./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8517670-6c06-47c6-bf18-55d3b14e4154/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8517670-6c06-47c6-bf18-55d3b14e4154/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8517670-6c06-47c6-bf18-55d3b14e4154/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8517670-6c06-47c6-bf18-55d3b14e4154/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8517670-6c06-47c6-bf18-55d3b14e4154/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8517670-6c06-47c6-bf18-55d3b14e4154/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:13:14,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:13:14,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:13:14,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:13:14,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:13:14,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:13:14,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:13:14,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:13:14,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:13:14,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:13:14,318 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:13:14,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:13:14,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:13:14,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:13:14,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:13:14,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:13:14,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:13:14,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:13:14,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:13:14,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:13:14,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:13:14,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:13:14,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:13:14,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:13:14,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:13:14,364 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:13:14,365 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:13:14,367 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:13:14,368 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:13:14,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:13:14,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:13:14,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:13:14,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:13:14,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:13:14,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:13:14,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:13:14,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:13:14,381 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:13:14,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:13:14,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:13:14,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:13:14,384 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8517670-6c06-47c6-bf18-55d3b14e4154/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 19:13:14,439 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:13:14,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:13:14,440 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:13:14,441 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:13:14,442 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:13:14,442 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:13:14,442 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:13:14,443 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:13:14,443 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:13:14,443 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:13:14,444 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:13:14,445 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:13:14,445 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:13:14,445 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:13:14,446 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:13:14,446 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:13:14,446 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:13:14,446 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:13:14,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:13:14,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:13:14,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:13:14,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:13:14,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:13:14,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:13:14,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:13:14,449 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:13:14,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:13:14,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:13:14,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:13:14,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:13:14,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:13:14,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:13:14,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:13:14,453 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:13:14,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:13:14,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:13:14,454 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:13:14,454 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:13:14,454 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_f8517670-6c06-47c6-bf18-55d3b14e4154/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8517670-6c06-47c6-bf18-55d3b14e4154/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b [2021-11-25 19:13:14,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:13:14,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:13:14,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:13:14,901 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:13:14,902 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:13:14,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8517670-6c06-47c6-bf18-55d3b14e4154/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-25 19:13:14,982 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8517670-6c06-47c6-bf18-55d3b14e4154/bin/utaipan-eEHZpOm5b7/data/cbc79fb42/309ada100e1b4756946e0a30eeb07af6/FLAG2f8910813 [2021-11-25 19:13:16,068 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:13:16,070 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8517670-6c06-47c6-bf18-55d3b14e4154/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-25 19:13:16,125 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8517670-6c06-47c6-bf18-55d3b14e4154/bin/utaipan-eEHZpOm5b7/data/cbc79fb42/309ada100e1b4756946e0a30eeb07af6/FLAG2f8910813 [2021-11-25 19:13:16,521 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8517670-6c06-47c6-bf18-55d3b14e4154/bin/utaipan-eEHZpOm5b7/data/cbc79fb42/309ada100e1b4756946e0a30eeb07af6 [2021-11-25 19:13:16,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:13:16,526 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:13:16,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:13:16,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:13:16,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:13:16,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:13:16" (1/1) ... [2021-11-25 19:13:16,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65b09c75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:16, skipping insertion in model container [2021-11-25 19:13:16,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:13:16" (1/1) ... [2021-11-25 19:13:16,548 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:13:16,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:13:18,017 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_f8517670-6c06-47c6-bf18-55d3b14e4154/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-25 19:13:18,706 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:13:18,727 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:13:18,884 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_f8517670-6c06-47c6-bf18-55d3b14e4154/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-25 19:13:19,105 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:13:19,214 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:13:19,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:19 WrapperNode [2021-11-25 19:13:19,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:13:19,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:13:19,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:13:19,217 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:13:19,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:19" (1/1) ... [2021-11-25 19:13:19,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:19" (1/1) ... [2021-11-25 19:13:19,528 INFO L137 Inliner]: procedures = 180, calls = 578, calls flagged for inlining = 99, calls inlined = 93, statements flattened = 2364 [2021-11-25 19:13:19,529 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:13:19,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:13:19,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:13:19,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:13:19,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:19" (1/1) ... [2021-11-25 19:13:19,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:19" (1/1) ... [2021-11-25 19:13:19,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:19" (1/1) ... [2021-11-25 19:13:19,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:19" (1/1) ... [2021-11-25 19:13:19,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:19" (1/1) ... [2021-11-25 19:13:19,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:19" (1/1) ... [2021-11-25 19:13:19,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:19" (1/1) ... [2021-11-25 19:13:19,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:13:19,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:13:19,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:13:19,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:13:19,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:19" (1/1) ... [2021-11-25 19:13:19,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:13:19,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8517670-6c06-47c6-bf18-55d3b14e4154/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:13:19,801 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8517670-6c06-47c6-bf18-55d3b14e4154/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:13:19,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8517670-6c06-47c6-bf18-55d3b14e4154/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:13:19,861 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-25 19:13:19,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-25 19:13:19,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 19:13:19,862 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_async_push [2021-11-25 19:13:19,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_async_push [2021-11-25 19:13:19,863 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-25 19:13:19,863 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-25 19:13:19,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 19:13:19,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 19:13:19,863 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 19:13:19,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 19:13:19,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:13:19,864 INFO L130 BoogieDeclarations]: Found specification of procedure crc_ccitt_byte [2021-11-25 19:13:19,864 INFO L138 BoogieDeclarations]: Found implementation of procedure crc_ccitt_byte [2021-11-25 19:13:19,864 INFO L130 BoogieDeclarations]: Found specification of procedure ap_put [2021-11-25 19:13:19,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ap_put [2021-11-25 19:13:19,865 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_output_wakeup [2021-11-25 19:13:19,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_output_wakeup [2021-11-25 19:13:19,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-25 19:13:19,865 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-25 19:13:19,866 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2021-11-25 19:13:19,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2021-11-25 19:13:19,866 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 19:13:19,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 19:13:19,866 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_hangup [2021-11-25 19:13:19,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_hangup [2021-11-25 19:13:19,867 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-25 19:13:19,867 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-25 19:13:19,867 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2021-11-25 19:13:19,867 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2021-11-25 19:13:19,868 INFO L130 BoogieDeclarations]: Found specification of procedure get_unaligned_be16 [2021-11-25 19:13:19,868 INFO L138 BoogieDeclarations]: Found implementation of procedure get_unaligned_be16 [2021-11-25 19:13:19,868 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-11-25 19:13:19,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-11-25 19:13:19,869 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 19:13:19,869 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 19:13:19,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:13:19,870 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-25 19:13:19,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-25 19:13:19,870 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 19:13:19,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 19:13:19,870 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-25 19:13:19,871 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-25 19:13:19,871 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 19:13:19,871 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 19:13:19,871 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_close [2021-11-25 19:13:19,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_close [2021-11-25 19:13:19,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:13:19,873 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_poll [2021-11-25 19:13:19,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_poll [2021-11-25 19:13:19,875 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-25 19:13:19,875 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-25 19:13:19,875 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-25 19:13:19,876 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-25 19:13:19,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:13:19,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:13:19,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:13:19,878 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2021-11-25 19:13:19,878 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2021-11-25 19:13:19,879 INFO L130 BoogieDeclarations]: Found specification of procedure ap_get [2021-11-25 19:13:19,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ap_get [2021-11-25 19:13:19,880 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2021-11-25 19:13:19,880 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2021-11-25 19:13:19,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:13:19,880 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-11-25 19:13:19,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-11-25 19:13:19,881 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2021-11-25 19:13:19,881 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2021-11-25 19:13:19,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:13:19,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 19:13:19,881 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-25 19:13:19,882 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-25 19:13:19,883 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-25 19:13:19,883 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-25 19:13:19,883 INFO L130 BoogieDeclarations]: Found specification of procedure async_lcp_peek [2021-11-25 19:13:19,884 INFO L138 BoogieDeclarations]: Found implementation of procedure async_lcp_peek [2021-11-25 19:13:19,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:13:19,884 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2021-11-25 19:13:19,884 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2021-11-25 19:13:19,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 19:13:19,885 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-25 19:13:19,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-25 19:13:19,885 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-25 19:13:19,886 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-25 19:13:19,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:13:19,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:13:19,887 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_ioctl [2021-11-25 19:13:19,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_ioctl [2021-11-25 19:13:19,887 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2021-11-25 19:13:19,888 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2021-11-25 19:13:20,556 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:13:20,559 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:13:21,022 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 19:13:24,658 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:13:25,690 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:13:25,690 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 19:13:25,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:13:25 BoogieIcfgContainer [2021-11-25 19:13:25,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:13:25,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:13:25,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:13:25,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:13:25,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:13:16" (1/3) ... [2021-11-25 19:13:25,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aae1514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:13:25, skipping insertion in model container [2021-11-25 19:13:25,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:19" (2/3) ... [2021-11-25 19:13:25,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aae1514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:13:25, skipping insertion in model container [2021-11-25 19:13:25,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:13:25" (3/3) ... [2021-11-25 19:13:25,710 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-25 19:13:25,718 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:13:25,718 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:13:25,801 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:13:25,822 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:13:25,822 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:13:25,877 INFO L276 IsEmpty]: Start isEmpty. Operand has 474 states, 320 states have (on average 1.440625) internal successors, (461), 334 states have internal predecessors, (461), 116 states have call successors, (116), 37 states have call predecessors, (116), 36 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-25 19:13:25,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 19:13:25,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:13:25,900 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:13:25,901 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:13:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:13:25,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1776235691, now seen corresponding path program 1 times [2021-11-25 19:13:25,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:13:25,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718462701] [2021-11-25 19:13:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:13:25,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:13:26,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:13:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-25 19:13:26,503 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:13:26,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718462701] [2021-11-25 19:13:26,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718462701] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:13:26,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:13:26,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:13:26,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080560971] [2021-11-25 19:13:26,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:13:26,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:13:26,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:13:26,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:13:26,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:13:26,558 INFO L87 Difference]: Start difference. First operand has 474 states, 320 states have (on average 1.440625) internal successors, (461), 334 states have internal predecessors, (461), 116 states have call successors, (116), 37 states have call predecessors, (116), 36 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-25 19:13:29,789 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:13:30,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:13:30,025 INFO L93 Difference]: Finished difference Result 1364 states and 2015 transitions. [2021-11-25 19:13:30,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:13:30,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 71 [2021-11-25 19:13:30,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:13:30,057 INFO L225 Difference]: With dead ends: 1364 [2021-11-25 19:13:30,057 INFO L226 Difference]: Without dead ends: 899 [2021-11-25 19:13:30,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:13:30,079 INFO L933 BasicCegarLoop]: 678 mSDtfsCounter, 626 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:13:30,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 1248 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 220 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2021-11-25 19:13:30,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-11-25 19:13:30,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 898. [2021-11-25 19:13:30,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 617 states have (on average 1.4197730956239871) internal successors, (876), 633 states have internal predecessors, (876), 210 states have call successors, (210), 71 states have call predecessors, (210), 70 states have return successors, (209), 208 states have call predecessors, (209), 209 states have call successors, (209) [2021-11-25 19:13:30,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1295 transitions. [2021-11-25 19:13:30,266 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1295 transitions. Word has length 71 [2021-11-25 19:13:30,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:13:30,267 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1295 transitions. [2021-11-25 19:13:30,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-25 19:13:30,268 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1295 transitions. [2021-11-25 19:13:30,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 19:13:30,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:13:30,274 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:13:30,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:13:30,275 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:13:30,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:13:30,276 INFO L85 PathProgramCache]: Analyzing trace with hash -626052893, now seen corresponding path program 1 times [2021-11-25 19:13:30,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:13:30,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531386940] [2021-11-25 19:13:30,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:13:30,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:13:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:13:30,502 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-25 19:13:30,503 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:13:30,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531386940] [2021-11-25 19:13:30,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531386940] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:13:30,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:13:30,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:13:30,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444573747] [2021-11-25 19:13:30,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:13:30,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:13:30,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:13:30,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:13:30,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:13:30,508 INFO L87 Difference]: Start difference. First operand 898 states and 1295 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-25 19:13:34,102 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:13:34,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:13:34,164 INFO L93 Difference]: Finished difference Result 1773 states and 2585 transitions. [2021-11-25 19:13:34,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:13:34,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 74 [2021-11-25 19:13:34,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:13:34,185 INFO L225 Difference]: With dead ends: 1773 [2021-11-25 19:13:34,185 INFO L226 Difference]: Without dead ends: 1768 [2021-11-25 19:13:34,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:13:34,189 INFO L933 BasicCegarLoop]: 670 mSDtfsCounter, 652 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 1888 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:13:34,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [652 Valid, 1888 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 334 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-11-25 19:13:34,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-11-25 19:13:34,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1759. [2021-11-25 19:13:34,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 1210 states have (on average 1.4231404958677687) internal successors, (1722), 1242 states have internal predecessors, (1722), 408 states have call successors, (408), 141 states have call predecessors, (408), 140 states have return successors, (437), 404 states have call predecessors, (437), 407 states have call successors, (437) [2021-11-25 19:13:34,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 2567 transitions. [2021-11-25 19:13:34,403 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 2567 transitions. Word has length 74 [2021-11-25 19:13:34,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:13:34,404 INFO L470 AbstractCegarLoop]: Abstraction has 1759 states and 2567 transitions. [2021-11-25 19:13:34,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-25 19:13:34,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 2567 transitions. [2021-11-25 19:13:34,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-25 19:13:34,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:13:34,415 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:13:34,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:13:34,415 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:13:34,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:13:34,416 INFO L85 PathProgramCache]: Analyzing trace with hash -167910529, now seen corresponding path program 1 times [2021-11-25 19:13:34,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:13:34,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691345988] [2021-11-25 19:13:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:13:34,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:13:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:13:34,652 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-25 19:13:34,652 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:13:34,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691345988] [2021-11-25 19:13:34,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691345988] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:13:34,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:13:34,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:13:34,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287411967] [2021-11-25 19:13:34,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:13:34,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:13:34,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:13:34,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:13:34,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:13:34,656 INFO L87 Difference]: Start difference. First operand 1759 states and 2567 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 19:13:38,094 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:13:38,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:13:38,119 INFO L93 Difference]: Finished difference Result 4344 states and 6311 transitions. [2021-11-25 19:13:38,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:13:38,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 114 [2021-11-25 19:13:38,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:13:38,146 INFO L225 Difference]: With dead ends: 4344 [2021-11-25 19:13:38,147 INFO L226 Difference]: Without dead ends: 2606 [2021-11-25 19:13:38,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:13:38,157 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 339 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:13:38,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 1122 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 240 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2021-11-25 19:13:38,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-11-25 19:13:38,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 2599. [2021-11-25 19:13:38,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2599 states, 1794 states have (on average 1.4169453734671127) internal successors, (2542), 1836 states have internal predecessors, (2542), 592 states have call successors, (592), 213 states have call predecessors, (592), 212 states have return successors, (631), 586 states have call predecessors, (631), 591 states have call successors, (631) [2021-11-25 19:13:38,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 3765 transitions. [2021-11-25 19:13:38,407 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 3765 transitions. Word has length 114 [2021-11-25 19:13:38,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:13:38,408 INFO L470 AbstractCegarLoop]: Abstraction has 2599 states and 3765 transitions. [2021-11-25 19:13:38,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 19:13:38,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 3765 transitions. [2021-11-25 19:13:38,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-25 19:13:38,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:13:38,422 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:13:38,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:13:38,422 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:13:38,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:13:38,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1732334894, now seen corresponding path program 1 times [2021-11-25 19:13:38,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:13:38,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236241577] [2021-11-25 19:13:38,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:13:38,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:13:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:13:38,571 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-11-25 19:13:38,572 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:13:38,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236241577] [2021-11-25 19:13:38,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236241577] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:13:38,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:13:38,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:13:38,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295492078] [2021-11-25 19:13:38,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:13:38,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:13:38,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:13:38,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:13:38,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:13:38,576 INFO L87 Difference]: Start difference. First operand 2599 states and 3765 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 19:13:42,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:13:42,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:13:42,936 INFO L93 Difference]: Finished difference Result 6435 states and 9288 transitions. [2021-11-25 19:13:42,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:13:42,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 146 [2021-11-25 19:13:42,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:13:42,981 INFO L225 Difference]: With dead ends: 6435 [2021-11-25 19:13:42,981 INFO L226 Difference]: Without dead ends: 3857 [2021-11-25 19:13:42,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:13:43,003 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 448 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:13:43,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 1390 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-11-25 19:13:43,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3857 states. [2021-11-25 19:13:43,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3857 to 3851. [2021-11-25 19:13:43,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3851 states, 2695 states have (on average 1.4241187384044527) internal successors, (3838), 2761 states have internal predecessors, (3838), 821 states have call successors, (821), 335 states have call predecessors, (821), 334 states have return successors, (882), 811 states have call predecessors, (882), 820 states have call successors, (882) [2021-11-25 19:13:43,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3851 states to 3851 states and 5541 transitions. [2021-11-25 19:13:43,399 INFO L78 Accepts]: Start accepts. Automaton has 3851 states and 5541 transitions. Word has length 146 [2021-11-25 19:13:43,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:13:43,400 INFO L470 AbstractCegarLoop]: Abstraction has 3851 states and 5541 transitions. [2021-11-25 19:13:43,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 19:13:43,401 INFO L276 IsEmpty]: Start isEmpty. Operand 3851 states and 5541 transitions. [2021-11-25 19:13:43,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-25 19:13:43,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:13:43,413 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:13:43,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:13:43,414 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:13:43,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:13:43,418 INFO L85 PathProgramCache]: Analyzing trace with hash 13898737, now seen corresponding path program 1 times [2021-11-25 19:13:43,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:13:43,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718764620] [2021-11-25 19:13:43,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:13:43,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:13:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:13:43,572 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-11-25 19:13:43,573 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:13:43,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718764620] [2021-11-25 19:13:43,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718764620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:13:43,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:13:43,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:13:43,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240987974] [2021-11-25 19:13:43,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:13:43,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:13:43,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:13:43,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:13:43,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:13:43,576 INFO L87 Difference]: Start difference. First operand 3851 states and 5541 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 19:13:46,638 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:13:46,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:13:46,652 INFO L93 Difference]: Finished difference Result 9392 states and 13441 transitions. [2021-11-25 19:13:46,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:13:46,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 141 [2021-11-25 19:13:46,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:13:46,729 INFO L225 Difference]: With dead ends: 9392 [2021-11-25 19:13:46,730 INFO L226 Difference]: Without dead ends: 5570 [2021-11-25 19:13:46,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:13:46,748 INFO L933 BasicCegarLoop]: 655 mSDtfsCounter, 447 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:13:46,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 1161 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 246 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 19:13:46,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5570 states. [2021-11-25 19:13:47,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5570 to 5463. [2021-11-25 19:13:47,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5463 states, 3849 states have (on average 1.408677578591842) internal successors, (5422), 3934 states have internal predecessors, (5422), 1103 states have call successors, (1103), 511 states have call predecessors, (1103), 510 states have return successors, (1192), 1098 states have call predecessors, (1192), 1102 states have call successors, (1192) [2021-11-25 19:13:47,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5463 states to 5463 states and 7717 transitions. [2021-11-25 19:13:47,186 INFO L78 Accepts]: Start accepts. Automaton has 5463 states and 7717 transitions. Word has length 141 [2021-11-25 19:13:47,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:13:47,187 INFO L470 AbstractCegarLoop]: Abstraction has 5463 states and 7717 transitions. [2021-11-25 19:13:47,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 19:13:47,190 INFO L276 IsEmpty]: Start isEmpty. Operand 5463 states and 7717 transitions. [2021-11-25 19:13:47,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-25 19:13:47,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:13:47,208 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:13:47,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:13:47,208 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:13:47,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:13:47,210 INFO L85 PathProgramCache]: Analyzing trace with hash 820773215, now seen corresponding path program 1 times [2021-11-25 19:13:47,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:13:47,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860830473] [2021-11-25 19:13:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:13:47,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:13:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:13:47,530 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2021-11-25 19:13:47,531 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:13:47,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860830473] [2021-11-25 19:13:47,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860830473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:13:47,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:13:47,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:13:47,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226463603] [2021-11-25 19:13:47,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:13:47,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:13:47,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:13:47,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:13:47,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:13:47,534 INFO L87 Difference]: Start difference. First operand 5463 states and 7717 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 19:13:51,519 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:13:51,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:13:51,682 INFO L93 Difference]: Finished difference Result 8208 states and 11643 transitions. [2021-11-25 19:13:51,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:13:51,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 135 [2021-11-25 19:13:51,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:13:51,757 INFO L225 Difference]: With dead ends: 8208 [2021-11-25 19:13:51,757 INFO L226 Difference]: Without dead ends: 8203 [2021-11-25 19:13:51,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:13:51,765 INFO L933 BasicCegarLoop]: 670 mSDtfsCounter, 625 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 1888 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:13:51,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 1888 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 333 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2021-11-25 19:13:51,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8203 states. [2021-11-25 19:13:52,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8203 to 8169. [2021-11-25 19:13:52,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8169 states, 5751 states have (on average 1.4082768214223613) internal successors, (8099), 5879 states have internal predecessors, (8099), 1652 states have call successors, (1652), 766 states have call predecessors, (1652), 765 states have return successors, (1831), 1645 states have call predecessors, (1831), 1651 states have call successors, (1831) [2021-11-25 19:13:52,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8169 states to 8169 states and 11582 transitions. [2021-11-25 19:13:52,373 INFO L78 Accepts]: Start accepts. Automaton has 8169 states and 11582 transitions. Word has length 135 [2021-11-25 19:13:52,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:13:52,375 INFO L470 AbstractCegarLoop]: Abstraction has 8169 states and 11582 transitions. [2021-11-25 19:13:52,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 19:13:52,376 INFO L276 IsEmpty]: Start isEmpty. Operand 8169 states and 11582 transitions. [2021-11-25 19:13:52,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-25 19:13:52,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:13:52,392 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:13:52,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:13:52,392 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:13:52,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:13:52,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1003380476, now seen corresponding path program 1 times [2021-11-25 19:13:52,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:13:52,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387856241] [2021-11-25 19:13:52,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:13:52,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:13:52,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:13:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-25 19:13:52,537 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:13:52,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387856241] [2021-11-25 19:13:52,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387856241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:13:52,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:13:52,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:13:52,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680041426] [2021-11-25 19:13:52,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:13:52,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:13:52,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:13:52,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:13:52,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:13:52,541 INFO L87 Difference]: Start difference. First operand 8169 states and 11582 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 19:13:55,621 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:13:55,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:13:55,690 INFO L93 Difference]: Finished difference Result 10964 states and 15756 transitions. [2021-11-25 19:13:55,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:13:55,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 145 [2021-11-25 19:13:55,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:13:55,776 INFO L225 Difference]: With dead ends: 10964 [2021-11-25 19:13:55,776 INFO L226 Difference]: Without dead ends: 8219 [2021-11-25 19:13:55,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:13:55,797 INFO L933 BasicCegarLoop]: 566 mSDtfsCounter, 4 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:13:55,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1126 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-25 19:13:55,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8219 states. [2021-11-25 19:13:56,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8219 to 8219. [2021-11-25 19:13:56,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8219 states, 5791 states have (on average 1.4054567432222413) internal successors, (8139), 5929 states have internal predecessors, (8139), 1652 states have call successors, (1652), 766 states have call predecessors, (1652), 775 states have return successors, (1841), 1645 states have call predecessors, (1841), 1651 states have call successors, (1841) [2021-11-25 19:13:56,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8219 states to 8219 states and 11632 transitions. [2021-11-25 19:13:56,343 INFO L78 Accepts]: Start accepts. Automaton has 8219 states and 11632 transitions. Word has length 145 [2021-11-25 19:13:56,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:13:56,344 INFO L470 AbstractCegarLoop]: Abstraction has 8219 states and 11632 transitions. [2021-11-25 19:13:56,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 19:13:56,345 INFO L276 IsEmpty]: Start isEmpty. Operand 8219 states and 11632 transitions. [2021-11-25 19:13:56,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-25 19:13:56,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:13:56,360 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:13:56,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 19:13:56,361 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:13:56,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:13:56,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1671533302, now seen corresponding path program 1 times [2021-11-25 19:13:56,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:13:56,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413749567] [2021-11-25 19:13:56,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:13:56,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:13:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:13:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-25 19:13:56,761 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:13:56,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413749567] [2021-11-25 19:13:56,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413749567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:13:56,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741641518] [2021-11-25 19:13:56,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:13:56,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:13:56,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8517670-6c06-47c6-bf18-55d3b14e4154/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:13:56,764 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8517670-6c06-47c6-bf18-55d3b14e4154/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:13:56,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8517670-6c06-47c6-bf18-55d3b14e4154/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:13:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:13:57,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 19:13:57,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:13:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 89 proven. 5 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-11-25 19:13:57,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:13:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-25 19:13:59,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741641518] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:13:59,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [706159057] [2021-11-25 19:13:59,718 INFO L159 IcfgInterpreter]: Started Sifa with 86 locations of interest [2021-11-25 19:13:59,718 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:13:59,726 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:13:59,732 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:13:59,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:14:00,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 195 [2021-11-25 19:14:00,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 195 [2021-11-25 19:14:00,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:00,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:00,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:00,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:00,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:00,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:00,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:00,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:00,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:00,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:00,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:00,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:00,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:00,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:00,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:00,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:00,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:00,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:00,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:00,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:00,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:00,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 33 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 49 [2021-11-25 19:14:01,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:01,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:01,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:01,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:01,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:01,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:01,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:01,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:01,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:01,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:01,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:01,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:01,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:01,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:01,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:01,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:01,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:01,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:01,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:01,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:01,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:14:01,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 33 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 49 [2021-11-25 19:14:14,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 19:14:14,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 19:14:14,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1