,669 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:40:40,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 867 states, 662 states have (on average 1.6752265861027191) internal successors, (1109), 669 states have internal predecessors, (1109), 182 states have call successors, (182), 21 states have call predecessors, (182), 21 states have return successors, (182), 182 states have call predecessors, (182), 182 states have call successors, (182) [2021-11-23 03:40:40,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 03:40:40,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:40,755 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1] [2021-11-23 03:40:40,756 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:40:40,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:40,763 INFO L85 PathProgramCache]: Analyzing trace with hash 820884889, now seen corresponding path program 1 times [2021-11-23 03:40:40,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:40,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934939486] [2021-11-23 03:40:40,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:40,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:41,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:41,836 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:41,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934939486] [2021-11-23 03:40:41,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934939486] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:41,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:41,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:40:41,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200746078] [2021-11-23 03:40:41,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:41,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:40:41,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:41,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:40:41,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:41,891 INFO L87 Difference]: Start difference. First operand has 867 states, 662 states have (on average 1.6752265861027191) internal successors, (1109), 669 states have internal predecessors, (1109), 182 states have call successors, (182), 21 states have call predecessors, (182), 21 states have return successors, (182), 182 states have call predecessors, (182), 182 states have call successors, (182) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:40:43,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:43,300 INFO L93 Difference]: Finished difference Result 2592 states and 4569 transitions. [2021-11-23 03:40:43,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:40:43,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-11-23 03:40:43,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:43,349 INFO L225 Difference]: With dead ends: 2592 [2021-11-23 03:40:43,349 INFO L226 Difference]: Without dead ends: 1722 [2021-11-23 03:40:43,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:43,373 INFO L933 BasicCegarLoop]: 1517 mSDtfsCounter, 1448 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1448 SdHoareTripleChecker+Valid, 2855 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:43,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1448 Valid, 2855 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 03:40:43,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2021-11-23 03:40:43,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1709. [2021-11-23 03:40:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1311 states have (on average 1.673531655225019) internal successors, (2194), 1316 states have internal predecessors, (2194), 357 states have call successors, (357), 41 states have call predecessors, (357), 40 states have return successors, (351), 351 states have call predecessors, (351), 351 states have call successors, (351) [2021-11-23 03:40:43,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 2902 transitions. [2021-11-23 03:40:43,601 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 2902 transitions. Word has length 29 [2021-11-23 03:40:43,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:43,602 INFO L470 AbstractCegarLoop]: Abstraction has 1709 states and 2902 transitions. [2021-11-23 03:40:43,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:40:43,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 2902 transitions. [2021-11-23 03:40:43,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 03:40:43,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:43,606 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:43,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:40:43,607 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:40:43,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:43,607 INFO L85 PathProgramCache]: Analyzing trace with hash 102839054, now seen corresponding path program 1 times [2021-11-23 03:40:43,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:43,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246058743] [2021-11-23 03:40:43,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:43,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:43,992 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:43,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246058743] [2021-11-23 03:40:43,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246058743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:43,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:43,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:40:43,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854837291] [2021-11-23 03:40:43,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:43,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:40:43,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:43,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:40:43,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:43,996 INFO L87 Difference]: Start difference. First operand 1709 states and 2902 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:40:44,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:44,798 INFO L93 Difference]: Finished difference Result 5116 states and 8688 transitions. [2021-11-23 03:40:44,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:40:44,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-11-23 03:40:44,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:44,835 INFO L225 Difference]: With dead ends: 5116 [2021-11-23 03:40:44,835 INFO L226 Difference]: Without dead ends: 3408 [2021-11-23 03:40:44,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:44,850 INFO L933 BasicCegarLoop]: 1522 mSDtfsCounter, 1445 mSDsluCounter, 1457 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1445 SdHoareTripleChecker+Valid, 2859 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:44,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1445 Valid, 2859 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:40:44,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2021-11-23 03:40:45,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 3395. [2021-11-23 03:40:45,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3395 states, 2608 states have (on average 1.6733128834355828) internal successors, (4364), 2613 states have internal predecessors, (4364), 706 states have call successors, (706), 81 states have call predecessors, (706), 80 states have return successors, (700), 700 states have call predecessors, (700), 700 states have call successors, (700) [2021-11-23 03:40:45,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3395 states to 3395 states and 5770 transitions. [2021-11-23 03:40:45,066 INFO L78 Accepts]: Start accepts. Automaton has 3395 states and 5770 transitions. Word has length 30 [2021-11-23 03:40:45,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:45,066 INFO L470 AbstractCegarLoop]: Abstraction has 3395 states and 5770 transitions. [2021-11-23 03:40:45,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:40:45,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3395 states and 5770 transitions. [2021-11-23 03:40:45,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 03:40:45,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:45,069 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:45,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:40:45,070 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:40:45,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:45,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1371281817, now seen corresponding path program 1 times [2021-11-23 03:40:45,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:45,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579491585] [2021-11-23 03:40:45,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:45,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:45,426 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:45,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579491585] [2021-11-23 03:40:45,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579491585] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:45,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:45,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:40:45,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887818021] [2021-11-23 03:40:45,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:45,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:40:45,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:45,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:40:45,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:45,429 INFO L87 Difference]: Start difference. First operand 3395 states and 5770 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:40:46,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:46,286 INFO L93 Difference]: Finished difference Result 10150 states and 17250 transitions. [2021-11-23 03:40:46,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:40:46,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2021-11-23 03:40:46,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:46,352 INFO L225 Difference]: With dead ends: 10150 [2021-11-23 03:40:46,352 INFO L226 Difference]: Without dead ends: 6756 [2021-11-23 03:40:46,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:46,378 INFO L933 BasicCegarLoop]: 1527 mSDtfsCounter, 1437 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1437 SdHoareTripleChecker+Valid, 2861 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:46,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1437 Valid, 2861 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:40:46,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6756 states. [2021-11-23 03:40:46,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6756 to 6743. [2021-11-23 03:40:46,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6743 states, 5184 states have (on average 1.6728395061728396) internal successors, (8672), 5189 states have internal predecessors, (8672), 1398 states have call successors, (1398), 161 states have call predecessors, (1398), 160 states have return successors, (1392), 1392 states have call predecessors, (1392), 1392 states have call successors, (1392) [2021-11-23 03:40:46,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6743 states to 6743 states and 11462 transitions. [2021-11-23 03:40:46,888 INFO L78 Accepts]: Start accepts. Automaton has 6743 states and 11462 transitions. Word has length 34 [2021-11-23 03:40:46,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:46,888 INFO L470 AbstractCegarLoop]: Abstraction has 6743 states and 11462 transitions. [2021-11-23 03:40:46,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:40:46,889 INFO L276 IsEmpty]: Start isEmpty. Operand 6743 states and 11462 transitions. [2021-11-23 03:40:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 03:40:46,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:46,891 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1] [2021-11-23 03:40:46,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:40:46,892 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:40:46,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:46,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1366270253, now seen corresponding path program 1 times [2021-11-23 03:40:46,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:46,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285860849] [2021-11-23 03:40:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:46,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:47,241 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:47,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285860849] [2021-11-23 03:40:47,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285860849] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:47,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:47,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:40:47,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694026528] [2021-11-23 03:40:47,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:47,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:40:47,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:47,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:40:47,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:47,245 INFO L87 Difference]: Start difference. First operand 6743 states and 11462 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:40:49,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:49,008 INFO L93 Difference]: Finished difference Result 20162 states and 34270 transitions. [2021-11-23 03:40:49,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:40:49,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-11-23 03:40:49,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:49,157 INFO L225 Difference]: With dead ends: 20162 [2021-11-23 03:40:49,157 INFO L226 Difference]: Without dead ends: 13420 [2021-11-23 03:40:49,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:49,215 INFO L933 BasicCegarLoop]: 1539 mSDtfsCounter, 1443 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1443 SdHoareTripleChecker+Valid, 2873 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:49,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1443 Valid, 2873 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 03:40:49,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13420 states. [2021-11-23 03:40:50,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13420 to 13407. [2021-11-23 03:40:50,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13407 states, 10312 states have (on average 1.6722265321955003) internal successors, (17244), 10317 states have internal predecessors, (17244), 2774 states have call successors, (2774), 321 states have call predecessors, (2774), 320 states have return successors, (2768), 2768 states have call predecessors, (2768), 2768 states have call successors, (2768) [2021-11-23 03:40:50,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13407 states to 13407 states and 22786 transitions. [2021-11-23 03:40:50,279 INFO L78 Accepts]: Start accepts. Automaton has 13407 states and 22786 transitions. Word has length 28 [2021-11-23 03:40:50,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:50,279 INFO L470 AbstractCegarLoop]: Abstraction has 13407 states and 22786 transitions. [2021-11-23 03:40:50,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:40:50,287 INFO L276 IsEmpty]: Start isEmpty. Operand 13407 states and 22786 transitions. [2021-11-23 03:40:50,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 03:40:50,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:50,292 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:50,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:40:50,293 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:40:50,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:50,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1496062884, now seen corresponding path program 1 times [2021-11-23 03:40:50,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:50,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566286323] [2021-11-23 03:40:50,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:50,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:50,724 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:50,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566286323] [2021-11-23 03:40:50,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566286323] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:50,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:50,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:40:50,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174198565] [2021-11-23 03:40:50,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:50,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:40:50,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:50,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:40:50,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:50,727 INFO L87 Difference]: Start difference. First operand 13407 states and 22786 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:40:52,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:52,154 INFO L93 Difference]: Finished difference Result 40090 states and 68130 transitions. [2021-11-23 03:40:52,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:40:52,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-11-23 03:40:52,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:52,311 INFO L225 Difference]: With dead ends: 40090 [2021-11-23 03:40:52,311 INFO L226 Difference]: Without dead ends: 26684 [2021-11-23 03:40:52,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:52,389 INFO L933 BasicCegarLoop]: 1551 mSDtfsCounter, 1440 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1440 SdHoareTripleChecker+Valid, 2885 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:52,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1440 Valid, 2885 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:40:52,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26684 states. [2021-11-23 03:40:53,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26684 to 26671. [2021-11-23 03:40:53,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26671 states, 20520 states have (on average 1.6715399610136452) internal successors, (34300), 20525 states have internal predecessors, (34300), 5510 states have call successors, (5510), 641 states have call predecessors, (5510), 640 states have return successors, (5504), 5504 states have call predecessors, (5504), 5504 states have call successors, (5504) [2021-11-23 03:40:54,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26671 states to 26671 states and 45314 transitions. [2021-11-23 03:40:54,307 INFO L78 Accepts]: Start accepts. Automaton has 26671 states and 45314 transitions. Word has length 31 [2021-11-23 03:40:54,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:54,307 INFO L470 AbstractCegarLoop]: Abstraction has 26671 states and 45314 transitions. [2021-11-23 03:40:54,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:40:54,308 INFO L276 IsEmpty]: Start isEmpty. Operand 26671 states and 45314 transitions. [2021-11-23 03:40:54,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 03:40:54,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:54,310 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1] [2021-11-23 03:40:54,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:40:54,311 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:40:54,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:54,312 INFO L85 PathProgramCache]: Analyzing trace with hash 897913431, now seen corresponding path program 1 times [2021-11-23 03:40:54,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:54,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128298876] [2021-11-23 03:40:54,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:54,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:54,646 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:54,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128298876] [2021-11-23 03:40:54,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128298876] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:54,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:54,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:40:54,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361076206] [2021-11-23 03:40:54,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:54,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:40:54,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:54,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:40:54,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:54,649 INFO L87 Difference]: Start difference. First operand 26671 states and 45314 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:40:57,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:57,248 INFO L93 Difference]: Finished difference Result 79754 states and 135490 transitions. [2021-11-23 03:40:57,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:40:57,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-11-23 03:40:57,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:57,736 INFO L225 Difference]: With dead ends: 79754 [2021-11-23 03:40:57,737 INFO L226 Difference]: Without dead ends: 53084 [2021-11-23 03:40:57,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:57,850 INFO L933 BasicCegarLoop]: 1563 mSDtfsCounter, 1442 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1442 SdHoareTripleChecker+Valid, 2897 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:57,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1442 Valid, 2897 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:40:57,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53084 states. [2021-11-23 03:41:00,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53084 to 53071. [2021-11-23 03:41:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53071 states, 40840 states have (on average 1.6708129285014692) internal successors, (68236), 40845 states have internal predecessors, (68236), 10950 states have call successors, (10950), 1281 states have call predecessors, (10950), 1280 states have return successors, (10944), 10944 states have call predecessors, (10944), 10944 states have call successors, (10944) [2021-11-23 03:41:01,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53071 states to 53071 states and 90130 transitions. [2021-11-23 03:41:01,819 INFO L78 Accepts]: Start accepts. Automaton has 53071 states and 90130 transitions. Word has length 29 [2021-11-23 03:41:01,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:41:01,820 INFO L470 AbstractCegarLoop]: Abstraction has 53071 states and 90130 transitions. [2021-11-23 03:41:01,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:41:01,820 INFO L276 IsEmpty]: Start isEmpty. Operand 53071 states and 90130 transitions. [2021-11-23 03:41:01,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 03:41:01,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:41:01,823 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:41:01,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:41:01,824 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:41:01,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:41:01,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1705598365, now seen corresponding path program 1 times [2021-11-23 03:41:01,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:41:01,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120416736] [2021-11-23 03:41:01,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:41:01,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:41:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:41:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:41:02,145 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:41:02,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120416736] [2021-11-23 03:41:02,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120416736] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:41:02,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:41:02,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:41:02,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061319089] [2021-11-23 03:41:02,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:41:02,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:41:02,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:41:02,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:41:02,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:41:02,147 INFO L87 Difference]: Start difference. First operand 53071 states and 90130 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:41:06,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:41:06,108 INFO L93 Difference]: Finished difference Result 158698 states and 269490 transitions. [2021-11-23 03:41:06,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:41:06,116 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-11-23 03:41:06,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:41:06,867 INFO L225 Difference]: With dead ends: 158698 [2021-11-23 03:41:06,868 INFO L226 Difference]: Without dead ends: 105628 [2021-11-23 03:41:07,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:41:07,125 INFO L933 BasicCegarLoop]: 1575 mSDtfsCounter, 1436 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1436 SdHoareTripleChecker+Valid, 2909 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:41:07,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1436 Valid, 2909 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:41:07,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105628 states. [2021-11-23 03:41:12,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105628 to 105615. [2021-11-23 03:41:12,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105615 states, 81288 states have (on average 1.6700620017714791) internal successors, (135756), 81293 states have internal predecessors, (135756), 21766 states have call successors, (21766), 2561 states have call predecessors, (21766), 2560 states have return successors, (21760), 21760 states have call predecessors, (21760), 21760 states have call successors, (21760) [2021-11-23 03:41:13,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105615 states to 105615 states and 179282 transitions. [2021-11-23 03:41:13,607 INFO L78 Accepts]: Start accepts. Automaton has 105615 states and 179282 transitions. Word has length 35 [2021-11-23 03:41:13,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:41:13,610 INFO L470 AbstractCegarLoop]: Abstraction has 105615 states and 179282 transitions. [2021-11-23 03:41:13,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:41:13,610 INFO L276 IsEmpty]: Start isEmpty. Operand 105615 states and 179282 transitions. [2021-11-23 03:41:13,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 03:41:13,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:41:13,612 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1] [2021-11-23 03:41:13,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:41:13,612 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:41:13,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:41:13,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1993390792, now seen corresponding path program 1 times [2021-11-23 03:41:13,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:41:13,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374831739] [2021-11-23 03:41:13,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:41:13,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:41:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:41:13,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:41:13,903 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:41:13,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374831739] [2021-11-23 03:41:13,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374831739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:41:13,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:41:13,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:41:13,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762103300] [2021-11-23 03:41:13,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:41:13,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:41:13,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:41:13,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:41:13,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:41:13,906 INFO L87 Difference]: Start difference. First operand 105615 states and 179282 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:41:20,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:41:20,023 INFO L93 Difference]: Finished difference Result 315818 states and 536050 transitions. [2021-11-23 03:41:20,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:41:20,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-11-23 03:41:20,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:41:21,454 INFO L225 Difference]: With dead ends: 315818 [2021-11-23 03:41:21,455 INFO L226 Difference]: Without dead ends: 210204 [2021-11-23 03:41:21,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:41:21,884 INFO L933 BasicCegarLoop]: 1581 mSDtfsCounter, 1441 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1441 SdHoareTripleChecker+Valid, 2915 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:41:21,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1441 Valid, 2915 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:41:22,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210204 states. [2021-11-23 03:41:30,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210204 to 210191. [2021-11-23 03:41:30,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210191 states, 161800 states have (on average 1.6692954264524105) internal successors, (270092), 161805 states have internal predecessors, (270092), 43270 states have call successors, (43270), 5121 states have call predecessors, (43270), 5120 states have return successors, (43264), 43264 states have call predecessors, (43264), 43264 states have call successors, (43264) [2021-11-23 03:41:31,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210191 states to 210191 states and 356626 transitions. [2021-11-23 03:41:31,745 INFO L78 Accepts]: Start accepts. Automaton has 210191 states and 356626 transitions. Word has length 30 [2021-11-23 03:41:31,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:41:31,745 INFO L470 AbstractCegarLoop]: Abstraction has 210191 states and 356626 transitions. [2021-11-23 03:41:31,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:41:31,746 INFO L276 IsEmpty]: Start isEmpty. Operand 210191 states and 356626 transitions. [2021-11-23 03:41:31,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 03:41:31,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:41:31,749 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:41:31,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:41:31,750 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:41:31,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:41:31,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1768163544, now seen corresponding path program 1 times [2021-11-23 03:41:31,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:41:31,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397726570] [2021-11-23 03:41:31,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:41:31,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:41:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:41:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:41:32,752 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:41:32,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397726570] [2021-11-23 03:41:32,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397726570] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:41:32,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:41:32,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:41:32,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759940780] [2021-11-23 03:41:32,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:41:32,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:41:32,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:41:32,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:41:32,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:41:32,757 INFO L87 Difference]: Start difference. First operand 210191 states and 356626 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)