./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--scsi--megaraid--megaraid_mm.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_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 34ead930b8137fdc7abb50622ed73bdb27f2c7ae71d0ef3b9d44cfc9bee95799 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:35:06,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:35:06,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:35:06,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:35:06,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:35:06,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:35:06,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:35:06,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:35:06,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:35:06,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:35:06,825 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:35:06,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:35:06,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:35:06,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:35:06,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:35:06,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:35:06,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:35:06,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:35:06,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:35:06,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:35:06,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:35:06,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:35:06,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:35:06,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:35:06,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:35:06,861 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:35:06,861 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:35:06,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:35:06,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:35:06,865 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:35:06,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:35:06,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:35:06,868 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:35:06,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:35:06,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:35:06,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:35:06,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:35:06,874 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:35:06,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:35:06,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:35:06,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:35:06,879 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-20 05:35:06,913 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:35:06,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:35:06,914 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:35:06,914 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:35:06,915 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:35:06,915 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:35:06,916 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:35:06,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:35:06,917 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:35:06,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:35:06,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:35:06,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:35:06,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:35:06,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:35:06,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:35:06,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:35:06,919 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:35:06,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:35:06,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:35:06,921 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:35:06,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:35:06,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:35:06,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:35:06,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:35:06,922 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:35:06,922 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:35:06,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:35:06,923 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:35:06,923 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:35:06,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:35:06,924 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:35:06,924 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34ead930b8137fdc7abb50622ed73bdb27f2c7ae71d0ef3b9d44cfc9bee95799 [2021-11-20 05:35:07,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:35:07,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:35:07,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:35:07,256 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:35:07,257 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:35:07,259 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i [2021-11-20 05:35:07,361 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/data/bb4fd72a3/480676ea65644a35b3259113e8745516/FLAG08ac1aa87 [2021-11-20 05:35:08,326 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:35:08,329 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i [2021-11-20 05:35:08,367 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/data/bb4fd72a3/480676ea65644a35b3259113e8745516/FLAG08ac1aa87 [2021-11-20 05:35:08,727 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/data/bb4fd72a3/480676ea65644a35b3259113e8745516 [2021-11-20 05:35:08,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:35:08,732 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:35:08,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:35:08,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:35:08,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:35:08,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:35:08" (1/1) ... [2021-11-20 05:35:08,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37fbfeae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:08, skipping insertion in model container [2021-11-20 05:35:08,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:35:08" (1/1) ... [2021-11-20 05:35:08,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:35:08,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:35:10,180 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_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i[145794,145807] [2021-11-20 05:35:10,274 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:35:10,330 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:35:10,676 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_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i[145794,145807] [2021-11-20 05:35:10,685 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:35:10,738 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:35:10,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:10 WrapperNode [2021-11-20 05:35:10,739 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:35:10,741 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:35:10,741 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:35:10,741 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:35:10,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:10" (1/1) ... [2021-11-20 05:35:10,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:10" (1/1) ... [2021-11-20 05:35:10,941 INFO L137 Inliner]: procedures = 138, calls = 843, calls flagged for inlining = 61, calls inlined = 52, statements flattened = 1733 [2021-11-20 05:35:10,941 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:35:10,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:35:10,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:35:10,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:35:10,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:10" (1/1) ... [2021-11-20 05:35:10,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:10" (1/1) ... [2021-11-20 05:35:10,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:10" (1/1) ... [2021-11-20 05:35:10,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:10" (1/1) ... [2021-11-20 05:35:11,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:10" (1/1) ... [2021-11-20 05:35:11,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:10" (1/1) ... [2021-11-20 05:35:11,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:10" (1/1) ... [2021-11-20 05:35:11,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:35:11,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:35:11,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:35:11,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:35:11,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:10" (1/1) ... [2021-11-20 05:35:11,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:35:11,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:11,235 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:35:11,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:35:11,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 05:35:11,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 05:35:11,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 05:35:11,309 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-20 05:35:11,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-20 05:35:11,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 05:35:11,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-20 05:35:11,310 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-20 05:35:11,310 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-20 05:35:11,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-20 05:35:11,310 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 05:35:11,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 05:35:11,311 INFO L130 BoogieDeclarations]: Found specification of procedure mraid_mm_dealloc_kioc [2021-11-20 05:35:11,311 INFO L138 BoogieDeclarations]: Found implementation of procedure mraid_mm_dealloc_kioc [2021-11-20 05:35:11,311 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-20 05:35:11,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-20 05:35:11,311 INFO L130 BoogieDeclarations]: Found specification of procedure mraid_mm_attach_buf [2021-11-20 05:35:11,312 INFO L138 BoogieDeclarations]: Found implementation of procedure mraid_mm_attach_buf [2021-11-20 05:35:11,313 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-11-20 05:35:11,313 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-11-20 05:35:11,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 05:35:11,313 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-20 05:35:11,314 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-20 05:35:11,314 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-20 05:35:11,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-20 05:35:11,314 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-20 05:35:11,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-20 05:35:11,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 05:35:11,315 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 05:35:11,315 INFO L130 BoogieDeclarations]: Found specification of procedure mraid_mm_ioctl [2021-11-20 05:35:11,315 INFO L138 BoogieDeclarations]: Found implementation of procedure mraid_mm_ioctl [2021-11-20 05:35:11,315 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-20 05:35:11,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-20 05:35:11,316 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 05:35:11,316 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 05:35:11,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 05:35:11,316 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-20 05:35:11,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-20 05:35:11,317 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-20 05:35:11,317 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-20 05:35:11,317 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-11-20 05:35:11,317 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-11-20 05:35:11,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:35:11,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:35:11,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 05:35:11,318 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-20 05:35:11,319 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-20 05:35:11,319 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-20 05:35:11,319 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2021-11-20 05:35:11,319 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2021-11-20 05:35:11,320 INFO L130 BoogieDeclarations]: Found specification of procedure up [2021-11-20 05:35:11,320 INFO L138 BoogieDeclarations]: Found implementation of procedure up [2021-11-20 05:35:11,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 05:35:11,321 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-20 05:35:11,321 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-20 05:35:11,322 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-20 05:35:11,322 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-20 05:35:11,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:35:11,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 05:35:11,325 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2021-11-20 05:35:11,326 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2021-11-20 05:35:11,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:35:11,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-20 05:35:11,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:35:11,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:35:11,328 INFO L130 BoogieDeclarations]: Found specification of procedure dma_pool_free [2021-11-20 05:35:11,328 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_pool_free [2021-11-20 05:35:11,863 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:35:11,866 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:35:12,224 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-20 05:35:14,226 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:35:14,255 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:35:14,255 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 05:35:14,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:35:14 BoogieIcfgContainer [2021-11-20 05:35:14,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:35:14,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:35:14,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:35:14,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:35:14,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:35:08" (1/3) ... [2021-11-20 05:35:14,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c439dcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:35:14, skipping insertion in model container [2021-11-20 05:35:14,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:10" (2/3) ... [2021-11-20 05:35:14,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c439dcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:35:14, skipping insertion in model container [2021-11-20 05:35:14,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:35:14" (3/3) ... [2021-11-20 05:35:14,275 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i [2021-11-20 05:35:14,282 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:35:14,283 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:35:14,368 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:35:14,388 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 05:35:14,388 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:35:14,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 403 states, 310 states have (on average 1.403225806451613) internal successors, (435), 318 states have internal predecessors, (435), 67 states have call successors, (67), 25 states have call predecessors, (67), 24 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2021-11-20 05:35:14,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-20 05:35:14,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:14,475 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 05:35:14,476 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:14,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:14,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1253471979, now seen corresponding path program 1 times [2021-11-20 05:35:14,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:14,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880784966] [2021-11-20 05:35:14,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:14,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:35:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 05:35:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 05:35:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:35:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 05:35:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 05:35:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 05:35:15,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-20 05:35:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-20 05:35:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-11-20 05:35:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-11-20 05:35:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-11-20 05:35:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-20 05:35:15,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:15,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880784966] [2021-11-20 05:35:15,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880784966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:15,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:35:15,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:35:15,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614944149] [2021-11-20 05:35:15,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:15,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:35:15,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:15,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:35:15,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:35:15,772 INFO L87 Difference]: Start difference. First operand has 403 states, 310 states have (on average 1.403225806451613) internal successors, (435), 318 states have internal predecessors, (435), 67 states have call successors, (67), 25 states have call predecessors, (67), 24 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 05:35:17,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:17,507 INFO L93 Difference]: Finished difference Result 815 states and 1172 transitions. [2021-11-20 05:35:17,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:35:17,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 174 [2021-11-20 05:35:17,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:17,530 INFO L225 Difference]: With dead ends: 815 [2021-11-20 05:35:17,530 INFO L226 Difference]: Without dead ends: 416 [2021-11-20 05:35:17,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:35:17,543 INFO L933 BasicCegarLoop]: 535 mSDtfsCounter, 212 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:17,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 1111 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 05:35:17,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-11-20 05:35:17,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 387. [2021-11-20 05:35:17,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 299 states have (on average 1.3846153846153846) internal successors, (414), 302 states have internal predecessors, (414), 64 states have call successors, (64), 24 states have call predecessors, (64), 23 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2021-11-20 05:35:17,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 541 transitions. [2021-11-20 05:35:17,644 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 541 transitions. Word has length 174 [2021-11-20 05:35:17,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:17,645 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 541 transitions. [2021-11-20 05:35:17,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 05:35:17,646 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 541 transitions. [2021-11-20 05:35:17,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-20 05:35:17,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:17,655 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 05:35:17,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:35:17,655 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:17,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:17,656 INFO L85 PathProgramCache]: Analyzing trace with hash -26593390, now seen corresponding path program 1 times [2021-11-20 05:35:17,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:17,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302357679] [2021-11-20 05:35:17,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:17,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:17,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:17,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:35:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:17,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:17,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 05:35:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:17,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:17,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 05:35:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:17,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:17,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:35:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:17,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:17,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 05:35:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:17,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:17,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 05:35:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:17,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:17,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:17,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-20 05:35:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:17,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:17,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:17,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:17,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-20 05:35:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:17,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-20 05:35:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:17,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-20 05:35:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:17,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-11-20 05:35:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:18,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:18,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:18,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-11-20 05:35:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-20 05:35:18,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:18,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302357679] [2021-11-20 05:35:18,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302357679] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:18,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:35:18,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:35:18,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812107064] [2021-11-20 05:35:18,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:18,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:35:18,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:18,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:35:18,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:35:18,058 INFO L87 Difference]: Start difference. First operand 387 states and 541 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 05:35:19,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:19,741 INFO L93 Difference]: Finished difference Result 818 states and 1156 transitions. [2021-11-20 05:35:19,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:35:19,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 175 [2021-11-20 05:35:19,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:19,750 INFO L225 Difference]: With dead ends: 818 [2021-11-20 05:35:19,750 INFO L226 Difference]: Without dead ends: 449 [2021-11-20 05:35:19,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:35:19,754 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 275 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1475 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:19,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 1475 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 05:35:19,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-11-20 05:35:19,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 414. [2021-11-20 05:35:19,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 323 states have (on average 1.3869969040247678) internal successors, (448), 326 states have internal predecessors, (448), 65 states have call successors, (65), 26 states have call predecessors, (65), 25 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2021-11-20 05:35:19,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 577 transitions. [2021-11-20 05:35:19,798 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 577 transitions. Word has length 175 [2021-11-20 05:35:19,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:19,799 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 577 transitions. [2021-11-20 05:35:19,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 05:35:19,800 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 577 transitions. [2021-11-20 05:35:19,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-20 05:35:19,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:19,806 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:19,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:35:19,806 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:19,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:19,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1359871746, now seen corresponding path program 1 times [2021-11-20 05:35:19,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:19,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975709202] [2021-11-20 05:35:19,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:19,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:19,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:35:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:19,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 05:35:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 05:35:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:35:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:20,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 05:35:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 05:35:20,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:35:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 05:35:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:35:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-20 05:35:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-20 05:35:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-11-20 05:35:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-20 05:35:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-11-20 05:35:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-11-20 05:35:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2021-11-20 05:35:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-11-20 05:35:20,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:20,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975709202] [2021-11-20 05:35:20,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975709202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:20,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:35:20,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 05:35:20,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647127892] [2021-11-20 05:35:20,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:20,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:35:20,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:20,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:35:20,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:35:20,272 INFO L87 Difference]: Start difference. First operand 414 states and 577 transitions. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (23), 6 states have call predecessors, (23), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-20 05:35:21,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:21,852 INFO L93 Difference]: Finished difference Result 885 states and 1249 transitions. [2021-11-20 05:35:21,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:35:21,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (23), 6 states have call predecessors, (23), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 225 [2021-11-20 05:35:21,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:21,859 INFO L225 Difference]: With dead ends: 885 [2021-11-20 05:35:21,860 INFO L226 Difference]: Without dead ends: 493 [2021-11-20 05:35:21,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:35:21,864 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 423 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:21,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 1547 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 05:35:21,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-11-20 05:35:21,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 456. [2021-11-20 05:35:21,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 361 states have (on average 1.3850415512465375) internal successors, (500), 364 states have internal predecessors, (500), 66 states have call successors, (66), 29 states have call predecessors, (66), 28 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2021-11-20 05:35:21,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 631 transitions. [2021-11-20 05:35:21,906 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 631 transitions. Word has length 225 [2021-11-20 05:35:21,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:21,907 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 631 transitions. [2021-11-20 05:35:21,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (23), 6 states have call predecessors, (23), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-20 05:35:21,908 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 631 transitions. [2021-11-20 05:35:21,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-20 05:35:21,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:21,915 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:21,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 05:35:21,915 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:21,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:21,916 INFO L85 PathProgramCache]: Analyzing trace with hash -2071282825, now seen corresponding path program 1 times [2021-11-20 05:35:21,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:21,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40763341] [2021-11-20 05:35:21,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:21,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:35:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 05:35:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 05:35:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:35:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:22,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 05:35:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 05:35:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:35:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 05:35:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:35:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-20 05:35:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-20 05:35:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-11-20 05:35:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-11-20 05:35:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-11-20 05:35:22,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2021-11-20 05:35:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2021-11-20 05:35:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-20 05:35:22,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:22,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40763341] [2021-11-20 05:35:22,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40763341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:22,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:35:22,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 05:35:22,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897431826] [2021-11-20 05:35:22,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:22,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:35:22,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:22,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:35:22,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:35:22,431 INFO L87 Difference]: Start difference. First operand 456 states and 631 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (23), 6 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 05:35:26,583 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:35:26,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:26,741 INFO L93 Difference]: Finished difference Result 1039 states and 1467 transitions. [2021-11-20 05:35:26,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:35:26,742 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (23), 6 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 243 [2021-11-20 05:35:26,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:26,749 INFO L225 Difference]: With dead ends: 1039 [2021-11-20 05:35:26,750 INFO L226 Difference]: Without dead ends: 605 [2021-11-20 05:35:26,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:35:26,754 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 357 mSDsluCounter, 1430 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 2021 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:26,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 2021 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-20 05:35:26,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-11-20 05:35:26,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 457. [2021-11-20 05:35:26,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 362 states have (on average 1.3839779005524862) internal successors, (501), 365 states have internal predecessors, (501), 66 states have call successors, (66), 29 states have call predecessors, (66), 28 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2021-11-20 05:35:26,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 632 transitions. [2021-11-20 05:35:26,792 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 632 transitions. Word has length 243 [2021-11-20 05:35:26,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:26,793 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 632 transitions. [2021-11-20 05:35:26,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (23), 6 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 05:35:26,794 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 632 transitions. [2021-11-20 05:35:26,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-20 05:35:26,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:26,800 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:26,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 05:35:26,801 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:26,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:26,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1420447720, now seen corresponding path program 1 times [2021-11-20 05:35:26,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:26,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986855125] [2021-11-20 05:35:26,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:26,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:26,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:35:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 05:35:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 05:35:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:35:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 05:35:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 05:35:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:27,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:35:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 05:35:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:35:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-20 05:35:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:27,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-20 05:35:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-11-20 05:35:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-11-20 05:35:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-11-20 05:35:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2021-11-20 05:35:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2021-11-20 05:35:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-20 05:35:27,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:27,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986855125] [2021-11-20 05:35:27,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986855125] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:27,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:35:27,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 05:35:27,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97818678] [2021-11-20 05:35:27,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:27,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:35:27,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:27,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:35:27,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:35:27,224 INFO L87 Difference]: Start difference. First operand 457 states and 632 transitions. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (23), 6 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 05:35:30,161 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:35:30,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:30,501 INFO L93 Difference]: Finished difference Result 930 states and 1303 transitions. [2021-11-20 05:35:30,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:35:30,502 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (23), 6 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 239 [2021-11-20 05:35:30,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:30,507 INFO L225 Difference]: With dead ends: 930 [2021-11-20 05:35:30,507 INFO L226 Difference]: Without dead ends: 495 [2021-11-20 05:35:30,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:35:30,513 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 279 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 2190 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:30,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 2190 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-20 05:35:30,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-11-20 05:35:30,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 459. [2021-11-20 05:35:30,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 364 states have (on average 1.3818681318681318) internal successors, (503), 367 states have internal predecessors, (503), 66 states have call successors, (66), 29 states have call predecessors, (66), 28 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2021-11-20 05:35:30,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 634 transitions. [2021-11-20 05:35:30,549 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 634 transitions. Word has length 239 [2021-11-20 05:35:30,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:30,550 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 634 transitions. [2021-11-20 05:35:30,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (23), 6 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 05:35:30,550 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 634 transitions. [2021-11-20 05:35:30,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-20 05:35:30,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:30,557 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:30,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 05:35:30,557 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:30,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:30,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1997996134, now seen corresponding path program 1 times [2021-11-20 05:35:30,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:30,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396043176] [2021-11-20 05:35:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:30,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:30,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:35:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 05:35:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 05:35:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:35:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 05:35:30,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 05:35:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:35:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 05:35:30,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:35:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-20 05:35:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-20 05:35:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-11-20 05:35:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:31,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2021-11-20 05:35:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:31,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-11-20 05:35:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:31,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2021-11-20 05:35:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:31,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2021-11-20 05:35:31,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:31,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:31,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:31,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2021-11-20 05:35:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-20 05:35:31,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:31,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396043176] [2021-11-20 05:35:31,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396043176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:31,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:35:31,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 05:35:31,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190199683] [2021-11-20 05:35:31,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:31,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:35:31,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:31,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:35:31,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:35:31,056 INFO L87 Difference]: Start difference. First operand 459 states and 634 transitions. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (24), 6 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-20 05:35:36,366 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:35:36,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:36,532 INFO L93 Difference]: Finished difference Result 934 states and 1307 transitions. [2021-11-20 05:35:36,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:35:36,533 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (24), 6 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 258 [2021-11-20 05:35:36,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:36,539 INFO L225 Difference]: With dead ends: 934 [2021-11-20 05:35:36,539 INFO L226 Difference]: Without dead ends: 497 [2021-11-20 05:35:36,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:35:36,544 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 277 mSDsluCounter, 1948 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 2466 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:36,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 2466 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-11-20 05:35:36,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-11-20 05:35:36,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 459. [2021-11-20 05:35:36,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 364 states have (on average 1.3818681318681318) internal successors, (503), 367 states have internal predecessors, (503), 66 states have call successors, (66), 29 states have call predecessors, (66), 28 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2021-11-20 05:35:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 634 transitions. [2021-11-20 05:35:36,604 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 634 transitions. Word has length 258 [2021-11-20 05:35:36,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:36,605 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 634 transitions. [2021-11-20 05:35:36,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (24), 6 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-20 05:35:36,605 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 634 transitions. [2021-11-20 05:35:36,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-20 05:35:36,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:36,612 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:36,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 05:35:36,612 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:36,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:36,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1119347117, now seen corresponding path program 1 times [2021-11-20 05:35:36,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:36,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672208471] [2021-11-20 05:35:36,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:36,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:35:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 05:35:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:36,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 05:35:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:35:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 05:35:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 05:35:36,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:35:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 05:35:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:36,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:35:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-20 05:35:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-11-20 05:35:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-11-20 05:35:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:36,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:37,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2021-11-20 05:35:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:37,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2021-11-20 05:35:37,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:37,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-11-20 05:35:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:37,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2021-11-20 05:35:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:37,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:37,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:37,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:37,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2021-11-20 05:35:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-11-20 05:35:37,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:37,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672208471] [2021-11-20 05:35:37,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672208471] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:37,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:35:37,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 05:35:37,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010018660] [2021-11-20 05:35:37,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:37,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:35:37,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:37,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:35:37,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:35:37,058 INFO L87 Difference]: Start difference. First operand 459 states and 634 transitions. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (24), 6 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-20 05:35:39,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:39,147 INFO L93 Difference]: Finished difference Result 931 states and 1303 transitions. [2021-11-20 05:35:39,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:35:39,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (24), 6 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 263 [2021-11-20 05:35:39,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:39,154 INFO L225 Difference]: With dead ends: 931 [2021-11-20 05:35:39,154 INFO L226 Difference]: Without dead ends: 494 [2021-11-20 05:35:39,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:35:39,158 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 342 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:39,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 1513 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 05:35:39,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-11-20 05:35:39,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 460. [2021-11-20 05:35:39,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 365 states have (on average 1.3808219178082193) internal successors, (504), 368 states have internal predecessors, (504), 66 states have call successors, (66), 29 states have call predecessors, (66), 28 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2021-11-20 05:35:39,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 635 transitions. [2021-11-20 05:35:39,217 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 635 transitions. Word has length 263 [2021-11-20 05:35:39,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:39,218 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 635 transitions. [2021-11-20 05:35:39,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (24), 6 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-20 05:35:39,219 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 635 transitions. [2021-11-20 05:35:39,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-20 05:35:39,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:39,225 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:39,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 05:35:39,226 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:39,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:39,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1121162451, now seen corresponding path program 1 times [2021-11-20 05:35:39,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:39,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114598579] [2021-11-20 05:35:39,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:39,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:35:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 05:35:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 05:35:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:35:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 05:35:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 05:35:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:35:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 05:35:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:35:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-20 05:35:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-11-20 05:35:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:39,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-11-20 05:35:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2021-11-20 05:35:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2021-11-20 05:35:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-11-20 05:35:39,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2021-11-20 05:35:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2021-11-20 05:35:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-11-20 05:35:39,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:39,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114598579] [2021-11-20 05:35:39,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114598579] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:39,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:35:39,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 05:35:39,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305594352] [2021-11-20 05:35:39,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:39,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:35:39,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:39,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:35:39,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:35:39,627 INFO L87 Difference]: Start difference. First operand 460 states and 635 transitions. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (24), 6 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-20 05:35:43,735 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:35:44,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:44,245 INFO L93 Difference]: Finished difference Result 946 states and 1329 transitions. [2021-11-20 05:35:44,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:35:44,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (24), 6 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 263 [2021-11-20 05:35:44,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:44,261 INFO L225 Difference]: With dead ends: 946 [2021-11-20 05:35:44,262 INFO L226 Difference]: Without dead ends: 508 [2021-11-20 05:35:44,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:35:44,265 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 291 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 2014 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:44,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 2014 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-20 05:35:44,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-20 05:35:44,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 461. [2021-11-20 05:35:44,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 366 states have (on average 1.3797814207650274) internal successors, (505), 369 states have internal predecessors, (505), 66 states have call successors, (66), 29 states have call predecessors, (66), 28 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2021-11-20 05:35:44,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 636 transitions. [2021-11-20 05:35:44,294 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 636 transitions. Word has length 263 [2021-11-20 05:35:44,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:44,295 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 636 transitions. [2021-11-20 05:35:44,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (24), 6 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-20 05:35:44,296 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 636 transitions. [2021-11-20 05:35:44,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-20 05:35:44,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:44,299 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:44,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 05:35:44,300 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:44,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:44,301 INFO L85 PathProgramCache]: Analyzing trace with hash -300906885, now seen corresponding path program 1 times [2021-11-20 05:35:44,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:44,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885832787] [2021-11-20 05:35:44,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:44,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:35:44,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 05:35:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 05:35:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:35:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 05:35:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 05:35:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:35:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 05:35:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:35:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-20 05:35:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-20 05:35:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-11-20 05:35:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-11-20 05:35:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-20 05:35:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2021-11-20 05:35:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2021-11-20 05:35:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2021-11-20 05:35:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,732 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-20 05:35:44,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:44,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885832787] [2021-11-20 05:35:44,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885832787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:35:44,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006271126] [2021-11-20 05:35:44,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:44,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:44,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:44,736 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:35:44,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:35:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:45,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 2191 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 05:35:45,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-20 05:35:46,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:35:46,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006271126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:46,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:35:46,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-11-20 05:35:46,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161833184] [2021-11-20 05:35:46,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:46,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:35:46,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:46,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:35:46,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:35:46,087 INFO L87 Difference]: Start difference. First operand 461 states and 636 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-20 05:35:46,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:46,124 INFO L93 Difference]: Finished difference Result 908 states and 1264 transitions. [2021-11-20 05:35:46,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:35:46,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 263 [2021-11-20 05:35:46,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:46,130 INFO L225 Difference]: With dead ends: 908 [2021-11-20 05:35:46,130 INFO L226 Difference]: Without dead ends: 469 [2021-11-20 05:35:46,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:35:46,136 INFO L933 BasicCegarLoop]: 539 mSDtfsCounter, 3 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:46,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1074 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:35:46,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-11-20 05:35:46,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 467. [2021-11-20 05:35:46,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 372 states have (on average 1.3790322580645162) internal successors, (513), 375 states have internal predecessors, (513), 66 states have call successors, (66), 29 states have call predecessors, (66), 28 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2021-11-20 05:35:46,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 644 transitions. [2021-11-20 05:35:46,164 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 644 transitions. Word has length 263 [2021-11-20 05:35:46,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:46,165 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 644 transitions. [2021-11-20 05:35:46,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-20 05:35:46,165 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 644 transitions. [2021-11-20 05:35:46,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-20 05:35:46,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:46,170 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:46,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:46,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:46,385 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:46,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:46,385 INFO L85 PathProgramCache]: Analyzing trace with hash 136138233, now seen corresponding path program 1 times [2021-11-20 05:35:46,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:46,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297862447] [2021-11-20 05:35:46,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:46,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:35:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 05:35:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 05:35:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:35:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 05:35:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 05:35:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:46,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:35:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 05:35:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:35:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-20 05:35:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-11-20 05:35:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-11-20 05:35:46,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2021-11-20 05:35:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2021-11-20 05:35:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-11-20 05:35:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2021-11-20 05:35:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2021-11-20 05:35:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 261 [2021-11-20 05:35:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2021-11-20 05:35:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-20 05:35:46,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:46,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297862447] [2021-11-20 05:35:46,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297862447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:35:46,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062466775] [2021-11-20 05:35:46,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:46,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:46,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:46,868 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:35:46,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:35:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:47,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 2274 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:35:47,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-11-20 05:35:48,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:35:48,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062466775] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:48,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:35:48,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-11-20 05:35:48,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690247354] [2021-11-20 05:35:48,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:48,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:35:48,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:48,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:35:48,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:35:48,241 INFO L87 Difference]: Start difference. First operand 467 states and 644 transitions. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-20 05:35:48,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:48,333 INFO L93 Difference]: Finished difference Result 915 states and 1265 transitions. [2021-11-20 05:35:48,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:35:48,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 281 [2021-11-20 05:35:48,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:48,339 INFO L225 Difference]: With dead ends: 915 [2021-11-20 05:35:48,339 INFO L226 Difference]: Without dead ends: 465 [2021-11-20 05:35:48,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:35:48,343 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 7 mSDsluCounter, 1606 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 2144 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:48,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 2144 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:35:48,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-11-20 05:35:48,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 465. [2021-11-20 05:35:48,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 370 states have (on average 1.3756756756756756) internal successors, (509), 373 states have internal predecessors, (509), 66 states have call successors, (66), 29 states have call predecessors, (66), 28 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2021-11-20 05:35:48,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 640 transitions. [2021-11-20 05:35:48,371 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 640 transitions. Word has length 281 [2021-11-20 05:35:48,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:48,371 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 640 transitions. [2021-11-20 05:35:48,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-20 05:35:48,372 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 640 transitions. [2021-11-20 05:35:48,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-11-20 05:35:48,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:48,377 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:48,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:48,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 05:35:48,592 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:48,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:48,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1511044386, now seen corresponding path program 1 times [2021-11-20 05:35:48,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:48,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175512224] [2021-11-20 05:35:48,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:48,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:48,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:35:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:48,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:48,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 05:35:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:48,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:48,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 05:35:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:48,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:48,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:35:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:48,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:48,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:48,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 05:35:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:48,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:48,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 05:35:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:48,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:48,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:35:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:48,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 05:35:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:48,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:48,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:35:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:48,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-20 05:35:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:48,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-20 05:35:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:48,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:48,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:48,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-11-20 05:35:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:49,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:49,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:49,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-11-20 05:35:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:49,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:49,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:49,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2021-11-20 05:35:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:49,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-11-20 05:35:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:49,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-11-20 05:35:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:49,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2021-11-20 05:35:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:49,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:49,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:49,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-20 05:35:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:49,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2021-11-20 05:35:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:49,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 275 [2021-11-20 05:35:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-20 05:35:49,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:49,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175512224] [2021-11-20 05:35:49,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175512224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:35:49,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088226551] [2021-11-20 05:35:49,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:49,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:49,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:49,096 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:35:49,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:35:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:49,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 2320 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 05:35:49,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:50,439 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-20 05:35:50,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:35:51,228 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-20 05:35:51,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088226551] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:35:51,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:35:51,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 11 [2021-11-20 05:35:51,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156497646] [2021-11-20 05:35:51,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:35:51,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:35:51,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:51,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:35:51,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:35:51,233 INFO L87 Difference]: Start difference. First operand 465 states and 640 transitions. Second operand has 11 states, 11 states have (on average 14.181818181818182) internal successors, (156), 7 states have internal predecessors, (156), 5 states have call successors, (45), 6 states have call predecessors, (45), 2 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) [2021-11-20 05:35:54,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:54,054 INFO L93 Difference]: Finished difference Result 990 states and 1394 transitions. [2021-11-20 05:35:54,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 05:35:54,055 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.181818181818182) internal successors, (156), 7 states have internal predecessors, (156), 5 states have call successors, (45), 6 states have call predecessors, (45), 2 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) Word has length 285 [2021-11-20 05:35:54,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:54,060 INFO L225 Difference]: With dead ends: 990 [2021-11-20 05:35:54,061 INFO L226 Difference]: Without dead ends: 547 [2021-11-20 05:35:54,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 636 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:35:54,065 INFO L933 BasicCegarLoop]: 539 mSDtfsCounter, 359 mSDsluCounter, 1327 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1866 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:54,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 1866 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 05:35:54,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-11-20 05:35:54,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 504. [2021-11-20 05:35:54,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 403 states have (on average 1.369727047146402) internal successors, (552), 408 states have internal predecessors, (552), 72 states have call successors, (72), 29 states have call predecessors, (72), 28 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2021-11-20 05:35:54,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 695 transitions. [2021-11-20 05:35:54,098 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 695 transitions. Word has length 285 [2021-11-20 05:35:54,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:54,099 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 695 transitions. [2021-11-20 05:35:54,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.181818181818182) internal successors, (156), 7 states have internal predecessors, (156), 5 states have call successors, (45), 6 states have call predecessors, (45), 2 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) [2021-11-20 05:35:54,100 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 695 transitions. [2021-11-20 05:35:54,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-11-20 05:35:54,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:54,105 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:54,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:54,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 05:35:54,328 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:54,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:54,329 INFO L85 PathProgramCache]: Analyzing trace with hash -819478165, now seen corresponding path program 1 times [2021-11-20 05:35:54,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:54,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754944716] [2021-11-20 05:35:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:54,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:35:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 05:35:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 05:35:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:35:54,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 05:35:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 05:35:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:35:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 05:35:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:35:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-20 05:35:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-20 05:35:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-11-20 05:35:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:54,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-11-20 05:35:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2021-11-20 05:35:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-11-20 05:35:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-11-20 05:35:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2021-11-20 05:35:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:35:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2021-11-20 05:35:54,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2021-11-20 05:35:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 287 [2021-11-20 05:35:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-20 05:35:54,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:54,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754944716] [2021-11-20 05:35:54,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754944716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:35:54,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944077909] [2021-11-20 05:35:54,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:54,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:54,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:54,896 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:35:54,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:35:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:55,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 2348 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:35:55,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-20 05:35:56,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:35:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-20 05:35:57,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944077909] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:35:57,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:35:57,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 12 [2021-11-20 05:35:57,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775479779] [2021-11-20 05:35:57,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:35:57,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 05:35:57,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:57,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 05:35:57,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:35:57,072 INFO L87 Difference]: Start difference. First operand 504 states and 695 transitions. Second operand has 12 states, 12 states have (on average 13.0) internal successors, (156), 8 states have internal predecessors, (156), 3 states have call successors, (43), 6 states have call predecessors, (43), 2 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-20 05:36:00,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:36:00,810 INFO L93 Difference]: Finished difference Result 1048 states and 1474 transitions. [2021-11-20 05:36:00,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 05:36:00,812 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 13.0) internal successors, (156), 8 states have internal predecessors, (156), 3 states have call successors, (43), 6 states have call predecessors, (43), 2 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 297 [2021-11-20 05:36:00,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:36:00,818 INFO L225 Difference]: With dead ends: 1048 [2021-11-20 05:36:00,818 INFO L226 Difference]: Without dead ends: 566 [2021-11-20 05:36:00,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 662 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:36:00,823 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 368 mSDsluCounter, 2411 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 2944 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:36:00,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 2944 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1065 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-20 05:36:00,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-20 05:36:00,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 518. [2021-11-20 05:36:00,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 415 states have (on average 1.3686746987951808) internal successors, (568), 421 states have internal predecessors, (568), 74 states have call successors, (74), 29 states have call predecessors, (74), 28 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2021-11-20 05:36:00,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 715 transitions. [2021-11-20 05:36:00,856 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 715 transitions. Word has length 297 [2021-11-20 05:36:00,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:36:00,857 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 715 transitions. [2021-11-20 05:36:00,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.0) internal successors, (156), 8 states have internal predecessors, (156), 3 states have call successors, (43), 6 states have call predecessors, (43), 2 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-20 05:36:00,858 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 715 transitions. [2021-11-20 05:36:00,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-11-20 05:36:00,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:36:00,864 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:36:00,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:36:01,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:36:01,080 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:36:01,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:36:01,081 INFO L85 PathProgramCache]: Analyzing trace with hash 84366775, now seen corresponding path program 1 times [2021-11-20 05:36:01,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:36:01,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284579180] [2021-11-20 05:36:01,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:36:01,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:36:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:36:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 05:36:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:01,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 05:36:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:36:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 05:36:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 05:36:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:36:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 05:36:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:36:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-20 05:36:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-20 05:36:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:36:01,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-11-20 05:36:01,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:36:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-11-20 05:36:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:01,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:36:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2021-11-20 05:36:01,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2021-11-20 05:36:01,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-11-20 05:36:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2021-11-20 05:36:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:36:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2021-11-20 05:36:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2021-11-20 05:36:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 287 [2021-11-20 05:36:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-11-20 05:36:01,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:36:01,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284579180] [2021-11-20 05:36:01,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284579180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:36:01,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:36:01,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 05:36:01,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418100779] [2021-11-20 05:36:01,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:36:01,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:36:01,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:36:01,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:36:01,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:36:01,733 INFO L87 Difference]: Start difference. First operand 518 states and 715 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (27), 6 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-20 05:36:03,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:36:03,237 INFO L93 Difference]: Finished difference Result 1046 states and 1460 transitions. [2021-11-20 05:36:03,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:36:03,237 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (27), 6 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 297 [2021-11-20 05:36:03,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:36:03,242 INFO L225 Difference]: With dead ends: 1046 [2021-11-20 05:36:03,242 INFO L226 Difference]: Without dead ends: 550 [2021-11-20 05:36:03,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:36:03,246 INFO L933 BasicCegarLoop]: 511 mSDtfsCounter, 341 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 1505 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:36:03,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 1505 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 05:36:03,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-20 05:36:03,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 520. [2021-11-20 05:36:03,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 417 states have (on average 1.3669064748201438) internal successors, (570), 423 states have internal predecessors, (570), 74 states have call successors, (74), 29 states have call predecessors, (74), 28 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2021-11-20 05:36:03,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 717 transitions. [2021-11-20 05:36:03,271 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 717 transitions. Word has length 297 [2021-11-20 05:36:03,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:36:03,272 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 717 transitions. [2021-11-20 05:36:03,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (27), 6 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-20 05:36:03,272 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 717 transitions. [2021-11-20 05:36:03,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-11-20 05:36:03,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:36:03,276 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:36:03,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 05:36:03,277 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:36:03,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:36:03,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1867758490, now seen corresponding path program 1 times [2021-11-20 05:36:03,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:36:03,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659261867] [2021-11-20 05:36:03,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:36:03,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:36:03,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:36:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 05:36:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 05:36:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:36:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 05:36:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 05:36:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:36:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 05:36:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:36:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-20 05:36:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-20 05:36:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:36:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-20 05:36:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:36:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-11-20 05:36:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:36:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-11-20 05:36:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2021-11-20 05:36:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2021-11-20 05:36:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2021-11-20 05:36:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:36:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 273 [2021-11-20 05:36:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2021-11-20 05:36:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 289 [2021-11-20 05:36:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-11-20 05:36:03,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:36:03,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659261867] [2021-11-20 05:36:03,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659261867] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:36:03,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733732261] [2021-11-20 05:36:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:36:03,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:36:03,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:36:03,822 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:36:03,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:36:04,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:04,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 2346 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:36:04,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:36:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-20 05:36:05,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:36:05,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733732261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:36:05,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:36:05,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-11-20 05:36:05,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473637545] [2021-11-20 05:36:05,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:36:05,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:36:05,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:36:05,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:36:05,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:36:05,235 INFO L87 Difference]: Start difference. First operand 520 states and 717 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-20 05:36:05,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:36:05,326 INFO L93 Difference]: Finished difference Result 1022 states and 1415 transitions. [2021-11-20 05:36:05,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:36:05,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 299 [2021-11-20 05:36:05,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:36:05,333 INFO L225 Difference]: With dead ends: 1022 [2021-11-20 05:36:05,333 INFO L226 Difference]: Without dead ends: 524 [2021-11-20 05:36:05,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:36:05,337 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 5 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:36:05,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 1603 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:36:05,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-11-20 05:36:05,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 522. [2021-11-20 05:36:05,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 419 states have (on average 1.3651551312649164) internal successors, (572), 425 states have internal predecessors, (572), 74 states have call successors, (74), 29 states have call predecessors, (74), 28 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2021-11-20 05:36:05,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 719 transitions. [2021-11-20 05:36:05,366 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 719 transitions. Word has length 299 [2021-11-20 05:36:05,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:36:05,367 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 719 transitions. [2021-11-20 05:36:05,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-20 05:36:05,368 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 719 transitions. [2021-11-20 05:36:05,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-11-20 05:36:05,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:36:05,373 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:36:05,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:36:05,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 05:36:05,588 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:36:05,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:36:05,589 INFO L85 PathProgramCache]: Analyzing trace with hash -316021051, now seen corresponding path program 1 times [2021-11-20 05:36:05,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:36:05,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634094517] [2021-11-20 05:36:05,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:36:05,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:36:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:05,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:36:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:05,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:05,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 05:36:05,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:05,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:05,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 05:36:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:05,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:05,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:36:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 05:36:06,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:06,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 05:36:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:36:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 05:36:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:06,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:36:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-20 05:36:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-20 05:36:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:36:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-20 05:36:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:36:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-11-20 05:36:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:36:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-11-20 05:36:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2021-11-20 05:36:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2021-11-20 05:36:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2021-11-20 05:36:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:36:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2021-11-20 05:36:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 285 [2021-11-20 05:36:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 295 [2021-11-20 05:36:06,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:06,209 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-11-20 05:36:06,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:36:06,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634094517] [2021-11-20 05:36:06,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634094517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:36:06,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013130768] [2021-11-20 05:36:06,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:36:06,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:36:06,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:36:06,212 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:36:06,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:36:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:07,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 2372 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 05:36:07,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:36:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-11-20 05:36:07,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:36:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-11-20 05:36:08,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013130768] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:36:08,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:36:08,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 11 [2021-11-20 05:36:08,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270008486] [2021-11-20 05:36:08,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:36:08,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:36:08,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:36:08,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:36:08,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:36:08,540 INFO L87 Difference]: Start difference. First operand 522 states and 719 transitions. Second operand has 11 states, 11 states have (on average 15.545454545454545) internal successors, (171), 7 states have internal predecessors, (171), 2 states have call successors, (54), 6 states have call predecessors, (54), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-20 05:36:10,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:36:10,626 INFO L93 Difference]: Finished difference Result 1058 states and 1474 transitions. [2021-11-20 05:36:10,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:36:10,627 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.545454545454545) internal successors, (171), 7 states have internal predecessors, (171), 2 states have call successors, (54), 6 states have call predecessors, (54), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 305 [2021-11-20 05:36:10,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:36:10,632 INFO L225 Difference]: With dead ends: 1058 [2021-11-20 05:36:10,632 INFO L226 Difference]: Without dead ends: 558 [2021-11-20 05:36:10,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 676 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:36:10,639 INFO L933 BasicCegarLoop]: 511 mSDtfsCounter, 344 mSDsluCounter, 1881 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 2392 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:36:10,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 2392 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 05:36:10,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-20 05:36:10,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 528. [2021-11-20 05:36:10,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 425 states have (on average 1.36) internal successors, (578), 431 states have internal predecessors, (578), 74 states have call successors, (74), 29 states have call predecessors, (74), 28 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2021-11-20 05:36:10,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 725 transitions. [2021-11-20 05:36:10,672 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 725 transitions. Word has length 305 [2021-11-20 05:36:10,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:36:10,673 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 725 transitions. [2021-11-20 05:36:10,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.545454545454545) internal successors, (171), 7 states have internal predecessors, (171), 2 states have call successors, (54), 6 states have call predecessors, (54), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-20 05:36:10,674 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 725 transitions. [2021-11-20 05:36:10,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-11-20 05:36:10,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:36:10,679 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:36:10,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:36:10,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:36:10,892 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:36:10,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:36:10,893 INFO L85 PathProgramCache]: Analyzing trace with hash 433160894, now seen corresponding path program 1 times [2021-11-20 05:36:10,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:36:10,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226059811] [2021-11-20 05:36:10,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:36:10,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:36:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:36:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 05:36:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 05:36:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:36:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 05:36:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:11,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 05:36:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:36:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 05:36:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:36:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-20 05:36:11,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-20 05:36:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:36:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-11-20 05:36:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:36:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-11-20 05:36:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:36:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-11-20 05:36:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2021-11-20 05:36:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2021-11-20 05:36:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2021-11-20 05:36:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:36:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:36:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2021-11-20 05:36:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2021-11-20 05:36:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2021-11-20 05:36:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:11,443 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-11-20 05:36:11,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:36:11,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226059811] [2021-11-20 05:36:11,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226059811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:36:11,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816382596] [2021-11-20 05:36:11,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:36:11,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:36:11,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:36:11,448 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:36:11,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:36:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:12,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 2379 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-20 05:36:12,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:36:12,728 INFO L354 Elim1Store]: treesize reduction 324, result has 11.5 percent of original size [2021-11-20 05:36:12,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 19 case distinctions, treesize of input 68 treesize of output 86 [2021-11-20 05:36:23,776 INFO L354 Elim1Store]: treesize reduction 170, result has 21.3 percent of original size [2021-11-20 05:36:23,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 77 treesize of output 109 [2021-11-20 05:36:24,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2021-11-20 05:36:25,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2021-11-20 05:36:25,431 INFO L354 Elim1Store]: treesize reduction 220, result has 20.0 percent of original size [2021-11-20 05:36:25,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 26 case distinctions, treesize of input 101 treesize of output 140 [2021-11-20 05:36:26,306 INFO L354 Elim1Store]: treesize reduction 168, result has 0.6 percent of original size [2021-11-20 05:36:26,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 123 treesize of output 109 [2021-11-20 05:36:26,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 05:36:26,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 05:36:26,971 INFO L354 Elim1Store]: treesize reduction 286, result has 18.3 percent of original size [2021-11-20 05:36:26,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 34 case distinctions, treesize of input 130 treesize of output 176 [2021-11-20 05:36:39,073 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-20 05:36:39,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-11-20 05:36:39,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:36:39,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-20 05:36:54,317 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-20 05:36:54,319 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-20 05:36:54,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:36:54,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-20 05:36:54,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098763874] [2021-11-20 05:36:54,319 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 05:36:54,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:36:54,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:36:54,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:36:54,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=508, Unknown=3, NotChecked=0, Total=600 [2021-11-20 05:36:54,321 INFO L87 Difference]: Start difference. First operand 528 states and 725 transitions. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 7 states have internal predecessors, (140), 2 states have call successors, (27), 6 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-20 05:36:54,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:36:54,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=89, Invalid=508, Unknown=3, NotChecked=0, Total=600 [2021-11-20 05:36:54,323 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:36:54,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:36:54,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-20 05:36:54,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:36:54,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 05:36:54,525 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@52806e50 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-20 05:36:54,530 INFO L158 Benchmark]: Toolchain (without parser) took 105797.90ms. Allocated memory was 86.0MB in the beginning and 522.2MB in the end (delta: 436.2MB). Free memory was 59.6MB in the beginning and 316.5MB in the end (delta: -257.0MB). Peak memory consumption was 180.0MB. Max. memory is 16.1GB. [2021-11-20 05:36:54,530 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 86.0MB. Free memory was 65.8MB in the beginning and 65.7MB in the end (delta: 70.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:36:54,531 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2005.75ms. Allocated memory was 86.0MB in the beginning and 107.0MB in the end (delta: 21.0MB). Free memory was 59.6MB in the beginning and 58.0MB in the end (delta: 1.6MB). Peak memory consumption was 48.2MB. Max. memory is 16.1GB. [2021-11-20 05:36:54,533 INFO L158 Benchmark]: Boogie Procedure Inliner took 200.93ms. Allocated memory is still 107.0MB. Free memory was 58.0MB in the beginning and 47.3MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 05:36:54,534 INFO L158 Benchmark]: Boogie Preprocessor took 241.55ms. Allocated memory is still 107.0MB. Free memory was 47.3MB in the beginning and 57.3MB in the end (delta: -10.0MB). Peak memory consumption was 18.2MB. Max. memory is 16.1GB. [2021-11-20 05:36:54,536 INFO L158 Benchmark]: RCFGBuilder took 3074.62ms. Allocated memory was 107.0MB in the beginning and 151.0MB in the end (delta: 44.0MB). Free memory was 57.3MB in the beginning and 87.7MB in the end (delta: -30.5MB). Peak memory consumption was 46.3MB. Max. memory is 16.1GB. [2021-11-20 05:36:54,537 INFO L158 Benchmark]: TraceAbstraction took 100268.03ms. Allocated memory was 151.0MB in the beginning and 522.2MB in the end (delta: 371.2MB). Free memory was 87.7MB in the beginning and 316.5MB in the end (delta: -228.8MB). Peak memory consumption was 141.8MB. Max. memory is 16.1GB. [2021-11-20 05:36:54,539 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 86.0MB. Free memory was 65.8MB in the beginning and 65.7MB in the end (delta: 70.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2005.75ms. Allocated memory was 86.0MB in the beginning and 107.0MB in the end (delta: 21.0MB). Free memory was 59.6MB in the beginning and 58.0MB in the end (delta: 1.6MB). Peak memory consumption was 48.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 200.93ms. Allocated memory is still 107.0MB. Free memory was 58.0MB in the beginning and 47.3MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 241.55ms. Allocated memory is still 107.0MB. Free memory was 47.3MB in the beginning and 57.3MB in the end (delta: -10.0MB). Peak memory consumption was 18.2MB. Max. memory is 16.1GB. * RCFGBuilder took 3074.62ms. Allocated memory was 107.0MB in the beginning and 151.0MB in the end (delta: 44.0MB). Free memory was 57.3MB in the beginning and 87.7MB in the end (delta: -30.5MB). Peak memory consumption was 46.3MB. Max. memory is 16.1GB. * TraceAbstraction took 100268.03ms. Allocated memory was 151.0MB in the beginning and 522.2MB in the end (delta: 371.2MB). Free memory was 87.7MB in the beginning and 316.5MB in the end (delta: -228.8MB). Peak memory consumption was 141.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@52806e50 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@52806e50: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 34ead930b8137fdc7abb50622ed73bdb27f2c7ae71d0ef3b9d44cfc9bee95799 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:36:57,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:36:57,199 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:36:57,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:36:57,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:36:57,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:36:57,269 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:36:57,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:36:57,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:36:57,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:36:57,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:36:57,295 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:36:57,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:36:57,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:36:57,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:36:57,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:36:57,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:36:57,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:36:57,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:36:57,314 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:36:57,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:36:57,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:36:57,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:36:57,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:36:57,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:36:57,327 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:36:57,328 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:36:57,329 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:36:57,330 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:36:57,331 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:36:57,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:36:57,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:36:57,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:36:57,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:36:57,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:36:57,338 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:36:57,339 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:36:57,339 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:36:57,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:36:57,341 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:36:57,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:36:57,344 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-11-20 05:36:57,392 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:36:57,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:36:57,393 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:36:57,393 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:36:57,394 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:36:57,395 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:36:57,395 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:36:57,396 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:36:57,398 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:36:57,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:36:57,400 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:36:57,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:36:57,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:36:57,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:36:57,401 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 05:36:57,402 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 05:36:57,402 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 05:36:57,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:36:57,403 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:36:57,403 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:36:57,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:36:57,404 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:36:57,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:36:57,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:36:57,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:36:57,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:36:57,406 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:36:57,406 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 05:36:57,407 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 05:36:57,407 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:36:57,407 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:36:57,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:36:57,408 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:36:57,408 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 05:36:57,409 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34ead930b8137fdc7abb50622ed73bdb27f2c7ae71d0ef3b9d44cfc9bee95799 [2021-11-20 05:36:57,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:36:57,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:36:57,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:36:57,915 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:36:57,916 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:36:57,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i [2021-11-20 05:36:58,003 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/data/09c1e49be/5367791e274e4de4b4e95c67c4f8c84c/FLAG697c75580 [2021-11-20 05:36:59,132 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:36:59,134 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i [2021-11-20 05:36:59,188 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/data/09c1e49be/5367791e274e4de4b4e95c67c4f8c84c/FLAG697c75580 [2021-11-20 05:36:59,518 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/data/09c1e49be/5367791e274e4de4b4e95c67c4f8c84c [2021-11-20 05:36:59,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:36:59,522 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:36:59,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:36:59,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:36:59,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:36:59,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:36:59" (1/1) ... [2021-11-20 05:36:59,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e39ebd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:36:59, skipping insertion in model container [2021-11-20 05:36:59,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:36:59" (1/1) ... [2021-11-20 05:36:59,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:36:59,708 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:37:01,274 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_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i[145794,145807] [2021-11-20 05:37:01,347 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:37:01,422 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-20 05:37:01,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:37:01,819 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_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i[145794,145807] [2021-11-20 05:37:01,835 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:37:01,875 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:37:02,170 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_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i[145794,145807] [2021-11-20 05:37:02,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:37:02,309 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:37:02,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:02 WrapperNode [2021-11-20 05:37:02,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:37:02,311 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:37:02,312 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:37:02,312 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:37:02,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:02" (1/1) ... [2021-11-20 05:37:02,431 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:02" (1/1) ... [2021-11-20 05:37:02,543 INFO L137 Inliner]: procedures = 153, calls = 843, calls flagged for inlining = 61, calls inlined = 52, statements flattened = 1694 [2021-11-20 05:37:02,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:37:02,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:37:02,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:37:02,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:37:02,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:02" (1/1) ... [2021-11-20 05:37:02,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:02" (1/1) ... [2021-11-20 05:37:02,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:02" (1/1) ... [2021-11-20 05:37:02,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:02" (1/1) ... [2021-11-20 05:37:02,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:02" (1/1) ... [2021-11-20 05:37:02,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:02" (1/1) ... [2021-11-20 05:37:02,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:02" (1/1) ... [2021-11-20 05:37:02,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:37:02,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:37:02,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:37:02,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:37:02,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:02" (1/1) ... [2021-11-20 05:37:02,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:37:02,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:02,820 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:37:02,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:37:02,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-20 05:37:02,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-20 05:37:02,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 05:37:02,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 05:37:02,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-20 05:37:02,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 05:37:02,881 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-20 05:37:02,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-20 05:37:02,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-20 05:37:02,885 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-20 05:37:02,886 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-20 05:37:02,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-20 05:37:02,886 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 05:37:02,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 05:37:02,887 INFO L130 BoogieDeclarations]: Found specification of procedure mraid_mm_dealloc_kioc [2021-11-20 05:37:02,888 INFO L138 BoogieDeclarations]: Found implementation of procedure mraid_mm_dealloc_kioc [2021-11-20 05:37:02,888 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-20 05:37:02,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-20 05:37:02,888 INFO L130 BoogieDeclarations]: Found specification of procedure mraid_mm_attach_buf [2021-11-20 05:37:02,889 INFO L138 BoogieDeclarations]: Found implementation of procedure mraid_mm_attach_buf [2021-11-20 05:37:02,889 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-11-20 05:37:02,889 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-11-20 05:37:02,889 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-20 05:37:02,889 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-20 05:37:02,890 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-20 05:37:02,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-20 05:37:02,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-20 05:37:02,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-20 05:37:02,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-20 05:37:02,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-20 05:37:02,891 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-20 05:37:02,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-20 05:37:02,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 05:37:02,892 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 05:37:02,892 INFO L130 BoogieDeclarations]: Found specification of procedure mraid_mm_ioctl [2021-11-20 05:37:02,892 INFO L138 BoogieDeclarations]: Found implementation of procedure mraid_mm_ioctl [2021-11-20 05:37:02,893 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-20 05:37:02,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-20 05:37:02,893 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 05:37:02,894 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 05:37:02,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 05:37:02,894 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-20 05:37:02,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-20 05:37:02,894 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-20 05:37:02,895 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-20 05:37:02,895 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-11-20 05:37:02,895 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-11-20 05:37:02,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:37:02,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:37:02,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 05:37:02,898 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-20 05:37:02,899 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-20 05:37:02,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-20 05:37:02,900 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-20 05:37:02,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-20 05:37:02,900 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2021-11-20 05:37:02,901 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2021-11-20 05:37:02,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-20 05:37:02,902 INFO L130 BoogieDeclarations]: Found specification of procedure up [2021-11-20 05:37:02,902 INFO L138 BoogieDeclarations]: Found implementation of procedure up [2021-11-20 05:37:02,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 05:37:02,903 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-20 05:37:02,904 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-20 05:37:02,904 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-20 05:37:02,904 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-20 05:37:02,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-20 05:37:02,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-20 05:37:02,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-20 05:37:02,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:37:02,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 05:37:02,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 05:37:02,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-20 05:37:02,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 05:37:02,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-20 05:37:02,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-20 05:37:02,908 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2021-11-20 05:37:02,908 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2021-11-20 05:37:02,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-20 05:37:02,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:37:02,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:37:02,909 INFO L130 BoogieDeclarations]: Found specification of procedure dma_pool_free [2021-11-20 05:37:02,909 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_pool_free [2021-11-20 05:37:03,562 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:37:03,568 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:37:03,733 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-20 05:37:24,462 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:37:24,480 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:37:24,480 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 05:37:24,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:37:24 BoogieIcfgContainer [2021-11-20 05:37:24,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:37:24,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:37:24,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:37:24,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:37:24,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:36:59" (1/3) ... [2021-11-20 05:37:24,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d0bdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:37:24, skipping insertion in model container [2021-11-20 05:37:24,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:02" (2/3) ... [2021-11-20 05:37:24,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d0bdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:37:24, skipping insertion in model container [2021-11-20 05:37:24,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:37:24" (3/3) ... [2021-11-20 05:37:24,495 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i [2021-11-20 05:37:24,501 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:37:24,502 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:37:24,567 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:37:24,575 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 05:37:24,575 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:37:24,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 403 states, 310 states have (on average 1.403225806451613) internal successors, (435), 318 states have internal predecessors, (435), 67 states have call successors, (67), 25 states have call predecessors, (67), 24 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2021-11-20 05:37:24,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-20 05:37:24,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:24,645 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 05:37:24,646 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:37:24,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:24,653 INFO L85 PathProgramCache]: Analyzing trace with hash 698284012, now seen corresponding path program 1 times [2021-11-20 05:37:24,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:37:24,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70627245] [2021-11-20 05:37:24,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:24,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:37:24,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:37:24,679 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:37:24,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 05:37:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:26,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 05:37:26,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-20 05:37:27,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-20 05:37:27,758 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:37:27,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70627245] [2021-11-20 05:37:27,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [70627245] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:37:27,760 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:37:27,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 05:37:27,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787418311] [2021-11-20 05:37:27,764 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:37:27,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 05:37:27,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:37:27,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 05:37:27,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:37:27,828 INFO L87 Difference]: Start difference. First operand has 403 states, 310 states have (on average 1.403225806451613) internal successors, (435), 318 states have internal predecessors, (435), 67 states have call successors, (67), 25 states have call predecessors, (67), 24 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) Second operand has 2 states, 2 states have (on average 48.5) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-20 05:37:27,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:27,967 INFO L93 Difference]: Finished difference Result 786 states and 1119 transitions. [2021-11-20 05:37:27,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:37:27,972 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 48.5) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 174 [2021-11-20 05:37:27,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:28,000 INFO L225 Difference]: With dead ends: 786 [2021-11-20 05:37:28,008 INFO L226 Difference]: Without dead ends: 387 [2021-11-20 05:37:28,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:37:28,027 INFO L933 BasicCegarLoop]: 560 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:28,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:37:28,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-20 05:37:28,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2021-11-20 05:37:28,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 299 states have (on average 1.3846153846153846) internal successors, (414), 302 states have internal predecessors, (414), 64 states have call successors, (64), 24 states have call predecessors, (64), 23 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2021-11-20 05:37:28,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 541 transitions. [2021-11-20 05:37:28,195 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 541 transitions. Word has length 174 [2021-11-20 05:37:28,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:28,197 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 541 transitions. [2021-11-20 05:37:28,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 48.5) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-20 05:37:28,198 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 541 transitions. [2021-11-20 05:37:28,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-20 05:37:28,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:28,206 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 05:37:28,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:28,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:37:28,433 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:37:28,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:28,434 INFO L85 PathProgramCache]: Analyzing trace with hash 944989674, now seen corresponding path program 1 times [2021-11-20 05:37:28,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:37:28,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138880524] [2021-11-20 05:37:28,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:28,437 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:37:28,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:37:28,439 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:37:28,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 05:37:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:29,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 05:37:29,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-20 05:37:30,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:32,034 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-20 05:37:32,034 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:37:32,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138880524] [2021-11-20 05:37:32,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138880524] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:32,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:37:32,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-20 05:37:32,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590283916] [2021-11-20 05:37:32,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:37:32,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:37:32,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:37:32,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:37:32,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:37:32,039 INFO L87 Difference]: Start difference. First operand 387 states and 541 transitions. Second operand has 6 states, 5 states have (on average 17.0) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 05:37:32,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:32,534 INFO L93 Difference]: Finished difference Result 776 states and 1092 transitions. [2021-11-20 05:37:32,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:37:32,535 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 17.0) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 175 [2021-11-20 05:37:32,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:32,542 INFO L225 Difference]: With dead ends: 776 [2021-11-20 05:37:32,542 INFO L226 Difference]: Without dead ends: 388 [2021-11-20 05:37:32,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:37:32,547 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 6 mSDsluCounter, 2114 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2647 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:32,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2647 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:37:32,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-20 05:37:32,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2021-11-20 05:37:32,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 300 states have (on average 1.3833333333333333) internal successors, (415), 303 states have internal predecessors, (415), 64 states have call successors, (64), 24 states have call predecessors, (64), 23 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2021-11-20 05:37:32,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 542 transitions. [2021-11-20 05:37:32,601 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 542 transitions. Word has length 175 [2021-11-20 05:37:32,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:32,602 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 542 transitions. [2021-11-20 05:37:32,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 17.0) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 05:37:32,603 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 542 transitions. [2021-11-20 05:37:32,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-20 05:37:32,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:32,608 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 05:37:32,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:32,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:37:32,824 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:37:32,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:32,825 INFO L85 PathProgramCache]: Analyzing trace with hash -462479994, now seen corresponding path program 1 times [2021-11-20 05:37:32,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:37:32,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018827904] [2021-11-20 05:37:32,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:32,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:37:32,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:37:32,831 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:37:32,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 05:37:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:34,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:37:34,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-20 05:37:35,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-20 05:37:36,486 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:37:36,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018827904] [2021-11-20 05:37:36,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018827904] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:37:36,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:37:36,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-20 05:37:36,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588726451] [2021-11-20 05:37:36,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:37:36,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:37:36,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:37:36,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:37:36,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:37:36,491 INFO L87 Difference]: Start difference. First operand 388 states and 542 transitions. Second operand has 11 states, 9 states have (on average 13.222222222222221) internal successors, (119), 11 states have internal predecessors, (119), 4 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2021-11-20 05:37:37,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:37,182 INFO L93 Difference]: Finished difference Result 783 states and 1100 transitions. [2021-11-20 05:37:37,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:37:37,184 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.222222222222221) internal successors, (119), 11 states have internal predecessors, (119), 4 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) Word has length 180 [2021-11-20 05:37:37,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:37,188 INFO L225 Difference]: With dead ends: 783 [2021-11-20 05:37:37,188 INFO L226 Difference]: Without dead ends: 394 [2021-11-20 05:37:37,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:37:37,195 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 10 mSDsluCounter, 3170 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3704 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:37,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 3704 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 05:37:37,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-20 05:37:37,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2021-11-20 05:37:37,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 304 states have (on average 1.3782894736842106) internal successors, (419), 307 states have internal predecessors, (419), 65 states have call successors, (65), 25 states have call predecessors, (65), 24 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2021-11-20 05:37:37,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 548 transitions. [2021-11-20 05:37:37,241 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 548 transitions. Word has length 180 [2021-11-20 05:37:37,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:37,243 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 548 transitions. [2021-11-20 05:37:37,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.222222222222221) internal successors, (119), 11 states have internal predecessors, (119), 4 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2021-11-20 05:37:37,244 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 548 transitions. [2021-11-20 05:37:37,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-20 05:37:37,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:37,253 INFO L514 BasicCegarLoop]: trace histogram [10, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:37,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:37,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:37:37,481 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:37:37,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:37,481 INFO L85 PathProgramCache]: Analyzing trace with hash 246407799, now seen corresponding path program 1 times [2021-11-20 05:37:37,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:37:37,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136343301] [2021-11-20 05:37:37,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:37,483 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:37:37,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:37:37,484 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:37:37,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 05:37:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:38,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 1146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:37:38,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 68 proven. 3 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-20 05:37:39,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-11-20 05:37:41,506 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:37:41,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136343301] [2021-11-20 05:37:41,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136343301] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:37:41,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:37:41,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-20 05:37:41,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585028638] [2021-11-20 05:37:41,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:37:41,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 05:37:41,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:37:41,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 05:37:41,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:37:41,510 INFO L87 Difference]: Start difference. First operand 394 states and 548 transitions. Second operand has 13 states, 11 states have (on average 11.363636363636363) internal successors, (125), 13 states have internal predecessors, (125), 4 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2021-11-20 05:37:42,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:42,326 INFO L93 Difference]: Finished difference Result 793 states and 1109 transitions. [2021-11-20 05:37:42,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:37:42,327 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 11.363636363636363) internal successors, (125), 13 states have internal predecessors, (125), 4 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) Word has length 189 [2021-11-20 05:37:42,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:42,332 INFO L225 Difference]: With dead ends: 793 [2021-11-20 05:37:42,332 INFO L226 Difference]: Without dead ends: 395 [2021-11-20 05:37:42,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:37:42,336 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 9 mSDsluCounter, 3711 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4245 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:42,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 4245 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 05:37:42,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-11-20 05:37:42,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2021-11-20 05:37:42,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 305 states have (on average 1.3770491803278688) internal successors, (420), 308 states have internal predecessors, (420), 65 states have call successors, (65), 25 states have call predecessors, (65), 24 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2021-11-20 05:37:42,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 549 transitions. [2021-11-20 05:37:42,363 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 549 transitions. Word has length 189 [2021-11-20 05:37:42,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:42,364 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 549 transitions. [2021-11-20 05:37:42,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 11.363636363636363) internal successors, (125), 13 states have internal predecessors, (125), 4 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2021-11-20 05:37:42,364 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 549 transitions. [2021-11-20 05:37:42,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-20 05:37:42,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:42,370 INFO L514 BasicCegarLoop]: trace histogram [15, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 05:37:42,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:42,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:37:42,596 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:37:42,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:42,597 INFO L85 PathProgramCache]: Analyzing trace with hash 274012102, now seen corresponding path program 2 times [2021-11-20 05:37:42,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:37:42,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254418717] [2021-11-20 05:37:42,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:37:42,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:37:42,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:37:42,601 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:37:42,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 05:37:43,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-20 05:37:43,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:37:43,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:37:43,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2021-11-20 05:37:43,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2021-11-20 05:37:44,390 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:37:44,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254418717] [2021-11-20 05:37:44,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254418717] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:37:44,391 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:37:44,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 05:37:44,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040365519] [2021-11-20 05:37:44,391 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:37:44,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:37:44,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:37:44,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:37:44,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:37:44,393 INFO L87 Difference]: Start difference. First operand 395 states and 549 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-20 05:37:44,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:44,462 INFO L93 Difference]: Finished difference Result 768 states and 1074 transitions. [2021-11-20 05:37:44,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:37:44,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 190 [2021-11-20 05:37:44,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:44,471 INFO L225 Difference]: With dead ends: 768 [2021-11-20 05:37:44,471 INFO L226 Difference]: Without dead ends: 396 [2021-11-20 05:37:44,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:37:44,475 INFO L933 BasicCegarLoop]: 540 mSDtfsCounter, 0 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:44,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1075 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:37:44,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-20 05:37:44,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 396. [2021-11-20 05:37:44,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 306 states have (on average 1.3758169934640523) internal successors, (421), 309 states have internal predecessors, (421), 65 states have call successors, (65), 25 states have call predecessors, (65), 24 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2021-11-20 05:37:44,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 550 transitions. [2021-11-20 05:37:44,501 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 550 transitions. Word has length 190 [2021-11-20 05:37:44,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:44,503 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 550 transitions. [2021-11-20 05:37:44,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-20 05:37:44,503 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 550 transitions. [2021-11-20 05:37:44,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-20 05:37:44,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:44,509 INFO L514 BasicCegarLoop]: trace histogram [15, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:44,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:44,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:37:44,737 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:37:44,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:44,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1020381717, now seen corresponding path program 1 times [2021-11-20 05:37:44,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:37:44,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942239730] [2021-11-20 05:37:44,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:44,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:37:44,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:37:44,742 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:37:44,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 05:37:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:46,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:37:46,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 96 proven. 6 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-20 05:37:46,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:48,742 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-11-20 05:37:48,742 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:37:48,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942239730] [2021-11-20 05:37:48,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942239730] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:37:48,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:37:48,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-20 05:37:48,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385123810] [2021-11-20 05:37:48,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:37:48,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 05:37:48,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:37:48,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 05:37:48,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:37:48,746 INFO L87 Difference]: Start difference. First operand 396 states and 550 transitions. Second operand has 15 states, 13 states have (on average 9.76923076923077) internal successors, (127), 15 states have internal predecessors, (127), 4 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2021-11-20 05:37:49,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:49,789 INFO L93 Difference]: Finished difference Result 797 states and 1113 transitions. [2021-11-20 05:37:49,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 05:37:49,790 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 9.76923076923077) internal successors, (127), 15 states have internal predecessors, (127), 4 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) Word has length 194 [2021-11-20 05:37:49,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:49,794 INFO L225 Difference]: With dead ends: 797 [2021-11-20 05:37:49,795 INFO L226 Difference]: Without dead ends: 397 [2021-11-20 05:37:49,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:37:49,799 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 16 mSDsluCounter, 3716 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 4250 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:49,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 4250 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 05:37:49,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-11-20 05:37:49,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 397. [2021-11-20 05:37:49,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 307 states have (on average 1.3745928338762214) internal successors, (422), 310 states have internal predecessors, (422), 65 states have call successors, (65), 25 states have call predecessors, (65), 24 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2021-11-20 05:37:49,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 551 transitions. [2021-11-20 05:37:49,823 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 551 transitions. Word has length 194 [2021-11-20 05:37:49,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:49,824 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 551 transitions. [2021-11-20 05:37:49,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 9.76923076923077) internal successors, (127), 15 states have internal predecessors, (127), 4 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2021-11-20 05:37:49,825 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 551 transitions. [2021-11-20 05:37:49,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-20 05:37:49,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:49,830 INFO L514 BasicCegarLoop]: trace histogram [20, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 05:37:49,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:50,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:37:50,044 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:37:50,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:50,045 INFO L85 PathProgramCache]: Analyzing trace with hash -430252822, now seen corresponding path program 1 times [2021-11-20 05:37:50,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:37:50,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933834487] [2021-11-20 05:37:50,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:50,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:37:50,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:37:50,048 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:37:50,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 05:37:51,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:51,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 05:37:51,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 229 proven. 10 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-11-20 05:37:52,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 31 proven. 103 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2021-11-20 05:37:54,330 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:37:54,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933834487] [2021-11-20 05:37:54,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933834487] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:37:54,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:37:54,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-11-20 05:37:54,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556833647] [2021-11-20 05:37:54,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:37:54,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 05:37:54,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:37:54,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 05:37:54,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:37:54,333 INFO L87 Difference]: Start difference. First operand 397 states and 551 transitions. Second operand has 17 states, 15 states have (on average 8.333333333333334) internal successors, (125), 17 states have internal predecessors, (125), 4 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-20 05:37:55,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:55,559 INFO L93 Difference]: Finished difference Result 802 states and 1120 transitions. [2021-11-20 05:37:55,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 05:37:55,561 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 8.333333333333334) internal successors, (125), 17 states have internal predecessors, (125), 4 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) Word has length 195 [2021-11-20 05:37:55,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:55,565 INFO L225 Difference]: With dead ends: 802 [2021-11-20 05:37:55,565 INFO L226 Difference]: Without dead ends: 406 [2021-11-20 05:37:55,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-11-20 05:37:55,569 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 23 mSDsluCounter, 5295 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 5828 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:55,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 5828 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 05:37:55,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-11-20 05:37:55,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 406. [2021-11-20 05:37:55,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 315 states have (on average 1.3682539682539683) internal successors, (431), 318 states have internal predecessors, (431), 65 states have call successors, (65), 26 states have call predecessors, (65), 25 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2021-11-20 05:37:55,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 560 transitions. [2021-11-20 05:37:55,596 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 560 transitions. Word has length 195 [2021-11-20 05:37:55,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:55,596 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 560 transitions. [2021-11-20 05:37:55,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 8.333333333333334) internal successors, (125), 17 states have internal predecessors, (125), 4 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-20 05:37:55,597 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 560 transitions. [2021-11-20 05:37:55,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-20 05:37:55,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:55,602 INFO L514 BasicCegarLoop]: trace histogram [23, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:55,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:55,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:37:55,828 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:37:55,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:55,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1360371765, now seen corresponding path program 2 times [2021-11-20 05:37:55,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:37:55,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1472401919] [2021-11-20 05:37:55,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:37:55,831 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:37:55,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:37:55,832 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:37:55,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 05:37:56,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-20 05:37:56,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:37:56,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:37:56,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 503 trivial. 0 not checked. [2021-11-20 05:37:57,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-20 05:37:57,696 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:37:57,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1472401919] [2021-11-20 05:37:57,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1472401919] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:37:57,697 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:37:57,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 05:37:57,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950652495] [2021-11-20 05:37:57,698 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:37:57,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:37:57,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:37:57,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:37:57,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:37:57,700 INFO L87 Difference]: Start difference. First operand 406 states and 560 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-20 05:37:59,819 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:37:59,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:59,856 INFO L93 Difference]: Finished difference Result 793 states and 1108 transitions. [2021-11-20 05:37:59,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:37:59,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 202 [2021-11-20 05:37:59,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:59,863 INFO L225 Difference]: With dead ends: 793 [2021-11-20 05:37:59,863 INFO L226 Difference]: Without dead ends: 416 [2021-11-20 05:37:59,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:37:59,867 INFO L933 BasicCegarLoop]: 541 mSDtfsCounter, 16 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1602 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:59,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 1602 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 05:37:59,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-11-20 05:37:59,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2021-11-20 05:37:59,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 323 states have (on average 1.368421052631579) internal successors, (442), 327 states have internal predecessors, (442), 67 states have call successors, (67), 26 states have call predecessors, (67), 25 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-11-20 05:37:59,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 575 transitions. [2021-11-20 05:37:59,892 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 575 transitions. Word has length 202 [2021-11-20 05:37:59,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:59,893 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 575 transitions. [2021-11-20 05:37:59,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-20 05:37:59,894 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 575 transitions. [2021-11-20 05:37:59,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-20 05:37:59,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:59,900 INFO L514 BasicCegarLoop]: trace histogram [23, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:59,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:00,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:38:00,116 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:00,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:00,117 INFO L85 PathProgramCache]: Analyzing trace with hash -581865830, now seen corresponding path program 1 times [2021-11-20 05:38:00,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:38:00,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815685505] [2021-11-20 05:38:00,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:00,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:38:00,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:38:00,122 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:38:00,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 05:38:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:01,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:38:01,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:02,573 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 271 proven. 15 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-20 05:38:02,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 36 proven. 135 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2021-11-20 05:38:05,008 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:38:05,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815685505] [2021-11-20 05:38:05,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [815685505] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:38:05,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:38:05,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-20 05:38:05,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962170093] [2021-11-20 05:38:05,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:38:05,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 05:38:05,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:38:05,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 05:38:05,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:38:05,011 INFO L87 Difference]: Start difference. First operand 416 states and 575 transitions. Second operand has 19 states, 17 states have (on average 7.705882352941177) internal successors, (131), 19 states have internal predecessors, (131), 4 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-20 05:38:06,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:06,604 INFO L93 Difference]: Finished difference Result 832 states and 1155 transitions. [2021-11-20 05:38:06,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 05:38:06,606 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 7.705882352941177) internal successors, (131), 19 states have internal predecessors, (131), 4 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) Word has length 206 [2021-11-20 05:38:06,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:06,610 INFO L225 Difference]: With dead ends: 832 [2021-11-20 05:38:06,610 INFO L226 Difference]: Without dead ends: 417 [2021-11-20 05:38:06,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-11-20 05:38:06,616 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 29 mSDsluCounter, 6355 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 6888 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:06,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 6888 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 05:38:06,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-11-20 05:38:06,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 417. [2021-11-20 05:38:06,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 324 states have (on average 1.367283950617284) internal successors, (443), 328 states have internal predecessors, (443), 67 states have call successors, (67), 26 states have call predecessors, (67), 25 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-11-20 05:38:06,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 576 transitions. [2021-11-20 05:38:06,640 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 576 transitions. Word has length 206 [2021-11-20 05:38:06,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:06,641 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 576 transitions. [2021-11-20 05:38:06,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 7.705882352941177) internal successors, (131), 19 states have internal predecessors, (131), 4 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-20 05:38:06,641 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 576 transitions. [2021-11-20 05:38:06,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-20 05:38:06,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:06,647 INFO L514 BasicCegarLoop]: trace histogram [26, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:06,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:06,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:38:06,872 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:06,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:06,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1776122837, now seen corresponding path program 1 times [2021-11-20 05:38:06,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:38:06,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011076446] [2021-11-20 05:38:06,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:06,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:38:06,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:38:06,876 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:38:06,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 05:38:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:08,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 1240 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:38:08,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:09,500 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 317 proven. 21 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2021-11-20 05:38:09,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:12,321 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 41 proven. 172 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2021-11-20 05:38:12,322 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:38:12,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011076446] [2021-11-20 05:38:12,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011076446] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:38:12,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:38:12,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-11-20 05:38:12,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609614585] [2021-11-20 05:38:12,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:38:12,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 05:38:12,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:38:12,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 05:38:12,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-11-20 05:38:12,324 INFO L87 Difference]: Start difference. First operand 417 states and 576 transitions. Second operand has 21 states, 19 states have (on average 7.2105263157894735) internal successors, (137), 21 states have internal predecessors, (137), 4 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-20 05:38:14,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:14,028 INFO L93 Difference]: Finished difference Result 834 states and 1157 transitions. [2021-11-20 05:38:14,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 05:38:14,029 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 7.2105263157894735) internal successors, (137), 21 states have internal predecessors, (137), 4 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) Word has length 213 [2021-11-20 05:38:14,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:14,033 INFO L225 Difference]: With dead ends: 834 [2021-11-20 05:38:14,033 INFO L226 Difference]: Without dead ends: 418 [2021-11-20 05:38:14,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2021-11-20 05:38:14,038 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 30 mSDsluCounter, 6885 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 7418 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:14,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 7418 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 05:38:14,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-20 05:38:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2021-11-20 05:38:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 325 states have (on average 1.366153846153846) internal successors, (444), 329 states have internal predecessors, (444), 67 states have call successors, (67), 26 states have call predecessors, (67), 25 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-11-20 05:38:14,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 577 transitions. [2021-11-20 05:38:14,061 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 577 transitions. Word has length 213 [2021-11-20 05:38:14,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:14,062 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 577 transitions. [2021-11-20 05:38:14,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 7.2105263157894735) internal successors, (137), 21 states have internal predecessors, (137), 4 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-20 05:38:14,062 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 577 transitions. [2021-11-20 05:38:14,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-20 05:38:14,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:14,067 INFO L514 BasicCegarLoop]: trace histogram [29, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:14,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:14,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:38:14,280 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:14,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:14,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1215245914, now seen corresponding path program 2 times [2021-11-20 05:38:14,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:38:14,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843520658] [2021-11-20 05:38:14,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:38:14,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:38:14,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:38:14,285 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:38:14,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 05:38:15,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-20 05:38:15,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:38:15,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:38:15,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 692 trivial. 0 not checked. [2021-11-20 05:38:15,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:16,106 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2021-11-20 05:38:16,106 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:38:16,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843520658] [2021-11-20 05:38:16,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843520658] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:16,107 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:16,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 05:38:16,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405374306] [2021-11-20 05:38:16,108 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:16,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:38:16,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:38:16,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:38:16,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:38:16,110 INFO L87 Difference]: Start difference. First operand 418 states and 577 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-20 05:38:16,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:16,211 INFO L93 Difference]: Finished difference Result 817 states and 1141 transitions. [2021-11-20 05:38:16,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:38:16,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 212 [2021-11-20 05:38:16,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:16,222 INFO L225 Difference]: With dead ends: 817 [2021-11-20 05:38:16,222 INFO L226 Difference]: Without dead ends: 428 [2021-11-20 05:38:16,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:38:16,226 INFO L933 BasicCegarLoop]: 540 mSDtfsCounter, 3 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:16,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1076 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:38:16,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-11-20 05:38:16,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 426. [2021-11-20 05:38:16,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 333 states have (on average 1.3603603603603605) internal successors, (453), 336 states have internal predecessors, (453), 67 states have call successors, (67), 26 states have call predecessors, (67), 25 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-11-20 05:38:16,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 586 transitions. [2021-11-20 05:38:16,249 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 586 transitions. Word has length 212 [2021-11-20 05:38:16,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:16,251 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 586 transitions. [2021-11-20 05:38:16,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-20 05:38:16,251 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 586 transitions. [2021-11-20 05:38:16,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-20 05:38:16,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:16,256 INFO L514 BasicCegarLoop]: trace histogram [29, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:16,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:16,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:38:16,469 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:16,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:16,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1618224366, now seen corresponding path program 1 times [2021-11-20 05:38:16,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:38:16,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848166384] [2021-11-20 05:38:16,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:16,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:38:16,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:38:16,480 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:38:16,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 05:38:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:17,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 05:38:17,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 367 proven. 28 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-11-20 05:38:19,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 46 proven. 214 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2021-11-20 05:38:22,651 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:38:22,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848166384] [2021-11-20 05:38:22,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848166384] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:38:22,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:38:22,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-20 05:38:22,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364485284] [2021-11-20 05:38:22,652 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:38:22,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 05:38:22,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:38:22,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 05:38:22,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-11-20 05:38:22,654 INFO L87 Difference]: Start difference. First operand 426 states and 586 transitions. Second operand has 23 states, 21 states have (on average 6.761904761904762) internal successors, (142), 23 states have internal predecessors, (142), 4 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (35), 4 states have call predecessors, (35), 4 states have call successors, (35) [2021-11-20 05:38:24,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:24,467 INFO L93 Difference]: Finished difference Result 852 states and 1177 transitions. [2021-11-20 05:38:24,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 05:38:24,468 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 6.761904761904762) internal successors, (142), 23 states have internal predecessors, (142), 4 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (35), 4 states have call predecessors, (35), 4 states have call successors, (35) Word has length 229 [2021-11-20 05:38:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:24,472 INFO L225 Difference]: With dead ends: 852 [2021-11-20 05:38:24,473 INFO L226 Difference]: Without dead ends: 427 [2021-11-20 05:38:24,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-11-20 05:38:24,477 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 33 mSDsluCounter, 6884 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 7417 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:24,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 7417 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 05:38:24,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-20 05:38:24,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2021-11-20 05:38:24,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 334 states have (on average 1.3592814371257484) internal successors, (454), 337 states have internal predecessors, (454), 67 states have call successors, (67), 26 states have call predecessors, (67), 25 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-11-20 05:38:24,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 587 transitions. [2021-11-20 05:38:24,501 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 587 transitions. Word has length 229 [2021-11-20 05:38:24,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:24,501 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 587 transitions. [2021-11-20 05:38:24,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 6.761904761904762) internal successors, (142), 23 states have internal predecessors, (142), 4 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (35), 4 states have call predecessors, (35), 4 states have call successors, (35) [2021-11-20 05:38:24,502 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 587 transitions. [2021-11-20 05:38:24,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-20 05:38:24,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:24,507 INFO L514 BasicCegarLoop]: trace histogram [32, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:24,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:24,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:38:24,732 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:24,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:24,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1992533533, now seen corresponding path program 1 times [2021-11-20 05:38:24,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:38:24,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988670587] [2021-11-20 05:38:24,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:24,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:38:24,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:38:24,736 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:38:24,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 05:38:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:26,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:38:26,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:27,725 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-11-20 05:38:27,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-11-20 05:38:28,372 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:38:28,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988670587] [2021-11-20 05:38:28,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988670587] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:28,372 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:28,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 05:38:28,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312232755] [2021-11-20 05:38:28,373 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:28,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:38:28,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:38:28,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:38:28,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:38:28,375 INFO L87 Difference]: Start difference. First operand 427 states and 587 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-20 05:38:28,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:28,612 INFO L93 Difference]: Finished difference Result 865 states and 1191 transitions. [2021-11-20 05:38:28,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:38:28,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 236 [2021-11-20 05:38:28,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:28,618 INFO L225 Difference]: With dead ends: 865 [2021-11-20 05:38:28,619 INFO L226 Difference]: Without dead ends: 465 [2021-11-20 05:38:28,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:38:28,622 INFO L933 BasicCegarLoop]: 541 mSDtfsCounter, 56 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:28,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 1041 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:38:28,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-11-20 05:38:28,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 462. [2021-11-20 05:38:28,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 366 states have (on average 1.355191256830601) internal successors, (496), 369 states have internal predecessors, (496), 68 states have call successors, (68), 28 states have call predecessors, (68), 27 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2021-11-20 05:38:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 631 transitions. [2021-11-20 05:38:28,654 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 631 transitions. Word has length 236 [2021-11-20 05:38:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:28,654 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 631 transitions. [2021-11-20 05:38:28,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-20 05:38:28,655 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 631 transitions. [2021-11-20 05:38:28,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-11-20 05:38:28,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:28,660 INFO L514 BasicCegarLoop]: trace histogram [32, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:28,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:28,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:38:28,876 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:28,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:28,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1527681139, now seen corresponding path program 1 times [2021-11-20 05:38:28,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:38:28,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705723963] [2021-11-20 05:38:28,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:28,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:38:28,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:38:28,881 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:38:28,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 05:38:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:31,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 1436 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:38:31,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:32,180 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2021-11-20 05:38:32,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2021-11-20 05:38:32,973 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:38:32,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705723963] [2021-11-20 05:38:32,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705723963] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:32,973 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:32,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-20 05:38:32,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810859255] [2021-11-20 05:38:32,974 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:32,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:38:32,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:38:32,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:38:32,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:38:32,976 INFO L87 Difference]: Start difference. First operand 462 states and 631 transitions. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-20 05:38:33,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:33,254 INFO L93 Difference]: Finished difference Result 885 states and 1219 transitions. [2021-11-20 05:38:33,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:38:33,255 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 283 [2021-11-20 05:38:33,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:33,260 INFO L225 Difference]: With dead ends: 885 [2021-11-20 05:38:33,260 INFO L226 Difference]: Without dead ends: 460 [2021-11-20 05:38:33,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:38:33,263 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 9 mSDsluCounter, 2675 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 3213 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:33,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 3213 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:38:33,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-20 05:38:33,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 460. [2021-11-20 05:38:33,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 364 states have (on average 1.348901098901099) internal successors, (491), 367 states have internal predecessors, (491), 68 states have call successors, (68), 28 states have call predecessors, (68), 27 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2021-11-20 05:38:33,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 626 transitions. [2021-11-20 05:38:33,291 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 626 transitions. Word has length 283 [2021-11-20 05:38:33,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:33,292 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 626 transitions. [2021-11-20 05:38:33,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-20 05:38:33,293 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 626 transitions. [2021-11-20 05:38:33,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-11-20 05:38:33,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:33,298 INFO L514 BasicCegarLoop]: trace histogram [32, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:33,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:33,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:38:33,521 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:33,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:33,521 INFO L85 PathProgramCache]: Analyzing trace with hash -998274672, now seen corresponding path program 1 times [2021-11-20 05:38:33,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:38:33,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270926903] [2021-11-20 05:38:33,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:33,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:38:33,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:38:33,525 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:38:33,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 05:38:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:36,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 1472 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:38:36,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2021-11-20 05:38:37,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2021-11-20 05:38:38,133 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:38:38,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270926903] [2021-11-20 05:38:38,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270926903] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:38,134 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:38,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 05:38:38,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476388534] [2021-11-20 05:38:38,135 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:38,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:38:38,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:38:38,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:38:38,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:38:38,137 INFO L87 Difference]: Start difference. First operand 460 states and 626 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 4 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2021-11-20 05:38:38,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:38,585 INFO L93 Difference]: Finished difference Result 960 states and 1327 transitions. [2021-11-20 05:38:38,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:38:38,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 4 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) Word has length 290 [2021-11-20 05:38:38,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:38,593 INFO L225 Difference]: With dead ends: 960 [2021-11-20 05:38:38,593 INFO L226 Difference]: Without dead ends: 543 [2021-11-20 05:38:38,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 576 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:38:38,598 INFO L933 BasicCegarLoop]: 565 mSDtfsCounter, 146 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:38,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 1084 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:38:38,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-11-20 05:38:38,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 537. [2021-11-20 05:38:38,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 435 states have (on average 1.360919540229885) internal successors, (592), 438 states have internal predecessors, (592), 70 states have call successors, (70), 32 states have call predecessors, (70), 31 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2021-11-20 05:38:38,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 731 transitions. [2021-11-20 05:38:38,629 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 731 transitions. Word has length 290 [2021-11-20 05:38:38,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:38,632 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 731 transitions. [2021-11-20 05:38:38,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 4 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2021-11-20 05:38:38,633 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 731 transitions. [2021-11-20 05:38:38,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-11-20 05:38:38,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:38,638 INFO L514 BasicCegarLoop]: trace histogram [32, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:38,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:38,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:38:38,861 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:38,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:38,861 INFO L85 PathProgramCache]: Analyzing trace with hash 643253764, now seen corresponding path program 1 times [2021-11-20 05:38:38,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:38:38,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1830003087] [2021-11-20 05:38:38,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:38,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:38:38,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:38:38,865 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:38:38,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 05:38:41,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:41,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 1496 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:38:41,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:42,350 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2021-11-20 05:38:42,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2021-11-20 05:38:43,070 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:38:43,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1830003087] [2021-11-20 05:38:43,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1830003087] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:43,071 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:43,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 05:38:43,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542249290] [2021-11-20 05:38:43,071 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:43,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:38:43,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:38:43,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:38:43,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:38:43,073 INFO L87 Difference]: Start difference. First operand 537 states and 731 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-20 05:38:43,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:43,136 INFO L93 Difference]: Finished difference Result 1176 states and 1630 transitions. [2021-11-20 05:38:43,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:38:43,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 301 [2021-11-20 05:38:43,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:43,145 INFO L225 Difference]: With dead ends: 1176 [2021-11-20 05:38:43,145 INFO L226 Difference]: Without dead ends: 682 [2021-11-20 05:38:43,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 599 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:38:43,148 INFO L933 BasicCegarLoop]: 608 mSDtfsCounter, 76 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:43,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 1143 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:38:43,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-11-20 05:38:43,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 538. [2021-11-20 05:38:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 436 states have (on average 1.360091743119266) internal successors, (593), 439 states have internal predecessors, (593), 70 states have call successors, (70), 32 states have call predecessors, (70), 31 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2021-11-20 05:38:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 732 transitions. [2021-11-20 05:38:43,216 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 732 transitions. Word has length 301 [2021-11-20 05:38:43,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:43,217 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 732 transitions. [2021-11-20 05:38:43,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-20 05:38:43,218 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 732 transitions. [2021-11-20 05:38:43,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-11-20 05:38:43,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:43,223 INFO L514 BasicCegarLoop]: trace histogram [32, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:43,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:43,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:38:43,437 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:43,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:43,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1795232234, now seen corresponding path program 1 times [2021-11-20 05:38:43,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:38:43,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335400030] [2021-11-20 05:38:43,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:43,440 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:38:43,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:38:43,441 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:38:43,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 05:38:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:45,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 1507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:38:45,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2021-11-20 05:38:46,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2021-11-20 05:38:47,486 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:38:47,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335400030] [2021-11-20 05:38:47,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335400030] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:47,486 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:47,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 05:38:47,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127048308] [2021-11-20 05:38:47,487 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:47,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:38:47,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:38:47,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:38:47,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:38:47,489 INFO L87 Difference]: Start difference. First operand 538 states and 732 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-20 05:38:47,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:47,560 INFO L93 Difference]: Finished difference Result 1037 states and 1424 transitions. [2021-11-20 05:38:47,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:38:47,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 304 [2021-11-20 05:38:47,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:47,566 INFO L225 Difference]: With dead ends: 1037 [2021-11-20 05:38:47,566 INFO L226 Difference]: Without dead ends: 542 [2021-11-20 05:38:47,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 604 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:38:47,570 INFO L933 BasicCegarLoop]: 535 mSDtfsCounter, 0 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:47,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1601 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:38:47,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-11-20 05:38:47,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 542. [2021-11-20 05:38:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 440 states have (on average 1.356818181818182) internal successors, (597), 443 states have internal predecessors, (597), 70 states have call successors, (70), 32 states have call predecessors, (70), 31 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2021-11-20 05:38:47,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 736 transitions. [2021-11-20 05:38:47,599 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 736 transitions. Word has length 304 [2021-11-20 05:38:47,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:47,600 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 736 transitions. [2021-11-20 05:38:47,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-20 05:38:47,600 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 736 transitions. [2021-11-20 05:38:47,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-11-20 05:38:47,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:47,606 INFO L514 BasicCegarLoop]: trace histogram [32, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:47,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:47,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:38:47,832 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:47,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:47,833 INFO L85 PathProgramCache]: Analyzing trace with hash -723037763, now seen corresponding path program 1 times [2021-11-20 05:38:47,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:38:47,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031871756] [2021-11-20 05:38:47,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:47,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:38:47,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:38:47,836 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:38:47,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 05:38:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:50,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 1497 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:38:50,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 844 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 838 trivial. 0 not checked. [2021-11-20 05:38:51,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 844 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 838 trivial. 0 not checked. [2021-11-20 05:38:52,079 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:38:52,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031871756] [2021-11-20 05:38:52,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031871756] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:38:52,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:38:52,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-20 05:38:52,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510008974] [2021-11-20 05:38:52,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:38:52,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:38:52,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:38:52,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:38:52,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:38:52,082 INFO L87 Difference]: Start difference. First operand 542 states and 736 transitions. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-20 05:38:52,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:52,375 INFO L93 Difference]: Finished difference Result 1049 states and 1438 transitions. [2021-11-20 05:38:52,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:38:52,376 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 301 [2021-11-20 05:38:52,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:52,382 INFO L225 Difference]: With dead ends: 1049 [2021-11-20 05:38:52,382 INFO L226 Difference]: Without dead ends: 550 [2021-11-20 05:38:52,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 594 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:38:52,386 INFO L933 BasicCegarLoop]: 537 mSDtfsCounter, 0 mSDsluCounter, 2137 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2674 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:52,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2674 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:38:52,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-20 05:38:52,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2021-11-20 05:38:52,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 448 states have (on average 1.3504464285714286) internal successors, (605), 451 states have internal predecessors, (605), 70 states have call successors, (70), 32 states have call predecessors, (70), 31 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2021-11-20 05:38:52,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 744 transitions. [2021-11-20 05:38:52,444 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 744 transitions. Word has length 301 [2021-11-20 05:38:52,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:52,445 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 744 transitions. [2021-11-20 05:38:52,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-20 05:38:52,445 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 744 transitions. [2021-11-20 05:38:52,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-11-20 05:38:52,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:52,450 INFO L514 BasicCegarLoop]: trace histogram [32, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:52,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:52,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:38:52,677 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:52,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:52,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1034854959, now seen corresponding path program 2 times [2021-11-20 05:38:52,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:38:52,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058356473] [2021-11-20 05:38:52,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:38:52,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:38:52,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:38:52,688 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:38:52,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 05:39:05,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:39:05,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:39:05,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 1521 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:39:05,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:39:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 838 trivial. 0 not checked. [2021-11-20 05:39:06,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:39:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 838 trivial. 0 not checked. [2021-11-20 05:39:07,758 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:39:07,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058356473] [2021-11-20 05:39:07,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058356473] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:39:07,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:39:07,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-20 05:39:07,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457882477] [2021-11-20 05:39:07,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:39:07,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 05:39:07,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:39:07,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 05:39:07,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:39:07,761 INFO L87 Difference]: Start difference. First operand 550 states and 744 transitions. Second operand has 16 states, 16 states have (on average 10.75) internal successors, (172), 16 states have internal predecessors, (172), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-20 05:39:08,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:39:08,874 INFO L93 Difference]: Finished difference Result 1073 states and 1466 transitions. [2021-11-20 05:39:08,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 05:39:08,875 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.75) internal successors, (172), 16 states have internal predecessors, (172), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 309 [2021-11-20 05:39:08,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:39:08,881 INFO L225 Difference]: With dead ends: 1073 [2021-11-20 05:39:08,881 INFO L226 Difference]: Without dead ends: 566 [2021-11-20 05:39:08,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 602 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-20 05:39:08,885 INFO L933 BasicCegarLoop]: 541 mSDtfsCounter, 0 mSDsluCounter, 5369 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5910 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:39:08,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 5910 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 05:39:08,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-20 05:39:08,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2021-11-20 05:39:08,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 464 states have (on average 1.3383620689655173) internal successors, (621), 467 states have internal predecessors, (621), 70 states have call successors, (70), 32 states have call predecessors, (70), 31 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2021-11-20 05:39:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 760 transitions. [2021-11-20 05:39:08,914 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 760 transitions. Word has length 309 [2021-11-20 05:39:08,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:39:08,915 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 760 transitions. [2021-11-20 05:39:08,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.75) internal successors, (172), 16 states have internal predecessors, (172), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-20 05:39:08,915 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 760 transitions. [2021-11-20 05:39:08,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-11-20 05:39:08,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:39:08,921 INFO L514 BasicCegarLoop]: trace histogram [32, 15, 14, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:39:08,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-20 05:39:09,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:39:09,145 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:39:09,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:39:09,145 INFO L85 PathProgramCache]: Analyzing trace with hash 216521700, now seen corresponding path program 1 times [2021-11-20 05:39:09,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:39:09,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936692137] [2021-11-20 05:39:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:39:09,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:39:09,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:39:09,150 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:39:09,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 05:39:11,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:39:11,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 1591 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 05:39:11,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:39:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2021-11-20 05:39:13,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:39:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2021-11-20 05:39:15,562 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:39:15,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936692137] [2021-11-20 05:39:15,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936692137] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:39:15,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:39:15,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-11-20 05:39:15,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749580653] [2021-11-20 05:39:15,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:39:15,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 05:39:15,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:39:15,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 05:39:15,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-11-20 05:39:15,566 INFO L87 Difference]: Start difference. First operand 566 states and 760 transitions. Second operand has 32 states, 32 states have (on average 6.53125) internal successors, (209), 32 states have internal predecessors, (209), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-20 05:39:17,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:39:17,119 INFO L93 Difference]: Finished difference Result 1091 states and 1477 transitions. [2021-11-20 05:39:17,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 05:39:17,120 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.53125) internal successors, (209), 32 states have internal predecessors, (209), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 332 [2021-11-20 05:39:17,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:39:17,125 INFO L225 Difference]: With dead ends: 1091 [2021-11-20 05:39:17,126 INFO L226 Difference]: Without dead ends: 568 [2021-11-20 05:39:17,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 632 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-11-20 05:39:17,130 INFO L933 BasicCegarLoop]: 549 mSDtfsCounter, 0 mSDsluCounter, 8200 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8749 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:39:17,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8749 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 05:39:17,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-20 05:39:17,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-20 05:39:17,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 466 states have (on average 1.3369098712446352) internal successors, (623), 469 states have internal predecessors, (623), 70 states have call successors, (70), 32 states have call predecessors, (70), 31 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2021-11-20 05:39:17,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 762 transitions. [2021-11-20 05:39:17,175 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 762 transitions. Word has length 332 [2021-11-20 05:39:17,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:39:17,176 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 762 transitions. [2021-11-20 05:39:17,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.53125) internal successors, (209), 32 states have internal predecessors, (209), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-20 05:39:17,177 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 762 transitions. [2021-11-20 05:39:17,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-11-20 05:39:17,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:39:17,182 INFO L514 BasicCegarLoop]: trace histogram [32, 16, 15, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:39:17,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-20 05:39:17,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:39:17,396 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:39:17,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:39:17,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1040624908, now seen corresponding path program 1 times [2021-11-20 05:39:17,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:39:17,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [695877309] [2021-11-20 05:39:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:39:17,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:39:17,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:39:17,402 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:39:17,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 05:39:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:39:20,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 1583 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:39:20,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:39:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 1048 trivial. 0 not checked. [2021-11-20 05:39:20,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:39:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1078 trivial. 0 not checked. [2021-11-20 05:39:21,489 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:39:21,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [695877309] [2021-11-20 05:39:21,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [695877309] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:39:21,489 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:39:21,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 05:39:21,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391473539] [2021-11-20 05:39:21,490 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:39:21,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:39:21,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:39:21,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:39:21,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:39:21,492 INFO L87 Difference]: Start difference. First operand 568 states and 762 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-20 05:39:21,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:39:21,552 INFO L93 Difference]: Finished difference Result 1096 states and 1483 transitions. [2021-11-20 05:39:21,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:39:21,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 330 [2021-11-20 05:39:21,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:39:21,559 INFO L225 Difference]: With dead ends: 1096 [2021-11-20 05:39:21,560 INFO L226 Difference]: Without dead ends: 571 [2021-11-20 05:39:21,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 656 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:39:21,564 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 2 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:39:21,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1071 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:39:21,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-20 05:39:21,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 569. [2021-11-20 05:39:21,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 467 states have (on average 1.3361884368308352) internal successors, (624), 470 states have internal predecessors, (624), 70 states have call successors, (70), 32 states have call predecessors, (70), 31 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2021-11-20 05:39:21,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 763 transitions. [2021-11-20 05:39:21,594 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 763 transitions. Word has length 330 [2021-11-20 05:39:21,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:39:21,595 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 763 transitions. [2021-11-20 05:39:21,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-20 05:39:21,596 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 763 transitions. [2021-11-20 05:39:21,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-11-20 05:39:21,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:39:21,602 INFO L514 BasicCegarLoop]: trace histogram [32, 16, 15, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:39:21,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-20 05:39:21,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:39:21,819 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:39:21,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:39:21,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1914493591, now seen corresponding path program 1 times [2021-11-20 05:39:21,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:39:21,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022732011] [2021-11-20 05:39:21,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:39:21,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:39:21,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:39:21,824 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:39:21,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 05:39:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:39:24,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 1589 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:39:24,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:39:25,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2021-11-20 05:39:25,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:39:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2021-11-20 05:39:25,969 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:39:25,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022732011] [2021-11-20 05:39:25,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022732011] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:39:25,970 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:39:25,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 05:39:25,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700807713] [2021-11-20 05:39:25,970 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:39:25,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:39:25,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:39:25,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:39:25,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:39:25,972 INFO L87 Difference]: Start difference. First operand 569 states and 763 transitions. Second operand has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-20 05:39:26,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:39:26,197 INFO L93 Difference]: Finished difference Result 1097 states and 1483 transitions. [2021-11-20 05:39:26,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:39:26,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 331 [2021-11-20 05:39:26,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:39:26,205 INFO L225 Difference]: With dead ends: 1097 [2021-11-20 05:39:26,206 INFO L226 Difference]: Without dead ends: 571 [2021-11-20 05:39:26,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 656 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:39:26,209 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 806 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:39:26,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 1148 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:39:26,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-20 05:39:26,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 569. [2021-11-20 05:39:26,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 467 states have (on average 1.3319057815845825) internal successors, (622), 470 states have internal predecessors, (622), 70 states have call successors, (70), 32 states have call predecessors, (70), 31 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2021-11-20 05:39:26,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 761 transitions. [2021-11-20 05:39:26,242 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 761 transitions. Word has length 331 [2021-11-20 05:39:26,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:39:26,243 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 761 transitions. [2021-11-20 05:39:26,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-20 05:39:26,243 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 761 transitions. [2021-11-20 05:39:26,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2021-11-20 05:39:26,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:39:26,249 INFO L514 BasicCegarLoop]: trace histogram [32, 16, 15, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:39:26,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-20 05:39:26,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:39:26,464 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:39:26,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:39:26,465 INFO L85 PathProgramCache]: Analyzing trace with hash -409449959, now seen corresponding path program 1 times [2021-11-20 05:39:26,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:39:26,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886620039] [2021-11-20 05:39:26,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:39:26,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:39:26,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:39:26,469 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:39:26,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-20 05:39:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:39:29,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 1653 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:39:29,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:39:29,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 73 [2021-11-20 05:39:30,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 1065 trivial. 0 not checked. [2021-11-20 05:39:30,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:39:30,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 86 [2021-11-20 05:39:32,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1125 trivial. 0 not checked. [2021-11-20 05:39:32,515 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:39:32,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [886620039] [2021-11-20 05:39:32,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [886620039] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:39:32,516 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:39:32,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 05:39:32,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216224721] [2021-11-20 05:39:32,517 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:39:32,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:39:32,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:39:32,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:39:32,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:39:32,519 INFO L87 Difference]: Start difference. First operand 569 states and 761 transitions. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-20 05:39:32,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:39:32,716 INFO L93 Difference]: Finished difference Result 1099 states and 1482 transitions. [2021-11-20 05:39:32,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:39:32,718 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 353 [2021-11-20 05:39:32,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:39:32,724 INFO L225 Difference]: With dead ends: 1099 [2021-11-20 05:39:32,725 INFO L226 Difference]: Without dead ends: 573 [2021-11-20 05:39:32,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 700 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:39:32,730 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 4 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2133 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:39:32,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 2133 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:39:32,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-11-20 05:39:32,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 571. [2021-11-20 05:39:32,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 469 states have (on average 1.3304904051172708) internal successors, (624), 472 states have internal predecessors, (624), 70 states have call successors, (70), 32 states have call predecessors, (70), 31 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2021-11-20 05:39:32,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 763 transitions. [2021-11-20 05:39:32,761 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 763 transitions. Word has length 353 [2021-11-20 05:39:32,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:39:32,762 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 763 transitions. [2021-11-20 05:39:32,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-20 05:39:32,768 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 763 transitions. [2021-11-20 05:39:32,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-11-20 05:39:32,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:39:32,774 INFO L514 BasicCegarLoop]: trace histogram [32, 16, 15, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:39:32,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-20 05:39:32,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:39:32,994 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:39:32,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:39:32,994 INFO L85 PathProgramCache]: Analyzing trace with hash 20845571, now seen corresponding path program 1 times [2021-11-20 05:39:32,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:39:32,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877513277] [2021-11-20 05:39:32,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:39:32,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:39:32,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:39:32,999 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:39:33,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-20 05:39:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:39:35,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 1645 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 05:39:35,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:39:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2021-11-20 05:39:36,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:39:37,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1125 trivial. 0 not checked. [2021-11-20 05:39:37,568 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:39:37,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877513277] [2021-11-20 05:39:37,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877513277] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:39:37,568 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:39:37,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 05:39:37,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797098030] [2021-11-20 05:39:37,569 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:39:37,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:39:37,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:39:37,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:39:37,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:39:37,570 INFO L87 Difference]: Start difference. First operand 571 states and 763 transitions. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-20 05:39:37,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:39:37,898 INFO L93 Difference]: Finished difference Result 1105 states and 1489 transitions. [2021-11-20 05:39:37,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:39:37,908 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 351 [2021-11-20 05:39:37,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:39:37,915 INFO L225 Difference]: With dead ends: 1105 [2021-11-20 05:39:37,915 INFO L226 Difference]: Without dead ends: 577 [2021-11-20 05:39:37,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 696 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:39:37,919 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 11 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1599 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:39:37,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1599 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:39:37,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-20 05:39:37,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 573. [2021-11-20 05:39:37,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 471 states have (on average 1.3290870488322717) internal successors, (626), 474 states have internal predecessors, (626), 70 states have call successors, (70), 32 states have call predecessors, (70), 31 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2021-11-20 05:39:37,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 765 transitions. [2021-11-20 05:39:37,954 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 765 transitions. Word has length 351 [2021-11-20 05:39:37,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:39:37,956 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 765 transitions. [2021-11-20 05:39:37,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-20 05:39:37,956 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 765 transitions. [2021-11-20 05:39:37,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2021-11-20 05:39:37,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:39:37,987 INFO L514 BasicCegarLoop]: trace histogram [32, 16, 15, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:39:38,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-20 05:39:38,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:39:38,213 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:39:38,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:39:38,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1750196416, now seen corresponding path program 1 times [2021-11-20 05:39:38,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:39:38,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014975323] [2021-11-20 05:39:38,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:39:38,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:39:38,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:39:38,217 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:39:38,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-20 05:39:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:39:41,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 1655 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:39:41,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:39:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2021-11-20 05:39:42,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:39:42,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1119 trivial. 0 not checked. [2021-11-20 05:39:42,949 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:39:42,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014975323] [2021-11-20 05:39:42,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014975323] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:39:42,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:39:42,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-20 05:39:42,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684282756] [2021-11-20 05:39:42,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:39:42,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:39:42,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:39:42,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:39:42,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:39:42,952 INFO L87 Difference]: Start difference. First operand 573 states and 765 transitions. Second operand has 8 states, 8 states have (on average 19.25) internal successors, (154), 8 states have internal predecessors, (154), 4 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-20 05:39:44,646 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:39:46,260 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:39:48,625 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:39:48,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:39:48,712 INFO L93 Difference]: Finished difference Result 1145 states and 1553 transitions. [2021-11-20 05:39:48,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:39:48,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.25) internal successors, (154), 8 states have internal predecessors, (154), 4 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 354 [2021-11-20 05:39:48,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:39:48,718 INFO L225 Difference]: With dead ends: 1145 [2021-11-20 05:39:48,719 INFO L226 Difference]: Without dead ends: 615 [2021-11-20 05:39:48,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 700 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:39:48,723 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 54 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 2168 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:39:48,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 2168 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2021-11-20 05:39:48,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-11-20 05:39:48,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 615. [2021-11-20 05:39:48,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 507 states have (on average 1.3293885601577908) internal successors, (674), 513 states have internal predecessors, (674), 76 states have call successors, (76), 32 states have call predecessors, (76), 31 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2021-11-20 05:39:48,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 825 transitions. [2021-11-20 05:39:48,756 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 825 transitions. Word has length 354 [2021-11-20 05:39:48,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:39:48,757 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 825 transitions. [2021-11-20 05:39:48,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.25) internal successors, (154), 8 states have internal predecessors, (154), 4 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-20 05:39:48,758 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 825 transitions. [2021-11-20 05:39:48,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-11-20 05:39:48,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:39:48,764 INFO L514 BasicCegarLoop]: trace histogram [32, 16, 15, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:39:48,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-20 05:39:48,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:39:48,989 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:39:48,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:39:48,989 INFO L85 PathProgramCache]: Analyzing trace with hash 63696949, now seen corresponding path program 1 times [2021-11-20 05:39:48,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:39:48,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484986758] [2021-11-20 05:39:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:39:48,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:39:48,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:39:48,994 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:39:49,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf8bba7-304b-4a9a-b60f-0bd6910250f5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-20 05:40:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:40:18,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 1681 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-20 05:40:18,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:40:18,927 INFO L354 Elim1Store]: treesize reduction 345, result has 15.0 percent of original size [2021-11-20 05:40:18,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 134 [2021-11-20 05:42:16,696 INFO L354 Elim1Store]: treesize reduction 210, result has 25.8 percent of original size [2021-11-20 05:42:16,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 137 treesize of output 194 [2021-11-20 05:42:24,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-20 05:42:25,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-20 05:42:26,309 INFO L354 Elim1Store]: treesize reduction 237, result has 19.4 percent of original size [2021-11-20 05:42:26,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 207 treesize of output 248 [2021-11-20 05:42:32,299 INFO L354 Elim1Store]: treesize reduction 224, result has 0.4 percent of original size [2021-11-20 05:42:32,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 283 treesize of output 267 [2021-11-20 05:42:32,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-20 05:42:32,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-20 05:42:34,039 INFO L354 Elim1Store]: treesize reduction 304, result has 17.6 percent of original size [2021-11-20 05:42:34,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 295 treesize of output 342 [2021-11-20 05:42:57,155 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-20 05:42:57,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-11-20 05:42:57,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:42:57,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-20 05:43:18,513 INFO L354 Elim1Store]: treesize reduction 348, result has 21.1 percent of original size [2021-11-20 05:43:18,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 342 treesize of output 415 [2021-11-20 05:47:14,215 WARN L227 SmtUtils]: Spent 12.98s on a formula simplification. DAG size of input: 316 DAG size of output: 213 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)