./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--dm-cache.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--dm-cache.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 18adc7ce46ffd1a3ff82c3c7fa6ef66e3ed2399c064dd9dfbe8501509215a2b1 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:30:43,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:30:43,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:30:43,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:30:43,687 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:30:43,693 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:30:43,695 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:30:43,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:30:43,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:30:43,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:30:43,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:30:43,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:30:43,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:30:43,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:30:43,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:30:43,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:30:43,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:30:43,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:30:43,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:30:43,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:30:43,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:30:43,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:30:43,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:30:43,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:30:43,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:30:43,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:30:43,761 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:30:43,764 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:30:43,764 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:30:43,766 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:30:43,767 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:30:43,768 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:30:43,771 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:30:43,773 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:30:43,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:30:43,775 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:30:43,776 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:30:43,776 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:30:43,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:30:43,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:30:43,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:30:43,779 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 20:30:43,830 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:30:43,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:30:43,831 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:30:43,832 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:30:43,840 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:30:43,840 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:30:43,840 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:30:43,841 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:30:43,841 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:30:43,841 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:30:43,843 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:30:43,843 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:30:43,843 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:30:43,843 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:30:43,844 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:30:43,844 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:30:43,844 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:30:43,845 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:30:43,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:30:43,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:30:43,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:30:43,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:30:43,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:30:43,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:30:43,847 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:30:43,848 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:30:43,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:30:43,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:30:43,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:30:43,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:30:43,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:30:43,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:30:43,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:30:43,852 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:30:43,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:30:43,852 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:30:43,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:30:43,853 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:30:43,853 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_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18adc7ce46ffd1a3ff82c3c7fa6ef66e3ed2399c064dd9dfbe8501509215a2b1 [2021-11-25 20:30:44,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:30:44,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:30:44,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:30:44,236 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:30:44,236 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:30:44,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--dm-cache.ko-entry_point.cil.out.i [2021-11-25 20:30:44,318 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/data/cd4a3255f/f9c59f0f56174907902d7917d521d4ec/FLAG63b4c7263 [2021-11-25 20:30:45,522 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:30:45,524 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--dm-cache.ko-entry_point.cil.out.i [2021-11-25 20:30:45,613 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/data/cd4a3255f/f9c59f0f56174907902d7917d521d4ec/FLAG63b4c7263 [2021-11-25 20:30:45,682 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/data/cd4a3255f/f9c59f0f56174907902d7917d521d4ec [2021-11-25 20:30:45,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:30:45,688 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:30:45,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:30:45,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:30:45,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:30:45,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:30:45" (1/1) ... [2021-11-25 20:30:45,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b8d319e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:45, skipping insertion in model container [2021-11-25 20:30:45,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:30:45" (1/1) ... [2021-11-25 20:30:45,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:30:45,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:30:50,385 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_0a4f2348-eabc-4e08-b77e-31db9a5e6689/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--dm-cache.ko-entry_point.cil.out.i[376341,376354] [2021-11-25 20:30:50,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:30:50,583 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:30:51,224 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_0a4f2348-eabc-4e08-b77e-31db9a5e6689/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--dm-cache.ko-entry_point.cil.out.i[376341,376354] [2021-11-25 20:30:51,236 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:30:51,520 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:30:51,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:51 WrapperNode [2021-11-25 20:30:51,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:30:51,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:30:51,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:30:51,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:30:51,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:51" (1/1) ... [2021-11-25 20:30:51,692 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:51" (1/1) ... [2021-11-25 20:30:52,053 INFO L137 Inliner]: procedures = 595, calls = 3937, calls flagged for inlining = 264, calls inlined = 257, statements flattened = 9795 [2021-11-25 20:30:52,053 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:30:52,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:30:52,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:30:52,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:30:52,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:51" (1/1) ... [2021-11-25 20:30:52,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:51" (1/1) ... [2021-11-25 20:30:52,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:51" (1/1) ... [2021-11-25 20:30:52,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:51" (1/1) ... [2021-11-25 20:30:52,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:51" (1/1) ... [2021-11-25 20:30:52,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:51" (1/1) ... [2021-11-25 20:30:52,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:51" (1/1) ... [2021-11-25 20:30:52,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:30:52,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:30:52,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:30:52,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:30:52,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:51" (1/1) ... [2021-11-25 20:30:52,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:30:52,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:30:52,638 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:30:52,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:30:52,697 INFO L130 BoogieDeclarations]: Found specification of procedure resize_cache_dev [2021-11-25 20:30:52,698 INFO L138 BoogieDeclarations]: Found implementation of procedure resize_cache_dev [2021-11-25 20:30:52,698 INFO L130 BoogieDeclarations]: Found specification of procedure block_size_is_power_of_two [2021-11-25 20:30:52,698 INFO L138 BoogieDeclarations]: Found implementation of procedure block_size_is_power_of_two [2021-11-25 20:30:52,698 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-11-25 20:30:52,698 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-11-25 20:30:52,699 INFO L130 BoogieDeclarations]: Found specification of procedure dm_block_manager_destroy [2021-11-25 20:30:52,699 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_block_manager_destroy [2021-11-25 20:30:52,699 INFO L130 BoogieDeclarations]: Found specification of procedure bio_endio [2021-11-25 20:30:52,699 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_endio [2021-11-25 20:30:52,699 INFO L130 BoogieDeclarations]: Found specification of procedure __copy_sm_root [2021-11-25 20:30:52,700 INFO L138 BoogieDeclarations]: Found implementation of procedure __copy_sm_root [2021-11-25 20:30:52,700 INFO L130 BoogieDeclarations]: Found specification of procedure bio_writes_complete_block [2021-11-25 20:30:52,700 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_writes_complete_block [2021-11-25 20:30:52,700 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-25 20:30:52,700 INFO L130 BoogieDeclarations]: Found specification of procedure dm_tm_pre_commit [2021-11-25 20:30:52,701 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_tm_pre_commit [2021-11-25 20:30:52,701 INFO L130 BoogieDeclarations]: Found specification of procedure i_size_read [2021-11-25 20:30:52,701 INFO L138 BoogieDeclarations]: Found implementation of procedure i_size_read [2021-11-25 20:30:52,701 INFO L130 BoogieDeclarations]: Found specification of procedure cache_map [2021-11-25 20:30:52,701 INFO L138 BoogieDeclarations]: Found implementation of procedure cache_map [2021-11-25 20:30:52,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 20:30:52,702 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 20:30:52,702 INFO L130 BoogieDeclarations]: Found specification of procedure process_migrations [2021-11-25 20:30:52,702 INFO L138 BoogieDeclarations]: Found implementation of procedure process_migrations [2021-11-25 20:30:52,702 INFO L130 BoogieDeclarations]: Found specification of procedure remap_cell_to_origin_clear_discard [2021-11-25 20:30:52,703 INFO L138 BoogieDeclarations]: Found implementation of procedure remap_cell_to_origin_clear_discard [2021-11-25 20:30:52,703 INFO L130 BoogieDeclarations]: Found specification of procedure dm_bm_checksum [2021-11-25 20:30:52,703 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_bm_checksum [2021-11-25 20:30:52,703 INFO L130 BoogieDeclarations]: Found specification of procedure variable_test_bit [2021-11-25 20:30:52,703 INFO L138 BoogieDeclarations]: Found implementation of procedure variable_test_bit [2021-11-25 20:30:52,704 INFO L130 BoogieDeclarations]: Found specification of procedure put_policy [2021-11-25 20:30:52,704 INFO L138 BoogieDeclarations]: Found implementation of procedure put_policy [2021-11-25 20:30:52,704 INFO L130 BoogieDeclarations]: Found specification of procedure check_if_tick_bio_needed [2021-11-25 20:30:52,705 INFO L138 BoogieDeclarations]: Found implementation of procedure check_if_tick_bio_needed [2021-11-25 20:30:52,705 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 20:30:52,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 20:30:52,705 INFO L130 BoogieDeclarations]: Found specification of procedure update_flags [2021-11-25 20:30:52,705 INFO L138 BoogieDeclarations]: Found implementation of procedure update_flags [2021-11-25 20:30:52,706 INFO L130 BoogieDeclarations]: Found specification of procedure calc_discard_block_range [2021-11-25 20:30:52,706 INFO L138 BoogieDeclarations]: Found implementation of procedure calc_discard_block_range [2021-11-25 20:30:52,706 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~~sector_t~0~X~~sector_t~0~X~$Pointer$~TO~int [2021-11-25 20:30:52,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~~sector_t~0~X~~sector_t~0~X~$Pointer$~TO~int [2021-11-25 20:30:52,706 INFO L130 BoogieDeclarations]: Found specification of procedure dm_cell_release_no_holder [2021-11-25 20:30:52,707 INFO L130 BoogieDeclarations]: Found specification of procedure free_bitset [2021-11-25 20:30:52,707 INFO L138 BoogieDeclarations]: Found implementation of procedure free_bitset [2021-11-25 20:30:52,707 INFO L130 BoogieDeclarations]: Found specification of procedure commit_if_needed [2021-11-25 20:30:52,708 INFO L138 BoogieDeclarations]: Found implementation of procedure commit_if_needed [2021-11-25 20:30:52,708 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2021-11-25 20:30:52,709 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2021-11-25 20:30:52,710 INFO L130 BoogieDeclarations]: Found specification of procedure __might_sleep [2021-11-25 20:30:52,710 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_sleep [2021-11-25 20:30:52,710 INFO L130 BoogieDeclarations]: Found specification of procedure get_per_bio_data [2021-11-25 20:30:52,711 INFO L138 BoogieDeclarations]: Found implementation of procedure get_per_bio_data [2021-11-25 20:30:52,711 INFO L130 BoogieDeclarations]: Found specification of procedure remap_to_origin_then_cache [2021-11-25 20:30:52,711 INFO L138 BoogieDeclarations]: Found implementation of procedure remap_to_origin_then_cache [2021-11-25 20:30:52,711 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2021-11-25 20:30:52,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2021-11-25 20:30:52,712 INFO L130 BoogieDeclarations]: Found specification of procedure dm_cache_remove_mapping [2021-11-25 20:30:52,712 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_cache_remove_mapping [2021-11-25 20:30:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure dblock_to_oblock [2021-11-25 20:30:52,713 INFO L138 BoogieDeclarations]: Found implementation of procedure dblock_to_oblock [2021-11-25 20:30:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-25 20:30:52,713 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-25 20:30:52,714 INFO L130 BoogieDeclarations]: Found specification of procedure remap_to_origin [2021-11-25 20:30:52,714 INFO L138 BoogieDeclarations]: Found implementation of procedure remap_to_origin [2021-11-25 20:30:52,714 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bitset [2021-11-25 20:30:52,714 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bitset [2021-11-25 20:30:52,714 INFO L130 BoogieDeclarations]: Found specification of procedure bio_detain_range [2021-11-25 20:30:52,715 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_detain_range [2021-11-25 20:30:52,715 INFO L130 BoogieDeclarations]: Found specification of procedure from_cblock [2021-11-25 20:30:52,715 INFO L138 BoogieDeclarations]: Found implementation of procedure from_cblock [2021-11-25 20:30:52,715 INFO L130 BoogieDeclarations]: Found specification of procedure writethrough_mode [2021-11-25 20:30:52,716 INFO L138 BoogieDeclarations]: Found implementation of procedure writethrough_mode [2021-11-25 20:30:52,716 INFO L130 BoogieDeclarations]: Found specification of procedure write_dirty_bitset [2021-11-25 20:30:52,717 INFO L138 BoogieDeclarations]: Found implementation of procedure write_dirty_bitset [2021-11-25 20:30:52,717 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-25 20:30:52,717 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-25 20:30:52,717 INFO L130 BoogieDeclarations]: Found specification of procedure writeback_mode [2021-11-25 20:30:52,717 INFO L138 BoogieDeclarations]: Found implementation of procedure writeback_mode [2021-11-25 20:30:52,717 INFO L130 BoogieDeclarations]: Found specification of procedure cache_postsuspend [2021-11-25 20:30:52,718 INFO L138 BoogieDeclarations]: Found implementation of procedure cache_postsuspend [2021-11-25 20:30:52,718 INFO L130 BoogieDeclarations]: Found specification of procedure prealloc_get_migration [2021-11-25 20:30:52,719 INFO L138 BoogieDeclarations]: Found implementation of procedure prealloc_get_migration [2021-11-25 20:30:52,719 INFO L130 BoogieDeclarations]: Found specification of procedure issue_copy_or_discard [2021-11-25 20:30:52,719 INFO L138 BoogieDeclarations]: Found implementation of procedure issue_copy_or_discard [2021-11-25 20:30:52,720 INFO L130 BoogieDeclarations]: Found specification of procedure cache_dtr [2021-11-25 20:30:52,720 INFO L138 BoogieDeclarations]: Found implementation of procedure cache_dtr [2021-11-25 20:30:52,720 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2021-11-25 20:30:52,721 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2021-11-25 20:30:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-25 20:30:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_prison_cell [2021-11-25 20:30:52,722 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_prison_cell [2021-11-25 20:30:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure dm_cache_policy_get_version [2021-11-25 20:30:52,723 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_cache_policy_get_version [2021-11-25 20:30:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-25 20:30:52,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-25 20:30:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-25 20:30:52,724 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-25 20:30:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure __create_persistent_data_objects [2021-11-25 20:30:52,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_persistent_data_objects [2021-11-25 20:30:52,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:30:52,725 INFO L130 BoogieDeclarations]: Found specification of procedure get_per_bio_data_size [2021-11-25 20:30:52,725 INFO L138 BoogieDeclarations]: Found implementation of procedure get_per_bio_data_size [2021-11-25 20:30:52,725 INFO L130 BoogieDeclarations]: Found specification of procedure dm_array_resize [2021-11-25 20:30:52,726 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_array_resize [2021-11-25 20:30:52,726 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-25 20:30:52,726 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-25 20:30:52,726 INFO L130 BoogieDeclarations]: Found specification of procedure accounted_request [2021-11-25 20:30:52,726 INFO L138 BoogieDeclarations]: Found implementation of procedure accounted_request [2021-11-25 20:30:52,727 INFO L130 BoogieDeclarations]: Found specification of procedure pack_value [2021-11-25 20:30:52,728 INFO L138 BoogieDeclarations]: Found implementation of procedure pack_value [2021-11-25 20:30:52,731 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-11-25 20:30:52,731 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-11-25 20:30:52,731 INFO L130 BoogieDeclarations]: Found specification of procedure bio_list_empty [2021-11-25 20:30:52,731 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_list_empty [2021-11-25 20:30:52,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 20:30:52,733 INFO L130 BoogieDeclarations]: Found specification of procedure clear_discard [2021-11-25 20:30:52,733 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_discard [2021-11-25 20:30:52,733 INFO L130 BoogieDeclarations]: Found specification of procedure prealloc_get_cell [2021-11-25 20:30:52,734 INFO L138 BoogieDeclarations]: Found implementation of procedure prealloc_get_cell [2021-11-25 20:30:52,741 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-25 20:30:52,741 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-25 20:30:52,741 INFO L130 BoogieDeclarations]: Found specification of procedure process_deferred_flush_bios [2021-11-25 20:30:52,742 INFO L138 BoogieDeclarations]: Found implementation of procedure process_deferred_flush_bios [2021-11-25 20:30:52,742 INFO L130 BoogieDeclarations]: Found specification of procedure cell_defer [2021-11-25 20:30:52,742 INFO L138 BoogieDeclarations]: Found implementation of procedure cell_defer [2021-11-25 20:30:52,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 20:30:52,742 INFO L130 BoogieDeclarations]: Found specification of procedure dm_tm_commit [2021-11-25 20:30:52,742 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_tm_commit [2021-11-25 20:30:52,743 INFO L130 BoogieDeclarations]: Found specification of procedure sb_check [2021-11-25 20:30:52,743 INFO L138 BoogieDeclarations]: Found implementation of procedure sb_check [2021-11-25 20:30:52,743 INFO L130 BoogieDeclarations]: Found specification of procedure dm_cache_policy_destroy [2021-11-25 20:30:52,743 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_cache_policy_destroy [2021-11-25 20:30:52,743 INFO L130 BoogieDeclarations]: Found specification of procedure cache_device_name [2021-11-25 20:30:52,743 INFO L138 BoogieDeclarations]: Found implementation of procedure cache_device_name [2021-11-25 20:30:52,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:30:52,744 INFO L130 BoogieDeclarations]: Found specification of procedure get_policy_once [2021-11-25 20:30:52,744 INFO L138 BoogieDeclarations]: Found implementation of procedure get_policy_once [2021-11-25 20:30:52,744 INFO L130 BoogieDeclarations]: Found specification of procedure issue [2021-11-25 20:30:52,744 INFO L138 BoogieDeclarations]: Found implementation of procedure issue [2021-11-25 20:30:52,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-25 20:30:52,745 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-25 20:30:52,745 INFO L130 BoogieDeclarations]: Found specification of procedure inc_and_issue [2021-11-25 20:30:52,745 INFO L138 BoogieDeclarations]: Found implementation of procedure inc_and_issue [2021-11-25 20:30:52,745 INFO L130 BoogieDeclarations]: Found specification of procedure write_discard_bitset [2021-11-25 20:30:52,745 INFO L138 BoogieDeclarations]: Found implementation of procedure write_discard_bitset [2021-11-25 20:30:52,745 INFO L130 BoogieDeclarations]: Found specification of procedure sync_metadata [2021-11-25 20:30:52,746 INFO L138 BoogieDeclarations]: Found implementation of procedure sync_metadata [2021-11-25 20:30:52,746 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait_event [2021-11-25 20:30:52,746 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait_event [2021-11-25 20:30:52,746 INFO L130 BoogieDeclarations]: Found specification of procedure set_discard_range [2021-11-25 20:30:52,746 INFO L138 BoogieDeclarations]: Found implementation of procedure set_discard_range [2021-11-25 20:30:52,746 INFO L130 BoogieDeclarations]: Found specification of procedure policy_unchanged [2021-11-25 20:30:52,746 INFO L138 BoogieDeclarations]: Found implementation of procedure policy_unchanged [2021-11-25 20:30:52,747 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2021-11-25 20:30:52,747 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2021-11-25 20:30:52,747 INFO L130 BoogieDeclarations]: Found specification of procedure set_config_value [2021-11-25 20:30:52,747 INFO L138 BoogieDeclarations]: Found implementation of procedure set_config_value [2021-11-25 20:30:52,747 INFO L130 BoogieDeclarations]: Found specification of procedure stop_worker [2021-11-25 20:30:52,747 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_worker [2021-11-25 20:30:52,748 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_destroy_workqueue_12 [2021-11-25 20:30:52,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_destroy_workqueue_12 [2021-11-25 20:30:52,748 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-25 20:30:52,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-25 20:30:52,748 INFO L130 BoogieDeclarations]: Found specification of procedure policy_force_mapping [2021-11-25 20:30:52,748 INFO L138 BoogieDeclarations]: Found implementation of procedure policy_force_mapping [2021-11-25 20:30:52,749 INFO L130 BoogieDeclarations]: Found specification of procedure remap_to_origin_clear_discard [2021-11-25 20:30:52,749 INFO L138 BoogieDeclarations]: Found implementation of procedure remap_to_origin_clear_discard [2021-11-25 20:30:52,749 INFO L130 BoogieDeclarations]: Found specification of procedure __save_sm_root [2021-11-25 20:30:52,749 INFO L138 BoogieDeclarations]: Found implementation of procedure __save_sm_root [2021-11-25 20:30:52,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:30:52,749 INFO L130 BoogieDeclarations]: Found specification of procedure up_read [2021-11-25 20:30:52,750 INFO L138 BoogieDeclarations]: Found implementation of procedure up_read [2021-11-25 20:30:52,750 INFO L130 BoogieDeclarations]: Found specification of procedure blocks_are_unmapped_or_clean [2021-11-25 20:30:52,750 INFO L138 BoogieDeclarations]: Found implementation of procedure blocks_are_unmapped_or_clean [2021-11-25 20:30:52,750 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-11-25 20:30:52,750 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-11-25 20:30:52,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:30:52,751 INFO L130 BoogieDeclarations]: Found specification of procedure do_worker [2021-11-25 20:30:52,751 INFO L138 BoogieDeclarations]: Found implementation of procedure do_worker [2021-11-25 20:30:52,751 INFO L130 BoogieDeclarations]: Found specification of procedure list_splice_init [2021-11-25 20:30:52,751 INFO L138 BoogieDeclarations]: Found implementation of procedure list_splice_init [2021-11-25 20:30:52,751 INFO L130 BoogieDeclarations]: Found specification of procedure build_key [2021-11-25 20:30:52,751 INFO L138 BoogieDeclarations]: Found implementation of procedure build_key [2021-11-25 20:30:52,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:30:52,753 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 20:30:52,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 20:30:52,754 INFO L130 BoogieDeclarations]: Found specification of procedure write_hints [2021-11-25 20:30:52,754 INFO L138 BoogieDeclarations]: Found implementation of procedure write_hints [2021-11-25 20:30:52,754 INFO L130 BoogieDeclarations]: Found specification of procedure ___ratelimit [2021-11-25 20:30:52,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ___ratelimit [2021-11-25 20:30:52,754 INFO L130 BoogieDeclarations]: Found specification of procedure __find_policy [2021-11-25 20:30:52,754 INFO L138 BoogieDeclarations]: Found implementation of procedure __find_policy [2021-11-25 20:30:52,755 INFO L130 BoogieDeclarations]: Found specification of procedure policy_tick [2021-11-25 20:30:52,755 INFO L138 BoogieDeclarations]: Found implementation of procedure policy_tick [2021-11-25 20:30:52,755 INFO L130 BoogieDeclarations]: Found specification of procedure cache_resume [2021-11-25 20:30:52,755 INFO L138 BoogieDeclarations]: Found implementation of procedure cache_resume [2021-11-25 20:30:52,755 INFO L130 BoogieDeclarations]: Found specification of procedure __list_splice [2021-11-25 20:30:52,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_splice [2021-11-25 20:30:52,756 INFO L130 BoogieDeclarations]: Found specification of procedure dm_cache_metadata_close [2021-11-25 20:30:52,756 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_cache_metadata_close [2021-11-25 20:30:52,756 INFO L130 BoogieDeclarations]: Found specification of procedure dm_cache_policy_get_hint_size [2021-11-25 20:30:52,756 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_cache_policy_get_hint_size [2021-11-25 20:30:52,756 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-11-25 20:30:52,756 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-11-25 20:30:52,757 INFO L130 BoogieDeclarations]: Found specification of procedure bio_list_pop [2021-11-25 20:30:52,757 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_list_pop [2021-11-25 20:30:52,757 INFO L130 BoogieDeclarations]: Found specification of procedure free_migration [2021-11-25 20:30:52,757 INFO L138 BoogieDeclarations]: Found implementation of procedure free_migration [2021-11-25 20:30:52,757 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2021-11-25 20:30:52,757 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2021-11-25 20:30:52,758 INFO L130 BoogieDeclarations]: Found specification of procedure passthrough_mode [2021-11-25 20:30:52,758 INFO L138 BoogieDeclarations]: Found implementation of procedure passthrough_mode [2021-11-25 20:30:52,758 INFO L130 BoogieDeclarations]: Found specification of procedure get_cache_mode [2021-11-25 20:30:52,758 INFO L138 BoogieDeclarations]: Found implementation of procedure get_cache_mode [2021-11-25 20:30:52,758 INFO L130 BoogieDeclarations]: Found specification of procedure to_cblock [2021-11-25 20:30:52,758 INFO L138 BoogieDeclarations]: Found implementation of procedure to_cblock [2021-11-25 20:30:52,759 INFO L130 BoogieDeclarations]: Found specification of procedure cache_iterate_devices [2021-11-25 20:30:52,759 INFO L138 BoogieDeclarations]: Found implementation of procedure cache_iterate_devices [2021-11-25 20:30:52,759 INFO L130 BoogieDeclarations]: Found specification of procedure to_oblock [2021-11-25 20:30:52,759 INFO L138 BoogieDeclarations]: Found implementation of procedure to_oblock [2021-11-25 20:30:52,759 INFO L130 BoogieDeclarations]: Found specification of procedure down_write [2021-11-25 20:30:52,759 INFO L138 BoogieDeclarations]: Found implementation of procedure down_write [2021-11-25 20:30:52,760 INFO L130 BoogieDeclarations]: Found specification of procedure block_div [2021-11-25 20:30:52,760 INFO L138 BoogieDeclarations]: Found implementation of procedure block_div [2021-11-25 20:30:52,760 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-25 20:30:52,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-25 20:30:52,760 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-25 20:30:52,760 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-25 20:30:52,761 INFO L130 BoogieDeclarations]: Found specification of procedure oblocks_per_dblock [2021-11-25 20:30:52,761 INFO L138 BoogieDeclarations]: Found implementation of procedure oblocks_per_dblock [2021-11-25 20:30:52,761 INFO L130 BoogieDeclarations]: Found specification of procedure policy_set_dirty [2021-11-25 20:30:52,761 INFO L138 BoogieDeclarations]: Found implementation of procedure policy_set_dirty [2021-11-25 20:30:52,761 INFO L130 BoogieDeclarations]: Found specification of procedure set_cache_size [2021-11-25 20:30:52,761 INFO L138 BoogieDeclarations]: Found implementation of procedure set_cache_size [2021-11-25 20:30:52,762 INFO L130 BoogieDeclarations]: Found specification of procedure cache_message [2021-11-25 20:30:52,762 INFO L138 BoogieDeclarations]: Found implementation of procedure cache_message [2021-11-25 20:30:52,763 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-11-25 20:30:52,767 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-11-25 20:30:52,767 INFO L130 BoogieDeclarations]: Found specification of procedure inc_ds [2021-11-25 20:30:52,768 INFO L138 BoogieDeclarations]: Found implementation of procedure inc_ds [2021-11-25 20:30:52,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:30:52,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:30:52,768 INFO L130 BoogieDeclarations]: Found specification of procedure inc_hit_counter [2021-11-25 20:30:52,768 INFO L138 BoogieDeclarations]: Found implementation of procedure inc_hit_counter [2021-11-25 20:30:52,769 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-25 20:30:52,769 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-25 20:30:52,770 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_flush_workqueue_11 [2021-11-25 20:30:52,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_flush_workqueue_11 [2021-11-25 20:30:52,770 INFO L130 BoogieDeclarations]: Found specification of procedure dm_cell_visit_release [2021-11-25 20:30:52,770 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_cell_visit_release [2021-11-25 20:30:52,770 INFO L130 BoogieDeclarations]: Found specification of procedure commit [2021-11-25 20:30:52,770 INFO L138 BoogieDeclarations]: Found implementation of procedure commit [2021-11-25 20:30:52,771 INFO L130 BoogieDeclarations]: Found specification of procedure bdev_get_queue [2021-11-25 20:30:52,771 INFO L138 BoogieDeclarations]: Found implementation of procedure bdev_get_queue [2021-11-25 20:30:52,771 INFO L130 BoogieDeclarations]: Found specification of procedure cache_io_hints [2021-11-25 20:30:52,771 INFO L138 BoogieDeclarations]: Found implementation of procedure cache_io_hints [2021-11-25 20:30:52,771 INFO L130 BoogieDeclarations]: Found specification of procedure cache_end_io [2021-11-25 20:30:52,771 INFO L138 BoogieDeclarations]: Found implementation of procedure cache_end_io [2021-11-25 20:30:52,772 INFO L130 BoogieDeclarations]: Found specification of procedure accounted_begin [2021-11-25 20:30:52,772 INFO L138 BoogieDeclarations]: Found implementation of procedure accounted_begin [2021-11-25 20:30:52,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 20:30:52,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 20:30:52,772 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 20:30:52,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 20:30:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure dm_cache_metadata_abort [2021-11-25 20:30:52,773 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_cache_metadata_abort [2021-11-25 20:30:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure read_superblock_fields [2021-11-25 20:30:52,773 INFO L138 BoogieDeclarations]: Found implementation of procedure read_superblock_fields [2021-11-25 20:30:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure blk_limits_io_min [2021-11-25 20:30:52,773 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_limits_io_min [2021-11-25 20:30:52,774 INFO L130 BoogieDeclarations]: Found specification of procedure inc_miss_counter [2021-11-25 20:30:52,774 INFO L138 BoogieDeclarations]: Found implementation of procedure inc_miss_counter [2021-11-25 20:30:52,774 INFO L130 BoogieDeclarations]: Found specification of procedure migration_failure [2021-11-25 20:30:52,774 INFO L138 BoogieDeclarations]: Found implementation of procedure migration_failure [2021-11-25 20:30:52,774 INFO L130 BoogieDeclarations]: Found specification of procedure dm_hook_bio [2021-11-25 20:30:52,774 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_hook_bio [2021-11-25 20:30:52,775 INFO L130 BoogieDeclarations]: Found specification of procedure dm_array_set_value [2021-11-25 20:30:52,775 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_array_set_value [2021-11-25 20:30:52,775 INFO L130 BoogieDeclarations]: Found specification of procedure free_io_migration [2021-11-25 20:30:52,775 INFO L138 BoogieDeclarations]: Found implementation of procedure free_io_migration [2021-11-25 20:30:52,775 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2021-11-25 20:30:52,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2021-11-25 20:30:52,776 INFO L130 BoogieDeclarations]: Found specification of procedure do_waker [2021-11-25 20:30:52,776 INFO L138 BoogieDeclarations]: Found implementation of procedure do_waker [2021-11-25 20:30:52,776 INFO L130 BoogieDeclarations]: Found specification of procedure get_dev_size [2021-11-25 20:30:52,776 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dev_size [2021-11-25 20:30:52,776 INFO L130 BoogieDeclarations]: Found specification of procedure is_discarded_oblock [2021-11-25 20:30:52,776 INFO L138 BoogieDeclarations]: Found implementation of procedure is_discarded_oblock [2021-11-25 20:30:52,777 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_bitset [2021-11-25 20:30:52,777 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_bitset [2021-11-25 20:30:52,777 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-25 20:30:52,777 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-25 20:30:52,777 INFO L130 BoogieDeclarations]: Found specification of procedure __setup_mapping_info [2021-11-25 20:30:52,777 INFO L138 BoogieDeclarations]: Found implementation of procedure __setup_mapping_info [2021-11-25 20:30:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-25 20:30:52,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-25 20:30:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure queue_delayed_work_on [2021-11-25 20:30:52,778 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_delayed_work_on [2021-11-25 20:30:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure bitset_size_in_bytes [2021-11-25 20:30:52,778 INFO L138 BoogieDeclarations]: Found implementation of procedure bitset_size_in_bytes [2021-11-25 20:30:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-25 20:30:52,779 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-25 20:30:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 20:30:52,779 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 20:30:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure dm_bm_is_read_only [2021-11-25 20:30:52,779 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_bm_is_read_only [2021-11-25 20:30:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 20:30:52,780 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 20:30:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure dm_block_location [2021-11-25 20:30:52,780 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_block_location [2021-11-25 20:30:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure dm_read_arg_group [2021-11-25 20:30:52,780 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_read_arg_group [2021-11-25 20:30:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure clear_dirty [2021-11-25 20:30:52,781 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_dirty [2021-11-25 20:30:52,781 INFO L130 BoogieDeclarations]: Found specification of procedure dm_kcopyd_copy [2021-11-25 20:30:52,781 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_kcopyd_copy [2021-11-25 20:30:52,781 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2021-11-25 20:30:52,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2021-11-25 20:30:52,781 INFO L130 BoogieDeclarations]: Found specification of procedure quiesce_migration [2021-11-25 20:30:52,782 INFO L138 BoogieDeclarations]: Found implementation of procedure quiesce_migration [2021-11-25 20:30:52,782 INFO L130 BoogieDeclarations]: Found specification of procedure dm_table_event [2021-11-25 20:30:52,782 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_table_event [2021-11-25 20:30:52,782 INFO L130 BoogieDeclarations]: Found specification of procedure blk_limits_io_opt [2021-11-25 20:30:52,782 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_limits_io_opt [2021-11-25 20:30:52,782 INFO L130 BoogieDeclarations]: Found specification of procedure dm_unregister_target [2021-11-25 20:30:52,783 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_unregister_target [2021-11-25 20:30:52,783 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2021-11-25 20:30:52,783 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2021-11-25 20:30:52,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:30:52,783 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-25 20:30:52,783 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-25 20:30:52,783 INFO L130 BoogieDeclarations]: Found specification of procedure down_read [2021-11-25 20:30:52,784 INFO L138 BoogieDeclarations]: Found implementation of procedure down_read [2021-11-25 20:30:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure free_prison_cell [2021-11-25 20:30:52,784 INFO L138 BoogieDeclarations]: Found implementation of procedure free_prison_cell [2021-11-25 20:30:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:30:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure __format_metadata [2021-11-25 20:30:52,784 INFO L138 BoogieDeclarations]: Found implementation of procedure __format_metadata [2021-11-25 20:30:52,785 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_1 [2021-11-25 20:30:52,785 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_1 [2021-11-25 20:30:52,785 INFO L130 BoogieDeclarations]: Found specification of procedure discard_or_flush [2021-11-25 20:30:52,785 INFO L138 BoogieDeclarations]: Found implementation of procedure discard_or_flush [2021-11-25 20:30:52,785 INFO L130 BoogieDeclarations]: Found specification of procedure prealloc_data_structs [2021-11-25 20:30:52,785 INFO L138 BoogieDeclarations]: Found implementation of procedure prealloc_data_structs [2021-11-25 20:30:52,786 INFO L130 BoogieDeclarations]: Found specification of procedure up_write [2021-11-25 20:30:52,786 INFO L138 BoogieDeclarations]: Found implementation of procedure up_write [2021-11-25 20:30:52,786 INFO L130 BoogieDeclarations]: Found specification of procedure unpack_value [2021-11-25 20:30:52,786 INFO L138 BoogieDeclarations]: Found implementation of procedure unpack_value [2021-11-25 20:30:52,786 INFO L130 BoogieDeclarations]: Found specification of procedure dm_sm_destroy [2021-11-25 20:30:52,786 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_sm_destroy [2021-11-25 20:30:52,787 INFO L130 BoogieDeclarations]: Found specification of procedure superblock_read_lock [2021-11-25 20:30:52,787 INFO L138 BoogieDeclarations]: Found implementation of procedure superblock_read_lock [2021-11-25 20:30:52,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 20:30:52,787 INFO L130 BoogieDeclarations]: Found specification of procedure dm_block_data [2021-11-25 20:30:52,787 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_block_data [2021-11-25 20:30:52,787 INFO L130 BoogieDeclarations]: Found specification of procedure from_dblock [2021-11-25 20:30:52,788 INFO L138 BoogieDeclarations]: Found implementation of procedure from_dblock [2021-11-25 20:30:52,788 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-25 20:30:52,788 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-25 20:30:52,788 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2021-11-25 20:30:52,788 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2021-11-25 20:30:52,788 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-25 20:30:52,788 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-25 20:30:52,789 INFO L130 BoogieDeclarations]: Found specification of procedure cache_bvec_merge [2021-11-25 20:30:52,789 INFO L138 BoogieDeclarations]: Found implementation of procedure cache_bvec_merge [2021-11-25 20:30:52,789 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-25 20:30:52,789 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-25 20:30:52,789 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2021-11-25 20:30:52,789 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2021-11-25 20:30:52,790 INFO L130 BoogieDeclarations]: Found specification of procedure is_dirty [2021-11-25 20:30:52,790 INFO L138 BoogieDeclarations]: Found implementation of procedure is_dirty [2021-11-25 20:30:52,790 INFO L130 BoogieDeclarations]: Found specification of procedure __open_or_format_metadata [2021-11-25 20:30:52,790 INFO L138 BoogieDeclarations]: Found implementation of procedure __open_or_format_metadata [2021-11-25 20:30:52,790 INFO L130 BoogieDeclarations]: Found specification of procedure bio_list_init [2021-11-25 20:30:52,790 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_list_init [2021-11-25 20:30:52,790 INFO L130 BoogieDeclarations]: Found specification of procedure flush_workqueue [2021-11-25 20:30:52,791 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_workqueue [2021-11-25 20:30:52,791 INFO L130 BoogieDeclarations]: Found specification of procedure dm_array_get_value [2021-11-25 20:30:52,791 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_array_get_value [2021-11-25 20:30:52,791 INFO L130 BoogieDeclarations]: Found specification of procedure dm_array_empty [2021-11-25 20:30:52,791 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_array_empty [2021-11-25 20:30:52,791 INFO L130 BoogieDeclarations]: Found specification of procedure set_dirty [2021-11-25 20:30:52,792 INFO L138 BoogieDeclarations]: Found implementation of procedure set_dirty [2021-11-25 20:30:52,792 INFO L130 BoogieDeclarations]: Found specification of procedure dm_put_device [2021-11-25 20:30:52,792 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_put_device [2021-11-25 20:30:52,792 INFO L130 BoogieDeclarations]: Found specification of procedure dm_array_walk [2021-11-25 20:30:52,792 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_array_walk [2021-11-25 20:30:52,792 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-11-25 20:30:52,792 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-11-25 20:30:52,793 INFO L130 BoogieDeclarations]: Found specification of procedure remap_to_cache [2021-11-25 20:30:52,793 INFO L138 BoogieDeclarations]: Found implementation of procedure remap_to_cache [2021-11-25 20:30:52,793 INFO L130 BoogieDeclarations]: Found specification of procedure oblock_to_dblock [2021-11-25 20:30:52,793 INFO L138 BoogieDeclarations]: Found implementation of procedure oblock_to_dblock [2021-11-25 20:30:52,793 INFO L130 BoogieDeclarations]: Found specification of procedure wake_worker [2021-11-25 20:30:52,793 INFO L138 BoogieDeclarations]: Found implementation of procedure wake_worker [2021-11-25 20:30:52,793 INFO L130 BoogieDeclarations]: Found specification of procedure prealloc_free_structs [2021-11-25 20:30:52,794 INFO L138 BoogieDeclarations]: Found implementation of procedure prealloc_free_structs [2021-11-25 20:30:52,794 INFO L130 BoogieDeclarations]: Found specification of procedure dm_disk_bitset_init [2021-11-25 20:30:52,794 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_disk_bitset_init [2021-11-25 20:30:52,794 INFO L130 BoogieDeclarations]: Found specification of procedure set_discard [2021-11-25 20:30:52,794 INFO L138 BoogieDeclarations]: Found implementation of procedure set_discard [2021-11-25 20:30:52,794 INFO L130 BoogieDeclarations]: Found specification of procedure get_bio_block [2021-11-25 20:30:52,794 INFO L138 BoogieDeclarations]: Found implementation of procedure get_bio_block [2021-11-25 20:30:52,795 INFO L130 BoogieDeclarations]: Found specification of procedure destroy [2021-11-25 20:30:52,795 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy [2021-11-25 20:30:52,795 INFO L130 BoogieDeclarations]: Found specification of procedure dm_bm_read_lock [2021-11-25 20:30:52,795 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_bm_read_lock [2021-11-25 20:30:52,795 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-25 20:30:52,795 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-25 20:30:52,796 INFO L130 BoogieDeclarations]: Found specification of procedure dm_cell_release [2021-11-25 20:30:52,796 INFO L130 BoogieDeclarations]: Found specification of procedure is_quiescing [2021-11-25 20:30:52,796 INFO L138 BoogieDeclarations]: Found implementation of procedure is_quiescing [2021-11-25 20:30:52,796 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 20:30:52,796 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 20:30:52,796 INFO L130 BoogieDeclarations]: Found specification of procedure abort_transaction [2021-11-25 20:30:52,796 INFO L138 BoogieDeclarations]: Found implementation of procedure abort_transaction [2021-11-25 20:30:52,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:30:52,797 INFO L130 BoogieDeclarations]: Found specification of procedure set_cache_mode [2021-11-25 20:30:52,797 INFO L138 BoogieDeclarations]: Found implementation of procedure set_cache_mode [2021-11-25 20:30:52,797 INFO L130 BoogieDeclarations]: Found specification of procedure dm_array_info_init [2021-11-25 20:30:52,797 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_array_info_init [2021-11-25 20:30:52,797 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 20:30:52,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 20:30:52,798 INFO L130 BoogieDeclarations]: Found specification of procedure from_oblock [2021-11-25 20:30:52,798 INFO L138 BoogieDeclarations]: Found implementation of procedure from_oblock [2021-11-25 20:30:52,798 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-25 20:30:52,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-25 20:30:52,798 INFO L130 BoogieDeclarations]: Found specification of procedure superblock_lock [2021-11-25 20:30:52,798 INFO L138 BoogieDeclarations]: Found implementation of procedure superblock_lock [2021-11-25 20:30:52,798 INFO L130 BoogieDeclarations]: Found specification of procedure avoid_copy [2021-11-25 20:30:52,799 INFO L138 BoogieDeclarations]: Found implementation of procedure avoid_copy [2021-11-25 20:30:52,799 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-11-25 20:30:52,799 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-11-25 20:30:52,799 INFO L130 BoogieDeclarations]: Found specification of procedure dm_cache_policy_get_name [2021-11-25 20:30:52,799 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_cache_policy_get_name [2021-11-25 20:30:52,799 INFO L130 BoogieDeclarations]: Found specification of procedure spare_migration_bandwidth [2021-11-25 20:30:52,799 INFO L138 BoogieDeclarations]: Found implementation of procedure spare_migration_bandwidth [2021-11-25 20:30:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure bio_list_add [2021-11-25 20:30:52,800 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_list_add [2021-11-25 20:30:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure remap_cell_to_cache_dirty [2021-11-25 20:30:52,800 INFO L138 BoogieDeclarations]: Found implementation of procedure remap_cell_to_cache_dirty [2021-11-25 20:30:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure prealloc_put_cell [2021-11-25 20:30:52,800 INFO L138 BoogieDeclarations]: Found implementation of procedure prealloc_put_cell [2021-11-25 20:30:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-11-25 20:30:52,800 INFO L138 BoogieDeclarations]: Found implementation of procedure strcasecmp [2021-11-25 20:30:52,801 INFO L130 BoogieDeclarations]: Found specification of procedure defer_bio [2021-11-25 20:30:52,801 INFO L138 BoogieDeclarations]: Found implementation of procedure defer_bio [2021-11-25 20:30:52,801 INFO L130 BoogieDeclarations]: Found specification of procedure metadata_operation_failed [2021-11-25 20:30:52,801 INFO L138 BoogieDeclarations]: Found implementation of procedure metadata_operation_failed [2021-11-25 20:30:52,801 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-25 20:30:52,801 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-25 20:30:52,801 INFO L130 BoogieDeclarations]: Found specification of procedure dm_shift_arg [2021-11-25 20:30:52,802 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_shift_arg [2021-11-25 20:30:52,802 INFO L130 BoogieDeclarations]: Found specification of procedure process_invalidation_requests [2021-11-25 20:30:52,802 INFO L138 BoogieDeclarations]: Found implementation of procedure process_invalidation_requests [2021-11-25 20:30:52,802 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2021-11-25 20:30:52,802 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2021-11-25 20:30:52,802 INFO L130 BoogieDeclarations]: Found specification of procedure bio_list_merge [2021-11-25 20:30:52,802 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_list_merge [2021-11-25 20:30:52,803 INFO L130 BoogieDeclarations]: Found specification of procedure policy_remove_mapping [2021-11-25 20:30:52,803 INFO L138 BoogieDeclarations]: Found implementation of procedure policy_remove_mapping [2021-11-25 20:30:52,803 INFO L130 BoogieDeclarations]: Found specification of procedure to_dblock [2021-11-25 20:30:52,803 INFO L138 BoogieDeclarations]: Found implementation of procedure to_dblock [2021-11-25 20:30:52,803 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_1 [2021-11-25 20:30:52,803 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_1 [2021-11-25 20:30:52,803 INFO L130 BoogieDeclarations]: Found specification of procedure bio_detain [2021-11-25 20:30:52,803 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_detain [2021-11-25 20:30:52,804 INFO L130 BoogieDeclarations]: Found specification of procedure kstrtoul [2021-11-25 20:30:52,804 INFO L138 BoogieDeclarations]: Found implementation of procedure kstrtoul [2021-11-25 20:30:52,804 INFO L130 BoogieDeclarations]: Found specification of procedure at_least_one_arg [2021-11-25 20:30:52,804 INFO L138 BoogieDeclarations]: Found implementation of procedure at_least_one_arg [2021-11-25 20:30:52,804 INFO L130 BoogieDeclarations]: Found specification of procedure __queue_quiesced_migration [2021-11-25 20:30:52,804 INFO L138 BoogieDeclarations]: Found implementation of procedure __queue_quiesced_migration [2021-11-25 20:30:52,804 INFO L130 BoogieDeclarations]: Found specification of procedure inc_io_migrations [2021-11-25 20:30:52,804 INFO L138 BoogieDeclarations]: Found implementation of procedure inc_io_migrations [2021-11-25 20:30:52,805 INFO L130 BoogieDeclarations]: Found specification of procedure mempool_free_slab [2021-11-25 20:30:52,805 INFO L130 BoogieDeclarations]: Found specification of procedure policy_map [2021-11-25 20:30:52,805 INFO L138 BoogieDeclarations]: Found implementation of procedure policy_map [2021-11-25 20:30:52,805 INFO L130 BoogieDeclarations]: Found specification of procedure dm_bio_prison_free_cell [2021-11-25 20:30:52,805 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_bio_prison_free_cell [2021-11-25 20:30:52,805 INFO L130 BoogieDeclarations]: Found specification of procedure dm_tm_destroy [2021-11-25 20:30:52,809 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_tm_destroy [2021-11-25 20:30:52,809 INFO L130 BoogieDeclarations]: Found specification of procedure complete_migration [2021-11-25 20:30:52,809 INFO L138 BoogieDeclarations]: Found implementation of procedure complete_migration [2021-11-25 20:30:52,809 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-25 20:30:52,809 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-25 20:30:52,810 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-25 20:30:52,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-25 20:30:52,810 INFO L130 BoogieDeclarations]: Found specification of procedure __destroy_persistent_data_objects [2021-11-25 20:30:52,810 INFO L138 BoogieDeclarations]: Found implementation of procedure __destroy_persistent_data_objects [2021-11-25 20:30:52,810 INFO L130 BoogieDeclarations]: Found specification of procedure lookup [2021-11-25 20:30:52,810 INFO L138 BoogieDeclarations]: Found implementation of procedure lookup [2021-11-25 20:30:52,810 INFO L130 BoogieDeclarations]: Found specification of procedure process_invalidation_request [2021-11-25 20:30:52,811 INFO L138 BoogieDeclarations]: Found implementation of procedure process_invalidation_request [2021-11-25 20:30:52,811 INFO L130 BoogieDeclarations]: Found specification of procedure migration_success_pre_commit [2021-11-25 20:30:52,811 INFO L138 BoogieDeclarations]: Found implementation of procedure migration_success_pre_commit [2021-11-25 20:30:52,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:30:52,811 INFO L130 BoogieDeclarations]: Found specification of procedure cache_status [2021-11-25 20:30:52,811 INFO L138 BoogieDeclarations]: Found implementation of procedure cache_status [2021-11-25 20:30:52,811 INFO L130 BoogieDeclarations]: Found specification of procedure dm_bm_unlock [2021-11-25 20:30:52,811 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_bm_unlock [2021-11-25 20:30:52,812 INFO L130 BoogieDeclarations]: Found specification of procedure dm_get_device [2021-11-25 20:30:52,812 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_get_device [2021-11-25 20:30:52,812 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-25 20:30:52,812 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dm_oblock_t~0~TO~VOID [2021-11-25 20:30:52,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dm_oblock_t~0~TO~VOID [2021-11-25 20:30:52,812 INFO L130 BoogieDeclarations]: Found specification of procedure process_cell [2021-11-25 20:30:52,812 INFO L138 BoogieDeclarations]: Found implementation of procedure process_cell [2021-11-25 20:30:54,330 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:30:54,339 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:30:55,098 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 20:31:08,664 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:31:11,035 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:31:11,036 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 20:31:11,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:31:11 BoogieIcfgContainer [2021-11-25 20:31:11,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:31:11,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:31:11,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:31:11,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:31:11,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:30:45" (1/3) ... [2021-11-25 20:31:11,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11a6fc84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:31:11, skipping insertion in model container [2021-11-25 20:31:11,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:51" (2/3) ... [2021-11-25 20:31:11,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11a6fc84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:31:11, skipping insertion in model container [2021-11-25 20:31:11,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:31:11" (3/3) ... [2021-11-25 20:31:11,056 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--md--dm-cache.ko-entry_point.cil.out.i [2021-11-25 20:31:11,064 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:31:11,064 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:31:11,156 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:31:11,178 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:31:11,179 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:31:11,348 INFO L276 IsEmpty]: Start isEmpty. Operand has 3296 states, 1927 states have (on average 1.2802283341982357) internal successors, (2467), 2010 states have internal predecessors, (2467), 1124 states have call successors, (1124), 244 states have call predecessors, (1124), 243 states have return successors, (1118), 1089 states have call predecessors, (1118), 1118 states have call successors, (1118) [2021-11-25 20:31:11,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-25 20:31:11,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:11,389 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:11,389 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:11,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:11,394 INFO L85 PathProgramCache]: Analyzing trace with hash -509605191, now seen corresponding path program 1 times [2021-11-25 20:31:11,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:11,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442117372] [2021-11-25 20:31:11,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:11,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2021-11-25 20:31:12,434 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:12,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442117372] [2021-11-25 20:31:12,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442117372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:12,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:12,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:31:12,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614863151] [2021-11-25 20:31:12,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:12,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:31:12,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:12,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:31:12,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:31:12,479 INFO L87 Difference]: Start difference. First operand has 3296 states, 1927 states have (on average 1.2802283341982357) internal successors, (2467), 2010 states have internal predecessors, (2467), 1124 states have call successors, (1124), 244 states have call predecessors, (1124), 243 states have return successors, (1118), 1089 states have call predecessors, (1118), 1118 states have call successors, (1118) Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 20:31:14,563 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:17,872 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:19,627 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:21,900 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:24,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:24,034 INFO L93 Difference]: Finished difference Result 9786 states and 14156 transitions. [2021-11-25 20:31:24,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:31:24,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 196 [2021-11-25 20:31:24,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:24,131 INFO L225 Difference]: With dead ends: 9786 [2021-11-25 20:31:24,132 INFO L226 Difference]: Without dead ends: 6493 [2021-11-25 20:31:24,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:31:24,177 INFO L933 BasicCegarLoop]: 5413 mSDtfsCounter, 4618 mSDsluCounter, 4682 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4618 SdHoareTripleChecker+Valid, 9713 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:24,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4618 Valid, 9713 Invalid, 785 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 779 Invalid, 3 Unknown, 0 Unchecked, 10.9s Time] [2021-11-25 20:31:24,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6493 states. [2021-11-25 20:31:24,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6493 to 6490. [2021-11-25 20:31:24,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6490 states, 3798 states have (on average 1.2740916271721958) internal successors, (4839), 3947 states have internal predecessors, (4839), 2209 states have call successors, (2209), 483 states have call predecessors, (2209), 482 states have return successors, (2207), 2149 states have call predecessors, (2207), 2207 states have call successors, (2207) [2021-11-25 20:31:24,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6490 states to 6490 states and 9255 transitions. [2021-11-25 20:31:24,773 INFO L78 Accepts]: Start accepts. Automaton has 6490 states and 9255 transitions. Word has length 196 [2021-11-25 20:31:24,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:24,778 INFO L470 AbstractCegarLoop]: Abstraction has 6490 states and 9255 transitions. [2021-11-25 20:31:24,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 20:31:24,780 INFO L276 IsEmpty]: Start isEmpty. Operand 6490 states and 9255 transitions. [2021-11-25 20:31:24,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-25 20:31:24,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:24,790 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:24,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:31:24,795 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:24,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1569033036, now seen corresponding path program 1 times [2021-11-25 20:31:24,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:24,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537486092] [2021-11-25 20:31:24,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:24,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2021-11-25 20:31:25,275 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:25,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537486092] [2021-11-25 20:31:25,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537486092] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:25,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:25,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:31:25,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194426788] [2021-11-25 20:31:25,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:25,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:31:25,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:25,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:31:25,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:31:25,282 INFO L87 Difference]: Start difference. First operand 6490 states and 9255 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 20:31:27,326 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:29,577 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:33,688 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:34,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:34,961 INFO L93 Difference]: Finished difference Result 19391 states and 27826 transitions. [2021-11-25 20:31:34,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:31:34,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 196 [2021-11-25 20:31:34,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:35,127 INFO L225 Difference]: With dead ends: 19391 [2021-11-25 20:31:35,127 INFO L226 Difference]: Without dead ends: 12930 [2021-11-25 20:31:35,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:31:35,200 INFO L933 BasicCegarLoop]: 5712 mSDtfsCounter, 4618 mSDsluCounter, 4620 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4618 SdHoareTripleChecker+Valid, 9950 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:35,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4618 Valid, 9950 Invalid, 814 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 811 Invalid, 2 Unknown, 0 Unchecked, 8.8s Time] [2021-11-25 20:31:35,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12930 states. [2021-11-25 20:31:36,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12930 to 12926. [2021-11-25 20:31:36,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12926 states, 7566 states have (on average 1.2743854084060269) internal successors, (9642), 7863 states have internal predecessors, (9642), 4396 states have call successors, (4396), 964 states have call predecessors, (4396), 963 states have return successors, (4398), 4278 states have call predecessors, (4398), 4394 states have call successors, (4398) [2021-11-25 20:31:36,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12926 states to 12926 states and 18436 transitions. [2021-11-25 20:31:36,444 INFO L78 Accepts]: Start accepts. Automaton has 12926 states and 18436 transitions. Word has length 196 [2021-11-25 20:31:36,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:36,450 INFO L470 AbstractCegarLoop]: Abstraction has 12926 states and 18436 transitions. [2021-11-25 20:31:36,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 20:31:36,452 INFO L276 IsEmpty]: Start isEmpty. Operand 12926 states and 18436 transitions. [2021-11-25 20:31:36,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-25 20:31:36,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:36,475 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:36,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:31:36,476 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:36,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:36,479 INFO L85 PathProgramCache]: Analyzing trace with hash -2041594791, now seen corresponding path program 1 times [2021-11-25 20:31:36,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:36,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280785116] [2021-11-25 20:31:36,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:36,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2021-11-25 20:31:36,995 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:36,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280785116] [2021-11-25 20:31:36,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280785116] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:36,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309466321] [2021-11-25 20:31:36,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:36,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:36,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:37,004 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:37,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:31:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:39,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 4046 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:31:39,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:39,730 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2021-11-25 20:31:39,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:39,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309466321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:39,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:31:39,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-11-25 20:31:39,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532385908] [2021-11-25 20:31:39,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:39,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:31:39,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:39,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:31:39,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:31:39,734 INFO L87 Difference]: Start difference. First operand 12926 states and 18436 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-25 20:31:41,772 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:44,663 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:48,763 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:51,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:51,398 INFO L93 Difference]: Finished difference Result 35278 states and 50056 transitions. [2021-11-25 20:31:51,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:31:51,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 261 [2021-11-25 20:31:51,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:51,628 INFO L225 Difference]: With dead ends: 35278 [2021-11-25 20:31:51,628 INFO L226 Difference]: Without dead ends: 22387 [2021-11-25 20:31:51,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:31:51,736 INFO L933 BasicCegarLoop]: 5562 mSDtfsCounter, 3283 mSDsluCounter, 4542 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 43 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3283 SdHoareTripleChecker+Valid, 9725 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:51,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3283 Valid, 9725 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1022 Invalid, 2 Unknown, 0 Unchecked, 10.7s Time] [2021-11-25 20:31:51,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22387 states. [2021-11-25 20:31:53,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22387 to 22374. [2021-11-25 20:31:53,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22374 states, 13060 states have (on average 1.2614088820826952) internal successors, (16474), 13639 states have internal predecessors, (16474), 7508 states have call successors, (7508), 1806 states have call predecessors, (7508), 1805 states have return successors, (7510), 7276 states have call predecessors, (7510), 7506 states have call successors, (7510) [2021-11-25 20:31:53,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22374 states to 22374 states and 31492 transitions. [2021-11-25 20:31:53,486 INFO L78 Accepts]: Start accepts. Automaton has 22374 states and 31492 transitions. Word has length 261 [2021-11-25 20:31:53,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:53,489 INFO L470 AbstractCegarLoop]: Abstraction has 22374 states and 31492 transitions. [2021-11-25 20:31:53,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-25 20:31:53,490 INFO L276 IsEmpty]: Start isEmpty. Operand 22374 states and 31492 transitions. [2021-11-25 20:31:53,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-25 20:31:53,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:53,507 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:53,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:53,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:53,724 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:53,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:53,725 INFO L85 PathProgramCache]: Analyzing trace with hash -404100668, now seen corresponding path program 1 times [2021-11-25 20:31:53,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:53,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713914896] [2021-11-25 20:31:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:53,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2021-11-25 20:31:54,437 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:54,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713914896] [2021-11-25 20:31:54,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713914896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:54,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669426166] [2021-11-25 20:31:54,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:54,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:54,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:54,440 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:54,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:31:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:56,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 3709 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:31:56,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2021-11-25 20:31:57,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:57,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669426166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:57,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:31:57,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-25 20:31:57,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037715821] [2021-11-25 20:31:57,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:57,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:31:57,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:57,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:31:57,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:57,234 INFO L87 Difference]: Start difference. First operand 22374 states and 31492 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 3 states have call successors, (39), 4 states have call predecessors, (39), 2 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-25 20:31:59,282 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:32:06,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:06,525 INFO L93 Difference]: Finished difference Result 44929 states and 63876 transitions. [2021-11-25 20:32:06,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:32:06,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 3 states have call successors, (39), 4 states have call predecessors, (39), 2 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) Word has length 257 [2021-11-25 20:32:06,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:06,813 INFO L225 Difference]: With dead ends: 44929 [2021-11-25 20:32:06,814 INFO L226 Difference]: Without dead ends: 22590 [2021-11-25 20:32:06,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:32:06,943 INFO L933 BasicCegarLoop]: 4284 mSDtfsCounter, 20 mSDsluCounter, 13978 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 17107 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:06,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 17107 Invalid, 1623 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [16 Valid, 1606 Invalid, 1 Unknown, 0 Unchecked, 8.3s Time] [2021-11-25 20:32:06,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22590 states. [2021-11-25 20:32:08,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22590 to 22590. [2021-11-25 20:32:08,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22590 states, 13204 states have (on average 1.2591638897303847) internal successors, (16626), 13783 states have internal predecessors, (16626), 7564 states have call successors, (7564), 1822 states have call predecessors, (7564), 1821 states have return successors, (7566), 7332 states have call predecessors, (7566), 7562 states have call successors, (7566) [2021-11-25 20:32:08,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22590 states to 22590 states and 31756 transitions. [2021-11-25 20:32:08,730 INFO L78 Accepts]: Start accepts. Automaton has 22590 states and 31756 transitions. Word has length 257 [2021-11-25 20:32:08,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:08,738 INFO L470 AbstractCegarLoop]: Abstraction has 22590 states and 31756 transitions. [2021-11-25 20:32:08,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 3 states have call successors, (39), 4 states have call predecessors, (39), 2 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-25 20:32:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand 22590 states and 31756 transitions. [2021-11-25 20:32:08,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-11-25 20:32:08,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:08,767 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:08,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:32:08,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:08,980 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:32:08,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:08,981 INFO L85 PathProgramCache]: Analyzing trace with hash 130593630, now seen corresponding path program 1 times [2021-11-25 20:32:08,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:08,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476155448] [2021-11-25 20:32:08,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:08,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:09,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:09,610 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2021-11-25 20:32:09,610 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:09,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476155448] [2021-11-25 20:32:09,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476155448] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:09,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:32:09,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:32:09,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733893981] [2021-11-25 20:32:09,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:09,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:32:09,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:09,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:32:09,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:32:09,614 INFO L87 Difference]: Start difference. First operand 22590 states and 31756 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-25 20:32:11,658 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:32:15,124 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:32:18,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:18,863 INFO L93 Difference]: Finished difference Result 55666 states and 78224 transitions. [2021-11-25 20:32:18,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:32:18,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) Word has length 298 [2021-11-25 20:32:18,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:19,092 INFO L225 Difference]: With dead ends: 55666 [2021-11-25 20:32:19,092 INFO L226 Difference]: Without dead ends: 33111 [2021-11-25 20:32:19,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:32:19,394 INFO L933 BasicCegarLoop]: 6977 mSDtfsCounter, 3783 mSDsluCounter, 4387 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 60 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3783 SdHoareTripleChecker+Valid, 11001 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:19,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3783 Valid, 11001 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1125 Invalid, 2 Unknown, 0 Unchecked, 8.3s Time] [2021-11-25 20:32:19,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33111 states. [2021-11-25 20:32:21,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33111 to 33090. [2021-11-25 20:32:21,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33090 states, 19370 states have (on average 1.255446566855963) internal successors, (24318), 20243 states have internal predecessors, (24318), 11004 states have call successors, (11004), 2716 states have call predecessors, (11004), 2715 states have return successors, (11006), 10654 states have call predecessors, (11006), 11002 states have call successors, (11006) [2021-11-25 20:32:21,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33090 states to 33090 states and 46328 transitions. [2021-11-25 20:32:21,903 INFO L78 Accepts]: Start accepts. Automaton has 33090 states and 46328 transitions. Word has length 298 [2021-11-25 20:32:21,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:21,904 INFO L470 AbstractCegarLoop]: Abstraction has 33090 states and 46328 transitions. [2021-11-25 20:32:21,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-25 20:32:21,905 INFO L276 IsEmpty]: Start isEmpty. Operand 33090 states and 46328 transitions. [2021-11-25 20:32:21,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-11-25 20:32:21,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:21,928 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:21,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:32:21,928 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:32:21,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:21,929 INFO L85 PathProgramCache]: Analyzing trace with hash 4360586, now seen corresponding path program 1 times [2021-11-25 20:32:21,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:21,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128435606] [2021-11-25 20:32:21,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:21,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-25 20:32:22,700 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:22,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128435606] [2021-11-25 20:32:22,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128435606] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:22,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229392292] [2021-11-25 20:32:22,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:22,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:22,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:22,704 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:22,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:32:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:24,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 3974 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:32:24,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2021-11-25 20:32:25,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:32:25,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229392292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:25,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:32:25,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-25 20:32:25,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198931392] [2021-11-25 20:32:25,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:25,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:32:25,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:25,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:32:25,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:32:25,363 INFO L87 Difference]: Start difference. First operand 33090 states and 46328 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (45), 4 states have call predecessors, (45), 2 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-25 20:32:27,410 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:32:29,897 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:32:33,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:32:35,907 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:32:38,791 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:32:42,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:42,693 INFO L93 Difference]: Finished difference Result 66517 states and 94140 transitions. [2021-11-25 20:32:42,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:32:42,695 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (45), 4 states have call predecessors, (45), 2 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 286 [2021-11-25 20:32:42,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:42,966 INFO L225 Difference]: With dead ends: 66517 [2021-11-25 20:32:42,966 INFO L226 Difference]: Without dead ends: 33462 [2021-11-25 20:32:43,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:32:43,158 INFO L933 BasicCegarLoop]: 4297 mSDtfsCounter, 22 mSDsluCounter, 14005 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 18 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 17149 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:43,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 17149 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1620 Invalid, 4 Unknown, 0 Unchecked, 16.0s Time] [2021-11-25 20:32:43,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33462 states. [2021-11-25 20:32:45,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33462 to 33450. [2021-11-25 20:32:45,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33450 states, 19610 states have (on average 1.254156042835288) internal successors, (24594), 20483 states have internal predecessors, (24594), 11100 states have call successors, (11100), 2740 states have call predecessors, (11100), 2739 states have return successors, (11138), 10750 states have call predecessors, (11138), 11098 states have call successors, (11138) [2021-11-25 20:32:45,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33450 states to 33450 states and 46832 transitions. [2021-11-25 20:32:45,299 INFO L78 Accepts]: Start accepts. Automaton has 33450 states and 46832 transitions. Word has length 286 [2021-11-25 20:32:45,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:45,302 INFO L470 AbstractCegarLoop]: Abstraction has 33450 states and 46832 transitions. [2021-11-25 20:32:45,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (45), 4 states have call predecessors, (45), 2 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-25 20:32:45,302 INFO L276 IsEmpty]: Start isEmpty. Operand 33450 states and 46832 transitions. [2021-11-25 20:32:45,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-11-25 20:32:45,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:45,340 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:45,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:32:45,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:45,569 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:32:45,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:45,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1333515416, now seen corresponding path program 1 times [2021-11-25 20:32:45,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:45,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279987871] [2021-11-25 20:32:45,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:45,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2021-11-25 20:32:46,964 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:46,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279987871] [2021-11-25 20:32:46,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279987871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:46,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857201777] [2021-11-25 20:32:46,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:46,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:46,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:46,966 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:46,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:32:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:48,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 4435 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:32:49,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2021-11-25 20:32:49,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:32:49,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857201777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:49,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:32:49,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-11-25 20:32:49,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474959966] [2021-11-25 20:32:49,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:49,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:32:49,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:49,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:32:49,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:32:49,627 INFO L87 Difference]: Start difference. First operand 33450 states and 46832 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-25 20:32:51,661 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:32:55,473 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:32:57,680 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:33:01,713 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:33:05,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:33:05,233 INFO L93 Difference]: Finished difference Result 69434 states and 97121 transitions. [2021-11-25 20:33:05,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:33:05,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 324 [2021-11-25 20:33:05,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:33:05,410 INFO L225 Difference]: With dead ends: 69434 [2021-11-25 20:33:05,410 INFO L226 Difference]: Without dead ends: 35986 [2021-11-25 20:33:05,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:33:05,562 INFO L933 BasicCegarLoop]: 8206 mSDtfsCounter, 4602 mSDsluCounter, 13608 mSDsCounter, 0 mSdLazyCounter, 1871 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4602 SdHoareTripleChecker+Valid, 20693 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1871 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:33:05,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4602 Valid, 20693 Invalid, 1878 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4 Valid, 1871 Invalid, 3 Unknown, 0 Unchecked, 14.3s Time] [2021-11-25 20:33:05,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35986 states. [2021-11-25 20:33:07,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35986 to 33522. [2021-11-25 20:33:07,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33522 states, 19647 states have (on average 1.2537792029317454) internal successors, (24633), 20525 states have internal predecessors, (24633), 11120 states have call successors, (11120), 2755 states have call predecessors, (11120), 2754 states have return successors, (11158), 10765 states have call predecessors, (11158), 11118 states have call successors, (11158) [2021-11-25 20:33:07,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33522 states to 33522 states and 46911 transitions. [2021-11-25 20:33:07,881 INFO L78 Accepts]: Start accepts. Automaton has 33522 states and 46911 transitions. Word has length 324 [2021-11-25 20:33:07,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:33:07,882 INFO L470 AbstractCegarLoop]: Abstraction has 33522 states and 46911 transitions. [2021-11-25 20:33:07,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-25 20:33:07,883 INFO L276 IsEmpty]: Start isEmpty. Operand 33522 states and 46911 transitions. [2021-11-25 20:33:07,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-11-25 20:33:07,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:33:07,925 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:33:07,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:33:08,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:33:08,149 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:33:08,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:33:08,149 INFO L85 PathProgramCache]: Analyzing trace with hash -568405540, now seen corresponding path program 1 times [2021-11-25 20:33:08,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:33:08,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134695005] [2021-11-25 20:33:08,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:33:08,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:33:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:33:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-11-25 20:33:09,075 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:33:09,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134695005] [2021-11-25 20:33:09,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134695005] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:33:09,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621947796] [2021-11-25 20:33:09,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:33:09,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:33:09,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:33:09,078 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:33:09,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:33:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:33:11,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 4495 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-25 20:33:11,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:33:11,634 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 9 treesize of output 3 [2021-11-25 20:33:11,638 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 9 treesize of output 3 [2021-11-25 20:33:11,705 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 15 treesize of output 7 [2021-11-25 20:33:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-11-25 20:33:11,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:33:12,206 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 17 treesize of output 9 [2021-11-25 20:33:12,870 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-11-25 20:33:12,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621947796] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:33:12,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [602106458] [2021-11-25 20:33:12,903 INFO L159 IcfgInterpreter]: Started Sifa with 163 locations of interest [2021-11-25 20:33:12,904 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:33:12,912 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 20:33:12,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:33:12,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2021-11-25 20:33:12,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365128636] [2021-11-25 20:33:12,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:33:12,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 20:33:12,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:33:12,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 20:33:12,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:33:12,921 INFO L87 Difference]: Start difference. First operand 33522 states and 46911 transitions. Second operand has 15 states, 9 states have (on average 12.444444444444445) internal successors, (112), 11 states have internal predecessors, (112), 9 states have call successors, (47), 6 states have call predecessors, (47), 2 states have return successors, (37), 3 states have call predecessors, (37), 4 states have call successors, (37) [2021-11-25 20:33:14,957 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:33:23,446 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:33:25,305 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:33:27,332 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:33:29,364 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:33:31,402 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:33:33,667 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:33:35,179 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:33:48,016 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:33:49,326 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:33:52,885 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:33:54,083 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:33:55,167 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:33:57,188 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:34:01,032 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:34:02,387 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:34:04,731 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:34:05,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:34:05,702 INFO L93 Difference]: Finished difference Result 67801 states and 96170 transitions. [2021-11-25 20:34:05,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 20:34:05,704 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 9 states have (on average 12.444444444444445) internal successors, (112), 11 states have internal predecessors, (112), 9 states have call successors, (47), 6 states have call predecessors, (47), 2 states have return successors, (37), 3 states have call predecessors, (37), 4 states have call successors, (37) Word has length 331 [2021-11-25 20:34:05,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:34:06,023 INFO L225 Difference]: With dead ends: 67801 [2021-11-25 20:34:06,023 INFO L226 Difference]: Without dead ends: 34314 [2021-11-25 20:34:06,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 658 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-11-25 20:34:06,260 INFO L933 BasicCegarLoop]: 4295 mSDtfsCounter, 239 mSDsluCounter, 25337 mSDsCounter, 0 mSdLazyCounter, 5208 mSolverCounterSat, 137 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 27921 SdHoareTripleChecker+Invalid, 5352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 5208 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:34:06,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 27921 Invalid, 5352 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [137 Valid, 5208 Invalid, 7 Unknown, 0 Unchecked, 51.1s Time] [2021-11-25 20:34:06,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34314 states. [2021-11-25 20:34:08,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34314 to 34110. [2021-11-25 20:34:08,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34110 states, 20019 states have (on average 1.2580548478945002) internal successors, (25185), 20957 states have internal predecessors, (25185), 11300 states have call successors, (11300), 2779 states have call predecessors, (11300), 2790 states have return successors, (11434), 10933 states have call predecessors, (11434), 11298 states have call successors, (11434) [2021-11-25 20:34:08,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34110 states to 34110 states and 47919 transitions. [2021-11-25 20:34:08,550 INFO L78 Accepts]: Start accepts. Automaton has 34110 states and 47919 transitions. Word has length 331 [2021-11-25 20:34:08,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:34:08,552 INFO L470 AbstractCegarLoop]: Abstraction has 34110 states and 47919 transitions. [2021-11-25 20:34:08,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 9 states have (on average 12.444444444444445) internal successors, (112), 11 states have internal predecessors, (112), 9 states have call successors, (47), 6 states have call predecessors, (47), 2 states have return successors, (37), 3 states have call predecessors, (37), 4 states have call successors, (37) [2021-11-25 20:34:08,552 INFO L276 IsEmpty]: Start isEmpty. Operand 34110 states and 47919 transitions. [2021-11-25 20:34:08,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-11-25 20:34:08,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:34:08,587 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:34:08,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:34:08,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 20:34:08,816 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:34:08,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:34:08,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1789554128, now seen corresponding path program 1 times [2021-11-25 20:34:08,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:34:08,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346793389] [2021-11-25 20:34:08,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:08,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:34:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-11-25 20:34:09,772 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:34:09,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346793389] [2021-11-25 20:34:09,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346793389] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:34:09,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491212042] [2021-11-25 20:34:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:09,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:34:09,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:34:09,774 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:34:09,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:34:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:11,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 4668 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-25 20:34:11,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:34:12,516 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 9 treesize of output 3 [2021-11-25 20:34:12,579 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 15 treesize of output 7 [2021-11-25 20:34:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-11-25 20:34:12,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:34:13,033 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 17 treesize of output 9 [2021-11-25 20:34:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-11-25 20:34:13,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491212042] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:34:13,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1772074068] [2021-11-25 20:34:13,720 INFO L159 IcfgInterpreter]: Started Sifa with 175 locations of interest [2021-11-25 20:34:13,721 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:34:13,722 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 20:34:13,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:34:13,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2021-11-25 20:34:13,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711168639] [2021-11-25 20:34:13,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:34:13,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 20:34:13,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:34:13,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 20:34:13,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:34:13,728 INFO L87 Difference]: Start difference. First operand 34110 states and 47919 transitions. Second operand has 15 states, 9 states have (on average 12.666666666666666) internal successors, (114), 11 states have internal predecessors, (114), 9 states have call successors, (52), 6 states have call predecessors, (52), 2 states have return successors, (40), 3 states have call predecessors, (40), 4 states have call successors, (40) [2021-11-25 20:34:15,779 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:34:21,825 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:34:23,152 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:34:27,489 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:34:29,997 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:34:32,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:34:36,253 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:34:38,498 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:34:41,136 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:34:43,485 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:34:48,469 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:34:52,222 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:35:07,081 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:35:09,318 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:35:10,966 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:35:12,887 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:35:15,701 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:35:17,741 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:35:19,782 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:35:21,826 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:35:23,874 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:35:25,665 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:35:27,723 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:35:28,910 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:35:30,109 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:35:31,303 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:35:33,272 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:35:34,415 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:35:35,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:35:36,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:35:36,744 INFO L93 Difference]: Finished difference Result 68869 states and 98030 transitions. [2021-11-25 20:35:36,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 20:35:36,746 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 9 states have (on average 12.666666666666666) internal successors, (114), 11 states have internal predecessors, (114), 9 states have call successors, (52), 6 states have call predecessors, (52), 2 states have return successors, (40), 3 states have call predecessors, (40), 4 states have call successors, (40) Word has length 341 [2021-11-25 20:35:36,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:35:36,923 INFO L225 Difference]: With dead ends: 68869 [2021-11-25 20:35:36,924 INFO L226 Difference]: Without dead ends: 34794 [2021-11-25 20:35:37,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-25 20:35:37,326 INFO L933 BasicCegarLoop]: 4344 mSDtfsCounter, 169 mSDsluCounter, 42497 mSDsCounter, 0 mSdLazyCounter, 8212 mSolverCounterSat, 104 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 43950 SdHoareTripleChecker+Invalid, 8330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 8212 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:35:37,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 43950 Invalid, 8330 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [104 Valid, 8212 Invalid, 14 Unknown, 0 Unchecked, 81.4s Time] [2021-11-25 20:35:37,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34794 states. [2021-11-25 20:35:38,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34794 to 34602. [2021-11-25 20:35:38,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34602 states, 20343 states have (on average 1.2627930983630733) internal successors, (25689), 21329 states have internal predecessors, (25689), 11456 states have call successors, (11456), 2791 states have call predecessors, (11456), 2802 states have return successors, (11590), 11065 states have call predecessors, (11590), 11454 states have call successors, (11590) [2021-11-25 20:35:39,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34602 states to 34602 states and 48735 transitions. [2021-11-25 20:35:39,055 INFO L78 Accepts]: Start accepts. Automaton has 34602 states and 48735 transitions. Word has length 341 [2021-11-25 20:35:39,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:35:39,056 INFO L470 AbstractCegarLoop]: Abstraction has 34602 states and 48735 transitions. [2021-11-25 20:35:39,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 9 states have (on average 12.666666666666666) internal successors, (114), 11 states have internal predecessors, (114), 9 states have call successors, (52), 6 states have call predecessors, (52), 2 states have return successors, (40), 3 states have call predecessors, (40), 4 states have call successors, (40) [2021-11-25 20:35:39,057 INFO L276 IsEmpty]: Start isEmpty. Operand 34602 states and 48735 transitions. [2021-11-25 20:35:39,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-11-25 20:35:39,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:35:39,090 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:35:39,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:35:39,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-25 20:35:39,316 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:35:39,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:35:39,317 INFO L85 PathProgramCache]: Analyzing trace with hash -655250205, now seen corresponding path program 1 times [2021-11-25 20:35:39,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:35:39,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754929603] [2021-11-25 20:35:39,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:39,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:35:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2021-11-25 20:35:40,102 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:35:40,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754929603] [2021-11-25 20:35:40,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754929603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:35:40,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056304214] [2021-11-25 20:35:40,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:40,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:35:40,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:35:40,105 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:35:40,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:35:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:42,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 4339 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:35:42,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:35:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2021-11-25 20:35:42,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:35:42,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056304214] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:35:42,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:35:42,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-25 20:35:42,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131468673] [2021-11-25 20:35:42,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:35:42,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:35:42,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:35:42,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:35:42,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:35:42,762 INFO L87 Difference]: Start difference. First operand 34602 states and 48735 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 3 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-25 20:35:44,798 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:35:50,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:35:59,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:35:59,078 INFO L93 Difference]: Finished difference Result 80063 states and 112681 transitions. [2021-11-25 20:35:59,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:35:59,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 3 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 326 [2021-11-25 20:35:59,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:35:59,304 INFO L225 Difference]: With dead ends: 80063 [2021-11-25 20:35:59,304 INFO L226 Difference]: Without dead ends: 45496 [2021-11-25 20:35:59,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:35:59,426 INFO L933 BasicCegarLoop]: 6847 mSDtfsCounter, 4400 mSDsluCounter, 9033 mSDsCounter, 0 mSdLazyCounter, 3947 mSolverCounterSat, 55 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4427 SdHoareTripleChecker+Valid, 14977 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 3947 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:35:59,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4427 Valid, 14977 Invalid, 4004 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [55 Valid, 3947 Invalid, 2 Unknown, 0 Unchecked, 14.4s Time] [2021-11-25 20:35:59,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45496 states. [2021-11-25 20:36:01,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45496 to 44786. [2021-11-25 20:36:01,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44786 states, 26263 states have (on average 1.2607851349807715) internal successors, (33112), 27569 states have internal predecessors, (33112), 14804 states have call successors, (14804), 3703 states have call predecessors, (14804), 3718 states have return successors, (14982), 14285 states have call predecessors, (14982), 14802 states have call successors, (14982) [2021-11-25 20:36:01,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44786 states to 44786 states and 62898 transitions. [2021-11-25 20:36:01,707 INFO L78 Accepts]: Start accepts. Automaton has 44786 states and 62898 transitions. Word has length 326 [2021-11-25 20:36:01,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:36:01,708 INFO L470 AbstractCegarLoop]: Abstraction has 44786 states and 62898 transitions. [2021-11-25 20:36:01,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 3 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-25 20:36:01,709 INFO L276 IsEmpty]: Start isEmpty. Operand 44786 states and 62898 transitions. [2021-11-25 20:36:01,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-11-25 20:36:01,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:36:01,756 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:36:01,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:36:01,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 20:36:01,973 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:36:01,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:36:01,973 INFO L85 PathProgramCache]: Analyzing trace with hash -471514307, now seen corresponding path program 1 times [2021-11-25 20:36:01,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:36:01,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530065640] [2021-11-25 20:36:01,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:36:01,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:36:02,591 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:36:02,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052010440] [2021-11-25 20:36:02,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:36:02,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:36:02,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:36:02,594 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:36:02,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:36:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:36:04,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 4572 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:36:04,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:36:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2021-11-25 20:36:05,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:36:05,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:36:05,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530065640] [2021-11-25 20:36:05,068 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:36:05,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052010440] [2021-11-25 20:36:05,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052010440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:36:05,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:36:05,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:36:05,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875892252] [2021-11-25 20:36:05,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:36:05,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:36:05,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:36:05,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:36:05,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:36:05,071 INFO L87 Difference]: Start difference. First operand 44786 states and 62898 transitions. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-25 20:36:07,114 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:36:11,003 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:36:15,587 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:36:18,472 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:36:20,512 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:36:24,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:36:24,021 INFO L93 Difference]: Finished difference Result 93161 states and 131302 transitions. [2021-11-25 20:36:24,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:36:24,022 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 332 [2021-11-25 20:36:24,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:36:24,501 INFO L225 Difference]: With dead ends: 93161 [2021-11-25 20:36:24,502 INFO L226 Difference]: Without dead ends: 48410 [2021-11-25 20:36:24,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:36:24,670 INFO L933 BasicCegarLoop]: 4824 mSDtfsCounter, 1581 mSDsluCounter, 19450 mSDsCounter, 0 mSdLazyCounter, 2006 mSolverCounterSat, 401 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1633 SdHoareTripleChecker+Valid, 22718 SdHoareTripleChecker+Invalid, 2411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 2006 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:36:24,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1633 Valid, 22718 Invalid, 2411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 2006 Invalid, 4 Unknown, 0 Unchecked, 17.1s Time] [2021-11-25 20:36:24,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48410 states. [2021-11-25 20:36:26,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48410 to 44802. [2021-11-25 20:36:26,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44802 states, 26279 states have (on average 1.260626355645192) internal successors, (33128), 27585 states have internal predecessors, (33128), 14804 states have call successors, (14804), 3703 states have call predecessors, (14804), 3718 states have return successors, (14982), 14285 states have call predecessors, (14982), 14802 states have call successors, (14982) [2021-11-25 20:36:27,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44802 states to 44802 states and 62914 transitions. [2021-11-25 20:36:27,023 INFO L78 Accepts]: Start accepts. Automaton has 44802 states and 62914 transitions. Word has length 332 [2021-11-25 20:36:27,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:36:27,025 INFO L470 AbstractCegarLoop]: Abstraction has 44802 states and 62914 transitions. [2021-11-25 20:36:27,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-25 20:36:27,025 INFO L276 IsEmpty]: Start isEmpty. Operand 44802 states and 62914 transitions. [2021-11-25 20:36:27,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-11-25 20:36:27,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:36:27,055 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:36:27,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:36:27,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:36:27,272 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:36:27,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:36:27,273 INFO L85 PathProgramCache]: Analyzing trace with hash -96259964, now seen corresponding path program 1 times [2021-11-25 20:36:27,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:36:27,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416616173] [2021-11-25 20:36:27,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:36:27,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:36:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:36:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2021-11-25 20:36:28,082 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:36:28,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416616173] [2021-11-25 20:36:28,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416616173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:36:28,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510436689] [2021-11-25 20:36:28,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:36:28,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:36:28,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:36:28,085 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:36:28,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 20:36:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:36:30,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 4538 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 20:36:30,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:36:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2021-11-25 20:36:30,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:36:30,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510436689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:36:30,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:36:30,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2021-11-25 20:36:30,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576465389] [2021-11-25 20:36:30,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:36:30,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:36:30,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:36:30,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:36:30,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:36:30,961 INFO L87 Difference]: Start difference. First operand 44802 states and 62914 transitions. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 4 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (40), 4 states have call predecessors, (40), 4 states have call successors, (40) [2021-11-25 20:36:33,006 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:36:44,163 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:37:00,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:00,495 INFO L93 Difference]: Finished difference Result 109771 states and 153993 transitions. [2021-11-25 20:37:00,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:37:00,497 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 4 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (40), 4 states have call predecessors, (40), 4 states have call successors, (40) Word has length 345 [2021-11-25 20:37:00,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:00,779 INFO L225 Difference]: With dead ends: 109771 [2021-11-25 20:37:00,779 INFO L226 Difference]: Without dead ends: 65004 [2021-11-25 20:37:01,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:37:01,173 INFO L933 BasicCegarLoop]: 6830 mSDtfsCounter, 5268 mSDsluCounter, 17597 mSDsCounter, 0 mSdLazyCounter, 13915 mSolverCounterSat, 277 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5293 SdHoareTripleChecker+Valid, 22081 SdHoareTripleChecker+Invalid, 14193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 13915 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:01,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5293 Valid, 22081 Invalid, 14193 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [277 Valid, 13915 Invalid, 1 Unknown, 0 Unchecked, 26.9s Time] [2021-11-25 20:37:01,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65004 states. [2021-11-25 20:37:03,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65004 to 59252. [2021-11-25 20:37:04,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59252 states, 34555 states have (on average 1.256605411662567) internal successors, (43422), 36337 states have internal predecessors, (43422), 19674 states have call successors, (19674), 5001 states have call predecessors, (19674), 5022 states have return successors, (19918), 18967 states have call predecessors, (19918), 19672 states have call successors, (19918) [2021-11-25 20:37:04,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59252 states to 59252 states and 83014 transitions. [2021-11-25 20:37:04,367 INFO L78 Accepts]: Start accepts. Automaton has 59252 states and 83014 transitions. Word has length 345 [2021-11-25 20:37:04,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:04,368 INFO L470 AbstractCegarLoop]: Abstraction has 59252 states and 83014 transitions. [2021-11-25 20:37:04,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 4 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (40), 4 states have call predecessors, (40), 4 states have call successors, (40) [2021-11-25 20:37:04,368 INFO L276 IsEmpty]: Start isEmpty. Operand 59252 states and 83014 transitions. [2021-11-25 20:37:04,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-11-25 20:37:04,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:04,389 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:37:04,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:37:04,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:37:04,590 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:04,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:04,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1750422203, now seen corresponding path program 1 times [2021-11-25 20:37:04,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:04,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592235846] [2021-11-25 20:37:04,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:04,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 32 proven. 3 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2021-11-25 20:37:05,702 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:05,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592235846] [2021-11-25 20:37:05,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592235846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:37:05,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194566942] [2021-11-25 20:37:05,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:05,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:37:05,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:37:05,708 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:37:05,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 20:37:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:07,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 4639 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:37:07,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:37:08,158 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2021-11-25 20:37:08,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:37:08,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194566942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:08,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:37:08,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2021-11-25 20:37:08,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647741629] [2021-11-25 20:37:08,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:08,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:37:08,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:08,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:37:08,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-11-25 20:37:08,163 INFO L87 Difference]: Start difference. First operand 59252 states and 83014 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (55), 4 states have call predecessors, (55), 2 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) [2021-11-25 20:37:10,195 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:37:17,318 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:37:19,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:37:22,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:22,994 INFO L93 Difference]: Finished difference Result 118601 states and 167882 transitions. [2021-11-25 20:37:22,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:37:22,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (55), 4 states have call predecessors, (55), 2 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) Word has length 351 [2021-11-25 20:37:22,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:23,555 INFO L225 Difference]: With dead ends: 118601 [2021-11-25 20:37:23,555 INFO L226 Difference]: Without dead ends: 59384 [2021-11-25 20:37:23,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:37:23,798 INFO L933 BasicCegarLoop]: 4272 mSDtfsCounter, 44 mSDsluCounter, 13890 mSDsCounter, 0 mSdLazyCounter, 1621 mSolverCounterSat, 19 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 17010 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1621 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:23,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 17010 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1621 Invalid, 3 Unknown, 0 Unchecked, 12.5s Time] [2021-11-25 20:37:23,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59384 states. [2021-11-25 20:37:26,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59384 to 54322. [2021-11-25 20:37:26,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54322 states, 31711 states have (on average 1.2527514111822395) internal successors, (39726), 33333 states have internal predecessors, (39726), 18008 states have call successors, (18008), 4563 states have call predecessors, (18008), 4602 states have return successors, (18270), 17405 states have call predecessors, (18270), 18006 states have call successors, (18270) [2021-11-25 20:37:26,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54322 states to 54322 states and 76004 transitions. [2021-11-25 20:37:26,741 INFO L78 Accepts]: Start accepts. Automaton has 54322 states and 76004 transitions. Word has length 351 [2021-11-25 20:37:26,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:26,743 INFO L470 AbstractCegarLoop]: Abstraction has 54322 states and 76004 transitions. [2021-11-25 20:37:26,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (55), 4 states have call predecessors, (55), 2 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) [2021-11-25 20:37:26,743 INFO L276 IsEmpty]: Start isEmpty. Operand 54322 states and 76004 transitions. [2021-11-25 20:37:26,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-11-25 20:37:26,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:26,770 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:37:26,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:37:26,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 20:37:26,984 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:26,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:26,985 INFO L85 PathProgramCache]: Analyzing trace with hash -33080529, now seen corresponding path program 1 times [2021-11-25 20:37:26,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:26,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24759465] [2021-11-25 20:37:26,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:26,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:27,161 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:37:27,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637754488] [2021-11-25 20:37:27,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:27,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:37:27,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:37:27,164 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:37:27,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 20:37:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:29,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 4520 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:37:29,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:37:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2021-11-25 20:37:29,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:37:29,939 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:29,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24759465] [2021-11-25 20:37:29,940 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:37:29,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637754488] [2021-11-25 20:37:29,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637754488] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:29,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:29,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:37:29,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097872862] [2021-11-25 20:37:29,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:29,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:37:29,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:29,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:37:29,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:37:29,943 INFO L87 Difference]: Start difference. First operand 54322 states and 76004 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-25 20:37:31,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:37:37,960 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:37:42,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:42,622 INFO L93 Difference]: Finished difference Result 115934 states and 163257 transitions. [2021-11-25 20:37:42,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:37:42,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 342 [2021-11-25 20:37:42,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:42,923 INFO L225 Difference]: With dead ends: 115934 [2021-11-25 20:37:42,923 INFO L226 Difference]: Without dead ends: 61647 [2021-11-25 20:37:43,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:37:43,135 INFO L933 BasicCegarLoop]: 5271 mSDtfsCounter, 1257 mSDsluCounter, 10222 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 247 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 14703 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:43,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1407 Valid, 14703 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1239 Invalid, 2 Unknown, 0 Unchecked, 10.0s Time] [2021-11-25 20:37:43,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61647 states. [2021-11-25 20:37:46,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61647 to 54246. [2021-11-25 20:37:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54246 states, 31655 states have (on average 1.2523140104248933) internal successors, (39642), 33277 states have internal predecessors, (39642), 17988 states have call successors, (17988), 4563 states have call predecessors, (17988), 4602 states have return successors, (18250), 17385 states have call predecessors, (18250), 17986 states have call successors, (18250) [2021-11-25 20:37:46,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54246 states to 54246 states and 75880 transitions. [2021-11-25 20:37:46,728 INFO L78 Accepts]: Start accepts. Automaton has 54246 states and 75880 transitions. Word has length 342 [2021-11-25 20:37:46,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:46,731 INFO L470 AbstractCegarLoop]: Abstraction has 54246 states and 75880 transitions. [2021-11-25 20:37:46,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-25 20:37:46,731 INFO L276 IsEmpty]: Start isEmpty. Operand 54246 states and 75880 transitions. [2021-11-25 20:37:46,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2021-11-25 20:37:46,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:46,763 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:37:46,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:37:46,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 20:37:46,988 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:46,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:46,989 INFO L85 PathProgramCache]: Analyzing trace with hash -97248473, now seen corresponding path program 1 times [2021-11-25 20:37:46,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:46,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485662316] [2021-11-25 20:37:46,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:46,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:47,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2021-11-25 20:37:48,006 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:48,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485662316] [2021-11-25 20:37:48,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485662316] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:37:48,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142623717] [2021-11-25 20:37:48,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:48,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:37:48,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:37:48,008 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:37:48,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 20:37:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:49,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 4642 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 20:37:49,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:37:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2021-11-25 20:37:50,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:37:50,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142623717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:50,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:37:50,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2021-11-25 20:37:50,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688515516] [2021-11-25 20:37:50,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:50,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:37:50,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:50,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:37:50,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:37:50,776 INFO L87 Difference]: Start difference. First operand 54246 states and 75880 transitions. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 4 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) [2021-11-25 20:37:52,819 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:38:01,119 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:38:08,432 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:38:18,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:38:18,889 INFO L93 Difference]: Finished difference Result 122489 states and 171951 transitions. [2021-11-25 20:38:18,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:38:18,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 4 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) Word has length 360 [2021-11-25 20:38:18,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:38:19,518 INFO L225 Difference]: With dead ends: 122489 [2021-11-25 20:38:19,518 INFO L226 Difference]: Without dead ends: 68278 [2021-11-25 20:38:19,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-11-25 20:38:19,699 INFO L933 BasicCegarLoop]: 6851 mSDtfsCounter, 5082 mSDsluCounter, 24324 mSDsCounter, 0 mSdLazyCounter, 13699 mSolverCounterSat, 549 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5110 SdHoareTripleChecker+Valid, 28510 SdHoareTripleChecker+Invalid, 14251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 13699 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:38:19,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5110 Valid, 28510 Invalid, 14251 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [549 Valid, 13699 Invalid, 3 Unknown, 0 Unchecked, 25.3s Time] [2021-11-25 20:38:19,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68278 states. [2021-11-25 20:38:22,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68278 to 64218. [2021-11-25 20:38:22,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64218 states, 37455 states have (on average 1.2518755840341744) internal successors, (46889), 39393 states have internal predecessors, (46889), 21276 states have call successors, (21276), 5439 states have call predecessors, (21276), 5486 states have return successors, (21590), 20557 states have call predecessors, (21590), 21274 states have call successors, (21590) [2021-11-25 20:38:23,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64218 states to 64218 states and 89755 transitions. [2021-11-25 20:38:23,222 INFO L78 Accepts]: Start accepts. Automaton has 64218 states and 89755 transitions. Word has length 360 [2021-11-25 20:38:23,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:38:23,223 INFO L470 AbstractCegarLoop]: Abstraction has 64218 states and 89755 transitions. [2021-11-25 20:38:23,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 4 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) [2021-11-25 20:38:23,224 INFO L276 IsEmpty]: Start isEmpty. Operand 64218 states and 89755 transitions. [2021-11-25 20:38:23,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-11-25 20:38:23,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:38:23,244 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:38:23,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 20:38:23,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 20:38:23,445 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:38:23,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:38:23,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1176904841, now seen corresponding path program 1 times [2021-11-25 20:38:23,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:38:23,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859067474] [2021-11-25 20:38:23,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:38:23,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:38:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:38:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2021-11-25 20:38:24,710 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:38:24,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859067474] [2021-11-25 20:38:24,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859067474] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:38:24,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083195708] [2021-11-25 20:38:24,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:38:24,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:38:24,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:38:24,713 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:38:24,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4f2348-eabc-4e08-b77e-31db9a5e6689/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 20:38:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:38:26,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 4962 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:38:26,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:38:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2021-11-25 20:38:27,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:38:27,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083195708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:38:27,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:38:27,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2021-11-25 20:38:27,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857201455] [2021-11-25 20:38:27,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:38:27,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:38:27,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:38:27,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:38:27,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:38:27,437 INFO L87 Difference]: Start difference. First operand 64218 states and 89755 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 2 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2021-11-25 20:38:29,466 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:38:38,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:38:38,159 INFO L93 Difference]: Finished difference Result 191596 states and 272985 transitions. [2021-11-25 20:38:38,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:38:38,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 2 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) Word has length 378 [2021-11-25 20:38:38,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:38:39,304 INFO L225 Difference]: With dead ends: 191596 [2021-11-25 20:38:39,304 INFO L226 Difference]: Without dead ends: 127413 [2021-11-25 20:38:39,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:38:39,654 INFO L933 BasicCegarLoop]: 5404 mSDtfsCounter, 4527 mSDsluCounter, 4825 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4527 SdHoareTripleChecker+Valid, 9847 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:38:39,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4527 Valid, 9847 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 789 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2021-11-25 20:38:39,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127413 states.