./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-43_2a-drivers--net--wan--lmc--lmc.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--wan--lmc--lmc.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 66b2f104726c03e3846e38f6b09c6a45d6c8d058156e96895db9342600740310 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:17:54,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:17:54,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:17:54,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:17:54,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:17:54,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:17:54,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:17:54,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:17:54,768 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:17:54,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:17:54,771 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:17:54,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:17:54,774 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:17:54,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:17:54,782 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:17:54,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:17:54,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:17:54,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:17:54,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:17:54,807 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:17:54,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:17:54,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:17:54,821 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:17:54,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:17:54,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:17:54,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:17:54,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:17:54,835 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:17:54,836 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:17:54,838 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:17:54,838 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:17:54,839 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:17:54,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:17:54,843 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:17:54,845 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:17:54,845 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:17:54,846 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:17:54,846 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:17:54,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:17:54,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:17:54,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:17:54,849 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:17:54,887 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:17:54,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:17:54,888 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:17:54,888 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:17:54,889 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:17:54,890 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:17:54,890 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:17:54,890 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:17:54,890 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:17:54,891 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:17:54,891 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:17:54,891 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:17:54,892 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:17:54,892 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:17:54,892 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:17:54,892 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:17:54,893 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:17:54,893 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:17:54,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:17:54,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:17:54,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:17:54,895 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:17:54,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:17:54,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:17:54,896 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:17:54,896 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:17:54,896 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:17:54,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:17:54,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:17:54,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:17:54,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:17:54,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:17:54,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:17:54,898 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:17:54,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:17:54,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:17:54,899 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:17:54,899 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:17:54,900 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_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66b2f104726c03e3846e38f6b09c6a45d6c8d058156e96895db9342600740310 [2021-11-21 01:17:55,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:17:55,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:17:55,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:17:55,239 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:17:55,240 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:17:55,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--wan--lmc--lmc.ko-entry_point.cil.out.i [2021-11-21 01:17:55,330 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/data/147834d2a/b8ad9e70de38411283edaa490e546dbc/FLAGa177eb604 [2021-11-21 01:17:56,512 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:17:56,513 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--wan--lmc--lmc.ko-entry_point.cil.out.i [2021-11-21 01:17:56,571 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/data/147834d2a/b8ad9e70de38411283edaa490e546dbc/FLAGa177eb604 [2021-11-21 01:17:56,827 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/data/147834d2a/b8ad9e70de38411283edaa490e546dbc [2021-11-21 01:17:56,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:17:56,831 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:17:56,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:17:56,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:17:56,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:17:56,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:17:56" (1/1) ... [2021-11-21 01:17:56,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@205ba266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:56, skipping insertion in model container [2021-11-21 01:17:56,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:17:56" (1/1) ... [2021-11-21 01:17:56,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:17:57,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:17:59,606 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_77f943a8-25a8-4ed5-88a2-83baa8f52783/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--wan--lmc--lmc.ko-entry_point.cil.out.i[287455,287468] [2021-11-21 01:17:59,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:17:59,746 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:18:00,698 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_77f943a8-25a8-4ed5-88a2-83baa8f52783/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--wan--lmc--lmc.ko-entry_point.cil.out.i[287455,287468] [2021-11-21 01:18:00,708 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:18:00,884 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:18:00,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:00 WrapperNode [2021-11-21 01:18:00,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:18:00,887 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:18:00,887 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:18:00,887 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:18:00,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:00" (1/1) ... [2021-11-21 01:18:01,044 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:00" (1/1) ... [2021-11-21 01:18:01,280 INFO L137 Inliner]: procedures = 274, calls = 2121, calls flagged for inlining = 123, calls inlined = 120, statements flattened = 4342 [2021-11-21 01:18:01,281 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:18:01,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:18:01,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:18:01,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:18:01,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:00" (1/1) ... [2021-11-21 01:18:01,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:00" (1/1) ... [2021-11-21 01:18:01,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:00" (1/1) ... [2021-11-21 01:18:01,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:00" (1/1) ... [2021-11-21 01:18:01,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:00" (1/1) ... [2021-11-21 01:18:01,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:00" (1/1) ... [2021-11-21 01:18:01,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:00" (1/1) ... [2021-11-21 01:18:01,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:18:01,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:18:01,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:18:01,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:18:01,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:00" (1/1) ... [2021-11-21 01:18:01,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:18:01,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:18:01,660 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:18:01,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:18:01,716 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_running_reset [2021-11-21 01:18:01,716 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_running_reset [2021-11-21 01:18:01,716 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_open [2021-11-21 01:18:01,716 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_open [2021-11-21 01:18:01,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-21 01:18:01,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-21 01:18:01,717 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-21 01:18:01,717 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-21 01:18:01,717 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-21 01:18:01,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-21 01:18:01,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-21 01:18:01,718 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-21 01:18:01,718 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_dec_reset [2021-11-21 01:18:01,718 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_dec_reset [2021-11-21 01:18:01,718 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_ssi_get_link_status [2021-11-21 01:18:01,718 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_ssi_get_link_status [2021-11-21 01:18:01,718 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-21 01:18:01,719 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-21 01:18:01,719 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-21 01:18:01,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-21 01:18:01,719 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-21 01:18:01,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-21 01:18:01,719 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_t1_set_circuit_type [2021-11-21 01:18:01,719 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_t1_set_circuit_type [2021-11-21 01:18:01,720 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_gpio_mkinput [2021-11-21 01:18:01,720 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_gpio_mkinput [2021-11-21 01:18:01,720 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-21 01:18:01,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-21 01:18:01,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-21 01:18:01,720 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-21 01:18:01,721 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:18:01,721 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:18:01,721 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_ds3_set_100ft [2021-11-21 01:18:01,721 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_ds3_set_100ft [2021-11-21 01:18:01,721 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-21 01:18:01,721 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-21 01:18:01,722 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-21 01:18:01,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-21 01:18:01,722 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_ds3_set_scram [2021-11-21 01:18:01,722 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_ds3_set_scram [2021-11-21 01:18:01,722 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_change_mtu [2021-11-21 01:18:01,722 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_change_mtu [2021-11-21 01:18:01,722 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_proto_close [2021-11-21 01:18:01,723 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_proto_close [2021-11-21 01:18:01,723 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_gpio_mkoutput [2021-11-21 01:18:01,723 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_gpio_mkoutput [2021-11-21 01:18:01,723 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_reset [2021-11-21 01:18:01,723 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_reset [2021-11-21 01:18:01,723 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-21 01:18:01,723 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-21 01:18:01,724 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_get_stats [2021-11-21 01:18:01,724 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_get_stats [2021-11-21 01:18:01,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:18:01,724 INFO L130 BoogieDeclarations]: Found specification of procedure dev_to_sc [2021-11-21 01:18:01,724 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_to_sc [2021-11-21 01:18:01,724 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_driver_timeout [2021-11-21 01:18:01,724 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_driver_timeout [2021-11-21 01:18:01,725 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_proto_netif [2021-11-21 01:18:01,725 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_proto_netif [2021-11-21 01:18:01,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:18:01,725 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-21 01:18:01,725 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-21 01:18:01,725 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-21 01:18:01,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-21 01:18:01,726 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-21 01:18:01,726 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-21 01:18:01,726 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_trace [2021-11-21 01:18:01,726 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_trace [2021-11-21 01:18:01,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:18:01,726 INFO L130 BoogieDeclarations]: Found specification of procedure write_av9110 [2021-11-21 01:18:01,727 INFO L138 BoogieDeclarations]: Found implementation of procedure write_av9110 [2021-11-21 01:18:01,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:18:01,727 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-11-21 01:18:01,727 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-11-21 01:18:01,727 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2021-11-21 01:18:01,727 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2021-11-21 01:18:01,727 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-21 01:18:01,728 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-21 01:18:01,728 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_proto_type [2021-11-21 01:18:01,728 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_proto_type [2021-11-21 01:18:01,728 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-21 01:18:01,728 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-21 01:18:01,728 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_remove_one [2021-11-21 01:18:01,728 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_remove_one [2021-11-21 01:18:01,729 INFO L130 BoogieDeclarations]: Found specification of procedure outl [2021-11-21 01:18:01,729 INFO L138 BoogieDeclarations]: Found implementation of procedure outl [2021-11-21 01:18:01,729 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_t1_write [2021-11-21 01:18:01,729 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_t1_write [2021-11-21 01:18:01,729 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_close [2021-11-21 01:18:01,729 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_close [2021-11-21 01:18:01,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-21 01:18:01,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-21 01:18:01,730 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_led_off [2021-11-21 01:18:01,730 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_led_off [2021-11-21 01:18:01,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:18:01,730 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-21 01:18:01,730 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-21 01:18:01,730 INFO L130 BoogieDeclarations]: Found specification of procedure dev_to_hdlc [2021-11-21 01:18:01,731 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_to_hdlc [2021-11-21 01:18:01,731 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-21 01:18:01,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-21 01:18:01,731 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-21 01:18:01,731 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-21 01:18:01,731 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_softreset [2021-11-21 01:18:01,731 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_softreset [2021-11-21 01:18:01,732 INFO L130 BoogieDeclarations]: Found specification of procedure write_av9110_bit [2021-11-21 01:18:01,732 INFO L138 BoogieDeclarations]: Found implementation of procedure write_av9110_bit [2021-11-21 01:18:01,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:18:01,732 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-21 01:18:01,732 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-21 01:18:01,732 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-21 01:18:01,732 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-21 01:18:01,733 INFO L130 BoogieDeclarations]: Found specification of procedure dev_alloc_skb [2021-11-21 01:18:01,733 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_alloc_skb [2021-11-21 01:18:01,733 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-21 01:18:01,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-21 01:18:01,733 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_mii_writereg [2021-11-21 01:18:01,733 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_mii_writereg [2021-11-21 01:18:01,733 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_ioctl [2021-11-21 01:18:01,734 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_ioctl [2021-11-21 01:18:01,734 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-21 01:18:01,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-21 01:18:01,734 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_proto_attach [2021-11-21 01:18:01,734 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_proto_attach [2021-11-21 01:18:01,734 INFO L130 BoogieDeclarations]: Found specification of procedure virt_to_phys [2021-11-21 01:18:01,734 INFO L138 BoogieDeclarations]: Found implementation of procedure virt_to_phys [2021-11-21 01:18:01,735 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_ssi_set_status [2021-11-21 01:18:01,735 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_ssi_set_status [2021-11-21 01:18:01,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:18:01,735 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-21 01:18:01,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-21 01:18:01,735 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-21 01:18:01,735 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-21 01:18:01,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:18:01,736 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-21 01:18:01,736 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-21 01:18:01,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:18:01,736 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_mii_readreg [2021-11-21 01:18:01,736 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_mii_readreg [2021-11-21 01:18:01,736 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2021-11-21 01:18:01,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2021-11-21 01:18:01,737 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_2 [2021-11-21 01:18:01,737 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_2 [2021-11-21 01:18:01,737 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-21 01:18:01,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-21 01:18:01,737 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-21 01:18:01,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-21 01:18:01,737 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_proto_open [2021-11-21 01:18:01,738 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_proto_open [2021-11-21 01:18:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-21 01:18:01,738 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-21 01:18:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_led_on [2021-11-21 01:18:01,738 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_led_on [2021-11-21 01:18:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure inl [2021-11-21 01:18:01,738 INFO L138 BoogieDeclarations]: Found implementation of procedure inl [2021-11-21 01:18:01,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:18:01,739 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_set_protocol [2021-11-21 01:18:01,739 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_set_protocol [2021-11-21 01:18:01,739 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2021-11-21 01:18:01,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2021-11-21 01:18:01,739 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reset_mac_header [2021-11-21 01:18:01,739 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reset_mac_header [2021-11-21 01:18:01,740 INFO L130 BoogieDeclarations]: Found specification of procedure skb_tail_pointer [2021-11-21 01:18:01,740 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_tail_pointer [2021-11-21 01:18:01,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:18:01,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:18:01,740 INFO L130 BoogieDeclarations]: Found specification of procedure cpu_relax [2021-11-21 01:18:01,740 INFO L138 BoogieDeclarations]: Found implementation of procedure cpu_relax [2021-11-21 01:18:02,632 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:18:02,635 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:18:03,830 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-21 01:18:09,357 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:18:10,838 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:18:10,838 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 01:18:10,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:18:10 BoogieIcfgContainer [2021-11-21 01:18:10,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:18:10,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:18:10,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:18:10,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:18:10,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:17:56" (1/3) ... [2021-11-21 01:18:10,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2858e928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:18:10, skipping insertion in model container [2021-11-21 01:18:10,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:00" (2/3) ... [2021-11-21 01:18:10,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2858e928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:18:10, skipping insertion in model container [2021-11-21 01:18:10,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:18:10" (3/3) ... [2021-11-21 01:18:10,854 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--wan--lmc--lmc.ko-entry_point.cil.out.i [2021-11-21 01:18:10,860 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:18:10,861 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:18:10,933 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:18:10,941 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 [2021-11-21 01:18:10,941 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:18:11,006 INFO L276 IsEmpty]: Start isEmpty. Operand has 1446 states, 806 states have (on average 1.3064516129032258) internal successors, (1053), 854 states have internal predecessors, (1053), 563 states have call successors, (563), 76 states have call predecessors, (563), 75 states have return successors, (557), 542 states have call predecessors, (557), 557 states have call successors, (557) [2021-11-21 01:18:11,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-21 01:18:11,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:18:11,033 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-11-21 01:18:11,034 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:18:11,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:18:11,047 INFO L85 PathProgramCache]: Analyzing trace with hash -711981477, now seen corresponding path program 1 times [2021-11-21 01:18:11,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:18:11,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563185027] [2021-11-21 01:18:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:11,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:18:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-21 01:18:11,836 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:18:11,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563185027] [2021-11-21 01:18:11,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563185027] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:18:11,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:18:11,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:18:11,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413238615] [2021-11-21 01:18:11,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:18:11,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:18:11,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:18:11,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:18:11,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:18:11,888 INFO L87 Difference]: Start difference. First operand has 1446 states, 806 states have (on average 1.3064516129032258) internal successors, (1053), 854 states have internal predecessors, (1053), 563 states have call successors, (563), 76 states have call predecessors, (563), 75 states have return successors, (557), 542 states have call predecessors, (557), 557 states have call successors, (557) Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-21 01:18:14,777 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:18:16,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:18:16,589 INFO L93 Difference]: Finished difference Result 4253 states and 6466 transitions. [2021-11-21 01:18:16,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:18:16,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 72 [2021-11-21 01:18:16,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:18:16,684 INFO L225 Difference]: With dead ends: 4253 [2021-11-21 01:18:16,684 INFO L226 Difference]: Without dead ends: 2805 [2021-11-21 01:18:16,727 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 [2021-11-21 01:18:16,732 INFO L933 BasicCegarLoop]: 2662 mSDtfsCounter, 2076 mSDsluCounter, 2139 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2076 SdHoareTripleChecker+Valid, 4608 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:18:16,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2076 Valid, 4608 Invalid, 428 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4 Valid, 423 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-11-21 01:18:16,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2021-11-21 01:18:17,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2802. [2021-11-21 01:18:17,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 1567 states have (on average 1.2967453733248244) internal successors, (2032), 1645 states have internal predecessors, (2032), 1087 states have call successors, (1087), 148 states have call predecessors, (1087), 147 states have return successors, (1086), 1056 states have call predecessors, (1086), 1086 states have call successors, (1086) [2021-11-21 01:18:17,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 4205 transitions. [2021-11-21 01:18:17,230 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 4205 transitions. Word has length 72 [2021-11-21 01:18:17,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:18:17,232 INFO L470 AbstractCegarLoop]: Abstraction has 2802 states and 4205 transitions. [2021-11-21 01:18:17,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-21 01:18:17,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 4205 transitions. [2021-11-21 01:18:17,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-21 01:18:17,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:18:17,255 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-21 01:18:17,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:18:17,255 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:18:17,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:18:17,262 INFO L85 PathProgramCache]: Analyzing trace with hash 468587706, now seen corresponding path program 1 times [2021-11-21 01:18:17,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:18:17,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544138928] [2021-11-21 01:18:17,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:17,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:18:17,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-21 01:18:17,671 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:18:17,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544138928] [2021-11-21 01:18:17,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544138928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:18:17,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:18:17,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:18:17,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250928201] [2021-11-21 01:18:17,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:18:17,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:18:17,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:18:17,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:18:17,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:18:17,685 INFO L87 Difference]: Start difference. First operand 2802 states and 4205 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 01:18:20,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:18:20,475 INFO L93 Difference]: Finished difference Result 4666 states and 6995 transitions. [2021-11-21 01:18:20,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:18:20,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 93 [2021-11-21 01:18:20,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:18:20,552 INFO L225 Difference]: With dead ends: 4666 [2021-11-21 01:18:20,552 INFO L226 Difference]: Without dead ends: 4663 [2021-11-21 01:18:20,563 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 [2021-11-21 01:18:20,567 INFO L933 BasicCegarLoop]: 2912 mSDtfsCounter, 1853 mSDsluCounter, 1661 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1853 SdHoareTripleChecker+Valid, 4426 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:18:20,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1853 Valid, 4426 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-21 01:18:20,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4663 states. [2021-11-21 01:18:20,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4663 to 4635. [2021-11-21 01:18:20,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4635 states, 2564 states have (on average 1.2854914196567864) internal successors, (3296), 2702 states have internal predecessors, (3296), 1815 states have call successors, (1815), 258 states have call predecessors, (1815), 255 states have return successors, (1838), 1754 states have call predecessors, (1838), 1814 states have call successors, (1838) [2021-11-21 01:18:21,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4635 states to 4635 states and 6949 transitions. [2021-11-21 01:18:21,020 INFO L78 Accepts]: Start accepts. Automaton has 4635 states and 6949 transitions. Word has length 93 [2021-11-21 01:18:21,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:18:21,024 INFO L470 AbstractCegarLoop]: Abstraction has 4635 states and 6949 transitions. [2021-11-21 01:18:21,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 01:18:21,024 INFO L276 IsEmpty]: Start isEmpty. Operand 4635 states and 6949 transitions. [2021-11-21 01:18:21,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-21 01:18:21,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:18:21,055 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:18:21,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:18:21,055 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:18:21,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:18:21,056 INFO L85 PathProgramCache]: Analyzing trace with hash -638307249, now seen corresponding path program 1 times [2021-11-21 01:18:21,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:18:21,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956559701] [2021-11-21 01:18:21,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:21,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:18:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:21,349 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-21 01:18:21,349 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:18:21,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956559701] [2021-11-21 01:18:21,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956559701] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:18:21,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:18:21,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:18:21,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643841182] [2021-11-21 01:18:21,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:18:21,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:18:21,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:18:21,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:18:21,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:18:21,353 INFO L87 Difference]: Start difference. First operand 4635 states and 6949 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-21 01:18:24,050 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:18:28,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:18:28,570 INFO L93 Difference]: Finished difference Result 13734 states and 20639 transitions. [2021-11-21 01:18:28,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:18:28,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 140 [2021-11-21 01:18:28,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:18:28,746 INFO L225 Difference]: With dead ends: 13734 [2021-11-21 01:18:28,746 INFO L226 Difference]: Without dead ends: 9125 [2021-11-21 01:18:28,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:18:28,834 INFO L933 BasicCegarLoop]: 2624 mSDtfsCounter, 2071 mSDsluCounter, 7789 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2075 SdHoareTripleChecker+Valid, 9804 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:18:28,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2075 Valid, 9804 Invalid, 849 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 845 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2021-11-21 01:18:28,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9125 states. [2021-11-21 01:18:29,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9125 to 9097. [2021-11-21 01:18:29,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9097 states, 5039 states have (on average 1.2885493153403453) internal successors, (6493), 5320 states have internal predecessors, (6493), 3558 states have call successors, (3558), 504 states have call predecessors, (3558), 499 states have return successors, (3629), 3432 states have call predecessors, (3629), 3557 states have call successors, (3629) [2021-11-21 01:18:29,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9097 states to 9097 states and 13680 transitions. [2021-11-21 01:18:29,950 INFO L78 Accepts]: Start accepts. Automaton has 9097 states and 13680 transitions. Word has length 140 [2021-11-21 01:18:29,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:18:29,951 INFO L470 AbstractCegarLoop]: Abstraction has 9097 states and 13680 transitions. [2021-11-21 01:18:29,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-21 01:18:29,952 INFO L276 IsEmpty]: Start isEmpty. Operand 9097 states and 13680 transitions. [2021-11-21 01:18:29,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-21 01:18:29,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:18:29,973 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:18:29,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:18:29,974 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:18:29,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:18:29,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1581290409, now seen corresponding path program 1 times [2021-11-21 01:18:29,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:18:29,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551994702] [2021-11-21 01:18:29,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:29,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:18:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:30,263 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-21 01:18:30,264 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:18:30,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551994702] [2021-11-21 01:18:30,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551994702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:18:30,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:18:30,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:18:30,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450766208] [2021-11-21 01:18:30,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:18:30,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:18:30,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:18:30,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:18:30,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:18:30,268 INFO L87 Difference]: Start difference. First operand 9097 states and 13680 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-21 01:18:34,005 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:18:38,990 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:18:40,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:18:40,159 INFO L93 Difference]: Finished difference Result 22703 states and 34163 transitions. [2021-11-21 01:18:40,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:18:40,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 139 [2021-11-21 01:18:40,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:18:40,364 INFO L225 Difference]: With dead ends: 22703 [2021-11-21 01:18:40,364 INFO L226 Difference]: Without dead ends: 13632 [2021-11-21 01:18:40,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:18:40,488 INFO L933 BasicCegarLoop]: 2493 mSDtfsCounter, 2108 mSDsluCounter, 7508 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2112 SdHoareTripleChecker+Valid, 9411 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:18:40,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2112 Valid, 9411 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 814 Invalid, 2 Unknown, 0 Unchecked, 8.9s Time] [2021-11-21 01:18:40,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13632 states. [2021-11-21 01:18:41,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13632 to 13599. [2021-11-21 01:18:41,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13599 states, 7538 states have (on average 1.2888033961262935) internal successors, (9715), 7961 states have internal predecessors, (9715), 5314 states have call successors, (5314), 753 states have call predecessors, (5314), 746 states have return successors, (5433), 5124 states have call predecessors, (5433), 5313 states have call successors, (5433) [2021-11-21 01:18:41,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13599 states to 13599 states and 20462 transitions. [2021-11-21 01:18:41,798 INFO L78 Accepts]: Start accepts. Automaton has 13599 states and 20462 transitions. Word has length 139 [2021-11-21 01:18:41,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:18:41,803 INFO L470 AbstractCegarLoop]: Abstraction has 13599 states and 20462 transitions. [2021-11-21 01:18:41,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-21 01:18:41,804 INFO L276 IsEmpty]: Start isEmpty. Operand 13599 states and 20462 transitions. [2021-11-21 01:18:41,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-21 01:18:41,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:18:41,825 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:18:41,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:18:41,825 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:18:41,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:18:41,827 INFO L85 PathProgramCache]: Analyzing trace with hash 97298540, now seen corresponding path program 1 times [2021-11-21 01:18:41,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:18:41,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259873459] [2021-11-21 01:18:41,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:41,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:18:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-21 01:18:42,073 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:18:42,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259873459] [2021-11-21 01:18:42,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259873459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:18:42,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:18:42,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:18:42,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892443538] [2021-11-21 01:18:42,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:18:42,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:18:42,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:18:42,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:18:42,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:18:42,077 INFO L87 Difference]: Start difference. First operand 13599 states and 20462 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-21 01:18:45,598 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:18:48,425 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:18:53,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:18:53,014 INFO L93 Difference]: Finished difference Result 36193 states and 54480 transitions. [2021-11-21 01:18:53,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:18:53,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 138 [2021-11-21 01:18:53,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:18:53,223 INFO L225 Difference]: With dead ends: 36193 [2021-11-21 01:18:53,223 INFO L226 Difference]: Without dead ends: 22620 [2021-11-21 01:18:53,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:18:53,347 INFO L933 BasicCegarLoop]: 2490 mSDtfsCounter, 2111 mSDsluCounter, 7504 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2115 SdHoareTripleChecker+Valid, 9404 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:18:53,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2115 Valid, 9404 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 817 Invalid, 2 Unknown, 0 Unchecked, 9.4s Time] [2021-11-21 01:18:53,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22620 states. [2021-11-21 01:18:55,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22620 to 22531. [2021-11-21 01:18:55,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22531 states, 12488 states have (on average 1.2900384368994235) internal successors, (16110), 13206 states have internal predecessors, (16110), 8807 states have call successors, (8807), 1246 states have call predecessors, (8807), 1235 states have return successors, (9022), 8478 states have call predecessors, (9022), 8806 states have call successors, (9022) [2021-11-21 01:18:55,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22531 states to 22531 states and 33939 transitions. [2021-11-21 01:18:55,816 INFO L78 Accepts]: Start accepts. Automaton has 22531 states and 33939 transitions. Word has length 138 [2021-11-21 01:18:55,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:18:55,817 INFO L470 AbstractCegarLoop]: Abstraction has 22531 states and 33939 transitions. [2021-11-21 01:18:55,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-21 01:18:55,817 INFO L276 IsEmpty]: Start isEmpty. Operand 22531 states and 33939 transitions. [2021-11-21 01:18:55,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-21 01:18:55,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:18:55,868 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:18:55,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:18:55,869 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:18:55,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:18:55,870 INFO L85 PathProgramCache]: Analyzing trace with hash -30967334, now seen corresponding path program 1 times [2021-11-21 01:18:55,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:18:55,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473973555] [2021-11-21 01:18:55,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:55,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:18:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-21 01:18:56,090 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:18:56,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473973555] [2021-11-21 01:18:56,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473973555] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:18:56,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:18:56,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:18:56,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305067444] [2021-11-21 01:18:56,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:18:56,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:18:56,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:18:56,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:18:56,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:18:56,094 INFO L87 Difference]: Start difference. First operand 22531 states and 33939 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-21 01:19:02,830 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:19:03,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:19:03,546 INFO L93 Difference]: Finished difference Result 41319 states and 62020 transitions. [2021-11-21 01:19:03,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:19:03,558 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 141 [2021-11-21 01:19:03,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:19:03,818 INFO L225 Difference]: With dead ends: 41319 [2021-11-21 01:19:03,818 INFO L226 Difference]: Without dead ends: 22114 [2021-11-21 01:19:03,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:19:03,986 INFO L933 BasicCegarLoop]: 2493 mSDtfsCounter, 2105 mSDsluCounter, 7508 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2109 SdHoareTripleChecker+Valid, 9411 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:19:03,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2109 Valid, 9411 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 815 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2021-11-21 01:19:04,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22114 states. [2021-11-21 01:19:05,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22114 to 22059. [2021-11-21 01:19:05,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22059 states, 12192 states have (on average 1.2875656167979002) internal successors, (15698), 12890 states have internal predecessors, (15698), 8649 states have call successors, (8649), 1226 states have call predecessors, (8649), 1217 states have return successors, (8860), 8328 states have call predecessors, (8860), 8648 states have call successors, (8860) [2021-11-21 01:19:06,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22059 states to 22059 states and 33207 transitions. [2021-11-21 01:19:06,439 INFO L78 Accepts]: Start accepts. Automaton has 22059 states and 33207 transitions. Word has length 141 [2021-11-21 01:19:06,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:19:06,445 INFO L470 AbstractCegarLoop]: Abstraction has 22059 states and 33207 transitions. [2021-11-21 01:19:06,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-21 01:19:06,447 INFO L276 IsEmpty]: Start isEmpty. Operand 22059 states and 33207 transitions. [2021-11-21 01:19:06,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-21 01:19:06,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:19:06,510 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 01:19:06,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:19:06,511 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:19:06,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:19:06,512 INFO L85 PathProgramCache]: Analyzing trace with hash -302950474, now seen corresponding path program 1 times [2021-11-21 01:19:06,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:19:06,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263976411] [2021-11-21 01:19:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:19:06,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:19:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:19:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-21 01:19:06,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:19:06,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263976411] [2021-11-21 01:19:06,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263976411] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:19:06,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073680124] [2021-11-21 01:19:06,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:19:06,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:19:06,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:19:07,002 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:19:07,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:19:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:19:08,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 2257 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:19:08,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:19:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-21 01:19:08,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:19:08,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073680124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:19:08,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:19:08,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-21 01:19:08,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848337741] [2021-11-21 01:19:08,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:19:08,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:19:08,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:19:08,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:19:08,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:19:08,580 INFO L87 Difference]: Start difference. First operand 22059 states and 33207 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 5 states have internal predecessors, (72), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 01:19:11,752 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:19:20,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:19:20,353 INFO L93 Difference]: Finished difference Result 48684 states and 73266 transitions. [2021-11-21 01:19:20,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:19:20,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 5 states have internal predecessors, (72), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 151 [2021-11-21 01:19:20,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:19:20,685 INFO L225 Difference]: With dead ends: 48684 [2021-11-21 01:19:20,686 INFO L226 Difference]: Without dead ends: 35091 [2021-11-21 01:19:21,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:19:21,021 INFO L933 BasicCegarLoop]: 2770 mSDtfsCounter, 2100 mSDsluCounter, 14166 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2104 SdHoareTripleChecker+Valid, 15798 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:19:21,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2104 Valid, 15798 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1437 Invalid, 1 Unknown, 0 Unchecked, 10.1s Time] [2021-11-21 01:19:21,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35091 states. [2021-11-21 01:19:23,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35091 to 34971. [2021-11-21 01:19:23,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34971 states, 19323 states have (on average 1.288154013351964) internal successors, (24891), 20448 states have internal predecessors, (24891), 13714 states have call successors, (13714), 1940 states have call predecessors, (13714), 1933 states have return successors, (14079), 13194 states have call predecessors, (14079), 13713 states have call successors, (14079) [2021-11-21 01:19:24,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34971 states to 34971 states and 52684 transitions. [2021-11-21 01:19:24,233 INFO L78 Accepts]: Start accepts. Automaton has 34971 states and 52684 transitions. Word has length 151 [2021-11-21 01:19:24,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:19:24,234 INFO L470 AbstractCegarLoop]: Abstraction has 34971 states and 52684 transitions. [2021-11-21 01:19:24,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 5 states have internal predecessors, (72), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 01:19:24,235 INFO L276 IsEmpty]: Start isEmpty. Operand 34971 states and 52684 transitions. [2021-11-21 01:19:24,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-21 01:19:24,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:19:24,305 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 01:19:24,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:19:24,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:19:24,518 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:19:24,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:19:24,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1524298384, now seen corresponding path program 1 times [2021-11-21 01:19:24,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:19:24,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805129622] [2021-11-21 01:19:24,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:19:24,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:19:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:19:24,796 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-21 01:19:24,796 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:19:24,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805129622] [2021-11-21 01:19:24,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805129622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:19:24,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643948535] [2021-11-21 01:19:24,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:19:24,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:19:24,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:19:24,802 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:19:24,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:19:26,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:19:26,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 2259 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:19:26,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:19:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-21 01:19:26,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:19:26,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643948535] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:19:26,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:19:26,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-21 01:19:26,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172016211] [2021-11-21 01:19:26,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:19:26,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:19:26,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:19:26,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:19:26,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:19:26,557 INFO L87 Difference]: Start difference. First operand 34971 states and 52684 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 01:19:29,650 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:19:35,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:19:35,311 INFO L93 Difference]: Finished difference Result 74542 states and 112250 transitions. [2021-11-21 01:19:35,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:19:35,317 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 152 [2021-11-21 01:19:35,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:19:35,836 INFO L225 Difference]: With dead ends: 74542 [2021-11-21 01:19:35,836 INFO L226 Difference]: Without dead ends: 48037 [2021-11-21 01:19:36,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:19:36,067 INFO L933 BasicCegarLoop]: 2776 mSDtfsCounter, 2100 mSDsluCounter, 14174 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2104 SdHoareTripleChecker+Valid, 15816 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:19:36,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2104 Valid, 15816 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1434 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2021-11-21 01:19:36,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48037 states. [2021-11-21 01:19:38,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48037 to 47891. [2021-11-21 01:19:38,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47891 states, 26458 states have (on average 1.2883815859097438) internal successors, (34088), 28018 states have internal predecessors, (34088), 18779 states have call successors, (18779), 2654 states have call predecessors, (18779), 2653 states have return successors, (19302), 18056 states have call predecessors, (19302), 18778 states have call successors, (19302) [2021-11-21 01:19:39,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47891 states to 47891 states and 72169 transitions. [2021-11-21 01:19:39,931 INFO L78 Accepts]: Start accepts. Automaton has 47891 states and 72169 transitions. Word has length 152 [2021-11-21 01:19:39,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:19:39,932 INFO L470 AbstractCegarLoop]: Abstraction has 47891 states and 72169 transitions. [2021-11-21 01:19:39,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 01:19:39,933 INFO L276 IsEmpty]: Start isEmpty. Operand 47891 states and 72169 transitions. [2021-11-21 01:19:39,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-21 01:19:39,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:19:39,997 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 01:19:40,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:19:40,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:19:40,226 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:19:40,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:19:40,227 INFO L85 PathProgramCache]: Analyzing trace with hash 717257789, now seen corresponding path program 1 times [2021-11-21 01:19:40,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:19:40,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599829793] [2021-11-21 01:19:40,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:19:40,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:19:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:19:40,506 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-21 01:19:40,506 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:19:40,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599829793] [2021-11-21 01:19:40,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599829793] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:19:40,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151008179] [2021-11-21 01:19:40,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:19:40,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:19:40,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:19:40,514 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:19:40,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:19:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:19:41,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 2261 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:19:41,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:19:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-21 01:19:41,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:19:41,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151008179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:19:41,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:19:41,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-21 01:19:41,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188342614] [2021-11-21 01:19:41,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:19:41,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:19:41,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:19:41,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:19:41,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:19:41,859 INFO L87 Difference]: Start difference. First operand 47891 states and 72169 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 01:19:45,340 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:19:47,366 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:19:49,390 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:19:51,413 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:19:53,479 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:19:55,500 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:20:03,957 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:20:07,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:20:07,691 INFO L93 Difference]: Finished difference Result 100445 states and 151305 transitions. [2021-11-21 01:20:07,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:20:07,692 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 153 [2021-11-21 01:20:07,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:20:08,208 INFO L225 Difference]: With dead ends: 100445 [2021-11-21 01:20:08,208 INFO L226 Difference]: Without dead ends: 61020 [2021-11-21 01:20:08,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:20:08,769 INFO L933 BasicCegarLoop]: 2645 mSDtfsCounter, 2136 mSDsluCounter, 13619 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 2 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2140 SdHoareTripleChecker+Valid, 15161 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:20:08,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2140 Valid, 15161 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1387 Invalid, 6 Unknown, 0 Unchecked, 22.9s Time] [2021-11-21 01:20:08,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61020 states. [2021-11-21 01:20:11,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61020 to 60813. [2021-11-21 01:20:11,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60813 states, 33579 states have (on average 1.2883349712618006) internal successors, (43261), 35564 states have internal predecessors, (43261), 23864 states have call successors, (23864), 3364 states have call predecessors, (23864), 3369 states have return successors, (24541), 22948 states have call predecessors, (24541), 23863 states have call successors, (24541) [2021-11-21 01:20:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60813 states to 60813 states and 91666 transitions. [2021-11-21 01:20:13,131 INFO L78 Accepts]: Start accepts. Automaton has 60813 states and 91666 transitions. Word has length 153 [2021-11-21 01:20:13,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:20:13,131 INFO L470 AbstractCegarLoop]: Abstraction has 60813 states and 91666 transitions. [2021-11-21 01:20:13,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 01:20:13,132 INFO L276 IsEmpty]: Start isEmpty. Operand 60813 states and 91666 transitions. [2021-11-21 01:20:13,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-21 01:20:13,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:13,181 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 01:20:13,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:20:13,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-21 01:20:13,410 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:13,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:13,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1360309161, now seen corresponding path program 1 times [2021-11-21 01:20:13,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:13,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997479125] [2021-11-21 01:20:13,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:13,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-21 01:20:13,727 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:13,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997479125] [2021-11-21 01:20:13,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997479125] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:20:13,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524548772] [2021-11-21 01:20:13,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:13,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:20:13,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:20:13,729 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:20:13,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:20:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:14,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 2263 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:20:14,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:20:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-21 01:20:15,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:20:15,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524548772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:20:15,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:20:15,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-21 01:20:15,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423516931] [2021-11-21 01:20:15,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:20:15,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:20:15,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:20:15,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:20:15,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:20:15,105 INFO L87 Difference]: Start difference. First operand 60813 states and 91666 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 01:20:18,538 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:20:21,036 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:20:29,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:20:29,557 INFO L93 Difference]: Finished difference Result 126265 states and 190275 transitions. [2021-11-21 01:20:29,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:20:29,558 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 154 [2021-11-21 01:20:29,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:20:30,183 INFO L225 Difference]: With dead ends: 126265 [2021-11-21 01:20:30,183 INFO L226 Difference]: Without dead ends: 73924 [2021-11-21 01:20:30,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:20:30,808 INFO L933 BasicCegarLoop]: 2645 mSDtfsCounter, 2136 mSDsluCounter, 13615 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2140 SdHoareTripleChecker+Valid, 15161 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:20:30,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2140 Valid, 15161 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1388 Invalid, 2 Unknown, 0 Unchecked, 10.6s Time] [2021-11-21 01:20:30,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73924 states. [2021-11-21 01:20:34,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73924 to 60815. [2021-11-21 01:20:34,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60815 states, 33581 states have (on average 1.2883177987552485) internal successors, (43263), 35564 states have internal predecessors, (43263), 23864 states have call successors, (23864), 3364 states have call predecessors, (23864), 3369 states have return successors, (24541), 22950 states have call predecessors, (24541), 23863 states have call successors, (24541) [2021-11-21 01:20:35,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60815 states to 60815 states and 91668 transitions. [2021-11-21 01:20:35,225 INFO L78 Accepts]: Start accepts. Automaton has 60815 states and 91668 transitions. Word has length 154 [2021-11-21 01:20:35,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:20:35,226 INFO L470 AbstractCegarLoop]: Abstraction has 60815 states and 91668 transitions. [2021-11-21 01:20:35,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 01:20:35,226 INFO L276 IsEmpty]: Start isEmpty. Operand 60815 states and 91668 transitions. [2021-11-21 01:20:35,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-21 01:20:35,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:35,312 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 01:20:35,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:20:35,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 01:20:35,530 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:35,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:35,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1487012158, now seen corresponding path program 1 times [2021-11-21 01:20:35,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:35,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217348500] [2021-11-21 01:20:35,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:35,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-21 01:20:36,211 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:36,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217348500] [2021-11-21 01:20:36,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217348500] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:20:36,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409442354] [2021-11-21 01:20:36,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:36,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:20:36,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:20:36,214 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:20:36,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f943a8-25a8-4ed5-88a2-83baa8f52783/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:20:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:37,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 2334 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:20:37,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:20:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-21 01:20:37,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:20:38,419 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-21 01:20:38,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409442354] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:20:38,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1039530895] [2021-11-21 01:20:38,449 INFO L159 IcfgInterpreter]: Started Sifa with 106 locations of interest [2021-11-21 01:20:38,449 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:20:38,455 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:20:38,461 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:20:38,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:20:42,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:42,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:43,114 INFO L244 Elim1Store]: Index analysis took 593 ms [2021-11-21 01:21:19,756 WARN L227 SmtUtils]: Spent 36.55s on a formula simplification. DAG size of input: 1666 DAG size of output: 963 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 01:21:19,762 INFO L354 Elim1Store]: treesize reduction 3209, result has 33.8 percent of original size [2021-11-21 01:21:19,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 139 select indices, 139 select index equivalence classes, 9594 disjoint index pairs (out of 9591 index pairs), introduced 139 new quantified variables, introduced 139 case distinctions, treesize of input 705 treesize of output 2068 [2021-11-21 01:22:01,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-21 01:22:03,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-21 01:22:06,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-21 01:22:10,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-21 01:22:19,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:19,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:19,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:20,236 INFO L244 Elim1Store]: Index analysis took 1770 ms