./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.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_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/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_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/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_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/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 07ae4eb392cc9822cbd398c1edf107cccc60d6668bc59dbf5a692a6b9350873b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:44:20,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:44:20,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:44:20,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:44:20,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:44:20,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:44:20,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:44:20,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:44:20,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:44:20,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:44:20,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:44:20,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:44:20,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:44:20,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:44:20,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:44:20,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:44:20,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:44:20,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:44:20,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:44:20,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:44:20,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:44:20,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:44:20,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:44:20,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:44:20,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:44:20,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:44:20,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:44:20,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:44:20,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:44:20,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:44:20,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:44:20,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:44:20,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:44:20,472 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:44:20,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:44:20,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:44:20,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:44:20,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:44:20,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:44:20,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:44:20,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:44:20,480 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-13 18:44:20,514 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:44:20,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:44:20,515 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:44:20,516 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:44:20,516 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:44:20,517 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:44:20,518 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:44:20,518 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:44:20,518 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:44:20,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:44:20,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:44:20,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:44:20,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:44:20,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:44:20,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:44:20,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:44:20,521 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:44:20,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:44:20,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:44:20,522 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:44:20,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:44:20,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:44:20,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:44:20,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:44:20,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:44:20,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:44:20,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:44:20,524 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:44:20,525 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:44:20,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:44:20,530 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:44:20,530 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_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07ae4eb392cc9822cbd398c1edf107cccc60d6668bc59dbf5a692a6b9350873b [2021-11-13 18:44:20,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:44:20,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:44:20,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:44:20,935 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:44:20,936 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:44:20,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-13 18:44:21,024 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/data/2e09b75e1/21cf7c4830e94cbcbc0d3237668599cd/FLAG3a7154e69 [2021-11-13 18:44:21,945 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:44:21,946 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-13 18:44:22,013 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/data/2e09b75e1/21cf7c4830e94cbcbc0d3237668599cd/FLAG3a7154e69 [2021-11-13 18:44:22,449 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/data/2e09b75e1/21cf7c4830e94cbcbc0d3237668599cd [2021-11-13 18:44:22,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:44:22,453 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:44:22,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:44:22,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:44:22,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:44:22,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:44:22" (1/1) ... [2021-11-13 18:44:22,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3850fd61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:22, skipping insertion in model container [2021-11-13 18:44:22,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:44:22" (1/1) ... [2021-11-13 18:44:22,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:44:22,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:44:23,659 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_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113497,113510] [2021-11-13 18:44:23,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:44:23,794 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:44:24,103 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_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113497,113510] [2021-11-13 18:44:24,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:44:24,184 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:44:24,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:24 WrapperNode [2021-11-13 18:44:24,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:44:24,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:44:24,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:44:24,191 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:44:24,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:24" (1/1) ... [2021-11-13 18:44:24,274 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:24" (1/1) ... [2021-11-13 18:44:24,340 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:44:24,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:44:24,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:44:24,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:44:24,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:24" (1/1) ... [2021-11-13 18:44:24,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:24" (1/1) ... [2021-11-13 18:44:24,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:24" (1/1) ... [2021-11-13 18:44:24,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:24" (1/1) ... [2021-11-13 18:44:24,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:24" (1/1) ... [2021-11-13 18:44:24,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:24" (1/1) ... [2021-11-13 18:44:24,415 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:24" (1/1) ... [2021-11-13 18:44:24,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:44:24,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:44:24,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:44:24,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:44:24,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:24" (1/1) ... [2021-11-13 18:44:24,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:44:24,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:44:24,494 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:44:24,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:44:24,555 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 18:44:24,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 18:44:24,557 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:44:24,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-13 18:44:24,557 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-13 18:44:24,558 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 18:44:24,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 18:44:24,558 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-13 18:44:24,558 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-13 18:44:24,558 INFO L130 BoogieDeclarations]: Found specification of procedure strlcat [2021-11-13 18:44:24,559 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcat [2021-11-13 18:44:24,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:44:24,559 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 18:44:24,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 18:44:24,559 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-13 18:44:24,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-13 18:44:24,560 INFO L130 BoogieDeclarations]: Found specification of procedure usb_acecad_disconnect [2021-11-13 18:44:24,560 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_acecad_disconnect [2021-11-13 18:44:24,560 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-13 18:44:24,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-13 18:44:24,561 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 18:44:24,561 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 18:44:24,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:44:24,562 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-13 18:44:24,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-13 18:44:24,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:44:24,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:44:24,562 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_abs_params [2021-11-13 18:44:24,563 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_abs_params [2021-11-13 18:44:24,563 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-13 18:44:24,563 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-13 18:44:24,563 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_7 [2021-11-13 18:44:24,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_7 [2021-11-13 18:44:24,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:44:24,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:44:24,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 18:44:24,564 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-13 18:44:24,564 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-13 18:44:24,565 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-13 18:44:24,565 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-13 18:44:24,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:44:24,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:44:24,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:44:25,106 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 18:44:26,064 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:44:26,064 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 18:44:26,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:44:26 BoogieIcfgContainer [2021-11-13 18:44:26,068 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:44:26,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:44:26,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:44:26,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:44:26,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:44:22" (1/3) ... [2021-11-13 18:44:26,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bc50391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:44:26, skipping insertion in model container [2021-11-13 18:44:26,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:24" (2/3) ... [2021-11-13 18:44:26,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bc50391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:44:26, skipping insertion in model container [2021-11-13 18:44:26,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:44:26" (3/3) ... [2021-11-13 18:44:26,079 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-13 18:44:26,086 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:44:26,087 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:44:26,173 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:44:26,184 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 18:44:26,185 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:44:26,235 INFO L276 IsEmpty]: Start isEmpty. Operand has 231 states, 171 states have (on average 1.3099415204678362) internal successors, (224), 183 states have internal predecessors, (224), 43 states have call successors, (43), 16 states have call predecessors, (43), 15 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-11-13 18:44:26,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-13 18:44:26,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:26,250 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] [2021-11-13 18:44:26,250 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:26,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:26,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1798989029, now seen corresponding path program 1 times [2021-11-13 18:44:26,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:26,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093154074] [2021-11-13 18:44:26,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:26,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:26,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:26,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:26,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:26,903 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 18:44:26,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:26,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093154074] [2021-11-13 18:44:26,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093154074] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:44:26,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:44:26,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:44:26,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234341181] [2021-11-13 18:44:26,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:44:26,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:44:26,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:44:26,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:44:26,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:44:26,979 INFO L87 Difference]: Start difference. First operand has 231 states, 171 states have (on average 1.3099415204678362) internal successors, (224), 183 states have internal predecessors, (224), 43 states have call successors, (43), 16 states have call predecessors, (43), 15 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:44:27,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:27,536 INFO L93 Difference]: Finished difference Result 464 states and 628 transitions. [2021-11-13 18:44:27,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:44:27,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-11-13 18:44:27,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:27,556 INFO L225 Difference]: With dead ends: 464 [2021-11-13 18:44:27,556 INFO L226 Difference]: Without dead ends: 227 [2021-11-13 18:44:27,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 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 18:44:27,567 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 46 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 383.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.99ms SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 445.12ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:27,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 616 Invalid, 160 Unknown, 0 Unchecked, 13.99ms Time], IncrementalHoareTripleChecker [49 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 445.12ms Time] [2021-11-13 18:44:27,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-13 18:44:27,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 220. [2021-11-13 18:44:27,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 166 states have (on average 1.2771084337349397) internal successors, (212), 172 states have internal predecessors, (212), 39 states have call successors, (39), 15 states have call predecessors, (39), 14 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-13 18:44:27,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 285 transitions. [2021-11-13 18:44:27,644 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 285 transitions. Word has length 32 [2021-11-13 18:44:27,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:27,645 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 285 transitions. [2021-11-13 18:44:27,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:44:27,646 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 285 transitions. [2021-11-13 18:44:27,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-13 18:44:27,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:27,648 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] [2021-11-13 18:44:27,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:44:27,649 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:27,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:27,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1376287203, now seen corresponding path program 1 times [2021-11-13 18:44:27,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:27,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069472493] [2021-11-13 18:44:27,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:27,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:27,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:27,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:27,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:27,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:27,837 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 18:44:27,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:27,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069472493] [2021-11-13 18:44:27,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069472493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:44:27,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:44:27,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:44:27,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694123067] [2021-11-13 18:44:27,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:44:27,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:44:27,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:44:27,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:44:27,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:44:27,843 INFO L87 Difference]: Start difference. First operand 220 states and 285 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 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 18:44:28,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:28,849 INFO L93 Difference]: Finished difference Result 638 states and 833 transitions. [2021-11-13 18:44:28,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:44:28,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 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 32 [2021-11-13 18:44:28,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:28,865 INFO L225 Difference]: With dead ends: 638 [2021-11-13 18:44:28,865 INFO L226 Difference]: Without dead ends: 423 [2021-11-13 18:44:28,869 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 18:44:28,876 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 300 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 736.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.46ms SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 870.37ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:28,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 841 Invalid, 352 Unknown, 0 Unchecked, 23.46ms Time], IncrementalHoareTripleChecker [102 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 870.37ms Time] [2021-11-13 18:44:28,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-11-13 18:44:28,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 409. [2021-11-13 18:44:28,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 309 states have (on average 1.2686084142394822) internal successors, (392), 317 states have internal predecessors, (392), 71 states have call successors, (71), 29 states have call predecessors, (71), 28 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-11-13 18:44:28,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 529 transitions. [2021-11-13 18:44:28,985 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 529 transitions. Word has length 32 [2021-11-13 18:44:28,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:28,986 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 529 transitions. [2021-11-13 18:44:28,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 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 18:44:28,987 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 529 transitions. [2021-11-13 18:44:28,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-13 18:44:28,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:29,000 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:29,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:44:29,000 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:29,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:29,001 INFO L85 PathProgramCache]: Analyzing trace with hash 451634024, now seen corresponding path program 1 times [2021-11-13 18:44:29,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:29,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320081924] [2021-11-13 18:44:29,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:29,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:29,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:29,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:29,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:29,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:44:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:29,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:29,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:29,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:44:29,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:29,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320081924] [2021-11-13 18:44:29,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320081924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:44:29,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:44:29,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:44:29,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421976800] [2021-11-13 18:44:29,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:44:29,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:44:29,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:44:29,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:44:29,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:44:29,327 INFO L87 Difference]: Start difference. First operand 409 states and 529 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:44:30,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:30,139 INFO L93 Difference]: Finished difference Result 970 states and 1293 transitions. [2021-11-13 18:44:30,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:44:30,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2021-11-13 18:44:30,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:30,151 INFO L225 Difference]: With dead ends: 970 [2021-11-13 18:44:30,151 INFO L226 Difference]: Without dead ends: 576 [2021-11-13 18:44:30,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 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 18:44:30,165 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 641 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 538.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.41ms SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 660.07ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:30,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 1280 Invalid, 459 Unknown, 0 Unchecked, 23.41ms Time], IncrementalHoareTripleChecker [201 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 660.07ms Time] [2021-11-13 18:44:30,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-11-13 18:44:30,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 412. [2021-11-13 18:44:30,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 312 states have (on average 1.2628205128205128) internal successors, (394), 320 states have internal predecessors, (394), 71 states have call successors, (71), 29 states have call predecessors, (71), 28 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-11-13 18:44:30,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 531 transitions. [2021-11-13 18:44:30,240 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 531 transitions. Word has length 55 [2021-11-13 18:44:30,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:30,241 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 531 transitions. [2021-11-13 18:44:30,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:44:30,242 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 531 transitions. [2021-11-13 18:44:30,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-13 18:44:30,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:30,244 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:30,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:44:30,245 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:30,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:30,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1188950696, now seen corresponding path program 1 times [2021-11-13 18:44:30,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:30,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904917609] [2021-11-13 18:44:30,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:30,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:30,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:30,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:30,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:30,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:44:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:30,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:30,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:44:30,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:30,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904917609] [2021-11-13 18:44:30,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904917609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:44:30,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:44:30,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:44:30,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258817115] [2021-11-13 18:44:30,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:44:30,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:44:30,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:44:30,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:44:30,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:44:30,460 INFO L87 Difference]: Start difference. First operand 412 states and 531 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:44:31,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:31,282 INFO L93 Difference]: Finished difference Result 1233 states and 1608 transitions. [2021-11-13 18:44:31,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:44:31,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2021-11-13 18:44:31,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:31,296 INFO L225 Difference]: With dead ends: 1233 [2021-11-13 18:44:31,296 INFO L226 Difference]: Without dead ends: 836 [2021-11-13 18:44:31,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 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 18:44:31,300 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 310 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 600.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.13ms SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 704.13ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:31,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 833 Invalid, 356 Unknown, 0 Unchecked, 12.13ms Time], IncrementalHoareTripleChecker [111 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 704.13ms Time] [2021-11-13 18:44:31,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-11-13 18:44:31,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 798. [2021-11-13 18:44:31,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 609 states have (on average 1.2594417077175697) internal successors, (767), 621 states have internal predecessors, (767), 134 states have call successors, (134), 55 states have call predecessors, (134), 54 states have return successors, (131), 129 states have call predecessors, (131), 129 states have call successors, (131) [2021-11-13 18:44:31,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1032 transitions. [2021-11-13 18:44:31,375 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1032 transitions. Word has length 55 [2021-11-13 18:44:31,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:31,376 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 1032 transitions. [2021-11-13 18:44:31,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:44:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1032 transitions. [2021-11-13 18:44:31,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-13 18:44:31,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:31,379 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:31,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:44:31,380 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:31,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:31,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1797229676, now seen corresponding path program 1 times [2021-11-13 18:44:31,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:31,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170413653] [2021-11-13 18:44:31,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:31,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:31,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:31,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:31,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:31,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:44:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:31,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:31,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:44:31,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:31,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170413653] [2021-11-13 18:44:31,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170413653] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:44:31,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:44:31,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:44:31,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512732199] [2021-11-13 18:44:31,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:44:31,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:44:31,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:44:31,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:44:31,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:44:31,613 INFO L87 Difference]: Start difference. First operand 798 states and 1032 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:44:32,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:32,105 INFO L93 Difference]: Finished difference Result 828 states and 1077 transitions. [2021-11-13 18:44:32,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:44:32,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2021-11-13 18:44:32,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:32,114 INFO L225 Difference]: With dead ends: 828 [2021-11-13 18:44:32,115 INFO L226 Difference]: Without dead ends: 825 [2021-11-13 18:44:32,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 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 18:44:32,117 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 267 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 337.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.52ms SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 400.33ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:32,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 579 Invalid, 178 Unknown, 0 Unchecked, 6.52ms Time], IncrementalHoareTripleChecker [63 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 400.33ms Time] [2021-11-13 18:44:32,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-11-13 18:44:32,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 797. [2021-11-13 18:44:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 609 states have (on average 1.257799671592775) internal successors, (766), 620 states have internal predecessors, (766), 133 states have call successors, (133), 55 states have call predecessors, (133), 54 states have return successors, (131), 129 states have call predecessors, (131), 129 states have call successors, (131) [2021-11-13 18:44:32,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1030 transitions. [2021-11-13 18:44:32,193 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1030 transitions. Word has length 56 [2021-11-13 18:44:32,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:32,194 INFO L470 AbstractCegarLoop]: Abstraction has 797 states and 1030 transitions. [2021-11-13 18:44:32,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:44:32,194 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1030 transitions. [2021-11-13 18:44:32,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 18:44:32,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:32,196 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:32,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:44:32,197 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:32,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:32,198 INFO L85 PathProgramCache]: Analyzing trace with hash 120464171, now seen corresponding path program 1 times [2021-11-13 18:44:32,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:32,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474884256] [2021-11-13 18:44:32,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:32,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:32,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:32,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:32,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:32,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:44:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:32,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:32,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:32,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:44:32,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:32,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474884256] [2021-11-13 18:44:32,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474884256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:44:32,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:44:32,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:44:32,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767383786] [2021-11-13 18:44:32,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:44:32,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:44:32,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:44:32,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:44:32,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:44:32,367 INFO L87 Difference]: Start difference. First operand 797 states and 1030 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:44:32,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:32,916 INFO L93 Difference]: Finished difference Result 827 states and 1075 transitions. [2021-11-13 18:44:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:44:32,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2021-11-13 18:44:32,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:32,929 INFO L225 Difference]: With dead ends: 827 [2021-11-13 18:44:32,929 INFO L226 Difference]: Without dead ends: 824 [2021-11-13 18:44:32,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 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 18:44:32,934 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 264 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 315.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.50ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 404.24ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:32,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 575 Invalid, 177 Unknown, 0 Unchecked, 7.50ms Time], IncrementalHoareTripleChecker [62 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 404.24ms Time] [2021-11-13 18:44:32,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-11-13 18:44:33,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 796. [2021-11-13 18:44:33,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 609 states have (on average 1.2561576354679802) internal successors, (765), 619 states have internal predecessors, (765), 132 states have call successors, (132), 55 states have call predecessors, (132), 54 states have return successors, (131), 129 states have call predecessors, (131), 129 states have call successors, (131) [2021-11-13 18:44:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1028 transitions. [2021-11-13 18:44:33,032 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1028 transitions. Word has length 57 [2021-11-13 18:44:33,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:33,033 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 1028 transitions. [2021-11-13 18:44:33,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:44:33,036 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1028 transitions. [2021-11-13 18:44:33,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 18:44:33,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:33,039 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:33,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:44:33,040 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:33,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:33,040 INFO L85 PathProgramCache]: Analyzing trace with hash -560563849, now seen corresponding path program 1 times [2021-11-13 18:44:33,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:33,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918882182] [2021-11-13 18:44:33,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:33,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:33,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:33,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:33,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:33,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:44:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:33,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:33,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:44:33,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:33,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918882182] [2021-11-13 18:44:33,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918882182] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:44:33,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:44:33,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:44:33,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250908804] [2021-11-13 18:44:33,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:44:33,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:44:33,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:44:33,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:44:33,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:44:33,240 INFO L87 Difference]: Start difference. First operand 796 states and 1028 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:44:33,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:33,620 INFO L93 Difference]: Finished difference Result 826 states and 1073 transitions. [2021-11-13 18:44:33,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:44:33,621 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2021-11-13 18:44:33,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:33,628 INFO L225 Difference]: With dead ends: 826 [2021-11-13 18:44:33,629 INFO L226 Difference]: Without dead ends: 823 [2021-11-13 18:44:33,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 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 18:44:33,631 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 298 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 235.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.78ms SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 284.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:33,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 420 Invalid, 167 Unknown, 0 Unchecked, 4.78ms Time], IncrementalHoareTripleChecker [97 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 284.76ms Time] [2021-11-13 18:44:33,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-11-13 18:44:33,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 795. [2021-11-13 18:44:33,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 609 states have (on average 1.2545155993431856) internal successors, (764), 618 states have internal predecessors, (764), 131 states have call successors, (131), 55 states have call predecessors, (131), 54 states have return successors, (131), 129 states have call predecessors, (131), 129 states have call successors, (131) [2021-11-13 18:44:33,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1026 transitions. [2021-11-13 18:44:33,712 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1026 transitions. Word has length 58 [2021-11-13 18:44:33,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:33,713 INFO L470 AbstractCegarLoop]: Abstraction has 795 states and 1026 transitions. [2021-11-13 18:44:33,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:44:33,714 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1026 transitions. [2021-11-13 18:44:33,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-13 18:44:33,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:33,716 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:33,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:44:33,716 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:33,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:33,717 INFO L85 PathProgramCache]: Analyzing trace with hash -197591122, now seen corresponding path program 1 times [2021-11-13 18:44:33,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:33,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478109124] [2021-11-13 18:44:33,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:33,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:33,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:33,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:33,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:33,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:44:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:33,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:33,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:44:33,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:33,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478109124] [2021-11-13 18:44:33,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478109124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:44:33,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:44:33,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:44:33,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818146406] [2021-11-13 18:44:33,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:44:33,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:44:33,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:44:33,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:44:33,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:44:33,923 INFO L87 Difference]: Start difference. First operand 795 states and 1026 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:44:34,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:34,414 INFO L93 Difference]: Finished difference Result 825 states and 1071 transitions. [2021-11-13 18:44:34,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:44:34,415 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2021-11-13 18:44:34,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:34,423 INFO L225 Difference]: With dead ends: 825 [2021-11-13 18:44:34,423 INFO L226 Difference]: Without dead ends: 813 [2021-11-13 18:44:34,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:44:34,425 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 258 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 335.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.75ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 388.39ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:34,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 570 Invalid, 172 Unknown, 0 Unchecked, 5.75ms Time], IncrementalHoareTripleChecker [60 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 388.39ms Time] [2021-11-13 18:44:34,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-11-13 18:44:34,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 785. [2021-11-13 18:44:34,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 600 states have (on average 1.2533333333333334) internal successors, (752), 608 states have internal predecessors, (752), 130 states have call successors, (130), 55 states have call predecessors, (130), 54 states have return successors, (131), 129 states have call predecessors, (131), 129 states have call successors, (131) [2021-11-13 18:44:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1013 transitions. [2021-11-13 18:44:34,503 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1013 transitions. Word has length 59 [2021-11-13 18:44:34,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:34,504 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 1013 transitions. [2021-11-13 18:44:34,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:44:34,505 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1013 transitions. [2021-11-13 18:44:34,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-13 18:44:34,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:34,518 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:34,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:44:34,518 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:34,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:34,522 INFO L85 PathProgramCache]: Analyzing trace with hash 415459010, now seen corresponding path program 1 times [2021-11-13 18:44:34,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:34,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167824180] [2021-11-13 18:44:34,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:34,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:34,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:34,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:34,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:34,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 18:44:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:34,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:44:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:34,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-13 18:44:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:34,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-13 18:44:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:34,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:34,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:44:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:34,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:34,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 18:44:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:34,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-13 18:44:34,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:34,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-13 18:44:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:34,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:44:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:34,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-13 18:44:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:34,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:44:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:34,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:34,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 18:44:34,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:34,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167824180] [2021-11-13 18:44:34,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167824180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:44:34,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:44:34,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:44:34,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250306225] [2021-11-13 18:44:34,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:44:34,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:44:34,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:44:34,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:44:34,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:44:34,845 INFO L87 Difference]: Start difference. First operand 785 states and 1013 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (16), 6 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 18:44:35,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:35,417 INFO L93 Difference]: Finished difference Result 1647 states and 2141 transitions. [2021-11-13 18:44:35,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:44:35,418 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (16), 6 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 159 [2021-11-13 18:44:35,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:35,425 INFO L225 Difference]: With dead ends: 1647 [2021-11-13 18:44:35,426 INFO L226 Difference]: Without dead ends: 877 [2021-11-13 18:44:35,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:44:35,432 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 171 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 365.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.31ms SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 439.62ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:35,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 790 Invalid, 296 Unknown, 0 Unchecked, 7.31ms Time], IncrementalHoareTripleChecker [136 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 439.62ms Time] [2021-11-13 18:44:35,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-11-13 18:44:35,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 839. [2021-11-13 18:44:35,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 653 states have (on average 1.2649310872894335) internal successors, (826), 661 states have internal predecessors, (826), 130 states have call successors, (130), 56 states have call predecessors, (130), 55 states have return successors, (131), 129 states have call predecessors, (131), 129 states have call successors, (131) [2021-11-13 18:44:35,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1087 transitions. [2021-11-13 18:44:35,549 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1087 transitions. Word has length 159 [2021-11-13 18:44:35,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:35,550 INFO L470 AbstractCegarLoop]: Abstraction has 839 states and 1087 transitions. [2021-11-13 18:44:35,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (16), 6 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 18:44:35,551 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1087 transitions. [2021-11-13 18:44:35,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-13 18:44:35,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:35,557 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:35,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:44:35,558 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:35,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:35,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1466528889, now seen corresponding path program 1 times [2021-11-13 18:44:35,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:35,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318633760] [2021-11-13 18:44:35,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:35,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:35,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:35,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:35,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:35,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:44:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:35,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:35,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:35,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:44:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:35,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-13 18:44:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:35,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-13 18:44:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:35,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:44:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:35,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:35,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-13 18:44:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:35,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:35,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-13 18:44:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:35,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-13 18:44:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:35,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-11-13 18:44:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:35,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-13 18:44:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:35,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-13 18:44:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:44:35,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:35,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318633760] [2021-11-13 18:44:35,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318633760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:44:35,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:44:35,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-13 18:44:35,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630110719] [2021-11-13 18:44:35,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:44:35,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:44:35,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:44:35,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:44:35,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:44:35,881 INFO L87 Difference]: Start difference. First operand 839 states and 1087 transitions. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (16), 6 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 18:44:36,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:36,505 INFO L93 Difference]: Finished difference Result 2261 states and 3026 transitions. [2021-11-13 18:44:36,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:44:36,506 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (16), 6 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 168 [2021-11-13 18:44:36,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:36,516 INFO L225 Difference]: With dead ends: 2261 [2021-11-13 18:44:36,517 INFO L226 Difference]: Without dead ends: 1441 [2021-11-13 18:44:36,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:44:36,520 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 491 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 412.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.48ms SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 485.65ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:36,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 1613 Invalid, 439 Unknown, 0 Unchecked, 13.48ms Time], IncrementalHoareTripleChecker [166 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 485.65ms Time] [2021-11-13 18:44:36,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2021-11-13 18:44:36,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 851. [2021-11-13 18:44:36,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 665 states have (on average 1.2601503759398496) internal successors, (838), 673 states have internal predecessors, (838), 130 states have call successors, (130), 56 states have call predecessors, (130), 55 states have return successors, (131), 129 states have call predecessors, (131), 129 states have call successors, (131) [2021-11-13 18:44:36,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1099 transitions. [2021-11-13 18:44:36,639 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1099 transitions. Word has length 168 [2021-11-13 18:44:36,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:36,640 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1099 transitions. [2021-11-13 18:44:36,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (16), 6 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 18:44:36,640 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1099 transitions. [2021-11-13 18:44:36,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-13 18:44:36,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:36,646 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:36,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:44:36,647 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:36,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:36,647 INFO L85 PathProgramCache]: Analyzing trace with hash -527055154, now seen corresponding path program 1 times [2021-11-13 18:44:36,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:36,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970264970] [2021-11-13 18:44:36,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:36,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:36,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:36,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:36,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:36,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:44:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:36,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:36,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:36,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:44:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:36,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 18:44:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:36,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 18:44:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:36,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-13 18:44:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:36,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:36,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-13 18:44:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:36,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:36,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-13 18:44:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:36,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-11-13 18:44:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:36,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:44:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:36,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-13 18:44:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:36,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-13 18:44:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:44:37,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:37,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970264970] [2021-11-13 18:44:37,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970264970] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:44:37,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879267713] [2021-11-13 18:44:37,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:37,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:44:37,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:44:37,007 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:44:37,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:44:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:37,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 1315 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:44:37,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:44:37,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:44:37,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879267713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:44:37,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:44:37,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-11-13 18:44:37,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537366635] [2021-11-13 18:44:37,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:44:37,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:44:37,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:44:37,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:44:37,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:44:37,980 INFO L87 Difference]: Start difference. First operand 851 states and 1099 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 18:44:38,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:38,352 INFO L93 Difference]: Finished difference Result 2761 states and 3600 transitions. [2021-11-13 18:44:38,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:44:38,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 170 [2021-11-13 18:44:38,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:38,371 INFO L225 Difference]: With dead ends: 2761 [2021-11-13 18:44:38,371 INFO L226 Difference]: Without dead ends: 1929 [2021-11-13 18:44:38,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:44:38,376 INFO L933 BasicCegarLoop]: 568 mSDtfsCounter, 388 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 1824 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.78ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 100.99ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:38,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 1824 Invalid, 63 Unknown, 0 Unchecked, 7.78ms Time], IncrementalHoareTripleChecker [16 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 100.99ms Time] [2021-11-13 18:44:38,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-11-13 18:44:38,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 887. [2021-11-13 18:44:38,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 693 states have (on average 1.2496392496392497) internal successors, (866), 701 states have internal predecessors, (866), 138 states have call successors, (138), 56 states have call predecessors, (138), 55 states have return successors, (139), 137 states have call predecessors, (139), 137 states have call successors, (139) [2021-11-13 18:44:38,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1143 transitions. [2021-11-13 18:44:38,498 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1143 transitions. Word has length 170 [2021-11-13 18:44:38,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:38,499 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 1143 transitions. [2021-11-13 18:44:38,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 18:44:38,500 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1143 transitions. [2021-11-13 18:44:38,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-13 18:44:38,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:38,505 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:38,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:44:38,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-13 18:44:38,720 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:38,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:38,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1538172404, now seen corresponding path program 1 times [2021-11-13 18:44:38,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:38,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178309545] [2021-11-13 18:44:38,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:38,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:38,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:38,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:38,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:38,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:38,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:38,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:38,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:44:38,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:38,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:38,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:38,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:44:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:38,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 18:44:38,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:38,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 18:44:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:39,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-13 18:44:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:39,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:39,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-13 18:44:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:39,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:39,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-13 18:44:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:39,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-11-13 18:44:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:39,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:44:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:39,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-13 18:44:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:39,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-13 18:44:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:39,076 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-13 18:44:39,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:39,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178309545] [2021-11-13 18:44:39,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178309545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:44:39,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915899915] [2021-11-13 18:44:39,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:39,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:44:39,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:44:39,079 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:44:39,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:44:39,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:39,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 18:44:39,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-13 18:44:40,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:44:40,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915899915] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:44:40,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:44:40,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2021-11-13 18:44:40,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020694838] [2021-11-13 18:44:40,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:44:40,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:44:40,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:44:40,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:44:40,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:44:40,301 INFO L87 Difference]: Start difference. First operand 887 states and 1143 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 18:44:40,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:40,702 INFO L93 Difference]: Finished difference Result 2381 states and 3188 transitions. [2021-11-13 18:44:40,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:44:40,703 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 170 [2021-11-13 18:44:40,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:40,715 INFO L225 Difference]: With dead ends: 2381 [2021-11-13 18:44:40,716 INFO L226 Difference]: Without dead ends: 1513 [2021-11-13 18:44:40,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:44:40,721 INFO L933 BasicCegarLoop]: 436 mSDtfsCounter, 599 mSDsluCounter, 1636 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 154.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 2072 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.72ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 186.10ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:40,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 2072 Invalid, 158 Unknown, 0 Unchecked, 11.72ms Time], IncrementalHoareTripleChecker [44 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 186.10ms Time] [2021-11-13 18:44:40,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-11-13 18:44:40,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 915. [2021-11-13 18:44:40,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 713 states have (on average 1.2482468443197756) internal successors, (890), 721 states have internal predecessors, (890), 142 states have call successors, (142), 56 states have call predecessors, (142), 59 states have return successors, (159), 145 states have call predecessors, (159), 141 states have call successors, (159) [2021-11-13 18:44:40,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1191 transitions. [2021-11-13 18:44:40,853 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1191 transitions. Word has length 170 [2021-11-13 18:44:40,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:40,854 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 1191 transitions. [2021-11-13 18:44:40,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 18:44:40,855 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1191 transitions. [2021-11-13 18:44:40,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-13 18:44:40,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:40,862 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:40,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:44:41,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-13 18:44:41,076 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:41,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:41,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1639605590, now seen corresponding path program 1 times [2021-11-13 18:44:41,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:41,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399747365] [2021-11-13 18:44:41,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:41,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:41,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:41,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:41,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:41,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:44:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:41,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:41,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:41,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:44:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:41,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 18:44:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:41,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 18:44:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:41,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-13 18:44:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:41,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:41,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-13 18:44:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:41,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:41,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-13 18:44:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:41,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-11-13 18:44:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:41,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:41,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-11-13 18:44:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:41,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-11-13 18:44:41,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:41,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-13 18:44:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:44:41,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:41,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399747365] [2021-11-13 18:44:41,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399747365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:44:41,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016412088] [2021-11-13 18:44:41,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:41,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:44:41,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:44:41,465 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:44:41,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:44:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:42,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 1332 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-13 18:44:42,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-13 18:44:42,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:44:42,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016412088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:44:42,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:44:42,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 9 [2021-11-13 18:44:42,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628535501] [2021-11-13 18:44:42,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:44:42,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:44:42,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:44:42,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:44:42,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:44:42,385 INFO L87 Difference]: Start difference. First operand 915 states and 1191 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 18:44:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:42,506 INFO L93 Difference]: Finished difference Result 1819 states and 2371 transitions. [2021-11-13 18:44:42,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:44:42,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 176 [2021-11-13 18:44:42,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:42,515 INFO L225 Difference]: With dead ends: 1819 [2021-11-13 18:44:42,515 INFO L226 Difference]: Without dead ends: 915 [2021-11-13 18:44:42,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:44:42,520 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 0 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.42ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.45ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:42,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1082 Invalid, 9 Unknown, 0 Unchecked, 3.42ms Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 9.45ms Time] [2021-11-13 18:44:42,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-11-13 18:44:42,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 915. [2021-11-13 18:44:42,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 713 states have (on average 1.2482468443197756) internal successors, (890), 721 states have internal predecessors, (890), 142 states have call successors, (142), 56 states have call predecessors, (142), 59 states have return successors, (155), 145 states have call predecessors, (155), 141 states have call successors, (155) [2021-11-13 18:44:42,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1187 transitions. [2021-11-13 18:44:42,636 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1187 transitions. Word has length 176 [2021-11-13 18:44:42,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:42,637 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 1187 transitions. [2021-11-13 18:44:42,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 18:44:42,638 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1187 transitions. [2021-11-13 18:44:42,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-13 18:44:42,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:42,643 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 18:44:42,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:44:42,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-13 18:44:42,856 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:42,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:42,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1553784756, now seen corresponding path program 2 times [2021-11-13 18:44:42,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:42,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388830284] [2021-11-13 18:44:42,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:42,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:43,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:43,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:43,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:43,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:44:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:43,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:43,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:43,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:44:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:43,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:43,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:43,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 18:44:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:43,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-13 18:44:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:43,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-13 18:44:43,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:43,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:43,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-13 18:44:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:43,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:43,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-13 18:44:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:43,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:44:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:43,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:43,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-13 18:44:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:43,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-11-13 18:44:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:43,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-13 18:44:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-13 18:44:43,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:43,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388830284] [2021-11-13 18:44:43,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388830284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:44:43,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319870702] [2021-11-13 18:44:43,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:44:43,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:44:43,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:44:43,436 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:44:43,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:44:43,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-13 18:44:43,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:44:43,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-13 18:44:43,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:44,485 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 18:44:44,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:44:44,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319870702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:44:44,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:44:44,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2021-11-13 18:44:44,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729324411] [2021-11-13 18:44:44,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:44:44,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:44:44,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:44:44,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:44:44,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:44:44,488 INFO L87 Difference]: Start difference. First operand 915 states and 1187 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 3 states have call successors, (17), 3 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 18:44:45,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:45,270 INFO L93 Difference]: Finished difference Result 2571 states and 3412 transitions. [2021-11-13 18:44:45,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:44:45,271 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 3 states have call successors, (17), 3 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 182 [2021-11-13 18:44:45,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:45,285 INFO L225 Difference]: With dead ends: 2571 [2021-11-13 18:44:45,286 INFO L226 Difference]: Without dead ends: 1665 [2021-11-13 18:44:45,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:44:45,291 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 659 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 399.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.84ms SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 483.88ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:45,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [659 Valid, 1257 Invalid, 449 Unknown, 0 Unchecked, 9.84ms Time], IncrementalHoareTripleChecker [82 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 483.88ms Time] [2021-11-13 18:44:45,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2021-11-13 18:44:45,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1125. [2021-11-13 18:44:45,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 884 states have (on average 1.23868778280543) internal successors, (1095), 896 states have internal predecessors, (1095), 161 states have call successors, (161), 74 states have call predecessors, (161), 79 states have return successors, (180), 166 states have call predecessors, (180), 160 states have call successors, (180) [2021-11-13 18:44:45,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1436 transitions. [2021-11-13 18:44:45,503 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1436 transitions. Word has length 182 [2021-11-13 18:44:45,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:45,505 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 1436 transitions. [2021-11-13 18:44:45,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 3 states have call successors, (17), 3 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 18:44:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1436 transitions. [2021-11-13 18:44:45,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-13 18:44:45,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:45,513 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:45,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:44:45,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:44:45,726 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:45,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:45,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1339610442, now seen corresponding path program 1 times [2021-11-13 18:44:45,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:45,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760983358] [2021-11-13 18:44:45,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:45,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:45,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:45,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:45,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:45,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:45,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:44:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:45,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:45,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:46,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:44:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:46,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:46,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 18:44:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:46,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-13 18:44:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:46,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-13 18:44:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:46,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:46,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-13 18:44:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:46,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:46,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-13 18:44:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:46,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:44:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:46,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:46,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-13 18:44:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:46,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-11-13 18:44:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:46,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-11-13 18:44:46,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 18:44:46,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:46,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760983358] [2021-11-13 18:44:46,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760983358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:44:46,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125395706] [2021-11-13 18:44:46,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:46,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:44:46,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:44:46,128 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:44:46,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:44:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:46,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:44:46,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:44:47,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:44:47,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125395706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:44:47,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:44:47,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 9 [2021-11-13 18:44:47,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43277004] [2021-11-13 18:44:47,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:44:47,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:44:47,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:44:47,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:44:47,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:44:47,258 INFO L87 Difference]: Start difference. First operand 1125 states and 1436 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 18:44:47,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:47,730 INFO L93 Difference]: Finished difference Result 3037 states and 3880 transitions. [2021-11-13 18:44:47,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:44:47,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 201 [2021-11-13 18:44:47,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:47,752 INFO L225 Difference]: With dead ends: 3037 [2021-11-13 18:44:47,753 INFO L226 Difference]: Without dead ends: 3029 [2021-11-13 18:44:47,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:44:47,758 INFO L933 BasicCegarLoop]: 560 mSDtfsCounter, 387 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 148.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.20ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 177.75ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:47,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 1051 Invalid, 90 Unknown, 0 Unchecked, 6.20ms Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 177.75ms Time] [2021-11-13 18:44:47,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2021-11-13 18:44:48,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 3013. [2021-11-13 18:44:48,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 2365 states have (on average 1.2414376321353064) internal successors, (2936), 2403 states have internal predecessors, (2936), 434 states have call successors, (434), 196 states have call predecessors, (434), 213 states have return successors, (487), 445 states have call predecessors, (487), 433 states have call successors, (487) [2021-11-13 18:44:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 3857 transitions. [2021-11-13 18:44:48,127 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 3857 transitions. Word has length 201 [2021-11-13 18:44:48,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:48,128 INFO L470 AbstractCegarLoop]: Abstraction has 3013 states and 3857 transitions. [2021-11-13 18:44:48,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 18:44:48,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 3857 transitions. [2021-11-13 18:44:48,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-13 18:44:48,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:48,136 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:48,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:44:48,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:44:48,364 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:48,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:48,365 INFO L85 PathProgramCache]: Analyzing trace with hash 328493192, now seen corresponding path program 1 times [2021-11-13 18:44:48,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:48,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099646822] [2021-11-13 18:44:48,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:48,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:48,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:48,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:48,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:48,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:48,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:44:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:48,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:48,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:48,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:44:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:48,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:48,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 18:44:48,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:48,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-13 18:44:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:48,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-13 18:44:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:48,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:48,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-13 18:44:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:48,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:48,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-13 18:44:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:48,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:44:48,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:48,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:48,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-13 18:44:48,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:48,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-11-13 18:44:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:48,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-11-13 18:44:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 18:44:48,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:48,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099646822] [2021-11-13 18:44:48,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099646822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:44:48,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:44:48,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:44:48,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818225872] [2021-11-13 18:44:48,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:44:48,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:44:48,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:44:48,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:44:48,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:44:48,738 INFO L87 Difference]: Start difference. First operand 3013 states and 3857 transitions. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-13 18:44:50,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:50,392 INFO L93 Difference]: Finished difference Result 8643 states and 11128 transitions. [2021-11-13 18:44:50,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 18:44:50,393 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 201 [2021-11-13 18:44:50,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:50,440 INFO L225 Difference]: With dead ends: 8643 [2021-11-13 18:44:50,440 INFO L226 Difference]: Without dead ends: 5649 [2021-11-13 18:44:50,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:44:50,451 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 454 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 814.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1607 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.22ms SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 955.46ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:50,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 1607 Invalid, 671 Unknown, 0 Unchecked, 16.22ms Time], IncrementalHoareTripleChecker [200 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 955.46ms Time] [2021-11-13 18:44:50,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5649 states. [2021-11-13 18:44:51,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5649 to 5005. [2021-11-13 18:44:51,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5005 states, 3900 states have (on average 1.245128205128205) internal successors, (4856), 3992 states have internal predecessors, (4856), 741 states have call successors, (741), 334 states have call predecessors, (741), 363 states have return successors, (830), 730 states have call predecessors, (830), 740 states have call successors, (830) [2021-11-13 18:44:51,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5005 states to 5005 states and 6427 transitions. [2021-11-13 18:44:51,179 INFO L78 Accepts]: Start accepts. Automaton has 5005 states and 6427 transitions. Word has length 201 [2021-11-13 18:44:51,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:51,180 INFO L470 AbstractCegarLoop]: Abstraction has 5005 states and 6427 transitions. [2021-11-13 18:44:51,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-13 18:44:51,180 INFO L276 IsEmpty]: Start isEmpty. Operand 5005 states and 6427 transitions. [2021-11-13 18:44:51,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-13 18:44:51,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:51,192 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:51,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 18:44:51,192 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:51,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:51,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1900626580, now seen corresponding path program 1 times [2021-11-13 18:44:51,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:51,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32700275] [2021-11-13 18:44:51,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:51,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:44:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:44:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:44:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 18:44:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-13 18:44:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-13 18:44:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-13 18:44:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:44:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-13 18:44:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:44:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:44:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-13 18:44:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-11-13 18:44:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-11-13 18:44:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-11-13 18:44:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-13 18:44:51,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:51,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32700275] [2021-11-13 18:44:51,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32700275] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:44:51,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080943064] [2021-11-13 18:44:51,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:51,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:44:51,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:44:51,660 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:44:51,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:44:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:52,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 1614 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-13 18:44:52,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:52,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 18:44:52,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-13 18:44:53,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-13 18:44:53,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-11-13 18:45:03,969 INFO L354 Elim1Store]: treesize reduction 16, result has 23.8 percent of original size [2021-11-13 18:45:03,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-11-13 18:45:03,977 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:45:03,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-11-13 18:48:16,031 INFO L354 Elim1Store]: treesize reduction 29, result has 38.3 percent of original size [2021-11-13 18:48:16,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 51 [2021-11-13 18:48:16,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2021-11-13 18:49:46,986 INFO L354 Elim1Store]: treesize reduction 29, result has 38.3 percent of original size [2021-11-13 18:49:46,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 73 [2021-11-13 18:49:47,068 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-13 18:49:47,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:49:47,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-13 18:49:47,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590993095] [2021-11-13 18:49:47,069 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:47,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:49:47,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:47,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:49:47,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1521, Unknown=39, NotChecked=0, Total=1722 [2021-11-13 18:49:47,071 INFO L87 Difference]: Start difference. First operand 5005 states and 6427 transitions. Second operand has 13 states, 13 states have (on average 10.461538461538462) internal successors, (136), 7 states have internal predecessors, (136), 3 states have call successors, (18), 6 states have call predecessors, (18), 3 states have return successors, (18), 5 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-13 18:49:47,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:49:47,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 150 SyntacticMatches, 14 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 289.3s TimeCoverageRelationStatistics Valid=162, Invalid=1521, Unknown=39, NotChecked=0, Total=1722 [2021-11-13 18:49:47,073 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.04ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:47,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.04ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:49:47,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:47,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-13 18:49:47,288 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6d93a5fb at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 18:49:47,292 INFO L158 Benchmark]: Toolchain (without parser) took 324839.08ms. Allocated memory was 109.1MB in the beginning and 440.4MB in the end (delta: 331.4MB). Free memory was 83.9MB in the beginning and 208.0MB in the end (delta: -124.1MB). Peak memory consumption was 205.7MB. Max. memory is 16.1GB. [2021-11-13 18:49:47,293 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 109.1MB. Free memory is still 82.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:49:47,293 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1731.65ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 83.6MB in the beginning and 75.6MB in the end (delta: 8.0MB). Peak memory consumption was 38.2MB. Max. memory is 16.1GB. [2021-11-13 18:49:47,293 INFO L158 Benchmark]: Boogie Procedure Inliner took 150.12ms. Allocated memory is still 132.1MB. Free memory was 75.6MB in the beginning and 69.4MB in the end (delta: 6.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-13 18:49:47,294 INFO L158 Benchmark]: Boogie Preprocessor took 98.55ms. Allocated memory is still 132.1MB. Free memory was 69.4MB in the beginning and 63.8MB in the end (delta: 5.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-13 18:49:47,294 INFO L158 Benchmark]: RCFGBuilder took 1628.27ms. Allocated memory is still 132.1MB. Free memory was 63.8MB in the beginning and 74.2MB in the end (delta: -10.4MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2021-11-13 18:49:47,294 INFO L158 Benchmark]: TraceAbstraction took 321220.93ms. Allocated memory was 132.1MB in the beginning and 440.4MB in the end (delta: 308.3MB). Free memory was 73.5MB in the beginning and 208.0MB in the end (delta: -134.5MB). Peak memory consumption was 173.8MB. Max. memory is 16.1GB. [2021-11-13 18:49:47,296 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 109.1MB. Free memory is still 82.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1731.65ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 83.6MB in the beginning and 75.6MB in the end (delta: 8.0MB). Peak memory consumption was 38.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 150.12ms. Allocated memory is still 132.1MB. Free memory was 75.6MB in the beginning and 69.4MB in the end (delta: 6.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 98.55ms. Allocated memory is still 132.1MB. Free memory was 69.4MB in the beginning and 63.8MB in the end (delta: 5.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 1628.27ms. Allocated memory is still 132.1MB. Free memory was 63.8MB in the beginning and 74.2MB in the end (delta: -10.4MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * TraceAbstraction took 321220.93ms. Allocated memory was 132.1MB in the beginning and 440.4MB in the end (delta: 308.3MB). Free memory was 73.5MB in the beginning and 208.0MB in the end (delta: -134.5MB). Peak memory consumption was 173.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6d93a5fb de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6d93a5fb: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 18:49:47,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/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_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/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_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/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 07ae4eb392cc9822cbd398c1edf107cccc60d6668bc59dbf5a692a6b9350873b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:49:49,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:49:49,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:49:49,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:49:49,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:49:49,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:49:49,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:49:49,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:49:49,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:49:49,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:49:49,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:49:49,687 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:49:49,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:49:49,689 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:49:49,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:49:49,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:49:49,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:49:49,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:49:49,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:49:49,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:49:49,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:49:49,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:49:49,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:49:49,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:49:49,724 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:49:49,725 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:49:49,725 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:49:49,727 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:49:49,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:49:49,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:49:49,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:49:49,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:49:49,732 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:49:49,733 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:49:49,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:49:49,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:49:49,736 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:49:49,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:49:49,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:49:49,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:49:49,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:49:49,739 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-11-13 18:49:49,778 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:49:49,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:49:49,779 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:49:49,779 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:49:49,780 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:49:49,780 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:49:49,781 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:49:49,781 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:49:49,781 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:49:49,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:49:49,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:49:49,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:49:49,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:49:49,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:49:49,783 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 18:49:49,783 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 18:49:49,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:49:49,783 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:49:49,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:49:49,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:49:49,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:49:49,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:49:49,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:49:49,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:49:49,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:49:49,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:49:49,785 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-13 18:49:49,786 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 18:49:49,786 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:49:49,786 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:49:49,786 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:49:49,786 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:49:49,787 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 18:49:49,787 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_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07ae4eb392cc9822cbd398c1edf107cccc60d6668bc59dbf5a692a6b9350873b [2021-11-13 18:49:50,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:49:50,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:49:50,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:49:50,142 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:49:50,143 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:49:50,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-13 18:49:50,216 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/data/2a7b965a1/4d58b092be1d4739aa40f97083424ada/FLAG656cf44bd [2021-11-13 18:49:50,890 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:49:50,891 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-13 18:49:50,921 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/data/2a7b965a1/4d58b092be1d4739aa40f97083424ada/FLAG656cf44bd [2021-11-13 18:49:51,058 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/data/2a7b965a1/4d58b092be1d4739aa40f97083424ada [2021-11-13 18:49:51,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:49:51,064 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:49:51,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:49:51,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:49:51,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:49:51,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:49:51" (1/1) ... [2021-11-13 18:49:51,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30911fa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:51, skipping insertion in model container [2021-11-13 18:49:51,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:49:51" (1/1) ... [2021-11-13 18:49:51,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:49:51,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:49:52,186 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_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113497,113510] [2021-11-13 18:49:52,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:49:52,275 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:49:52,458 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_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113497,113510] [2021-11-13 18:49:52,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:49:52,527 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:49:52,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:52 WrapperNode [2021-11-13 18:49:52,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:49:52,529 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:49:52,529 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:49:52,529 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:49:52,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:52" (1/1) ... [2021-11-13 18:49:52,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:52" (1/1) ... [2021-11-13 18:49:52,630 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:49:52,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:49:52,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:49:52,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:49:52,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:52" (1/1) ... [2021-11-13 18:49:52,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:52" (1/1) ... [2021-11-13 18:49:52,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:52" (1/1) ... [2021-11-13 18:49:52,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:52" (1/1) ... [2021-11-13 18:49:52,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:52" (1/1) ... [2021-11-13 18:49:52,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:52" (1/1) ... [2021-11-13 18:49:52,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:52" (1/1) ... [2021-11-13 18:49:52,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:49:52,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:49:52,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:49:52,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:49:52,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:52" (1/1) ... [2021-11-13 18:49:52,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:49:52,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:52,797 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:49:52,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:49:52,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 18:49:52,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 18:49:52,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 18:49:52,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-13 18:49:52,843 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 18:49:52,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 18:49:52,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-13 18:49:52,844 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-13 18:49:52,844 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 18:49:52,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 18:49:52,844 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-13 18:49:52,845 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-13 18:49:52,845 INFO L130 BoogieDeclarations]: Found specification of procedure strlcat [2021-11-13 18:49:52,845 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcat [2021-11-13 18:49:52,845 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 18:49:52,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 18:49:52,846 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-13 18:49:52,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-13 18:49:52,846 INFO L130 BoogieDeclarations]: Found specification of procedure usb_acecad_disconnect [2021-11-13 18:49:52,846 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_acecad_disconnect [2021-11-13 18:49:52,846 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-13 18:49:52,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-13 18:49:52,847 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 18:49:52,847 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 18:49:52,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:49:52,847 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-13 18:49:52,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-13 18:49:52,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:49:52,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:49:52,848 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_abs_params [2021-11-13 18:49:52,848 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_abs_params [2021-11-13 18:49:52,848 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-13 18:49:52,849 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-13 18:49:52,849 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_7 [2021-11-13 18:49:52,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_7 [2021-11-13 18:49:52,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:49:52,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 18:49:52,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-13 18:49:52,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:49:52,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 18:49:52,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 18:49:52,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-13 18:49:52,851 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-13 18:49:52,851 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-13 18:49:52,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 18:49:52,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-13 18:49:52,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-13 18:49:52,851 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-13 18:49:52,852 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-13 18:49:52,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:49:52,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:49:53,330 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 18:49:55,267 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:49:55,267 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 18:49:55,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:49:55 BoogieIcfgContainer [2021-11-13 18:49:55,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:49:55,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:49:55,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:49:55,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:49:55,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:49:51" (1/3) ... [2021-11-13 18:49:55,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aed1e87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:49:55, skipping insertion in model container [2021-11-13 18:49:55,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:52" (2/3) ... [2021-11-13 18:49:55,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aed1e87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:49:55, skipping insertion in model container [2021-11-13 18:49:55,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:49:55" (3/3) ... [2021-11-13 18:49:55,277 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-13 18:49:55,282 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:49:55,283 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:49:55,330 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:49:55,338 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 18:49:55,343 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:49:55,370 INFO L276 IsEmpty]: Start isEmpty. Operand has 231 states, 171 states have (on average 1.3099415204678362) internal successors, (224), 183 states have internal predecessors, (224), 43 states have call successors, (43), 16 states have call predecessors, (43), 15 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-11-13 18:49:55,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-13 18:49:55,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:55,379 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] [2021-11-13 18:49:55,379 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:55,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:55,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1798989029, now seen corresponding path program 1 times [2021-11-13 18:49:55,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:49:55,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [347754285] [2021-11-13 18:49:55,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:55,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:49:55,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:49:55,397 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:49:55,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 18:49:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:55,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 18:49:55,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:55,856 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 18:49:55,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:55,989 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 18:49:55,990 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:49:55,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [347754285] [2021-11-13 18:49:55,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [347754285] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:55,991 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:55,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 18:49:55,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230738281] [2021-11-13 18:49:55,994 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:55,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:49:55,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:49:56,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:49:56,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:49:56,034 INFO L87 Difference]: Start difference. First operand has 231 states, 171 states have (on average 1.3099415204678362) internal successors, (224), 183 states have internal predecessors, (224), 43 states have call successors, (43), 16 states have call predecessors, (43), 15 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:49:56,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:56,084 INFO L93 Difference]: Finished difference Result 457 states and 617 transitions. [2021-11-13 18:49:56,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:49:56,086 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-11-13 18:49:56,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:56,097 INFO L225 Difference]: With dead ends: 457 [2021-11-13 18:49:56,098 INFO L226 Difference]: Without dead ends: 220 [2021-11-13 18:49:56,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:49:56,108 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.10ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:56,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 3.10ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:49:56,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-13 18:49:56,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2021-11-13 18:49:56,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 166 states have (on average 1.2771084337349397) internal successors, (212), 172 states have internal predecessors, (212), 39 states have call successors, (39), 15 states have call predecessors, (39), 14 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-13 18:49:56,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 285 transitions. [2021-11-13 18:49:56,191 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 285 transitions. Word has length 32 [2021-11-13 18:49:56,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:56,191 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 285 transitions. [2021-11-13 18:49:56,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:49:56,192 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 285 transitions. [2021-11-13 18:49:56,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-13 18:49:56,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:56,194 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] [2021-11-13 18:49:56,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-13 18:49:56,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:49:56,400 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:56,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:56,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1376287203, now seen corresponding path program 1 times [2021-11-13 18:49:56,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:49:56,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235579143] [2021-11-13 18:49:56,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:56,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:49:56,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:49:56,404 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:49:56,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 18:49:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:56,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:49:56,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:56,842 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 18:49:56,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:56,952 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 18:49:56,952 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:49:56,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235579143] [2021-11-13 18:49:56,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235579143] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:56,953 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:56,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:49:56,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894602042] [2021-11-13 18:49:56,953 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:56,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:49:56,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:49:56,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:49:56,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:49:56,958 INFO L87 Difference]: Start difference. First operand 220 states and 285 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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 18:49:57,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:57,780 INFO L93 Difference]: Finished difference Result 802 states and 1046 transitions. [2021-11-13 18:49:57,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:49:57,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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 32 [2021-11-13 18:49:57,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:57,787 INFO L225 Difference]: With dead ends: 802 [2021-11-13 18:49:57,788 INFO L226 Difference]: Without dead ends: 587 [2021-11-13 18:49:57,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 60 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 18:49:57,796 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 682 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 636.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.45ms SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 744.25ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:57,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 777 Invalid, 162 Unknown, 0 Unchecked, 9.45ms Time], IncrementalHoareTripleChecker [72 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 744.25ms Time] [2021-11-13 18:49:57,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-11-13 18:49:57,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 587. [2021-11-13 18:49:57,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 445 states have (on average 1.2719101123595506) internal successors, (566), 455 states have internal predecessors, (566), 101 states have call successors, (101), 41 states have call predecessors, (101), 40 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-13 18:49:57,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 763 transitions. [2021-11-13 18:49:57,894 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 763 transitions. Word has length 32 [2021-11-13 18:49:57,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:57,895 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 763 transitions. [2021-11-13 18:49:57,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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 18:49:57,896 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 763 transitions. [2021-11-13 18:49:57,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-13 18:49:57,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:57,904 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:57,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-13 18:49:58,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:49:58,120 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:58,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:58,121 INFO L85 PathProgramCache]: Analyzing trace with hash 451634024, now seen corresponding path program 1 times [2021-11-13 18:49:58,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:49:58,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285369830] [2021-11-13 18:49:58,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:58,122 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:49:58,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:49:58,123 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:49:58,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 18:49:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:58,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:49:58,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:49:58,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:49:58,730 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:49:58,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285369830] [2021-11-13 18:49:58,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285369830] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:58,730 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:58,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-13 18:49:58,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439287769] [2021-11-13 18:49:58,731 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:58,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:49:58,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:49:58,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:49:58,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:49:58,734 INFO L87 Difference]: Start difference. First operand 587 states and 763 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:49:59,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:59,069 INFO L93 Difference]: Finished difference Result 1434 states and 1917 transitions. [2021-11-13 18:49:59,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:49:59,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2021-11-13 18:49:59,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:59,083 INFO L225 Difference]: With dead ends: 1434 [2021-11-13 18:49:59,083 INFO L226 Difference]: Without dead ends: 862 [2021-11-13 18:49:59,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:49:59,092 INFO L933 BasicCegarLoop]: 453 mSDtfsCounter, 620 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 181.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.56ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 215.08ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:59,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 1111 Invalid, 104 Unknown, 0 Unchecked, 10.56ms Time], IncrementalHoareTripleChecker [61 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 215.08ms Time] [2021-11-13 18:49:59,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-11-13 18:49:59,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 590. [2021-11-13 18:49:59,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 448 states have (on average 1.2678571428571428) internal successors, (568), 458 states have internal predecessors, (568), 101 states have call successors, (101), 41 states have call predecessors, (101), 40 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-13 18:49:59,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 765 transitions. [2021-11-13 18:49:59,171 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 765 transitions. Word has length 55 [2021-11-13 18:49:59,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:59,172 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 765 transitions. [2021-11-13 18:49:59,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:49:59,173 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 765 transitions. [2021-11-13 18:49:59,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-13 18:49:59,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:59,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:59,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:59,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:49:59,393 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:59,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:59,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1188950696, now seen corresponding path program 1 times [2021-11-13 18:49:59,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:49:59,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160444921] [2021-11-13 18:49:59,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:59,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:49:59,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:49:59,396 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:49:59,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 18:49:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:59,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:49:59,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:50:00,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:50:00,483 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:00,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160444921] [2021-11-13 18:50:00,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160444921] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:50:00,488 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:50:00,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-13 18:50:00,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664702754] [2021-11-13 18:50:00,489 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:00,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:50:00,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:00,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:50:00,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:50:00,497 INFO L87 Difference]: Start difference. First operand 590 states and 765 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:50:00,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:00,695 INFO L93 Difference]: Finished difference Result 1741 states and 2269 transitions. [2021-11-13 18:50:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:50:00,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 55 [2021-11-13 18:50:00,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:00,705 INFO L225 Difference]: With dead ends: 1741 [2021-11-13 18:50:00,705 INFO L226 Difference]: Without dead ends: 1166 [2021-11-13 18:50:00,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 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 18:50:00,708 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 264 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.65ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 99.36ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:00,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 843 Invalid, 31 Unknown, 0 Unchecked, 4.65ms Time], IncrementalHoareTripleChecker [9 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 99.36ms Time] [2021-11-13 18:50:00,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-11-13 18:50:00,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 1154. [2021-11-13 18:50:00,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 881 states have (on average 1.264472190692395) internal successors, (1114), 897 states have internal predecessors, (1114), 194 states have call successors, (194), 79 states have call predecessors, (194), 78 states have return successors, (192), 189 states have call predecessors, (192), 189 states have call successors, (192) [2021-11-13 18:50:00,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1500 transitions. [2021-11-13 18:50:00,808 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1500 transitions. Word has length 55 [2021-11-13 18:50:00,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:00,809 INFO L470 AbstractCegarLoop]: Abstraction has 1154 states and 1500 transitions. [2021-11-13 18:50:00,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:50:00,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1500 transitions. [2021-11-13 18:50:00,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-13 18:50:00,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:00,811 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:00,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:01,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:01,031 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:01,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:01,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1797229676, now seen corresponding path program 1 times [2021-11-13 18:50:01,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:01,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900905888] [2021-11-13 18:50:01,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:01,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:01,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:01,033 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:01,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 18:50:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:01,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:50:01,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:50:01,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:50:02,078 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:02,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900905888] [2021-11-13 18:50:02,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900905888] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:50:02,078 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:50:02,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-13 18:50:02,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541377665] [2021-11-13 18:50:02,078 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:02,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:50:02,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:02,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:50:02,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:50:02,080 INFO L87 Difference]: Start difference. First operand 1154 states and 1500 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:50:02,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:02,329 INFO L93 Difference]: Finished difference Result 1156 states and 1501 transitions. [2021-11-13 18:50:02,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:50:02,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 56 [2021-11-13 18:50:02,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:02,338 INFO L225 Difference]: With dead ends: 1156 [2021-11-13 18:50:02,338 INFO L226 Difference]: Without dead ends: 1153 [2021-11-13 18:50:02,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 108 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 18:50:02,339 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 431 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 111.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.67ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 142.56ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:02,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 282 Invalid, 71 Unknown, 0 Unchecked, 2.67ms Time], IncrementalHoareTripleChecker [70 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 142.56ms Time] [2021-11-13 18:50:02,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-11-13 18:50:02,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1153. [2021-11-13 18:50:02,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 881 states have (on average 1.2633371169125993) internal successors, (1113), 896 states have internal predecessors, (1113), 193 states have call successors, (193), 79 states have call predecessors, (193), 78 states have return successors, (192), 189 states have call predecessors, (192), 189 states have call successors, (192) [2021-11-13 18:50:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1498 transitions. [2021-11-13 18:50:02,438 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1498 transitions. Word has length 56 [2021-11-13 18:50:02,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:02,439 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 1498 transitions. [2021-11-13 18:50:02,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:50:02,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1498 transitions. [2021-11-13 18:50:02,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 18:50:02,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:02,441 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:02,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:02,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:02,658 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:02,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:02,658 INFO L85 PathProgramCache]: Analyzing trace with hash 120464171, now seen corresponding path program 1 times [2021-11-13 18:50:02,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:02,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446656995] [2021-11-13 18:50:02,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:02,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:02,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:02,660 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:02,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 18:50:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:02,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:50:02,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:50:03,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:50:03,374 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:03,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446656995] [2021-11-13 18:50:03,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446656995] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:50:03,374 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:50:03,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 18:50:03,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167163924] [2021-11-13 18:50:03,375 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:03,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:50:03,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:03,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:50:03,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:50:03,377 INFO L87 Difference]: Start difference. First operand 1153 states and 1498 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:50:03,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:03,478 INFO L93 Difference]: Finished difference Result 1155 states and 1499 transitions. [2021-11-13 18:50:03,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:50:03,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 57 [2021-11-13 18:50:03,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:03,488 INFO L225 Difference]: With dead ends: 1155 [2021-11-13 18:50:03,488 INFO L226 Difference]: Without dead ends: 1152 [2021-11-13 18:50:03,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 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 18:50:03,489 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 240 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.92ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.12ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:03,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 280 Invalid, 1 Unknown, 0 Unchecked, 1.92ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 1.12ms Time] [2021-11-13 18:50:03,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2021-11-13 18:50:03,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1152. [2021-11-13 18:50:03,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 881 states have (on average 1.2622020431328036) internal successors, (1112), 895 states have internal predecessors, (1112), 192 states have call successors, (192), 79 states have call predecessors, (192), 78 states have return successors, (192), 189 states have call predecessors, (192), 189 states have call successors, (192) [2021-11-13 18:50:03,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1496 transitions. [2021-11-13 18:50:03,588 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1496 transitions. Word has length 57 [2021-11-13 18:50:03,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:03,588 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 1496 transitions. [2021-11-13 18:50:03,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:50:03,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1496 transitions. [2021-11-13 18:50:03,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 18:50:03,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:03,590 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:03,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:03,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:03,805 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:03,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:03,805 INFO L85 PathProgramCache]: Analyzing trace with hash -560563849, now seen corresponding path program 1 times [2021-11-13 18:50:03,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:03,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068522347] [2021-11-13 18:50:03,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:03,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:03,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:03,807 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:03,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 18:50:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:04,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:50:04,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:50:04,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:50:04,497 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:04,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068522347] [2021-11-13 18:50:04,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068522347] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:50:04,497 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:50:04,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 18:50:04,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46087361] [2021-11-13 18:50:04,498 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:04,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:50:04,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:04,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:50:04,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:50:04,499 INFO L87 Difference]: Start difference. First operand 1152 states and 1496 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:50:04,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:04,592 INFO L93 Difference]: Finished difference Result 1154 states and 1497 transitions. [2021-11-13 18:50:04,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:50:04,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 58 [2021-11-13 18:50:04,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:04,601 INFO L225 Difference]: With dead ends: 1154 [2021-11-13 18:50:04,601 INFO L226 Difference]: Without dead ends: 1151 [2021-11-13 18:50:04,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 113 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 18:50:04,602 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 237 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.44ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.23ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:04,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 278 Invalid, 1 Unknown, 0 Unchecked, 1.44ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 1.23ms Time] [2021-11-13 18:50:04,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-11-13 18:50:04,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 1151. [2021-11-13 18:50:04,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 881 states have (on average 1.2610669693530079) internal successors, (1111), 894 states have internal predecessors, (1111), 191 states have call successors, (191), 79 states have call predecessors, (191), 78 states have return successors, (192), 189 states have call predecessors, (192), 189 states have call successors, (192) [2021-11-13 18:50:04,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1494 transitions. [2021-11-13 18:50:04,711 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1494 transitions. Word has length 58 [2021-11-13 18:50:04,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:04,711 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 1494 transitions. [2021-11-13 18:50:04,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:50:04,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1494 transitions. [2021-11-13 18:50:04,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-13 18:50:04,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:04,713 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:04,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:04,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:04,928 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:04,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:04,929 INFO L85 PathProgramCache]: Analyzing trace with hash -197591122, now seen corresponding path program 1 times [2021-11-13 18:50:04,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:04,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290317900] [2021-11-13 18:50:04,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:04,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:04,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:04,930 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:04,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 18:50:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:05,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:50:05,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:50:05,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:05,619 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:50:05,619 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:05,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290317900] [2021-11-13 18:50:05,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290317900] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:50:05,619 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:50:05,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 18:50:05,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860749237] [2021-11-13 18:50:05,620 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:05,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:50:05,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:05,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:50:05,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:50:05,621 INFO L87 Difference]: Start difference. First operand 1151 states and 1494 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:50:05,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:05,708 INFO L93 Difference]: Finished difference Result 1153 states and 1495 transitions. [2021-11-13 18:50:05,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:50:05,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 59 [2021-11-13 18:50:05,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:05,716 INFO L225 Difference]: With dead ends: 1153 [2021-11-13 18:50:05,716 INFO L226 Difference]: Without dead ends: 1141 [2021-11-13 18:50:05,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 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 18:50:05,720 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 234 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.32ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:05,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 1.32ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:50:05,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2021-11-13 18:50:05,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1141. [2021-11-13 18:50:05,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 872 states have (on average 1.260321100917431) internal successors, (1099), 884 states have internal predecessors, (1099), 190 states have call successors, (190), 79 states have call predecessors, (190), 78 states have return successors, (192), 189 states have call predecessors, (192), 189 states have call successors, (192) [2021-11-13 18:50:05,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1481 transitions. [2021-11-13 18:50:05,819 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1481 transitions. Word has length 59 [2021-11-13 18:50:05,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:05,821 INFO L470 AbstractCegarLoop]: Abstraction has 1141 states and 1481 transitions. [2021-11-13 18:50:05,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:50:05,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1481 transitions. [2021-11-13 18:50:05,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-13 18:50:05,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:05,829 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:05,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:06,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:06,047 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:06,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:06,048 INFO L85 PathProgramCache]: Analyzing trace with hash 415459010, now seen corresponding path program 1 times [2021-11-13 18:50:06,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:06,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600511266] [2021-11-13 18:50:06,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:06,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:06,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:06,050 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:06,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 18:50:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:06,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:50:06,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-13 18:50:06,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 18:50:07,319 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:07,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600511266] [2021-11-13 18:50:07,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600511266] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:50:07,319 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:50:07,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:50:07,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449321071] [2021-11-13 18:50:07,320 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:07,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:50:07,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:07,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:50:07,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:50:07,322 INFO L87 Difference]: Start difference. First operand 1141 states and 1481 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-13 18:50:07,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:07,494 INFO L93 Difference]: Finished difference Result 2357 states and 3073 transitions. [2021-11-13 18:50:07,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:50:07,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 159 [2021-11-13 18:50:07,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:07,502 INFO L225 Difference]: With dead ends: 2357 [2021-11-13 18:50:07,503 INFO L226 Difference]: Without dead ends: 1231 [2021-11-13 18:50:07,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 315 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 18:50:07,507 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 41 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.23ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.55ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:07,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 533 Invalid, 12 Unknown, 0 Unchecked, 2.23ms Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 69.55ms Time] [2021-11-13 18:50:07,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2021-11-13 18:50:07,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1208. [2021-11-13 18:50:07,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 938 states have (on average 1.2707889125799574) internal successors, (1192), 950 states have internal predecessors, (1192), 190 states have call successors, (190), 80 states have call predecessors, (190), 79 states have return successors, (192), 189 states have call predecessors, (192), 189 states have call successors, (192) [2021-11-13 18:50:07,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1574 transitions. [2021-11-13 18:50:07,654 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1574 transitions. Word has length 159 [2021-11-13 18:50:07,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:07,655 INFO L470 AbstractCegarLoop]: Abstraction has 1208 states and 1574 transitions. [2021-11-13 18:50:07,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-13 18:50:07,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1574 transitions. [2021-11-13 18:50:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-13 18:50:07,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:07,662 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:07,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:07,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:07,878 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:07,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:07,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1466528889, now seen corresponding path program 1 times [2021-11-13 18:50:07,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:07,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189440136] [2021-11-13 18:50:07,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:07,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:07,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:07,881 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:07,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 18:50:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:08,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:50:08,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-13 18:50:08,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:09,330 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-13 18:50:09,330 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:09,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189440136] [2021-11-13 18:50:09,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189440136] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:09,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:50:09,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-13 18:50:09,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411284947] [2021-11-13 18:50:09,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:09,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:50:09,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:09,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:50:09,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:50:09,333 INFO L87 Difference]: Start difference. First operand 1208 states and 1574 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 18:50:09,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:09,466 INFO L93 Difference]: Finished difference Result 2421 states and 3171 transitions. [2021-11-13 18:50:09,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:50:09,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 168 [2021-11-13 18:50:09,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:09,475 INFO L225 Difference]: With dead ends: 2421 [2021-11-13 18:50:09,475 INFO L226 Difference]: Without dead ends: 1220 [2021-11-13 18:50:09,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:50:09,479 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 0 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.88ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.05ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:09,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1082 Invalid, 9 Unknown, 0 Unchecked, 3.88ms Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 22.05ms Time] [2021-11-13 18:50:09,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-11-13 18:50:09,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1220. [2021-11-13 18:50:09,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 944 states have (on average 1.2690677966101696) internal successors, (1198), 962 states have internal predecessors, (1198), 190 states have call successors, (190), 80 states have call predecessors, (190), 85 states have return successors, (210), 189 states have call predecessors, (210), 189 states have call successors, (210) [2021-11-13 18:50:09,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1598 transitions. [2021-11-13 18:50:09,584 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1598 transitions. Word has length 168 [2021-11-13 18:50:09,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:09,584 INFO L470 AbstractCegarLoop]: Abstraction has 1220 states and 1598 transitions. [2021-11-13 18:50:09,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 18:50:09,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1598 transitions. [2021-11-13 18:50:09,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-13 18:50:09,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:09,590 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:09,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:09,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:09,811 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:09,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:09,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1167905577, now seen corresponding path program 1 times [2021-11-13 18:50:09,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:09,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192554450] [2021-11-13 18:50:09,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:09,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:09,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:09,814 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:09,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 18:50:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:10,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:50:10,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-13 18:50:10,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:11,085 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-13 18:50:11,085 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:11,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192554450] [2021-11-13 18:50:11,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192554450] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:50:11,086 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:50:11,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-13 18:50:11,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636754065] [2021-11-13 18:50:11,087 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:11,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:50:11,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:11,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:50:11,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:50:11,089 INFO L87 Difference]: Start difference. First operand 1220 states and 1598 transitions. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-13 18:50:11,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:11,306 INFO L93 Difference]: Finished difference Result 3192 states and 4302 transitions. [2021-11-13 18:50:11,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:50:11,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 174 [2021-11-13 18:50:11,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:11,320 INFO L225 Difference]: With dead ends: 3192 [2021-11-13 18:50:11,320 INFO L226 Difference]: Without dead ends: 1991 [2021-11-13 18:50:11,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:50:11,325 INFO L933 BasicCegarLoop]: 342 mSDtfsCounter, 333 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.55ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.21ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:11,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 1332 Invalid, 30 Unknown, 0 Unchecked, 4.55ms Time], IncrementalHoareTripleChecker [14 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 61.21ms Time] [2021-11-13 18:50:11,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2021-11-13 18:50:11,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1238. [2021-11-13 18:50:11,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 962 states have (on average 1.264033264033264) internal successors, (1216), 980 states have internal predecessors, (1216), 190 states have call successors, (190), 80 states have call predecessors, (190), 85 states have return successors, (210), 189 states have call predecessors, (210), 189 states have call successors, (210) [2021-11-13 18:50:11,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 1616 transitions. [2021-11-13 18:50:11,455 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 1616 transitions. Word has length 174 [2021-11-13 18:50:11,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:11,456 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 1616 transitions. [2021-11-13 18:50:11,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-13 18:50:11,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 1616 transitions. [2021-11-13 18:50:11,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-13 18:50:11,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:11,462 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:11,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:11,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:11,676 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:11,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:11,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1428729328, now seen corresponding path program 1 times [2021-11-13 18:50:11,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:11,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979133795] [2021-11-13 18:50:11,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:11,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:11,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:11,679 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:11,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 18:50:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:12,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 18:50:12,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-13 18:50:12,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 18:50:13,831 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:13,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979133795] [2021-11-13 18:50:13,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979133795] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:13,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:50:13,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 18 [2021-11-13 18:50:13,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976425006] [2021-11-13 18:50:13,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:13,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:50:13,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:13,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:50:13,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:50:13,835 INFO L87 Difference]: Start difference. First operand 1238 states and 1616 transitions. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 8 states have internal predecessors, (115), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-13 18:50:15,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:15,161 INFO L93 Difference]: Finished difference Result 3213 states and 4313 transitions. [2021-11-13 18:50:15,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:50:15,162 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 8 states have internal predecessors, (115), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 176 [2021-11-13 18:50:15,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:15,176 INFO L225 Difference]: With dead ends: 3213 [2021-11-13 18:50:15,176 INFO L226 Difference]: Without dead ends: 1994 [2021-11-13 18:50:15,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:50:15,181 INFO L933 BasicCegarLoop]: 384 mSDtfsCounter, 203 mSDsluCounter, 2945 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 957.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 3329 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.87ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 999.11ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:15,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 3329 Invalid, 82 Unknown, 0 Unchecked, 10.87ms Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 999.11ms Time] [2021-11-13 18:50:15,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2021-11-13 18:50:15,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1286. [2021-11-13 18:50:15,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1004 states have (on average 1.252988047808765) internal successors, (1258), 1016 states have internal predecessors, (1258), 190 states have call successors, (190), 80 states have call predecessors, (190), 91 states have return successors, (222), 201 states have call predecessors, (222), 189 states have call successors, (222) [2021-11-13 18:50:15,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 1670 transitions. [2021-11-13 18:50:15,362 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 1670 transitions. Word has length 176 [2021-11-13 18:50:15,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:15,362 INFO L470 AbstractCegarLoop]: Abstraction has 1286 states and 1670 transitions. [2021-11-13 18:50:15,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 8 states have internal predecessors, (115), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-13 18:50:15,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 1670 transitions. [2021-11-13 18:50:15,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-13 18:50:15,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:15,369 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 18:50:15,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:15,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:15,591 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:15,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:15,591 INFO L85 PathProgramCache]: Analyzing trace with hash 47100754, now seen corresponding path program 2 times [2021-11-13 18:50:15,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:15,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243707212] [2021-11-13 18:50:15,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:50:15,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:15,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:15,594 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:15,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 18:50:15,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-13 18:50:15,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:50:15,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 18:50:15,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 18:50:16,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:16,725 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 18:50:16,725 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:16,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243707212] [2021-11-13 18:50:16,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243707212] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:50:16,726 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:50:16,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-13 18:50:16,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903546008] [2021-11-13 18:50:16,726 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:16,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:50:16,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:16,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:50:16,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:50:16,728 INFO L87 Difference]: Start difference. First operand 1286 states and 1670 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 18:50:18,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:18,273 INFO L93 Difference]: Finished difference Result 2812 states and 3702 transitions. [2021-11-13 18:50:18,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:50:18,275 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 182 [2021-11-13 18:50:18,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:18,286 INFO L225 Difference]: With dead ends: 2812 [2021-11-13 18:50:18,286 INFO L226 Difference]: Without dead ends: 1545 [2021-11-13 18:50:18,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:50:18,291 INFO L933 BasicCegarLoop]: 509 mSDtfsCounter, 697 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1000.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 2096 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.92ms SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1132.29ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:18,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 2096 Invalid, 191 Unknown, 0 Unchecked, 9.92ms Time], IncrementalHoareTripleChecker [104 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 1132.29ms Time] [2021-11-13 18:50:18,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2021-11-13 18:50:18,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1286. [2021-11-13 18:50:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1004 states have (on average 1.25) internal successors, (1255), 1016 states have internal predecessors, (1255), 190 states have call successors, (190), 80 states have call predecessors, (190), 91 states have return successors, (222), 201 states have call predecessors, (222), 189 states have call successors, (222) [2021-11-13 18:50:18,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 1667 transitions. [2021-11-13 18:50:18,424 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 1667 transitions. Word has length 182 [2021-11-13 18:50:18,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:18,425 INFO L470 AbstractCegarLoop]: Abstraction has 1286 states and 1667 transitions. [2021-11-13 18:50:18,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 18:50:18,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 1667 transitions. [2021-11-13 18:50:18,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-13 18:50:18,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:18,432 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:18,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:18,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:18,648 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:18,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:18,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2111774586, now seen corresponding path program 1 times [2021-11-13 18:50:18,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:18,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431623516] [2021-11-13 18:50:18,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:18,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:18,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:18,650 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:18,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 18:50:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:19,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 18:50:19,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 33 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-13 18:50:19,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:20,726 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-13 18:50:20,727 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:20,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431623516] [2021-11-13 18:50:20,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431623516] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:50:20,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:50:20,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-13 18:50:20,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176520633] [2021-11-13 18:50:20,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:20,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 18:50:20,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:20,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 18:50:20,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:50:20,729 INFO L87 Difference]: Start difference. First operand 1286 states and 1667 transitions. Second operand has 16 states, 16 states have (on average 9.4375) internal successors, (151), 12 states have internal predecessors, (151), 4 states have call successors, (23), 2 states have call predecessors, (23), 6 states have return successors, (25), 8 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-13 18:50:22,391 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:50:23,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:23,647 INFO L93 Difference]: Finished difference Result 2862 states and 3760 transitions. [2021-11-13 18:50:23,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:50:23,653 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.4375) internal successors, (151), 12 states have internal predecessors, (151), 4 states have call successors, (23), 2 states have call predecessors, (23), 6 states have return successors, (25), 8 states have call predecessors, (25), 4 states have call successors, (25) Word has length 201 [2021-11-13 18:50:23,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:23,663 INFO L225 Difference]: With dead ends: 2862 [2021-11-13 18:50:23,663 INFO L226 Difference]: Without dead ends: 1595 [2021-11-13 18:50:23,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:50:23,667 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 64 mSDsluCounter, 3469 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2594.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 3798 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.44ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2671.91ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:23,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 3798 Invalid, 95 Unknown, 0 Unchecked, 9.44ms Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 2671.91ms Time] [2021-11-13 18:50:23,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2021-11-13 18:50:23,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1298. [2021-11-13 18:50:23,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1010 states have (on average 1.2485148514851485) internal successors, (1261), 1022 states have internal predecessors, (1261), 196 states have call successors, (196), 80 states have call predecessors, (196), 91 states have return successors, (234), 207 states have call predecessors, (234), 195 states have call successors, (234) [2021-11-13 18:50:23,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1691 transitions. [2021-11-13 18:50:23,797 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1691 transitions. Word has length 201 [2021-11-13 18:50:23,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:23,797 INFO L470 AbstractCegarLoop]: Abstraction has 1298 states and 1691 transitions. [2021-11-13 18:50:23,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.4375) internal successors, (151), 12 states have internal predecessors, (151), 4 states have call successors, (23), 2 states have call predecessors, (23), 6 states have return successors, (25), 8 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-13 18:50:23,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1691 transitions. [2021-11-13 18:50:23,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-13 18:50:23,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:23,805 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:23,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:24,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:24,020 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:24,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:24,020 INFO L85 PathProgramCache]: Analyzing trace with hash -793259544, now seen corresponding path program 2 times [2021-11-13 18:50:24,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:24,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154145508] [2021-11-13 18:50:24,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:50:24,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:24,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:24,023 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:24,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 18:50:27,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:50:27,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:50:27,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:50:27,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-13 18:50:27,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-13 18:50:28,459 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:28,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154145508] [2021-11-13 18:50:28,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154145508] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:50:28,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:50:28,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-13 18:50:28,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824283784] [2021-11-13 18:50:28,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:28,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:50:28,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:28,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:50:28,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:50:28,462 INFO L87 Difference]: Start difference. First operand 1298 states and 1691 transitions. Second operand has 6 states, 6 states have (on average 40.166666666666664) internal successors, (241), 6 states have internal predecessors, (241), 4 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-13 18:50:30,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:30,735 INFO L93 Difference]: Finished difference Result 7686 states and 10043 transitions. [2021-11-13 18:50:30,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:50:30,736 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 40.166666666666664) internal successors, (241), 6 states have internal predecessors, (241), 4 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) Word has length 207 [2021-11-13 18:50:30,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:30,788 INFO L225 Difference]: With dead ends: 7686 [2021-11-13 18:50:30,788 INFO L226 Difference]: Without dead ends: 7678 [2021-11-13 18:50:30,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:50:30,792 INFO L933 BasicCegarLoop]: 661 mSDtfsCounter, 974 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1529.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 1943 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.07ms SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1749.22ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:30,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [974 Valid, 1943 Invalid, 719 Unknown, 0 Unchecked, 10.07ms Time], IncrementalHoareTripleChecker [117 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 1749.22ms Time] [2021-11-13 18:50:30,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7678 states. [2021-11-13 18:50:31,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7678 to 7602. [2021-11-13 18:50:31,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7602 states, 5914 states have (on average 1.25059181602976) internal successors, (7396), 5998 states have internal predecessors, (7396), 1156 states have call successors, (1156), 460 states have call predecessors, (1156), 531 states have return successors, (1389), 1215 states have call predecessors, (1389), 1155 states have call successors, (1389) [2021-11-13 18:50:31,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7602 states to 7602 states and 9941 transitions. [2021-11-13 18:50:31,647 INFO L78 Accepts]: Start accepts. Automaton has 7602 states and 9941 transitions. Word has length 207 [2021-11-13 18:50:31,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:31,648 INFO L470 AbstractCegarLoop]: Abstraction has 7602 states and 9941 transitions. [2021-11-13 18:50:31,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.166666666666664) internal successors, (241), 6 states have internal predecessors, (241), 4 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-13 18:50:31,649 INFO L276 IsEmpty]: Start isEmpty. Operand 7602 states and 9941 transitions. [2021-11-13 18:50:31,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-13 18:50:31,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:31,672 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:31,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:31,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:31,896 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:31,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:31,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1804376794, now seen corresponding path program 1 times [2021-11-13 18:50:31,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:31,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117653724] [2021-11-13 18:50:31,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:31,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:31,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:31,898 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:31,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 18:50:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:32,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 18:50:32,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 18:50:33,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 18:50:33,546 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:33,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117653724] [2021-11-13 18:50:33,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117653724] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:33,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:50:33,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-13 18:50:33,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117990758] [2021-11-13 18:50:33,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:33,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:50:33,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:33,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:50:33,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:50:33,548 INFO L87 Difference]: Start difference. First operand 7602 states and 9941 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 18:50:34,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:34,557 INFO L93 Difference]: Finished difference Result 18362 states and 24552 transitions. [2021-11-13 18:50:34,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:50:34,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 207 [2021-11-13 18:50:34,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:34,610 INFO L225 Difference]: With dead ends: 18362 [2021-11-13 18:50:34,610 INFO L226 Difference]: Without dead ends: 10779 [2021-11-13 18:50:34,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:50:34,628 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 92 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 1824 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.36ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.87ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:34,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 1824 Invalid, 23 Unknown, 0 Unchecked, 4.36ms Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 81.87ms Time] [2021-11-13 18:50:34,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10779 states. [2021-11-13 18:50:35,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10779 to 7710. [2021-11-13 18:50:35,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7710 states, 6022 states have (on average 1.2460976419794088) internal successors, (7504), 6070 states have internal predecessors, (7504), 1156 states have call successors, (1156), 460 states have call predecessors, (1156), 531 states have return successors, (1389), 1251 states have call predecessors, (1389), 1155 states have call successors, (1389) [2021-11-13 18:50:35,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7710 states to 7710 states and 10049 transitions. [2021-11-13 18:50:35,425 INFO L78 Accepts]: Start accepts. Automaton has 7710 states and 10049 transitions. Word has length 207 [2021-11-13 18:50:35,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:35,426 INFO L470 AbstractCegarLoop]: Abstraction has 7710 states and 10049 transitions. [2021-11-13 18:50:35,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 18:50:35,426 INFO L276 IsEmpty]: Start isEmpty. Operand 7710 states and 10049 transitions. [2021-11-13 18:50:35,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-13 18:50:35,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:35,444 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:35,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:35,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:35,669 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:35,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:35,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1803826936, now seen corresponding path program 2 times [2021-11-13 18:50:35,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:35,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881391150] [2021-11-13 18:50:35,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:50:35,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:35,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:35,671 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:35,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 18:50:36,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-13 18:50:36,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:50:36,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:50:36,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-13 18:50:36,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-13 18:50:36,736 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:36,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881391150] [2021-11-13 18:50:36,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881391150] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:50:36,737 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:50:36,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-13 18:50:36,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889232980] [2021-11-13 18:50:36,737 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:36,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:50:36,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:36,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:50:36,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:50:36,739 INFO L87 Difference]: Start difference. First operand 7710 states and 10049 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-13 18:50:38,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:38,015 INFO L93 Difference]: Finished difference Result 24433 states and 32062 transitions. [2021-11-13 18:50:38,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:50:38,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 213 [2021-11-13 18:50:38,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:38,075 INFO L225 Difference]: With dead ends: 24433 [2021-11-13 18:50:38,075 INFO L226 Difference]: Without dead ends: 16742 [2021-11-13 18:50:38,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 423 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 18:50:38,099 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 329 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.37ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.12ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:38,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 934 Invalid, 18 Unknown, 0 Unchecked, 2.37ms Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 66.12ms Time] [2021-11-13 18:50:38,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16742 states. [2021-11-13 18:50:38,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16742 to 7746. [2021-11-13 18:50:38,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7746 states, 6058 states have (on average 1.2446351931330473) internal successors, (7540), 6118 states have internal predecessors, (7540), 1156 states have call successors, (1156), 460 states have call predecessors, (1156), 531 states have return successors, (1389), 1239 states have call predecessors, (1389), 1155 states have call successors, (1389) [2021-11-13 18:50:38,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7746 states to 7746 states and 10085 transitions. [2021-11-13 18:50:38,873 INFO L78 Accepts]: Start accepts. Automaton has 7746 states and 10085 transitions. Word has length 213 [2021-11-13 18:50:38,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:38,876 INFO L470 AbstractCegarLoop]: Abstraction has 7746 states and 10085 transitions. [2021-11-13 18:50:38,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-13 18:50:38,877 INFO L276 IsEmpty]: Start isEmpty. Operand 7746 states and 10085 transitions. [2021-11-13 18:50:38,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-13 18:50:38,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:38,893 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:38,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-13 18:50:39,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:39,112 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:39,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:39,113 INFO L85 PathProgramCache]: Analyzing trace with hash -806596076, now seen corresponding path program 1 times [2021-11-13 18:50:39,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:39,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [386125554] [2021-11-13 18:50:39,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:39,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:39,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:39,116 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:39,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 18:50:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:40,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:50:40,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:40,427 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-13 18:50:40,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-13 18:50:40,891 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:40,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [386125554] [2021-11-13 18:50:40,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [386125554] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:50:40,892 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:50:40,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 18:50:40,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119631931] [2021-11-13 18:50:40,893 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:40,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:50:40,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:40,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:50:40,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:50:40,894 INFO L87 Difference]: Start difference. First operand 7746 states and 10085 transitions. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 6 states have internal predecessors, (143), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 6 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 18:50:42,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:42,498 INFO L93 Difference]: Finished difference Result 25895 states and 35469 transitions. [2021-11-13 18:50:42,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:50:42,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 6 states have internal predecessors, (143), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 6 states have call predecessors, (22), 4 states have call successors, (22) Word has length 220 [2021-11-13 18:50:42,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:42,559 INFO L225 Difference]: With dead ends: 25895 [2021-11-13 18:50:42,560 INFO L226 Difference]: Without dead ends: 18168 [2021-11-13 18:50:42,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:50:42,582 INFO L933 BasicCegarLoop]: 430 mSDtfsCounter, 292 mSDsluCounter, 1544 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 1974 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.42ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 130.37ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:42,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 1974 Invalid, 43 Unknown, 0 Unchecked, 4.42ms Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 130.37ms Time] [2021-11-13 18:50:42,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18168 states. [2021-11-13 18:50:43,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18168 to 7926. [2021-11-13 18:50:43,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7926 states, 6202 states have (on average 1.2447597549177685) internal successors, (7720), 6226 states have internal predecessors, (7720), 1192 states have call successors, (1192), 460 states have call predecessors, (1192), 531 states have return successors, (1425), 1311 states have call predecessors, (1425), 1191 states have call successors, (1425) [2021-11-13 18:50:43,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7926 states to 7926 states and 10337 transitions. [2021-11-13 18:50:43,511 INFO L78 Accepts]: Start accepts. Automaton has 7926 states and 10337 transitions. Word has length 220 [2021-11-13 18:50:43,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:43,511 INFO L470 AbstractCegarLoop]: Abstraction has 7926 states and 10337 transitions. [2021-11-13 18:50:43,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 6 states have internal predecessors, (143), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 6 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 18:50:43,512 INFO L276 IsEmpty]: Start isEmpty. Operand 7926 states and 10337 transitions. [2021-11-13 18:50:43,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-13 18:50:43,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:43,528 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:43,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:43,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:43,744 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:43,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:43,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1194485454, now seen corresponding path program 1 times [2021-11-13 18:50:43,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:43,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000442999] [2021-11-13 18:50:43,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:43,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:43,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:43,747 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:43,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c2f7dd-13e4-4f26-bdcb-d8f69d97ed99/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 18:50:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:46,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-13 18:50:46,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:46,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 18:50:46,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-13 18:50:47,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-13 18:50:49,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2021-11-13 18:50:49,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-13 18:50:49,738 INFO L354 Elim1Store]: treesize reduction 16, result has 23.8 percent of original size [2021-11-13 18:50:49,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-11-13 18:50:49,782 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-13 18:50:49,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 43 [2021-11-13 18:50:50,650 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-13 18:50:50,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2021-11-13 18:50:56,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-13 18:52:30,108 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-11-13 18:52:30,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 67 [2021-11-13 18:52:42,201 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-13 18:52:42,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 75 [2021-11-13 18:52:44,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 14 [2021-11-13 18:54:14,350 INFO L354 Elim1Store]: treesize reduction 69, result has 34.9 percent of original size [2021-11-13 18:54:14,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 97 treesize of output 124 [2021-11-13 18:54:15,612 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-13 18:54:15,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 110 [2021-11-13 18:54:43,332 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-13 18:54:43,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 121 treesize of output 127 [2021-11-13 18:55:25,741 INFO L354 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2021-11-13 18:55:25,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 47 [2021-11-13 18:55:25,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-11-13 18:56:24,074 INFO L354 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2021-11-13 18:56:24,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 47 [2021-11-13 18:56:24,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-11-13 18:56:24,227 INFO L354 Elim1Store]: treesize reduction 84, result has 11.6 percent of original size [2021-11-13 18:56:24,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 60 [2021-11-13 18:56:24,266 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 18:56:24,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 42