./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_x25.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_x25.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y --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 9ca2eb28b930065096f039703bc8c545a25de7919cc90a3441476b4fab43b08c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:11:04,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:11:04,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:11:04,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:11:04,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:11:04,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:11:04,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:11:04,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:11:04,647 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:11:04,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:11:04,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:11:04,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:11:04,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:11:04,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:11:04,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:11:04,668 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:11:04,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:11:04,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:11:04,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:11:04,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:11:04,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:11:04,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:11:04,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:11:04,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:11:04,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:11:04,702 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:11:04,703 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:11:04,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:11:04,706 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:11:04,707 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:11:04,708 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:11:04,709 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:11:04,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:11:04,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:11:04,715 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:11:04,715 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:11:04,716 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:11:04,716 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:11:04,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:11:04,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:11:04,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:11:04,720 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-13 18:11:04,767 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:11:04,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:11:04,768 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:11:04,769 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:11:04,770 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:11:04,770 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:11:04,778 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:11:04,778 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:11:04,779 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:11:04,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:11:04,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:11:04,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:11:04,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:11:04,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:11:04,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:11:04,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:11:04,782 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:11:04,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:11:04,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:11:04,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:11:04,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:11:04,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:11:04,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:11:04,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:11:04,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:11:04,785 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:11:04,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:11:04,785 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:11:04,785 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:11:04,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:11:04,787 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:11:04,788 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_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ca2eb28b930065096f039703bc8c545a25de7919cc90a3441476b4fab43b08c [2021-11-13 18:11:05,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:11:05,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:11:05,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:11:05,161 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:11:05,162 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:11:05,163 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_x25.ko-entry_point.cil.out.i [2021-11-13 18:11:05,231 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/data/480a35533/8b9a112c06cb43b5bf8520effe6f82d4/FLAG10c3507e5 [2021-11-13 18:11:06,118 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:11:06,121 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_x25.ko-entry_point.cil.out.i [2021-11-13 18:11:06,188 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/data/480a35533/8b9a112c06cb43b5bf8520effe6f82d4/FLAG10c3507e5 [2021-11-13 18:11:06,645 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/data/480a35533/8b9a112c06cb43b5bf8520effe6f82d4 [2021-11-13 18:11:06,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:11:06,649 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:11:06,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:11:06,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:11:06,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:11:06,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:11:06" (1/1) ... [2021-11-13 18:11:06,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@582f213c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:06, skipping insertion in model container [2021-11-13 18:11:06,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:11:06" (1/1) ... [2021-11-13 18:11:06,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:11:06,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:11:07,632 WARN L228 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_433cfdac-8e86-4612-aa5e-ecef35f945f7/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_x25.ko-entry_point.cil.out.i[152690,152703] [2021-11-13 18:11:07,930 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:11:07,948 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:11:08,181 WARN L228 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_433cfdac-8e86-4612-aa5e-ecef35f945f7/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_x25.ko-entry_point.cil.out.i[152690,152703] [2021-11-13 18:11:08,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:11:08,304 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:11:08,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:08 WrapperNode [2021-11-13 18:11:08,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:11:08,308 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:11:08,308 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:11:08,308 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:11:08,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:08" (1/1) ... [2021-11-13 18:11:08,358 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:08" (1/1) ... [2021-11-13 18:11:08,430 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:11:08,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:11:08,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:11:08,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:11:08,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:08" (1/1) ... [2021-11-13 18:11:08,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:08" (1/1) ... [2021-11-13 18:11:08,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:08" (1/1) ... [2021-11-13 18:11:08,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:08" (1/1) ... [2021-11-13 18:11:08,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:08" (1/1) ... [2021-11-13 18:11:08,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:08" (1/1) ... [2021-11-13 18:11:08,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:08" (1/1) ... [2021-11-13 18:11:08,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:11:08,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:11:08,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:11:08,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:11:08,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:08" (1/1) ... [2021-11-13 18:11:08,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:11:08,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:11:08,604 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:11:08,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:11:08,650 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 18:11:08,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 18:11:08,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:11:08,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-13 18:11:08,652 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-13 18:11:08,652 INFO L130 BoogieDeclarations]: Found specification of procedure dev_to_hdlc [2021-11-13 18:11:08,652 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_to_hdlc [2021-11-13 18:11:08,652 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2021-11-13 18:11:08,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2021-11-13 18:11:08,652 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 18:11:08,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 18:11:08,683 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-11-13 18:11:08,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-11-13 18:11:08,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:11:08,683 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 18:11:08,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 18:11:08,684 INFO L130 BoogieDeclarations]: Found specification of procedure x25_ioctl [2021-11-13 18:11:08,684 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_ioctl [2021-11-13 18:11:08,684 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-13 18:11:08,684 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-13 18:11:08,684 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 18:11:08,684 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 18:11:08,684 INFO L130 BoogieDeclarations]: Found specification of procedure x25_connect_disconnect [2021-11-13 18:11:08,684 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_connect_disconnect [2021-11-13 18:11:08,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:11:08,684 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2021-11-13 18:11:08,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2021-11-13 18:11:08,685 INFO L130 BoogieDeclarations]: Found specification of procedure x25_type_trans [2021-11-13 18:11:08,685 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_type_trans [2021-11-13 18:11:08,685 INFO L130 BoogieDeclarations]: Found specification of procedure x25_xmit [2021-11-13 18:11:08,685 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_xmit [2021-11-13 18:11:08,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:11:08,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:11:08,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:11:08,685 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-11-13 18:11:08,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-11-13 18:11:08,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:11:08,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 18:11:08,686 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_successful_zalloc [2021-11-13 18:11:08,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_successful_zalloc [2021-11-13 18:11:08,686 INFO L130 BoogieDeclarations]: Found specification of procedure x25_rx [2021-11-13 18:11:08,686 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_rx [2021-11-13 18:11:08,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:11:08,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:11:08,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:11:09,479 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 18:11:09,907 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:11:09,907 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 18:11:09,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:11:09 BoogieIcfgContainer [2021-11-13 18:11:09,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:11:09,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:11:09,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:11:09,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:11:09,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:11:06" (1/3) ... [2021-11-13 18:11:09,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4efc18f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:11:09, skipping insertion in model container [2021-11-13 18:11:09,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:08" (2/3) ... [2021-11-13 18:11:09,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4efc18f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:11:09, skipping insertion in model container [2021-11-13 18:11:09,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:11:09" (3/3) ... [2021-11-13 18:11:09,921 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_x25.ko-entry_point.cil.out.i [2021-11-13 18:11:09,951 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:11:09,951 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:11:10,011 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:11:10,018 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 [2021-11-13 18:11:10,019 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:11:10,049 INFO L276 IsEmpty]: Start isEmpty. Operand has 237 states, 184 states have (on average 1.3804347826086956) internal successors, (254), 190 states have internal predecessors, (254), 35 states have call successors, (35), 17 states have call predecessors, (35), 16 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-11-13 18:11:10,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-13 18:11:10,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:10,066 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:10,066 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:10,071 INFO L85 PathProgramCache]: Analyzing trace with hash 898254007, now seen corresponding path program 1 times [2021-11-13 18:11:10,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:11:10,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878496058] [2021-11-13 18:11:10,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:10,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:11:10,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:10,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:11:10,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:10,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:10,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:11:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:11:10,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:11:10,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878496058] [2021-11-13 18:11:10,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878496058] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:11:10,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:11:10,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:11:10,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901574806] [2021-11-13 18:11:10,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:11:10,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:11:10,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:11:10,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:11:10,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:11:10,476 INFO L87 Difference]: Start difference. First operand has 237 states, 184 states have (on average 1.3804347826086956) internal successors, (254), 190 states have internal predecessors, (254), 35 states have call successors, (35), 17 states have call predecessors, (35), 16 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:11:11,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:11,233 INFO L93 Difference]: Finished difference Result 786 states and 1141 transitions. [2021-11-13 18:11:11,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:11:11,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2021-11-13 18:11:11,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:11,254 INFO L225 Difference]: With dead ends: 786 [2021-11-13 18:11:11,255 INFO L226 Difference]: Without dead ends: 540 [2021-11-13 18:11:11,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:11:11,266 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 753 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 469.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.72ms SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 560.90ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:11,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 701 Invalid, 485 Unknown, 0 Unchecked, 21.72ms Time], IncrementalHoareTripleChecker [254 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 560.90ms Time] [2021-11-13 18:11:11,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-13 18:11:11,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 432. [2021-11-13 18:11:11,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 341 states have (on average 1.3284457478005864) internal successors, (453), 343 states have internal predecessors, (453), 60 states have call successors, (60), 31 states have call predecessors, (60), 30 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2021-11-13 18:11:11,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 572 transitions. [2021-11-13 18:11:11,370 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 572 transitions. Word has length 33 [2021-11-13 18:11:11,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:11,371 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 572 transitions. [2021-11-13 18:11:11,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:11:11,372 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 572 transitions. [2021-11-13 18:11:11,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-13 18:11:11,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:11,375 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:11,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:11:11,376 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:11,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:11,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1941540429, now seen corresponding path program 1 times [2021-11-13 18:11:11,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:11:11,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045359067] [2021-11-13 18:11:11,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:11,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:11:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:11,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:11:11,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:11,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:11,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:11:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:11:11,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:11:11,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045359067] [2021-11-13 18:11:11,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045359067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:11:11,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:11:11,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:11:11,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280799651] [2021-11-13 18:11:11,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:11:11,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:11:11,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:11:11,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:11:11,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:11:11,544 INFO L87 Difference]: Start difference. First operand 432 states and 572 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:11:12,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:12,112 INFO L93 Difference]: Finished difference Result 965 states and 1293 transitions. [2021-11-13 18:11:12,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:11:12,113 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-11-13 18:11:12,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:12,119 INFO L225 Difference]: With dead ends: 965 [2021-11-13 18:11:12,119 INFO L226 Difference]: Without dead ends: 539 [2021-11-13 18:11:12,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:11:12,123 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 613 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 386.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.34ms SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 461.50ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:12,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 753 Invalid, 374 Unknown, 0 Unchecked, 13.34ms Time], IncrementalHoareTripleChecker [175 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 461.50ms Time] [2021-11-13 18:11:12,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-11-13 18:11:12,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 431. [2021-11-13 18:11:12,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 340 states have (on average 1.3205882352941176) internal successors, (449), 342 states have internal predecessors, (449), 60 states have call successors, (60), 31 states have call predecessors, (60), 30 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2021-11-13 18:11:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 568 transitions. [2021-11-13 18:11:12,168 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 568 transitions. Word has length 36 [2021-11-13 18:11:12,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:12,168 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 568 transitions. [2021-11-13 18:11:12,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:11:12,169 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 568 transitions. [2021-11-13 18:11:12,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-13 18:11:12,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:12,174 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:12,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:11:12,174 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:12,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:12,175 INFO L85 PathProgramCache]: Analyzing trace with hash 2029658452, now seen corresponding path program 1 times [2021-11-13 18:11:12,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:11:12,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096360335] [2021-11-13 18:11:12,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:12,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:11:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:12,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:11:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:12,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:12,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:11:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:12,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-13 18:11:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:12,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:12,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:11:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:12,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:11:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:12,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:12,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:11:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 18:11:12,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:11:12,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096360335] [2021-11-13 18:11:12,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096360335] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:11:12,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:11:12,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:11:12,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305108238] [2021-11-13 18:11:12,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:11:12,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:11:12,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:11:12,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:11:12,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:11:12,523 INFO L87 Difference]: Start difference. First operand 431 states and 568 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:11:13,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:13,400 INFO L93 Difference]: Finished difference Result 1462 states and 2036 transitions. [2021-11-13 18:11:13,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:11:13,401 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2021-11-13 18:11:13,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:13,415 INFO L225 Difference]: With dead ends: 1462 [2021-11-13 18:11:13,415 INFO L226 Difference]: Without dead ends: 1032 [2021-11-13 18:11:13,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:11:13,427 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 514 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 569.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.61ms SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 720.30ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:13,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 1329 Invalid, 706 Unknown, 0 Unchecked, 18.61ms Time], IncrementalHoareTripleChecker [174 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 720.30ms Time] [2021-11-13 18:11:13,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-11-13 18:11:13,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 840. [2021-11-13 18:11:13,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 661 states have (on average 1.3222390317700454) internal successors, (874), 665 states have internal predecessors, (874), 118 states have call successors, (118), 61 states have call predecessors, (118), 60 states have return successors, (145), 117 states have call predecessors, (145), 117 states have call successors, (145) [2021-11-13 18:11:13,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1137 transitions. [2021-11-13 18:11:13,539 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1137 transitions. Word has length 77 [2021-11-13 18:11:13,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:13,540 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 1137 transitions. [2021-11-13 18:11:13,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:11:13,541 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1137 transitions. [2021-11-13 18:11:13,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-13 18:11:13,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:13,549 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:13,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:11:13,550 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:13,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:13,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1596249494, now seen corresponding path program 1 times [2021-11-13 18:11:13,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:11:13,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551995620] [2021-11-13 18:11:13,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:13,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:11:13,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:13,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:11:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:13,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:13,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:11:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:13,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-13 18:11:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:13,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:13,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:11:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:13,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:11:13,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:13,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:13,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:11:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:13,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 18:11:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:13,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:13,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:11:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:13,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:11:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:13,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-13 18:11:13,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:11:13,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551995620] [2021-11-13 18:11:13,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551995620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:11:13,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:11:13,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:11:13,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446085916] [2021-11-13 18:11:13,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:11:13,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:11:13,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:11:13,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:11:13,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:11:13,948 INFO L87 Difference]: Start difference. First operand 840 states and 1137 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (11), 6 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:11:15,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:15,077 INFO L93 Difference]: Finished difference Result 2912 states and 3997 transitions. [2021-11-13 18:11:15,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:11:15,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (11), 6 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 119 [2021-11-13 18:11:15,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:15,093 INFO L225 Difference]: With dead ends: 2912 [2021-11-13 18:11:15,093 INFO L226 Difference]: Without dead ends: 2078 [2021-11-13 18:11:15,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:11:15,099 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 578 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 780.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.20ms SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 913.05ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:15,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 1168 Invalid, 767 Unknown, 0 Unchecked, 13.20ms Time], IncrementalHoareTripleChecker [189 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 913.05ms Time] [2021-11-13 18:11:15,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-11-13 18:11:15,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1662. [2021-11-13 18:11:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1311 states have (on average 1.297482837528604) internal successors, (1701), 1319 states have internal predecessors, (1701), 210 states have call successors, (210), 121 states have call predecessors, (210), 140 states have return successors, (297), 229 states have call predecessors, (297), 209 states have call successors, (297) [2021-11-13 18:11:15,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 2208 transitions. [2021-11-13 18:11:15,294 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 2208 transitions. Word has length 119 [2021-11-13 18:11:15,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:15,298 INFO L470 AbstractCegarLoop]: Abstraction has 1662 states and 2208 transitions. [2021-11-13 18:11:15,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (11), 6 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:11:15,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 2208 transitions. [2021-11-13 18:11:15,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-13 18:11:15,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:15,312 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:15,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:11:15,313 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:15,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:15,313 INFO L85 PathProgramCache]: Analyzing trace with hash 162596766, now seen corresponding path program 1 times [2021-11-13 18:11:15,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:11:15,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18158720] [2021-11-13 18:11:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:15,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:11:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:15,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:11:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:15,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:15,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:11:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:15,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-13 18:11:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:15,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:15,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:11:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:15,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:11:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:15,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:15,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:11:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:15,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-13 18:11:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:15,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:15,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:11:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:15,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:11:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:15,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-13 18:11:15,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:11:15,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18158720] [2021-11-13 18:11:15,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18158720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:11:15,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:11:15,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:11:15,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917996336] [2021-11-13 18:11:15,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:11:15,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:11:15,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:11:15,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:11:15,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:11:15,603 INFO L87 Difference]: Start difference. First operand 1662 states and 2208 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-13 18:11:16,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:16,232 INFO L93 Difference]: Finished difference Result 2954 states and 4105 transitions. [2021-11-13 18:11:16,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:11:16,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 119 [2021-11-13 18:11:16,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:16,248 INFO L225 Difference]: With dead ends: 2954 [2021-11-13 18:11:16,248 INFO L226 Difference]: Without dead ends: 2070 [2021-11-13 18:11:16,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:11:16,254 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 163 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 391.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.36ms SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 469.24ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:16,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 1027 Invalid, 436 Unknown, 0 Unchecked, 8.36ms Time], IncrementalHoareTripleChecker [63 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 469.24ms Time] [2021-11-13 18:11:16,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-11-13 18:11:16,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1670. [2021-11-13 18:11:16,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1319 states have (on average 1.2956785443517818) internal successors, (1709), 1327 states have internal predecessors, (1709), 210 states have call successors, (210), 121 states have call predecessors, (210), 140 states have return successors, (297), 229 states have call predecessors, (297), 209 states have call successors, (297) [2021-11-13 18:11:16,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2216 transitions. [2021-11-13 18:11:16,414 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2216 transitions. Word has length 119 [2021-11-13 18:11:16,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:16,414 INFO L470 AbstractCegarLoop]: Abstraction has 1670 states and 2216 transitions. [2021-11-13 18:11:16,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-13 18:11:16,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2216 transitions. [2021-11-13 18:11:16,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-13 18:11:16,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:16,422 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:16,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:11:16,422 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:16,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:16,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1319541292, now seen corresponding path program 1 times [2021-11-13 18:11:16,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:11:16,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181125104] [2021-11-13 18:11:16,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:16,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:11:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:16,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:11:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:16,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:16,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:11:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:16,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-13 18:11:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:16,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:16,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:11:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:16,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:11:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:16,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:16,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:11:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:16,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-13 18:11:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:16,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:16,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:11:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:16,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:11:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:16,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:11:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:16,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:16,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-13 18:11:16,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:11:16,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181125104] [2021-11-13 18:11:16,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181125104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:11:16,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:11:16,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-13 18:11:16,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411614215] [2021-11-13 18:11:16,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:11:16,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:11:16,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:11:16,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:11:16,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:11:16,747 INFO L87 Difference]: Start difference. First operand 1670 states and 2216 transitions. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 8 states have internal predecessors, (71), 4 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 18:11:18,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:18,621 INFO L93 Difference]: Finished difference Result 4250 states and 5733 transitions. [2021-11-13 18:11:18,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 18:11:18,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 8 states have internal predecessors, (71), 4 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) Word has length 127 [2021-11-13 18:11:18,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:18,643 INFO L225 Difference]: With dead ends: 4250 [2021-11-13 18:11:18,643 INFO L226 Difference]: Without dead ends: 2586 [2021-11-13 18:11:18,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-11-13 18:11:18,652 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 1406 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 1450 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1188.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1423 SdHoareTripleChecker+Valid, 1668 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.99ms SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 1450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1411.35ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:18,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1423 Valid, 1668 Invalid, 2074 Unknown, 0 Unchecked, 24.99ms Time], IncrementalHoareTripleChecker [624 Valid, 1450 Invalid, 0 Unknown, 0 Unchecked, 1411.35ms Time] [2021-11-13 18:11:18,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-11-13 18:11:18,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 1698. [2021-11-13 18:11:18,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1335 states have (on average 1.2831460674157302) internal successors, (1713), 1347 states have internal predecessors, (1713), 222 states have call successors, (222), 125 states have call predecessors, (222), 140 states have return successors, (257), 233 states have call predecessors, (257), 221 states have call successors, (257) [2021-11-13 18:11:18,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 2192 transitions. [2021-11-13 18:11:18,817 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 2192 transitions. Word has length 127 [2021-11-13 18:11:18,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:18,819 INFO L470 AbstractCegarLoop]: Abstraction has 1698 states and 2192 transitions. [2021-11-13 18:11:18,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 8 states have internal predecessors, (71), 4 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 18:11:18,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 2192 transitions. [2021-11-13 18:11:18,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-13 18:11:18,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:18,826 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:18,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:11:18,826 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:18,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:18,827 INFO L85 PathProgramCache]: Analyzing trace with hash -239915446, now seen corresponding path program 1 times [2021-11-13 18:11:18,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:11:18,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478144264] [2021-11-13 18:11:18,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:18,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:11:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:18,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:11:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:18,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:18,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:11:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:18,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-13 18:11:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:19,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:19,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:11:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:19,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:11:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:19,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:19,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:11:19,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:19,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-13 18:11:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:19,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:19,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:11:19,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:19,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:11:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:19,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:19,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:19,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:19,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:11:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:19,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-13 18:11:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:19,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-13 18:11:19,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:11:19,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478144264] [2021-11-13 18:11:19,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478144264] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:11:19,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:11:19,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-13 18:11:19,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260564951] [2021-11-13 18:11:19,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:11:19,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:11:19,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:11:19,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:11:19,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:11:19,291 INFO L87 Difference]: Start difference. First operand 1698 states and 2192 transitions. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 9 states have internal predecessors, (78), 5 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (13), 8 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-13 18:11:22,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:22,044 INFO L93 Difference]: Finished difference Result 4534 states and 6177 transitions. [2021-11-13 18:11:22,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-13 18:11:22,046 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 9 states have internal predecessors, (78), 5 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (13), 8 states have call predecessors, (13), 4 states have call successors, (13) Word has length 151 [2021-11-13 18:11:22,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:22,095 INFO L225 Difference]: With dead ends: 4534 [2021-11-13 18:11:22,095 INFO L226 Difference]: Without dead ends: 3606 [2021-11-13 18:11:22,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=272, Invalid=988, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:11:22,101 INFO L933 BasicCegarLoop]: 526 mSDtfsCounter, 2063 mSDsluCounter, 2065 mSDsCounter, 0 mSdLazyCounter, 2258 mSolverCounterSat, 1028 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1706.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2101 SdHoareTripleChecker+Valid, 2591 SdHoareTripleChecker+Invalid, 3286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.23ms SdHoareTripleChecker+Time, 1028 IncrementalHoareTripleChecker+Valid, 2258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2091.36ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:22,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2101 Valid, 2591 Invalid, 3286 Unknown, 0 Unchecked, 32.23ms Time], IncrementalHoareTripleChecker [1028 Valid, 2258 Invalid, 0 Unknown, 0 Unchecked, 2091.36ms Time] [2021-11-13 18:11:22,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2021-11-13 18:11:22,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 2234. [2021-11-13 18:11:22,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 1731 states have (on average 1.2576545349508954) internal successors, (2177), 1755 states have internal predecessors, (2177), 266 states have call successors, (266), 153 states have call predecessors, (266), 236 states have return successors, (429), 333 states have call predecessors, (429), 265 states have call successors, (429) [2021-11-13 18:11:22,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 2872 transitions. [2021-11-13 18:11:22,314 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 2872 transitions. Word has length 151 [2021-11-13 18:11:22,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:22,315 INFO L470 AbstractCegarLoop]: Abstraction has 2234 states and 2872 transitions. [2021-11-13 18:11:22,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 9 states have internal predecessors, (78), 5 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (13), 8 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-13 18:11:22,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 2872 transitions. [2021-11-13 18:11:22,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-13 18:11:22,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:22,323 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:22,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:11:22,323 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:22,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:22,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1665675225, now seen corresponding path program 1 times [2021-11-13 18:11:22,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:11:22,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019507211] [2021-11-13 18:11:22,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:22,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:11:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:22,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:11:22,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:22,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:22,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:11:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:22,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-13 18:11:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:22,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:22,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:11:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:22,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:11:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:22,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:22,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:11:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:22,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-13 18:11:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:22,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:22,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:11:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:22,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:11:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:22,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:22,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:22,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:22,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:11:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:22,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:11:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:22,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-13 18:11:22,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:11:22,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019507211] [2021-11-13 18:11:22,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019507211] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:11:22,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:11:22,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:11:22,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927496164] [2021-11-13 18:11:22,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:11:22,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:11:22,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:11:22,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:11:22,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:11:22,577 INFO L87 Difference]: Start difference. First operand 2234 states and 2872 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-13 18:11:23,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:23,275 INFO L93 Difference]: Finished difference Result 4214 states and 5577 transitions. [2021-11-13 18:11:23,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:11:23,276 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 152 [2021-11-13 18:11:23,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:23,301 INFO L225 Difference]: With dead ends: 4214 [2021-11-13 18:11:23,301 INFO L226 Difference]: Without dead ends: 2818 [2021-11-13 18:11:23,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:11:23,309 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 282 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 386.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.07ms SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 458.02ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:23,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 1101 Invalid, 489 Unknown, 0 Unchecked, 9.07ms Time], IncrementalHoareTripleChecker [119 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 458.02ms Time] [2021-11-13 18:11:23,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2021-11-13 18:11:23,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 2234. [2021-11-13 18:11:23,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 1731 states have (on average 1.2484113229347198) internal successors, (2161), 1755 states have internal predecessors, (2161), 266 states have call successors, (266), 153 states have call predecessors, (266), 236 states have return successors, (429), 333 states have call predecessors, (429), 265 states have call successors, (429) [2021-11-13 18:11:23,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 2856 transitions. [2021-11-13 18:11:23,474 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 2856 transitions. Word has length 152 [2021-11-13 18:11:23,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:23,475 INFO L470 AbstractCegarLoop]: Abstraction has 2234 states and 2856 transitions. [2021-11-13 18:11:23,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-13 18:11:23,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 2856 transitions. [2021-11-13 18:11:23,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-13 18:11:23,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:23,482 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:23,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:11:23,483 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:23,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:23,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1648213824, now seen corresponding path program 1 times [2021-11-13 18:11:23,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:11:23,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581021879] [2021-11-13 18:11:23,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:23,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:11:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:11:23,620 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:11:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:11:23,876 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:11:23,876 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 18:11:23,877 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 18:11:23,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:11:23,883 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:23,887 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:11:23,964 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getProgramExecutionAsString(CounterExampleResult.java:155) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getLongDescription(CounterExampleResult.java:134) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) 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) [2021-11-13 18:11:23,968 INFO L158 Benchmark]: Toolchain (without parser) took 17318.84ms. Allocated memory was 109.1MB in the beginning and 323.0MB in the end (delta: 213.9MB). Free memory was 69.6MB in the beginning and 110.8MB in the end (delta: -41.2MB). Peak memory consumption was 171.9MB. Max. memory is 16.1GB. [2021-11-13 18:11:23,968 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 109.1MB. Free memory is still 62.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:11:23,968 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1655.04ms. Allocated memory was 109.1MB in the beginning and 148.9MB in the end (delta: 39.8MB). Free memory was 69.4MB in the beginning and 80.9MB in the end (delta: -11.6MB). Peak memory consumption was 35.8MB. Max. memory is 16.1GB. [2021-11-13 18:11:23,969 INFO L158 Benchmark]: Boogie Procedure Inliner took 125.42ms. Allocated memory is still 148.9MB. Free memory was 80.9MB in the beginning and 76.0MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-13 18:11:23,969 INFO L158 Benchmark]: Boogie Preprocessor took 128.35ms. Allocated memory is still 148.9MB. Free memory was 76.0MB in the beginning and 71.1MB in the end (delta: 4.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-13 18:11:23,970 INFO L158 Benchmark]: RCFGBuilder took 1347.46ms. Allocated memory is still 148.9MB. Free memory was 71.1MB in the beginning and 61.8MB in the end (delta: 9.3MB). Peak memory consumption was 17.0MB. Max. memory is 16.1GB. [2021-11-13 18:11:23,970 INFO L158 Benchmark]: TraceAbstraction took 14055.01ms. Allocated memory was 148.9MB in the beginning and 323.0MB in the end (delta: 174.1MB). Free memory was 61.1MB in the beginning and 110.8MB in the end (delta: -49.7MB). Peak memory consumption was 125.4MB. Max. memory is 16.1GB. [2021-11-13 18:11:23,973 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 109.1MB. Free memory is still 62.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1655.04ms. Allocated memory was 109.1MB in the beginning and 148.9MB in the end (delta: 39.8MB). Free memory was 69.4MB in the beginning and 80.9MB in the end (delta: -11.6MB). Peak memory consumption was 35.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 125.42ms. Allocated memory is still 148.9MB. Free memory was 80.9MB in the beginning and 76.0MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 128.35ms. Allocated memory is still 148.9MB. Free memory was 76.0MB in the beginning and 71.1MB in the end (delta: 4.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 1347.46ms. Allocated memory is still 148.9MB. Free memory was 71.1MB in the beginning and 61.8MB in the end (delta: 9.3MB). Peak memory consumption was 17.0MB. Max. memory is 16.1GB. * TraceAbstraction took 14055.01ms. Allocated memory was 148.9MB in the beginning and 323.0MB in the end (delta: 174.1MB). Free memory was 61.1MB in the beginning and 110.8MB in the end (delta: -49.7MB). Peak memory consumption was 125.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 18:11:24,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 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_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_x25.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y --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 9ca2eb28b930065096f039703bc8c545a25de7919cc90a3441476b4fab43b08c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:11:26,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:11:26,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:11:26,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:11:26,612 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:11:26,614 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:11:26,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:11:26,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:11:26,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:11:26,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:11:26,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:11:26,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:11:26,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:11:26,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:11:26,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:11:26,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:11:26,634 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:11:26,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:11:26,639 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:11:26,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:11:26,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:11:26,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:11:26,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:11:26,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:11:26,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:11:26,677 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:11:26,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:11:26,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:11:26,681 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:11:26,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:11:26,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:11:26,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:11:26,695 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:11:26,696 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:11:26,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:11:26,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:11:26,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:11:26,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:11:26,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:11:26,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:11:26,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:11:26,709 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-11-13 18:11:26,759 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:11:26,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:11:26,760 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:11:26,760 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:11:26,761 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:11:26,762 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:11:26,763 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:11:26,764 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:11:26,764 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:11:26,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:11:26,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:11:26,766 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:11:26,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:11:26,766 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:11:26,766 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 18:11:26,767 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 18:11:26,767 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:11:26,767 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:11:26,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:11:26,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:11:26,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:11:26,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:11:26,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:11:26,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:11:26,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:11:26,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:11:26,770 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-13 18:11:26,770 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 18:11:26,770 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:11:26,771 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:11:26,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:11:26,771 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:11:26,772 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 18:11:26,772 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_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ca2eb28b930065096f039703bc8c545a25de7919cc90a3441476b4fab43b08c [2021-11-13 18:11:27,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:11:27,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:11:27,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:11:27,235 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:11:27,238 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:11:27,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_x25.ko-entry_point.cil.out.i [2021-11-13 18:11:27,330 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/data/8874a4355/77c7b61fd7d54ea4bb18ba78b76d2313/FLAGdad9d3f17 [2021-11-13 18:11:28,286 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:11:28,288 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_x25.ko-entry_point.cil.out.i [2021-11-13 18:11:28,329 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/data/8874a4355/77c7b61fd7d54ea4bb18ba78b76d2313/FLAGdad9d3f17 [2021-11-13 18:11:28,728 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/data/8874a4355/77c7b61fd7d54ea4bb18ba78b76d2313 [2021-11-13 18:11:28,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:11:28,732 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:11:28,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:11:28,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:11:28,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:11:28,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:11:28" (1/1) ... [2021-11-13 18:11:28,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6be32e39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:28, skipping insertion in model container [2021-11-13 18:11:28,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:11:28" (1/1) ... [2021-11-13 18:11:28,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:11:28,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:11:29,629 WARN L228 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_433cfdac-8e86-4612-aa5e-ecef35f945f7/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_x25.ko-entry_point.cil.out.i[152690,152703] [2021-11-13 18:11:30,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:11:30,042 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:11:30,248 WARN L228 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_433cfdac-8e86-4612-aa5e-ecef35f945f7/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_x25.ko-entry_point.cil.out.i[152690,152703] [2021-11-13 18:11:30,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:11:30,409 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:11:30,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:30 WrapperNode [2021-11-13 18:11:30,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:11:30,411 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:11:30,411 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:11:30,412 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:11:30,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:30" (1/1) ... [2021-11-13 18:11:30,477 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:30" (1/1) ... [2021-11-13 18:11:30,552 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:11:30,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:11:30,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:11:30,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:11:30,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:30" (1/1) ... [2021-11-13 18:11:30,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:30" (1/1) ... [2021-11-13 18:11:30,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:30" (1/1) ... [2021-11-13 18:11:30,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:30" (1/1) ... [2021-11-13 18:11:30,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:30" (1/1) ... [2021-11-13 18:11:30,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:30" (1/1) ... [2021-11-13 18:11:30,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:30" (1/1) ... [2021-11-13 18:11:30,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:11:30,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:11:30,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:11:30,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:11:30,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:30" (1/1) ... [2021-11-13 18:11:30,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:11:30,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:11:30,776 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:11:30,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:11:30,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 18:11:30,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 18:11:30,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 18:11:30,827 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 18:11:30,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 18:11:30,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-13 18:11:30,827 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-13 18:11:30,827 INFO L130 BoogieDeclarations]: Found specification of procedure dev_to_hdlc [2021-11-13 18:11:30,827 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_to_hdlc [2021-11-13 18:11:30,829 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2021-11-13 18:11:30,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2021-11-13 18:11:30,830 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 18:11:30,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 18:11:30,830 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-11-13 18:11:30,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-11-13 18:11:30,831 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 18:11:30,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 18:11:30,831 INFO L130 BoogieDeclarations]: Found specification of procedure x25_ioctl [2021-11-13 18:11:30,831 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_ioctl [2021-11-13 18:11:30,831 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-13 18:11:30,831 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-13 18:11:30,832 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 18:11:30,832 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 18:11:30,832 INFO L130 BoogieDeclarations]: Found specification of procedure x25_connect_disconnect [2021-11-13 18:11:30,832 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_connect_disconnect [2021-11-13 18:11:30,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:11:30,832 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2021-11-13 18:11:30,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2021-11-13 18:11:30,833 INFO L130 BoogieDeclarations]: Found specification of procedure x25_type_trans [2021-11-13 18:11:30,833 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_type_trans [2021-11-13 18:11:30,833 INFO L130 BoogieDeclarations]: Found specification of procedure x25_xmit [2021-11-13 18:11:30,833 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_xmit [2021-11-13 18:11:30,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:11:30,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:11:30,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:11:30,834 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-11-13 18:11:30,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-11-13 18:11:30,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 18:11:30,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 18:11:30,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-13 18:11:30,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 18:11:30,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:11:30,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 18:11:30,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 18:11:30,836 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_successful_zalloc [2021-11-13 18:11:30,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_successful_zalloc [2021-11-13 18:11:30,836 INFO L130 BoogieDeclarations]: Found specification of procedure x25_rx [2021-11-13 18:11:30,836 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_rx [2021-11-13 18:11:30,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:11:30,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:11:31,790 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 18:11:32,529 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:11:32,529 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 18:11:32,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:11:32 BoogieIcfgContainer [2021-11-13 18:11:32,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:11:32,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:11:32,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:11:32,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:11:32,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:11:28" (1/3) ... [2021-11-13 18:11:32,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52bf2c4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:11:32, skipping insertion in model container [2021-11-13 18:11:32,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:30" (2/3) ... [2021-11-13 18:11:32,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52bf2c4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:11:32, skipping insertion in model container [2021-11-13 18:11:32,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:11:32" (3/3) ... [2021-11-13 18:11:32,544 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_x25.ko-entry_point.cil.out.i [2021-11-13 18:11:32,551 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:11:32,552 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:11:32,615 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:11:32,622 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 [2021-11-13 18:11:32,623 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:11:32,648 INFO L276 IsEmpty]: Start isEmpty. Operand has 237 states, 184 states have (on average 1.3804347826086956) internal successors, (254), 190 states have internal predecessors, (254), 35 states have call successors, (35), 17 states have call predecessors, (35), 16 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-11-13 18:11:32,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-13 18:11:32,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:32,657 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:32,658 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:32,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:32,664 INFO L85 PathProgramCache]: Analyzing trace with hash 898254007, now seen corresponding path program 1 times [2021-11-13 18:11:32,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:11:32,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659003736] [2021-11-13 18:11:32,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:32,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:11:32,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:11:32,684 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:11:32,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 18:11:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:32,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:11:32,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:11:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:11:33,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:11:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:11:33,256 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:11:33,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659003736] [2021-11-13 18:11:33,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659003736] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:11:33,257 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:11:33,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:11:33,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587360375] [2021-11-13 18:11:33,261 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:11:33,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:11:33,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:11:33,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:11:33,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:11:33,317 INFO L87 Difference]: Start difference. First operand has 237 states, 184 states have (on average 1.3804347826086956) internal successors, (254), 190 states have internal predecessors, (254), 35 states have call successors, (35), 17 states have call predecessors, (35), 16 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:11:33,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:33,863 INFO L93 Difference]: Finished difference Result 886 states and 1279 transitions. [2021-11-13 18:11:33,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:11:33,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2021-11-13 18:11:33,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:33,892 INFO L225 Difference]: With dead ends: 886 [2021-11-13 18:11:33,892 INFO L226 Difference]: Without dead ends: 636 [2021-11-13 18:11:33,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:11:33,905 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 562 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 253.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.40ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 312.65ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:33,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 1156 Invalid, 93 Unknown, 0 Unchecked, 25.40ms Time], IncrementalHoareTripleChecker [8 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 312.65ms Time] [2021-11-13 18:11:33,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-11-13 18:11:34,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 636. [2021-11-13 18:11:34,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 502 states have (on average 1.3326693227091633) internal successors, (669), 505 states have internal predecessors, (669), 88 states have call successors, (88), 46 states have call predecessors, (88), 45 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2021-11-13 18:11:34,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 844 transitions. [2021-11-13 18:11:34,022 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 844 transitions. Word has length 33 [2021-11-13 18:11:34,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:34,023 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 844 transitions. [2021-11-13 18:11:34,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:11:34,023 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 844 transitions. [2021-11-13 18:11:34,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-13 18:11:34,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:34,027 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:34,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:11:34,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:11:34,241 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:34,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:34,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1941540429, now seen corresponding path program 1 times [2021-11-13 18:11:34,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:11:34,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15588476] [2021-11-13 18:11:34,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:34,244 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:11:34,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:11:34,245 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:11:34,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 18:11:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:34,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:11:34,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:11:34,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:11:34,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:11:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:11:34,652 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:11:34,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15588476] [2021-11-13 18:11:34,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15588476] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:11:34,653 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:11:34,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-13 18:11:34,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101175366] [2021-11-13 18:11:34,653 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:11:34,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:11:34,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:11:34,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:11:34,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:11:34,657 INFO L87 Difference]: Start difference. First operand 636 states and 844 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:11:34,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:34,851 INFO L93 Difference]: Finished difference Result 1265 states and 1679 transitions. [2021-11-13 18:11:34,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:11:34,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-11-13 18:11:34,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:34,860 INFO L225 Difference]: With dead ends: 1265 [2021-11-13 18:11:34,860 INFO L226 Difference]: Without dead ends: 635 [2021-11-13 18:11:34,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:11:34,866 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 371 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.00ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.99ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:34,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 645 Invalid, 27 Unknown, 0 Unchecked, 9.00ms Time], IncrementalHoareTripleChecker [14 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 72.99ms Time] [2021-11-13 18:11:34,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-13 18:11:34,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-13 18:11:34,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 501 states have (on average 1.3273453093812375) internal successors, (665), 504 states have internal predecessors, (665), 88 states have call successors, (88), 46 states have call predecessors, (88), 45 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2021-11-13 18:11:34,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 840 transitions. [2021-11-13 18:11:34,954 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 840 transitions. Word has length 36 [2021-11-13 18:11:34,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:34,954 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 840 transitions. [2021-11-13 18:11:34,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:11:34,955 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 840 transitions. [2021-11-13 18:11:34,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-13 18:11:34,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:34,962 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:34,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:11:35,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:11:35,171 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:35,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:35,172 INFO L85 PathProgramCache]: Analyzing trace with hash 2029658452, now seen corresponding path program 1 times [2021-11-13 18:11:35,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:11:35,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810530667] [2021-11-13 18:11:35,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:35,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:11:35,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:11:35,181 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:11:35,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 18:11:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:35,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:11:35,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:11:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 18:11:35,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:11:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 18:11:35,925 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:11:35,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810530667] [2021-11-13 18:11:35,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810530667] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:11:35,926 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:11:35,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-13 18:11:35,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58543201] [2021-11-13 18:11:35,927 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:11:35,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:11:35,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:11:35,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:11:35,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:11:35,929 INFO L87 Difference]: Start difference. First operand 635 states and 840 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 18:11:36,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:36,133 INFO L93 Difference]: Finished difference Result 1890 states and 2561 transitions. [2021-11-13 18:11:36,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:11:36,134 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 77 [2021-11-13 18:11:36,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:36,146 INFO L225 Difference]: With dead ends: 1890 [2021-11-13 18:11:36,146 INFO L226 Difference]: Without dead ends: 1256 [2021-11-13 18:11:36,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:11:36,151 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 255 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 1573 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.63ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 94.04ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:36,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 1573 Invalid, 54 Unknown, 0 Unchecked, 7.63ms Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 94.04ms Time] [2021-11-13 18:11:36,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-11-13 18:11:36,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1244. [2021-11-13 18:11:36,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 979 states have (on average 1.3278855975485189) internal successors, (1300), 985 states have internal predecessors, (1300), 174 states have call successors, (174), 91 states have call predecessors, (174), 90 states have return successors, (215), 173 states have call predecessors, (215), 173 states have call successors, (215) [2021-11-13 18:11:36,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1689 transitions. [2021-11-13 18:11:36,249 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1689 transitions. Word has length 77 [2021-11-13 18:11:36,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:36,250 INFO L470 AbstractCegarLoop]: Abstraction has 1244 states and 1689 transitions. [2021-11-13 18:11:36,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 18:11:36,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1689 transitions. [2021-11-13 18:11:36,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-13 18:11:36,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:36,259 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:36,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-13 18:11:36,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:11:36,481 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:36,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:36,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1596249494, now seen corresponding path program 1 times [2021-11-13 18:11:36,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:11:36,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933176692] [2021-11-13 18:11:36,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:36,483 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:11:36,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:11:36,485 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:11:36,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 18:11:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:36,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:11:36,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:11:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 18:11:37,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:11:37,305 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-13 18:11:37,305 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:11:37,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933176692] [2021-11-13 18:11:37,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933176692] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:11:37,309 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:11:37,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:11:37,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145797075] [2021-11-13 18:11:37,310 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:11:37,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:11:37,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:11:37,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:11:37,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:11:37,317 INFO L87 Difference]: Start difference. First operand 1244 states and 1689 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-13 18:11:37,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:37,665 INFO L93 Difference]: Finished difference Result 3600 states and 4869 transitions. [2021-11-13 18:11:37,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:11:37,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 119 [2021-11-13 18:11:37,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:37,683 INFO L225 Difference]: With dead ends: 3600 [2021-11-13 18:11:37,683 INFO L226 Difference]: Without dead ends: 2362 [2021-11-13 18:11:37,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:11:37,690 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 237 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 181.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.35ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 206.97ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:37,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 612 Invalid, 45 Unknown, 0 Unchecked, 3.35ms Time], IncrementalHoareTripleChecker [16 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 206.97ms Time] [2021-11-13 18:11:37,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2021-11-13 18:11:37,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2346. [2021-11-13 18:11:37,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 1859 states have (on average 1.3098440021516944) internal successors, (2435), 1871 states have internal predecessors, (2435), 306 states have call successors, (306), 181 states have call predecessors, (306), 180 states have return successors, (377), 305 states have call predecessors, (377), 305 states have call successors, (377) [2021-11-13 18:11:37,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 3118 transitions. [2021-11-13 18:11:37,884 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 3118 transitions. Word has length 119 [2021-11-13 18:11:37,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:37,885 INFO L470 AbstractCegarLoop]: Abstraction has 2346 states and 3118 transitions. [2021-11-13 18:11:37,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-13 18:11:37,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 3118 transitions. [2021-11-13 18:11:37,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-13 18:11:37,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:37,895 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:37,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:11:38,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:11:38,111 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:38,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:38,111 INFO L85 PathProgramCache]: Analyzing trace with hash 162596766, now seen corresponding path program 1 times [2021-11-13 18:11:38,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:11:38,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737115436] [2021-11-13 18:11:38,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:38,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:11:38,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:11:38,117 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:11:38,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 18:11:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:38,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:11:38,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:11:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-13 18:11:38,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:11:38,922 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-13 18:11:38,922 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:11:38,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737115436] [2021-11-13 18:11:38,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737115436] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:11:38,923 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:11:38,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:11:38,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610409570] [2021-11-13 18:11:38,923 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:11:38,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:11:38,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:11:38,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:11:38,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:11:38,925 INFO L87 Difference]: Start difference. First operand 2346 states and 3118 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-13 18:11:39,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:39,072 INFO L93 Difference]: Finished difference Result 3556 states and 4834 transitions. [2021-11-13 18:11:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:11:39,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 119 [2021-11-13 18:11:39,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:39,092 INFO L225 Difference]: With dead ends: 3556 [2021-11-13 18:11:39,092 INFO L226 Difference]: Without dead ends: 2370 [2021-11-13 18:11:39,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:11:39,099 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 5 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.70ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.90ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:39,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 586 Invalid, 4 Unknown, 0 Unchecked, 3.70ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 11.90ms Time] [2021-11-13 18:11:39,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2021-11-13 18:11:39,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 2370. [2021-11-13 18:11:39,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2370 states, 1877 states have (on average 1.3068726691529036) internal successors, (2453), 1895 states have internal predecessors, (2453), 306 states have call successors, (306), 181 states have call predecessors, (306), 186 states have return successors, (389), 305 states have call predecessors, (389), 305 states have call successors, (389) [2021-11-13 18:11:39,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2370 states to 2370 states and 3148 transitions. [2021-11-13 18:11:39,257 INFO L78 Accepts]: Start accepts. Automaton has 2370 states and 3148 transitions. Word has length 119 [2021-11-13 18:11:39,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:39,257 INFO L470 AbstractCegarLoop]: Abstraction has 2370 states and 3148 transitions. [2021-11-13 18:11:39,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-13 18:11:39,258 INFO L276 IsEmpty]: Start isEmpty. Operand 2370 states and 3148 transitions. [2021-11-13 18:11:39,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-13 18:11:39,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:39,270 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:39,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:11:39,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:11:39,475 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:39,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:39,476 INFO L85 PathProgramCache]: Analyzing trace with hash -680254401, now seen corresponding path program 1 times [2021-11-13 18:11:39,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:11:39,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644937009] [2021-11-13 18:11:39,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:39,477 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:11:39,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:11:39,478 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:11:39,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 18:11:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:39,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:11:39,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:11:40,189 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 18:11:40,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:11:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-13 18:11:40,808 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:11:40,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644937009] [2021-11-13 18:11:40,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644937009] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:11:40,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:11:40,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-13 18:11:40,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324145422] [2021-11-13 18:11:40,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:11:40,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:11:40,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:11:40,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:11:40,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:11:40,811 INFO L87 Difference]: Start difference. First operand 2370 states and 3148 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:11:42,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:42,276 INFO L93 Difference]: Finished difference Result 5166 states and 6937 transitions. [2021-11-13 18:11:42,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:11:42,277 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 121 [2021-11-13 18:11:42,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:42,296 INFO L225 Difference]: With dead ends: 5166 [2021-11-13 18:11:42,296 INFO L226 Difference]: Without dead ends: 2730 [2021-11-13 18:11:42,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:11:42,306 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 531 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 960.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.33ms SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1174.81ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:42,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 858 Invalid, 429 Unknown, 0 Unchecked, 9.33ms Time], IncrementalHoareTripleChecker [85 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 1174.81ms Time] [2021-11-13 18:11:42,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2730 states. [2021-11-13 18:11:42,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2730 to 2460. [2021-11-13 18:11:42,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 1937 states have (on average 1.2911719153329893) internal successors, (2501), 1949 states have internal predecessors, (2501), 324 states have call successors, (324), 181 states have call predecessors, (324), 198 states have return successors, (371), 341 states have call predecessors, (371), 323 states have call successors, (371) [2021-11-13 18:11:42,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 3196 transitions. [2021-11-13 18:11:42,514 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 3196 transitions. Word has length 121 [2021-11-13 18:11:42,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:42,515 INFO L470 AbstractCegarLoop]: Abstraction has 2460 states and 3196 transitions. [2021-11-13 18:11:42,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:11:42,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 3196 transitions. [2021-11-13 18:11:42,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-13 18:11:42,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:42,524 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:42,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:11:42,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:11:42,739 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:42,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:42,740 INFO L85 PathProgramCache]: Analyzing trace with hash -192064408, now seen corresponding path program 1 times [2021-11-13 18:11:42,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:11:42,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258884406] [2021-11-13 18:11:42,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:42,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:11:42,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:11:42,742 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:11:42,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 18:11:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:43,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 18:11:43,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:11:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-13 18:11:43,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:11:45,535 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-13 18:11:45,535 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:11:45,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258884406] [2021-11-13 18:11:45,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258884406] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:11:45,536 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:11:45,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 20 [2021-11-13 18:11:45,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696825426] [2021-11-13 18:11:45,536 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:11:45,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 18:11:45,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:11:45,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 18:11:45,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:11:45,538 INFO L87 Difference]: Start difference. First operand 2460 states and 3196 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 16 states have internal predecessors, (102), 6 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (21), 10 states have call predecessors, (21), 6 states have call successors, (21) [2021-11-13 18:11:46,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:46,169 INFO L93 Difference]: Finished difference Result 4914 states and 6469 transitions. [2021-11-13 18:11:46,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:11:46,170 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 16 states have internal predecessors, (102), 6 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (21), 10 states have call predecessors, (21), 6 states have call successors, (21) Word has length 150 [2021-11-13 18:11:46,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:46,206 INFO L225 Difference]: With dead ends: 4914 [2021-11-13 18:11:46,207 INFO L226 Difference]: Without dead ends: 2460 [2021-11-13 18:11:46,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-11-13 18:11:46,215 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 35 mSDsluCounter, 3964 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 269.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 4251 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.42ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 314.56ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:46,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 4251 Invalid, 123 Unknown, 0 Unchecked, 10.42ms Time], IncrementalHoareTripleChecker [7 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 314.56ms Time] [2021-11-13 18:11:46,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-11-13 18:11:46,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2460. [2021-11-13 18:11:46,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 1937 states have (on average 1.275684047496128) internal successors, (2471), 1949 states have internal predecessors, (2471), 324 states have call successors, (324), 181 states have call predecessors, (324), 198 states have return successors, (371), 341 states have call predecessors, (371), 323 states have call successors, (371) [2021-11-13 18:11:46,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 3166 transitions. [2021-11-13 18:11:46,358 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 3166 transitions. Word has length 150 [2021-11-13 18:11:46,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:46,358 INFO L470 AbstractCegarLoop]: Abstraction has 2460 states and 3166 transitions. [2021-11-13 18:11:46,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 16 states have internal predecessors, (102), 6 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (21), 10 states have call predecessors, (21), 6 states have call successors, (21) [2021-11-13 18:11:46,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 3166 transitions. [2021-11-13 18:11:46,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-13 18:11:46,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:46,367 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-13 18:11:46,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:11:46,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:11:46,582 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:46,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:46,583 INFO L85 PathProgramCache]: Analyzing trace with hash -335554040, now seen corresponding path program 1 times [2021-11-13 18:11:46,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:11:46,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159643673] [2021-11-13 18:11:46,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:46,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:11:46,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:11:46,586 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:11:46,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 18:11:46,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:46,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 18:11:46,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:11:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 35 proven. 50 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-13 18:11:47,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:11:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-13 18:11:48,923 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:11:48,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159643673] [2021-11-13 18:11:48,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159643673] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:11:48,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:11:48,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-13 18:11:48,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701638694] [2021-11-13 18:11:48,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:11:48,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 18:11:48,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:11:48,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 18:11:48,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:11:48,926 INFO L87 Difference]: Start difference. First operand 2460 states and 3166 transitions. Second operand has 15 states, 15 states have (on average 10.333333333333334) internal successors, (155), 15 states have internal predecessors, (155), 10 states have call successors, (30), 6 states have call predecessors, (30), 8 states have return successors, (29), 12 states have call predecessors, (29), 9 states have call successors, (29) [2021-11-13 18:11:54,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:54,234 INFO L93 Difference]: Finished difference Result 6458 states and 9007 transitions. [2021-11-13 18:11:54,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-13 18:11:54,235 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 10.333333333333334) internal successors, (155), 15 states have internal predecessors, (155), 10 states have call successors, (30), 6 states have call predecessors, (30), 8 states have return successors, (29), 12 states have call predecessors, (29), 9 states have call successors, (29) Word has length 171 [2021-11-13 18:11:54,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:54,272 INFO L225 Difference]: With dead ends: 6458 [2021-11-13 18:11:54,273 INFO L226 Difference]: Without dead ends: 5104 [2021-11-13 18:11:54,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2021-11-13 18:11:54,283 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 1519 mSDsluCounter, 2718 mSDsCounter, 0 mSdLazyCounter, 2201 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3965.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 3206 SdHoareTripleChecker+Invalid, 2738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.07ms SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 2201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4587.09ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:54,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1524 Valid, 3206 Invalid, 2738 Unknown, 0 Unchecked, 29.07ms Time], IncrementalHoareTripleChecker [537 Valid, 2201 Invalid, 0 Unknown, 0 Unchecked, 4587.09ms Time] [2021-11-13 18:11:54,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5104 states. [2021-11-13 18:11:54,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5104 to 3992. [2021-11-13 18:11:54,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3992 states, 3107 states have (on average 1.2552301255230125) internal successors, (3900), 3125 states have internal predecessors, (3900), 536 states have call successors, (536), 295 states have call predecessors, (536), 348 states have return successors, (787), 589 states have call predecessors, (787), 535 states have call successors, (787) [2021-11-13 18:11:54,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3992 states to 3992 states and 5223 transitions. [2021-11-13 18:11:54,620 INFO L78 Accepts]: Start accepts. Automaton has 3992 states and 5223 transitions. Word has length 171 [2021-11-13 18:11:54,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:54,621 INFO L470 AbstractCegarLoop]: Abstraction has 3992 states and 5223 transitions. [2021-11-13 18:11:54,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.333333333333334) internal successors, (155), 15 states have internal predecessors, (155), 10 states have call successors, (30), 6 states have call predecessors, (30), 8 states have return successors, (29), 12 states have call predecessors, (29), 9 states have call successors, (29) [2021-11-13 18:11:54,621 INFO L276 IsEmpty]: Start isEmpty. Operand 3992 states and 5223 transitions. [2021-11-13 18:11:54,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-13 18:11:54,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:54,632 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:54,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:11:54,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:11:54,847 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:54,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:54,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1092958942, now seen corresponding path program 1 times [2021-11-13 18:11:54,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:11:54,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102723884] [2021-11-13 18:11:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:54,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:11:54,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:11:54,851 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:11:54,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 18:11:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:55,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-13 18:11:55,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:11:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 28 proven. 46 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 18:11:55,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:11:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-13 18:11:56,985 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:11:56,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102723884] [2021-11-13 18:11:56,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102723884] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:11:56,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:11:56,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-11-13 18:11:56,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343367288] [2021-11-13 18:11:56,986 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:11:56,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:11:56,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:11:56,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:11:56,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:11:56,987 INFO L87 Difference]: Start difference. First operand 3992 states and 5223 transitions. Second operand has 14 states, 14 states have (on average 10.785714285714286) internal successors, (151), 14 states have internal predecessors, (151), 8 states have call successors, (32), 6 states have call predecessors, (32), 8 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-13 18:12:01,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:01,480 INFO L93 Difference]: Finished difference Result 12005 states and 16235 transitions. [2021-11-13 18:12:01,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-13 18:12:01,481 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.785714285714286) internal successors, (151), 14 states have internal predecessors, (151), 8 states have call successors, (32), 6 states have call predecessors, (32), 8 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) Word has length 176 [2021-11-13 18:12:01,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:01,554 INFO L225 Difference]: With dead ends: 12005 [2021-11-13 18:12:01,554 INFO L226 Difference]: Without dead ends: 9150 [2021-11-13 18:12:01,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2021-11-13 18:12:01,570 INFO L933 BasicCegarLoop]: 560 mSDtfsCounter, 1639 mSDsluCounter, 3146 mSDsCounter, 0 mSdLazyCounter, 1980 mSolverCounterSat, 669 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3255.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1651 SdHoareTripleChecker+Valid, 3706 SdHoareTripleChecker+Invalid, 2649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.29ms SdHoareTripleChecker+Time, 669 IncrementalHoareTripleChecker+Valid, 1980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3696.60ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:01,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1651 Valid, 3706 Invalid, 2649 Unknown, 0 Unchecked, 31.29ms Time], IncrementalHoareTripleChecker [669 Valid, 1980 Invalid, 0 Unknown, 0 Unchecked, 3696.60ms Time] [2021-11-13 18:12:01,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9150 states. [2021-11-13 18:12:02,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9150 to 7326. [2021-11-13 18:12:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7326 states, 5693 states have (on average 1.244335148427894) internal successors, (7084), 5699 states have internal predecessors, (7084), 930 states have call successors, (930), 511 states have call predecessors, (930), 702 states have return successors, (1571), 1145 states have call predecessors, (1571), 929 states have call successors, (1571) [2021-11-13 18:12:02,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7326 states to 7326 states and 9585 transitions. [2021-11-13 18:12:02,247 INFO L78 Accepts]: Start accepts. Automaton has 7326 states and 9585 transitions. Word has length 176 [2021-11-13 18:12:02,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:02,248 INFO L470 AbstractCegarLoop]: Abstraction has 7326 states and 9585 transitions. [2021-11-13 18:12:02,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.785714285714286) internal successors, (151), 14 states have internal predecessors, (151), 8 states have call successors, (32), 6 states have call predecessors, (32), 8 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-13 18:12:02,250 INFO L276 IsEmpty]: Start isEmpty. Operand 7326 states and 9585 transitions. [2021-11-13 18:12:02,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-13 18:12:02,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:02,269 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:02,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:12:02,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:12:02,483 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:02,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:02,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1339025954, now seen corresponding path program 1 times [2021-11-13 18:12:02,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:12:02,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491031146] [2021-11-13 18:12:02,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:02,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:12:02,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:12:02,487 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:12:02,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 18:12:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:02,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:12:02,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:12:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-13 18:12:03,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:12:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-13 18:12:03,693 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:12:03,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491031146] [2021-11-13 18:12:03,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491031146] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:12:03,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:12:03,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 18:12:03,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336135315] [2021-11-13 18:12:03,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:12:03,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:12:03,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:12:03,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:12:03,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:12:03,696 INFO L87 Difference]: Start difference. First operand 7326 states and 9585 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 18:12:04,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:04,149 INFO L93 Difference]: Finished difference Result 13726 states and 18362 transitions. [2021-11-13 18:12:04,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:12:04,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 176 [2021-11-13 18:12:04,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:04,195 INFO L225 Difference]: With dead ends: 13726 [2021-11-13 18:12:04,196 INFO L226 Difference]: Without dead ends: 7542 [2021-11-13 18:12:04,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:12:04,222 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 10 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 91.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.42ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 102.81ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:04,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 872 Invalid, 24 Unknown, 0 Unchecked, 1.42ms Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 102.81ms Time] [2021-11-13 18:12:04,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7542 states. [2021-11-13 18:12:04,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7542 to 7398. [2021-11-13 18:12:04,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7398 states, 5765 states have (on average 1.2454466608846488) internal successors, (7180), 5771 states have internal predecessors, (7180), 930 states have call successors, (930), 511 states have call predecessors, (930), 702 states have return successors, (1571), 1145 states have call predecessors, (1571), 929 states have call successors, (1571) [2021-11-13 18:12:04,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7398 states to 7398 states and 9681 transitions. [2021-11-13 18:12:04,715 INFO L78 Accepts]: Start accepts. Automaton has 7398 states and 9681 transitions. Word has length 176 [2021-11-13 18:12:04,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:04,716 INFO L470 AbstractCegarLoop]: Abstraction has 7398 states and 9681 transitions. [2021-11-13 18:12:04,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 18:12:04,716 INFO L276 IsEmpty]: Start isEmpty. Operand 7398 states and 9681 transitions. [2021-11-13 18:12:04,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-13 18:12:04,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:04,731 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:04,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:12:04,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:12:04,950 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:04,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:04,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1389203774, now seen corresponding path program 1 times [2021-11-13 18:12:04,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:12:04,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151548332] [2021-11-13 18:12:04,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:04,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:12:04,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:12:04,953 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:12:04,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 18:12:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:12:05,821 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:12:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:12:06,930 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-11-13 18:12:06,931 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 18:12:06,932 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 18:12:06,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:12:07,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:12:07,164 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:07,168 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:12:07,312 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getProgramExecutionAsString(CounterExampleResult.java:155) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getLongDescription(CounterExampleResult.java:134) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) 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) [2021-11-13 18:12:07,313 INFO L158 Benchmark]: Toolchain (without parser) took 38581.30ms. Allocated memory was 65.0MB in the beginning and 383.8MB in the end (delta: 318.8MB). Free memory was 37.0MB in the beginning and 248.0MB in the end (delta: -211.0MB). Peak memory consumption was 287.5MB. Max. memory is 16.1GB. [2021-11-13 18:12:07,314 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 65.0MB. Free memory was 44.9MB in the beginning and 44.8MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:12:07,314 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1676.30ms. Allocated memory was 65.0MB in the beginning and 83.9MB in the end (delta: 18.9MB). Free memory was 36.8MB in the beginning and 37.7MB in the end (delta: -869.6kB). Peak memory consumption was 33.9MB. Max. memory is 16.1GB. [2021-11-13 18:12:07,314 INFO L158 Benchmark]: Boogie Procedure Inliner took 152.28ms. Allocated memory is still 83.9MB. Free memory was 37.7MB in the beginning and 33.0MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-13 18:12:07,315 INFO L158 Benchmark]: Boogie Preprocessor took 154.75ms. Allocated memory is still 83.9MB. Free memory was 33.0MB in the beginning and 41.5MB in the end (delta: -8.5MB). Peak memory consumption was 11.1MB. Max. memory is 16.1GB. [2021-11-13 18:12:07,315 INFO L158 Benchmark]: RCFGBuilder took 1804.77ms. Allocated memory was 83.9MB in the beginning and 123.7MB in the end (delta: 39.8MB). Free memory was 41.5MB in the beginning and 83.8MB in the end (delta: -42.3MB). Peak memory consumption was 31.0MB. Max. memory is 16.1GB. [2021-11-13 18:12:07,315 INFO L158 Benchmark]: TraceAbstraction took 34779.32ms. Allocated memory was 123.7MB in the beginning and 383.8MB in the end (delta: 260.0MB). Free memory was 83.8MB in the beginning and 248.0MB in the end (delta: -164.2MB). Peak memory consumption was 276.1MB. Max. memory is 16.1GB. [2021-11-13 18:12:07,317 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 65.0MB. Free memory was 44.9MB in the beginning and 44.8MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1676.30ms. Allocated memory was 65.0MB in the beginning and 83.9MB in the end (delta: 18.9MB). Free memory was 36.8MB in the beginning and 37.7MB in the end (delta: -869.6kB). Peak memory consumption was 33.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 152.28ms. Allocated memory is still 83.9MB. Free memory was 37.7MB in the beginning and 33.0MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 154.75ms. Allocated memory is still 83.9MB. Free memory was 33.0MB in the beginning and 41.5MB in the end (delta: -8.5MB). Peak memory consumption was 11.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1804.77ms. Allocated memory was 83.9MB in the beginning and 123.7MB in the end (delta: 39.8MB). Free memory was 41.5MB in the beginning and 83.8MB in the end (delta: -42.3MB). Peak memory consumption was 31.0MB. Max. memory is 16.1GB. * TraceAbstraction took 34779.32ms. Allocated memory was 123.7MB in the beginning and 383.8MB in the end (delta: 260.0MB). Free memory was 83.8MB in the beginning and 248.0MB in the end (delta: -164.2MB). Peak memory consumption was 276.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 18:12:07,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_433cfdac-8e86-4612-aa5e-ecef35f945f7/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null