./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P --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 6063bfeeaa4a025ac67d1a7a9b5cc20b489e34fc9db0d4dd9fcdda86c75b9c5e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:48:38,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:48:38,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:48:38,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:48:38,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:48:38,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:48:38,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:48:38,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:48:38,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:48:38,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:48:38,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:48:38,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:48:38,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:48:38,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:48:38,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:48:38,661 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:48:38,662 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:48:38,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:48:38,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:48:38,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:48:38,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:48:38,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:48:38,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:48:38,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:48:38,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:48:38,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:48:38,679 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:48:38,680 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:48:38,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:48:38,682 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:48:38,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:48:38,683 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:48:38,684 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:48:38,685 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:48:38,686 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:48:38,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:48:38,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:48:38,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:48:38,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:48:38,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:48:38,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:48:38,691 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 22:48:38,717 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:48:38,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:48:38,718 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:48:38,719 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:48:38,720 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:48:38,720 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:48:38,721 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:48:38,721 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:48:38,721 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:48:38,722 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 22:48:38,722 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:48:38,723 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:48:38,723 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 22:48:38,723 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 22:48:38,724 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:48:38,724 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 22:48:38,725 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 22:48:38,725 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 22:48:38,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:48:38,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:48:38,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:48:38,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 22:48:38,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:48:38,727 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 22:48:38,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 22:48:38,727 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:48:38,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 22:48:38,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:48:38,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:48:38,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:48:38,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:48:38,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:48:38,729 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 22:48:38,730 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 22:48:38,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 22:48:38,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 22:48:38,730 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:48:38,730 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:48:38,731 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_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6063bfeeaa4a025ac67d1a7a9b5cc20b489e34fc9db0d4dd9fcdda86c75b9c5e [2021-11-20 22:48:39,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:48:39,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:48:39,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:48:39,059 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:48:39,060 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:48:39,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i [2021-11-20 22:48:39,146 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/data/acff5ceb8/7d02def79311488eae0acbe008175ee1/FLAG20f4f0182 [2021-11-20 22:48:40,044 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:48:40,045 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i [2021-11-20 22:48:40,088 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/data/acff5ceb8/7d02def79311488eae0acbe008175ee1/FLAG20f4f0182 [2021-11-20 22:48:40,549 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/data/acff5ceb8/7d02def79311488eae0acbe008175ee1 [2021-11-20 22:48:40,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:48:40,554 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:48:40,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:48:40,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:48:40,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:48:40,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:48:40" (1/1) ... [2021-11-20 22:48:40,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@379cfa73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:40, skipping insertion in model container [2021-11-20 22:48:40,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:48:40" (1/1) ... [2021-11-20 22:48:40,575 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:48:40,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:48:41,398 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_0b129f63-1e61-4558-aa7d-c7ea274686c7/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i[139152,139165] [2021-11-20 22:48:42,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:48:42,349 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:48:42,470 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_0b129f63-1e61-4558-aa7d-c7ea274686c7/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i[139152,139165] [2021-11-20 22:48:42,695 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:48:42,825 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:48:42,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:42 WrapperNode [2021-11-20 22:48:42,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:48:42,826 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:48:42,827 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:48:42,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:48:42,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:42" (1/1) ... [2021-11-20 22:48:42,930 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:42" (1/1) ... [2021-11-20 22:48:43,045 INFO L137 Inliner]: procedures = 184, calls = 828, calls flagged for inlining = 92, calls inlined = 90, statements flattened = 3179 [2021-11-20 22:48:43,046 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:48:43,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:48:43,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:48:43,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:48:43,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:42" (1/1) ... [2021-11-20 22:48:43,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:42" (1/1) ... [2021-11-20 22:48:43,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:42" (1/1) ... [2021-11-20 22:48:43,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:42" (1/1) ... [2021-11-20 22:48:43,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:42" (1/1) ... [2021-11-20 22:48:43,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:42" (1/1) ... [2021-11-20 22:48:43,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:42" (1/1) ... [2021-11-20 22:48:43,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:48:43,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:48:43,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:48:43,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:48:43,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:42" (1/1) ... [2021-11-20 22:48:43,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:48:43,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:48:43,308 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:48:43,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:48:43,393 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_nonpositive [2021-11-20 22:48:43,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_nonpositive [2021-11-20 22:48:43,394 INFO L130 BoogieDeclarations]: Found specification of procedure sl_tx_timeout [2021-11-20 22:48:43,394 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_tx_timeout [2021-11-20 22:48:43,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 22:48:43,394 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-20 22:48:43,394 INFO L130 BoogieDeclarations]: Found specification of procedure activate_pending_timer_1 [2021-11-20 22:48:43,395 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_pending_timer_1 [2021-11-20 22:48:43,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 22:48:43,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 22:48:43,395 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-20 22:48:43,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-20 22:48:43,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 22:48:43,395 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-20 22:48:43,396 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-20 22:48:43,396 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2021-11-20 22:48:43,396 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2021-11-20 22:48:43,396 INFO L130 BoogieDeclarations]: Found specification of procedure slhc_free [2021-11-20 22:48:43,396 INFO L138 BoogieDeclarations]: Found implementation of procedure slhc_free [2021-11-20 22:48:43,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-20 22:48:43,396 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-20 22:48:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-20 22:48:43,397 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-20 22:48:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 22:48:43,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 22:48:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-20 22:48:43,397 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-20 22:48:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2021-11-20 22:48:43,398 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2021-11-20 22:48:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-20 22:48:43,398 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-20 22:48:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure sl_free_bufs [2021-11-20 22:48:43,399 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_free_bufs [2021-11-20 22:48:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 22:48:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-20 22:48:43,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-20 22:48:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-20 22:48:43,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-20 22:48:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-20 22:48:43,400 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-20 22:48:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 22:48:43,400 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 22:48:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-20 22:48:43,400 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-20 22:48:43,401 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2021-11-20 22:48:43,401 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2021-11-20 22:48:43,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 22:48:43,401 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_1 [2021-11-20 22:48:43,402 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_1 [2021-11-20 22:48:43,402 INFO L130 BoogieDeclarations]: Found specification of procedure sl_bump [2021-11-20 22:48:43,403 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_bump [2021-11-20 22:48:43,403 INFO L130 BoogieDeclarations]: Found specification of procedure slip_ioctl [2021-11-20 22:48:43,404 INFO L138 BoogieDeclarations]: Found implementation of procedure slip_ioctl [2021-11-20 22:48:43,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:48:43,404 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-20 22:48:43,404 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-20 22:48:43,404 INFO L130 BoogieDeclarations]: Found specification of procedure slip_close [2021-11-20 22:48:43,404 INFO L138 BoogieDeclarations]: Found implementation of procedure slip_close [2021-11-20 22:48:43,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 22:48:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 22:48:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-20 22:48:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2021-11-20 22:48:43,405 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2021-11-20 22:48:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure slip_compat_ioctl [2021-11-20 22:48:43,405 INFO L138 BoogieDeclarations]: Found implementation of procedure slip_compat_ioctl [2021-11-20 22:48:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-20 22:48:43,406 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-20 22:48:43,406 INFO L130 BoogieDeclarations]: Found specification of procedure sl_get_stats64 [2021-11-20 22:48:43,406 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_get_stats64 [2021-11-20 22:48:43,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 22:48:43,406 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-20 22:48:43,406 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-20 22:48:43,407 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-20 22:48:43,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-20 22:48:43,407 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-20 22:48:43,407 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-20 22:48:43,408 INFO L130 BoogieDeclarations]: Found specification of procedure sl_ioctl [2021-11-20 22:48:43,408 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_ioctl [2021-11-20 22:48:43,408 INFO L130 BoogieDeclarations]: Found specification of procedure tty_hangup [2021-11-20 22:48:43,408 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_hangup [2021-11-20 22:48:43,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 22:48:43,408 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2021-11-20 22:48:43,408 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2021-11-20 22:48:43,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 22:48:43,409 INFO L130 BoogieDeclarations]: Found specification of procedure tty_devnum [2021-11-20 22:48:43,409 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_devnum [2021-11-20 22:48:43,410 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-20 22:48:43,410 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-20 22:48:43,410 INFO L130 BoogieDeclarations]: Found specification of procedure slip_hangup [2021-11-20 22:48:43,411 INFO L138 BoogieDeclarations]: Found implementation of procedure slip_hangup [2021-11-20 22:48:43,411 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-20 22:48:43,411 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-20 22:48:43,411 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-20 22:48:43,412 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-20 22:48:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure sl_change_mtu [2021-11-20 22:48:43,412 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_change_mtu [2021-11-20 22:48:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2021-11-20 22:48:43,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2021-11-20 22:48:43,413 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-20 22:48:43,413 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-20 22:48:43,413 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-20 22:48:43,413 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-20 22:48:43,413 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-20 22:48:43,413 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-20 22:48:43,414 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-20 22:48:43,414 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-20 22:48:43,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 22:48:43,414 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2021-11-20 22:48:43,414 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2021-11-20 22:48:43,415 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2021-11-20 22:48:43,415 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2021-11-20 22:48:43,416 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-11-20 22:48:43,418 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-11-20 22:48:43,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-20 22:48:43,418 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-20 22:48:43,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-20 22:48:43,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:48:43,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:48:43,421 INFO L130 BoogieDeclarations]: Found specification of procedure sl_unlock [2021-11-20 22:48:43,421 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_unlock [2021-11-20 22:48:43,421 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2021-11-20 22:48:43,427 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2021-11-20 22:48:44,054 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:48:44,058 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:48:44,299 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-20 22:48:46,746 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:48:47,719 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:48:47,719 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 22:48:47,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:48:47 BoogieIcfgContainer [2021-11-20 22:48:47,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:48:47,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:48:47,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:48:47,732 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:48:47,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:48:40" (1/3) ... [2021-11-20 22:48:47,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2e35db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:48:47, skipping insertion in model container [2021-11-20 22:48:47,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:42" (2/3) ... [2021-11-20 22:48:47,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2e35db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:48:47, skipping insertion in model container [2021-11-20 22:48:47,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:48:47" (3/3) ... [2021-11-20 22:48:47,736 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i [2021-11-20 22:48:47,744 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:48:47,744 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 22:48:47,810 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:48:47,822 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 [2021-11-20 22:48:47,822 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 22:48:47,874 INFO L276 IsEmpty]: Start isEmpty. Operand has 770 states, 488 states have (on average 1.4057377049180328) internal successors, (686), 521 states have internal predecessors, (686), 229 states have call successors, (229), 52 states have call predecessors, (229), 51 states have return successors, (224), 222 states have call predecessors, (224), 224 states have call successors, (224) [2021-11-20 22:48:47,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 22:48:47,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:47,901 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:48:47,902 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:47,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:47,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1674786566, now seen corresponding path program 1 times [2021-11-20 22:48:47,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:47,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852899181] [2021-11-20 22:48:47,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:47,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-20 22:48:48,432 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:48,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852899181] [2021-11-20 22:48:48,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852899181] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:48,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:48,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:48:48,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036936720] [2021-11-20 22:48:48,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:48,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:48:48,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:48,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:48:48,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:48:48,489 INFO L87 Difference]: Start difference. First operand has 770 states, 488 states have (on average 1.4057377049180328) internal successors, (686), 521 states have internal predecessors, (686), 229 states have call successors, (229), 52 states have call predecessors, (229), 51 states have return successors, (224), 222 states have call predecessors, (224), 224 states have call successors, (224) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 22:48:50,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:50,846 INFO L93 Difference]: Finished difference Result 1967 states and 2884 transitions. [2021-11-20 22:48:50,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:48:50,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 60 [2021-11-20 22:48:50,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:50,891 INFO L225 Difference]: With dead ends: 1967 [2021-11-20 22:48:50,891 INFO L226 Difference]: Without dead ends: 1150 [2021-11-20 22:48:50,906 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 [2021-11-20 22:48:50,919 INFO L933 BasicCegarLoop]: 1128 mSDtfsCounter, 641 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 2079 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:50,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 2079 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 22:48:50,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2021-11-20 22:48:51,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 1150. [2021-11-20 22:48:51,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 728 states have (on average 1.3736263736263736) internal successors, (1000), 761 states have internal predecessors, (1000), 333 states have call successors, (333), 89 states have call predecessors, (333), 88 states have return successors, (332), 329 states have call predecessors, (332), 332 states have call successors, (332) [2021-11-20 22:48:51,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1665 transitions. [2021-11-20 22:48:51,134 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1665 transitions. Word has length 60 [2021-11-20 22:48:51,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:51,135 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 1665 transitions. [2021-11-20 22:48:51,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 22:48:51,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1665 transitions. [2021-11-20 22:48:51,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-20 22:48:51,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:51,150 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-11-20 22:48:51,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 22:48:51,150 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:51,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:51,152 INFO L85 PathProgramCache]: Analyzing trace with hash 657136690, now seen corresponding path program 1 times [2021-11-20 22:48:51,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:51,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352827934] [2021-11-20 22:48:51,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:51,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-20 22:48:51,322 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:51,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352827934] [2021-11-20 22:48:51,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352827934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:51,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:51,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:48:51,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967219943] [2021-11-20 22:48:51,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:51,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:48:51,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:51,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:48:51,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:48:51,326 INFO L87 Difference]: Start difference. First operand 1150 states and 1665 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 22:48:53,469 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:48:54,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:54,174 INFO L93 Difference]: Finished difference Result 2283 states and 3305 transitions. [2021-11-20 22:48:54,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:48:54,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 94 [2021-11-20 22:48:54,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:54,188 INFO L225 Difference]: With dead ends: 2283 [2021-11-20 22:48:54,188 INFO L226 Difference]: Without dead ends: 1150 [2021-11-20 22:48:54,193 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 [2021-11-20 22:48:54,194 INFO L933 BasicCegarLoop]: 954 mSDtfsCounter, 1 mSDsluCounter, 2161 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2857 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:54,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 2857 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 397 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 22:48:54,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2021-11-20 22:48:54,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 1150. [2021-11-20 22:48:54,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 728 states have (on average 1.370879120879121) internal successors, (998), 761 states have internal predecessors, (998), 333 states have call successors, (333), 89 states have call predecessors, (333), 88 states have return successors, (332), 329 states have call predecessors, (332), 332 states have call successors, (332) [2021-11-20 22:48:54,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1663 transitions. [2021-11-20 22:48:54,320 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1663 transitions. Word has length 94 [2021-11-20 22:48:54,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:54,322 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 1663 transitions. [2021-11-20 22:48:54,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 22:48:54,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1663 transitions. [2021-11-20 22:48:54,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 22:48:54,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:54,330 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-11-20 22:48:54,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 22:48:54,331 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:54,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:54,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1149182895, now seen corresponding path program 1 times [2021-11-20 22:48:54,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:54,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465061861] [2021-11-20 22:48:54,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:54,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-20 22:48:54,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:54,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465061861] [2021-11-20 22:48:54,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465061861] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:54,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:54,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:48:54,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634405013] [2021-11-20 22:48:54,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:54,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:48:54,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:54,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:48:54,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:48:54,543 INFO L87 Difference]: Start difference. First operand 1150 states and 1663 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-20 22:48:56,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:56,679 INFO L93 Difference]: Finished difference Result 1627 states and 2443 transitions. [2021-11-20 22:48:56,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:48:56,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 96 [2021-11-20 22:48:56,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:56,694 INFO L225 Difference]: With dead ends: 1627 [2021-11-20 22:48:56,694 INFO L226 Difference]: Without dead ends: 1624 [2021-11-20 22:48:56,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:48:56,701 INFO L933 BasicCegarLoop]: 1404 mSDtfsCounter, 607 mSDsluCounter, 2449 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 3577 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:56,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [638 Valid, 3577 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 22:48:56,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2021-11-20 22:48:56,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1152. [2021-11-20 22:48:56,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 730 states have (on average 1.36986301369863) internal successors, (1000), 763 states have internal predecessors, (1000), 333 states have call successors, (333), 89 states have call predecessors, (333), 88 states have return successors, (332), 329 states have call predecessors, (332), 332 states have call successors, (332) [2021-11-20 22:48:56,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1665 transitions. [2021-11-20 22:48:56,788 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1665 transitions. Word has length 96 [2021-11-20 22:48:56,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:56,790 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 1665 transitions. [2021-11-20 22:48:56,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-20 22:48:56,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1665 transitions. [2021-11-20 22:48:56,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-20 22:48:56,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:56,799 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-11-20 22:48:56,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 22:48:56,800 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:56,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:56,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1598430312, now seen corresponding path program 1 times [2021-11-20 22:48:56,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:56,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047354827] [2021-11-20 22:48:56,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:56,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-20 22:48:57,023 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:57,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047354827] [2021-11-20 22:48:57,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047354827] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:57,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:57,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:48:57,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546318275] [2021-11-20 22:48:57,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:57,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:48:57,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:57,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:48:57,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:48:57,027 INFO L87 Difference]: Start difference. First operand 1152 states and 1665 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-20 22:48:59,723 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:49:01,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:49:01,192 INFO L93 Difference]: Finished difference Result 2758 states and 4080 transitions. [2021-11-20 22:49:01,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:49:01,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 104 [2021-11-20 22:49:01,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:49:01,207 INFO L225 Difference]: With dead ends: 2758 [2021-11-20 22:49:01,208 INFO L226 Difference]: Without dead ends: 1627 [2021-11-20 22:49:01,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:49:01,216 INFO L933 BasicCegarLoop]: 1247 mSDtfsCounter, 1565 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1666 SdHoareTripleChecker+Valid, 1764 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:49:01,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1666 Valid, 1764 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 894 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2021-11-20 22:49:01,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-11-20 22:49:01,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1153. [2021-11-20 22:49:01,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 731 states have (on average 1.3693570451436388) internal successors, (1001), 764 states have internal predecessors, (1001), 333 states have call successors, (333), 89 states have call predecessors, (333), 88 states have return successors, (332), 329 states have call predecessors, (332), 332 states have call successors, (332) [2021-11-20 22:49:01,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1666 transitions. [2021-11-20 22:49:01,305 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1666 transitions. Word has length 104 [2021-11-20 22:49:01,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:49:01,306 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 1666 transitions. [2021-11-20 22:49:01,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-20 22:49:01,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1666 transitions. [2021-11-20 22:49:01,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-20 22:49:01,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:49:01,318 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-11-20 22:49:01,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 22:49:01,318 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:49:01,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:49:01,319 INFO L85 PathProgramCache]: Analyzing trace with hash 884025818, now seen corresponding path program 1 times [2021-11-20 22:49:01,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:49:01,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795610353] [2021-11-20 22:49:01,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:01,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:49:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:49:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-20 22:49:01,463 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:49:01,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795610353] [2021-11-20 22:49:01,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795610353] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:49:01,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:49:01,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:49:01,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694918975] [2021-11-20 22:49:01,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:49:01,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:49:01,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:49:01,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:49:01,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:49:01,466 INFO L87 Difference]: Start difference. First operand 1153 states and 1666 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-20 22:49:04,952 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:49:06,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:49:06,637 INFO L93 Difference]: Finished difference Result 2431 states and 3756 transitions. [2021-11-20 22:49:06,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 22:49:06,638 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 105 [2021-11-20 22:49:06,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:49:06,661 INFO L225 Difference]: With dead ends: 2431 [2021-11-20 22:49:06,661 INFO L226 Difference]: Without dead ends: 2428 [2021-11-20 22:49:06,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 22:49:06,664 INFO L933 BasicCegarLoop]: 1748 mSDtfsCounter, 1387 mSDsluCounter, 4653 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1491 SdHoareTripleChecker+Valid, 5928 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-20 22:49:06,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1491 Valid, 5928 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-20 22:49:06,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-11-20 22:49:06,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 1155. [2021-11-20 22:49:06,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 732 states have (on average 1.3688524590163935) internal successors, (1002), 764 states have internal predecessors, (1002), 334 states have call successors, (334), 89 states have call predecessors, (334), 88 states have return successors, (333), 330 states have call predecessors, (333), 333 states have call successors, (333) [2021-11-20 22:49:06,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1669 transitions. [2021-11-20 22:49:06,793 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1669 transitions. Word has length 105 [2021-11-20 22:49:06,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:49:06,794 INFO L470 AbstractCegarLoop]: Abstraction has 1155 states and 1669 transitions. [2021-11-20 22:49:06,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-20 22:49:06,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1669 transitions. [2021-11-20 22:49:06,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-20 22:49:06,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:49:06,804 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-11-20 22:49:06,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 22:49:06,805 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:49:06,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:49:06,806 INFO L85 PathProgramCache]: Analyzing trace with hash 173185866, now seen corresponding path program 1 times [2021-11-20 22:49:06,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:49:06,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687637133] [2021-11-20 22:49:06,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:06,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:49:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:49:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-20 22:49:06,940 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:49:06,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687637133] [2021-11-20 22:49:06,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687637133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:49:06,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:49:06,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:49:06,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808245938] [2021-11-20 22:49:06,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:49:06,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:49:06,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:49:06,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:49:06,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:49:06,943 INFO L87 Difference]: Start difference. First operand 1155 states and 1669 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 22:49:08,821 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:49:09,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:49:09,888 INFO L93 Difference]: Finished difference Result 2688 states and 3870 transitions. [2021-11-20 22:49:09,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:49:09,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 129 [2021-11-20 22:49:09,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:49:09,903 INFO L225 Difference]: With dead ends: 2688 [2021-11-20 22:49:09,903 INFO L226 Difference]: Without dead ends: 1554 [2021-11-20 22:49:09,908 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 [2021-11-20 22:49:09,909 INFO L933 BasicCegarLoop]: 1443 mSDtfsCounter, 1031 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 22:49:09,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1031 Valid, 1962 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 22:49:09,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2021-11-20 22:49:10,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1553. [2021-11-20 22:49:10,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1553 states, 979 states have (on average 1.3615934627170583) internal successors, (1333), 1020 states have internal predecessors, (1333), 448 states have call successors, (448), 126 states have call predecessors, (448), 125 states have return successors, (447), 442 states have call predecessors, (447), 447 states have call successors, (447) [2021-11-20 22:49:10,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 2228 transitions. [2021-11-20 22:49:10,040 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 2228 transitions. Word has length 129 [2021-11-20 22:49:10,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:49:10,041 INFO L470 AbstractCegarLoop]: Abstraction has 1553 states and 2228 transitions. [2021-11-20 22:49:10,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 22:49:10,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 2228 transitions. [2021-11-20 22:49:10,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-20 22:49:10,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:49:10,052 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-11-20 22:49:10,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 22:49:10,052 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:49:10,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:49:10,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1804121220, now seen corresponding path program 1 times [2021-11-20 22:49:10,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:49:10,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314920844] [2021-11-20 22:49:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:10,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:49:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:49:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-20 22:49:10,267 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:49:10,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314920844] [2021-11-20 22:49:10,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314920844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:49:10,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:49:10,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:49:10,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068489762] [2021-11-20 22:49:10,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:49:10,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:49:10,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:49:10,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:49:10,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:49:10,269 INFO L87 Difference]: Start difference. First operand 1553 states and 2228 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 22:49:14,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:49:14,644 INFO L93 Difference]: Finished difference Result 4115 states and 6205 transitions. [2021-11-20 22:49:14,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:49:14,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 131 [2021-11-20 22:49:14,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:49:14,670 INFO L225 Difference]: With dead ends: 4115 [2021-11-20 22:49:14,671 INFO L226 Difference]: Without dead ends: 2981 [2021-11-20 22:49:14,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:49:14,679 INFO L933 BasicCegarLoop]: 1591 mSDtfsCounter, 2527 mSDsluCounter, 2408 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2628 SdHoareTripleChecker+Valid, 3691 SdHoareTripleChecker+Invalid, 2004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:49:14,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2628 Valid, 3691 Invalid, 2004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 1636 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-20 22:49:14,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2981 states. [2021-11-20 22:49:14,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2981 to 1556. [2021-11-20 22:49:14,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1556 states, 982 states have (on average 1.3615071283095723) internal successors, (1337), 1023 states have internal predecessors, (1337), 448 states have call successors, (448), 126 states have call predecessors, (448), 125 states have return successors, (447), 442 states have call predecessors, (447), 447 states have call successors, (447) [2021-11-20 22:49:14,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 2232 transitions. [2021-11-20 22:49:14,868 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 2232 transitions. Word has length 131 [2021-11-20 22:49:14,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:49:14,868 INFO L470 AbstractCegarLoop]: Abstraction has 1556 states and 2232 transitions. [2021-11-20 22:49:14,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 22:49:14,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 2232 transitions. [2021-11-20 22:49:14,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-20 22:49:14,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:49:14,879 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:49:14,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 22:49:14,880 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:49:14,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:49:14,881 INFO L85 PathProgramCache]: Analyzing trace with hash 40035868, now seen corresponding path program 1 times [2021-11-20 22:49:14,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:49:14,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088143202] [2021-11-20 22:49:14,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:14,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:49:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:49:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-20 22:49:15,052 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:49:15,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088143202] [2021-11-20 22:49:15,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088143202] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:49:15,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854137353] [2021-11-20 22:49:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:15,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:49:15,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:49:15,058 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:49:15,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 22:49:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:49:15,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 22:49:15,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:49:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-20 22:49:16,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:49:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-20 22:49:16,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854137353] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:49:16,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1156839317] [2021-11-20 22:49:16,466 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2021-11-20 22:49:16,466 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:49:16,473 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:49:16,478 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:49:16,479 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:49:22,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:22,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:22,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:22,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:22,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:22,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:22,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 22 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 49 [2021-11-20 22:49:27,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:27,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:27,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:27,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:27,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:27,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:27,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 22 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 49 [2021-11-20 22:51:53,624 INFO L197 IcfgInterpreter]: Interpreting procedure kmalloc with input of size 420 for LOIs [2021-11-20 22:52:05,371 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 136 for LOIs [2021-11-20 22:52:06,557 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 420 for LOIs [2021-11-20 22:52:11,337 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:53:10,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1156839317] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:10,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:53:10,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [5, 4, 5] total 47 [2021-11-20 22:53:10,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730692544] [2021-11-20 22:53:10,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:10,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 22:53:10,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:10,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 22:53:10,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1897, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 22:53:10,668 INFO L87 Difference]: Start difference. First operand 1556 states and 2232 transitions. Second operand has 39 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 26 states have internal predecessors, (72), 10 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) [2021-11-20 22:54:11,984 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:13,837 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:16,536 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:38,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:38,949 INFO L93 Difference]: Finished difference Result 3179 states and 4585 transitions. [2021-11-20 22:54:38,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-20 22:54:38,950 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 26 states have internal predecessors, (72), 10 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) Word has length 133 [2021-11-20 22:54:38,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:38,961 INFO L225 Difference]: With dead ends: 3179 [2021-11-20 22:54:38,962 INFO L226 Difference]: Without dead ends: 1638 [2021-11-20 22:54:38,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 105.3s TimeCoverageRelationStatistics Valid=453, Invalid=3707, Unknown=0, NotChecked=0, Total=4160 [2021-11-20 22:54:38,970 INFO L933 BasicCegarLoop]: 957 mSDtfsCounter, 79 mSDsluCounter, 14281 mSDsCounter, 0 mSdLazyCounter, 7989 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 13945 SdHoareTripleChecker+Invalid, 8194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 7989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:38,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 13945 Invalid, 8194 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [205 Valid, 7989 Invalid, 0 Unknown, 0 Unchecked, 42.0s Time] [2021-11-20 22:54:38,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2021-11-20 22:54:39,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1597. [2021-11-20 22:54:39,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1597 states, 1013 states have (on average 1.3573543928923988) internal successors, (1375), 1054 states have internal predecessors, (1375), 456 states have call successors, (456), 129 states have call predecessors, (456), 127 states have return successors, (468), 449 states have call predecessors, (468), 455 states have call successors, (468) [2021-11-20 22:54:39,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 2299 transitions. [2021-11-20 22:54:39,146 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 2299 transitions. Word has length 133 [2021-11-20 22:54:39,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:39,147 INFO L470 AbstractCegarLoop]: Abstraction has 1597 states and 2299 transitions. [2021-11-20 22:54:39,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 26 states have internal predecessors, (72), 10 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) [2021-11-20 22:54:39,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 2299 transitions. [2021-11-20 22:54:39,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-20 22:54:39,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:39,158 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:54:39,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 22:54:39,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:54:39,386 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:39,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:39,387 INFO L85 PathProgramCache]: Analyzing trace with hash -791533800, now seen corresponding path program 1 times [2021-11-20 22:54:39,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:39,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300457275] [2021-11-20 22:54:39,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:39,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:39,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-20 22:54:39,575 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:39,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300457275] [2021-11-20 22:54:39,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300457275] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:54:39,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264706798] [2021-11-20 22:54:39,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:39,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:54:39,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:54:39,578 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:54:39,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 22:54:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:40,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 1155 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 22:54:40,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:54:40,513 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-20 22:54:40,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:54:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-20 22:54:40,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264706798] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:54:40,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [751656480] [2021-11-20 22:54:40,832 INFO L159 IcfgInterpreter]: Started Sifa with 99 locations of interest [2021-11-20 22:54:40,832 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:54:40,833 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:54:40,833 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:54:40,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:54:45,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:54:45,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 22:54:45,973 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 7 treesize of output 6 [2021-11-20 22:54:47,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 22 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 49 [2021-11-20 22:54:53,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 22 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 49 [2021-11-20 22:55:02,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 22:55:02,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2021-11-20 22:55:03,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 22:55:09,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 22:55:10,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2021-11-20 22:55:11,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 22:55:19,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2021-11-20 22:55:19,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 22:55:19,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 22:55:22,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 22:55:22,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2021-11-20 22:55:22,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 22:55:47,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 22:55:47,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 22:55:49,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 22:55:49,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 22:56:05,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 22:56:05,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 22:56:06,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 22:56:06,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 22:56:16,088 INFO L197 IcfgInterpreter]: Interpreting procedure kmalloc with input of size 108 for LOIs [2021-11-20 22:56:19,092 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 677 for LOIs [2021-11-20 22:56:21,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:56:21,542 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 7 treesize of output 6 [2021-11-20 22:56:21,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 22:56:28,091 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 128 for LOIs [2021-11-20 22:56:28,470 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 108 for LOIs [2021-11-20 22:56:29,917 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:56:40,617 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification. DAG size of input: 503 DAG size of output: 447 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 22:57:06,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [751656480] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:57:06,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:57:06,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [5, 4, 5] total 51 [2021-11-20 22:57:06,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511468070] [2021-11-20 22:57:06,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:57:06,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-20 22:57:06,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:57:06,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-20 22:57:06,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2310, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 22:57:06,742 INFO L87 Difference]: Start difference. First operand 1597 states and 2299 transitions. Second operand has 43 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 28 states have internal predecessors, (75), 11 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2021-11-20 22:57:21,620 WARN L227 SmtUtils]: Spent 5.71s on a formula simplification. DAG size of input: 726 DAG size of output: 676 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 22:57:31,924 WARN L227 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 671 DAG size of output: 647 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 22:57:39,616 WARN L227 SmtUtils]: Spent 7.40s on a formula simplification. DAG size of input: 635 DAG size of output: 630 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 22:57:47,001 WARN L227 SmtUtils]: Spent 7.11s on a formula simplification. DAG size of input: 661 DAG size of output: 638 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 22:58:04,044 WARN L227 SmtUtils]: Spent 5.56s on a formula simplification. DAG size of input: 680 DAG size of output: 654 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 22:58:09,687 WARN L227 SmtUtils]: Spent 5.38s on a formula simplification. DAG size of input: 693 DAG size of output: 669 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 22:58:21,846 WARN L227 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 694 DAG size of output: 665 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 22:58:29,064 WARN L227 SmtUtils]: Spent 5.34s on a formula simplification. DAG size of input: 702 DAG size of output: 668 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 22:58:34,717 WARN L227 SmtUtils]: Spent 5.41s on a formula simplification. DAG size of input: 707 DAG size of output: 673 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 22:58:42,183 WARN L227 SmtUtils]: Spent 5.51s on a formula simplification. DAG size of input: 712 DAG size of output: 676 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 22:58:48,010 WARN L227 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 717 DAG size of output: 681 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 22:59:05,195 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:59:07,585 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:59:09,635 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:59:15,623 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:59:24,360 WARN L227 SmtUtils]: Spent 7.30s on a formula simplification. DAG size of input: 745 DAG size of output: 709 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 22:59:37,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:59:37,204 INFO L93 Difference]: Finished difference Result 3176 states and 4562 transitions. [2021-11-20 22:59:37,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-20 22:59:37,204 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 28 states have internal predecessors, (75), 11 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) Word has length 137 [2021-11-20 22:59:37,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:59:37,215 INFO L225 Difference]: With dead ends: 3176 [2021-11-20 22:59:37,216 INFO L226 Difference]: Without dead ends: 1635 [2021-11-20 22:59:37,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 151.1s TimeCoverageRelationStatistics Valid=529, Invalid=6277, Unknown=0, NotChecked=0, Total=6806 [2021-11-20 22:59:37,225 INFO L933 BasicCegarLoop]: 924 mSDtfsCounter, 56 mSDsluCounter, 21860 mSDsCounter, 0 mSdLazyCounter, 8860 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 20617 SdHoareTripleChecker+Invalid, 9318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 8860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 35.8s IncrementalHoareTripleChecker+Time [2021-11-20 22:59:37,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 20617 Invalid, 9318 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [83 Valid, 8860 Invalid, 0 Unknown, 375 Unchecked, 35.8s Time] [2021-11-20 22:59:37,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-11-20 22:59:37,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1600. [2021-11-20 22:59:37,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1015 states have (on average 1.3576354679802956) internal successors, (1378), 1057 states have internal predecessors, (1378), 456 states have call successors, (456), 130 states have call predecessors, (456), 128 states have return successors, (468), 448 states have call predecessors, (468), 455 states have call successors, (468) [2021-11-20 22:59:37,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2302 transitions. [2021-11-20 22:59:37,404 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2302 transitions. Word has length 137 [2021-11-20 22:59:37,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:59:37,404 INFO L470 AbstractCegarLoop]: Abstraction has 1600 states and 2302 transitions. [2021-11-20 22:59:37,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 28 states have internal predecessors, (75), 11 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2021-11-20 22:59:37,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2302 transitions. [2021-11-20 22:59:37,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-20 22:59:37,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:59:37,428 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:59:37,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 22:59:37,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 22:59:37,638 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:59:37,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:59:37,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1447825387, now seen corresponding path program 1 times [2021-11-20 22:59:37,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:59:37,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174475674] [2021-11-20 22:59:37,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:59:37,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:59:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:59:37,813 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-20 22:59:37,814 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:59:37,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174475674] [2021-11-20 22:59:37,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174475674] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:59:37,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170997594] [2021-11-20 22:59:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:59:37,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:59:37,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:59:37,818 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:59:37,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b129f63-1e61-4558-aa7d-c7ea274686c7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 22:59:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:59:38,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 22:59:38,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:59:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-20 22:59:38,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:59:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-20 22:59:39,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170997594] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:59:39,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1160973051] [2021-11-20 22:59:39,060 INFO L159 IcfgInterpreter]: Started Sifa with 99 locations of interest [2021-11-20 22:59:39,060 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:59:39,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:59:39,061 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:59:39,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:59:45,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:59:45,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:59:45,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:59:45,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:59:45,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:59:45,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:59:45,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 22 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 49 [2021-11-20 22:59:50,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:59:50,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:59:50,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:59:50,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:59:50,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:59:50,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:59:50,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 22 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 49