./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/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_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/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 32bit --witnessprinter.graph.data.programhash 78201c5527fd684bbb5ce3426a0df19562cff65b8fe2040ac04671f6137326c6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:08:14,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:08:14,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:08:14,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:08:14,363 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:08:14,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:08:14,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:08:14,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:08:14,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:08:14,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:08:14,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:08:14,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:08:14,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:08:14,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:08:14,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:08:14,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:08:14,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:08:14,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:08:14,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:08:14,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:08:14,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:08:14,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:08:14,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:08:14,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:08:14,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:08:14,425 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:08:14,426 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:08:14,427 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:08:14,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:08:14,431 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:08:14,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:08:14,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:08:14,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:08:14,439 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:08:14,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:08:14,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:08:14,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:08:14,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:08:14,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:08:14,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:08:14,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:08:14,448 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:08:14,515 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:08:14,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:08:14,519 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:08:14,520 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:08:14,529 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:08:14,530 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:08:14,531 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:08:14,531 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:08:14,532 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:08:14,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:08:14,533 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:08:14,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:08:14,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:08:14,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:08:14,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:08:14,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:08:14,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:08:14,536 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:08:14,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:08:14,536 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:08:14,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:08:14,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:08:14,537 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:08:14,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:08:14,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:08:14,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:08:14,539 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:08:14,539 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:08:14,539 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:08:14,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:08:14,542 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:08:14,542 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:08:14,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:08:14,543 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:08:14,543 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_8dff5663-f536-4f20-80b6-5a90dc3d5b52/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78201c5527fd684bbb5ce3426a0df19562cff65b8fe2040ac04671f6137326c6 [2021-11-13 18:08:14,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:08:14,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:08:14,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:08:14,880 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:08:14,881 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:08:14,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c [2021-11-13 18:08:15,012 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/data/0986b2574/65a0cf9f6d704af19ae9273b19468d24/FLAGa46cc1934 [2021-11-13 18:08:15,611 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:08:15,611 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c [2021-11-13 18:08:15,639 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/data/0986b2574/65a0cf9f6d704af19ae9273b19468d24/FLAGa46cc1934 [2021-11-13 18:08:15,908 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/data/0986b2574/65a0cf9f6d704af19ae9273b19468d24 [2021-11-13 18:08:15,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:08:15,913 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:08:15,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:08:15,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:08:15,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:08:15,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:08:15" (1/1) ... [2021-11-13 18:08:15,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54d9df9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:15, skipping insertion in model container [2021-11-13 18:08:15,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:08:15" (1/1) ... [2021-11-13 18:08:15,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:08:16,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:08:16,260 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_8dff5663-f536-4f20-80b6-5a90dc3d5b52/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c[913,926] [2021-11-13 18:08:16,318 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_8dff5663-f536-4f20-80b6-5a90dc3d5b52/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c[5977,5990] [2021-11-13 18:08:16,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:08:16,484 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:08:16,500 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_8dff5663-f536-4f20-80b6-5a90dc3d5b52/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c[913,926] [2021-11-13 18:08:16,529 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_8dff5663-f536-4f20-80b6-5a90dc3d5b52/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c[5977,5990] [2021-11-13 18:08:16,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:08:16,667 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:08:16,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:16 WrapperNode [2021-11-13 18:08:16,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:08:16,671 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:08:16,672 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:08:16,673 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:08:16,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:16" (1/1) ... [2021-11-13 18:08:16,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:16" (1/1) ... [2021-11-13 18:08:16,794 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:08:16,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:08:16,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:08:16,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:08:16,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:16" (1/1) ... [2021-11-13 18:08:16,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:16" (1/1) ... [2021-11-13 18:08:16,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:16" (1/1) ... [2021-11-13 18:08:16,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:16" (1/1) ... [2021-11-13 18:08:16,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:16" (1/1) ... [2021-11-13 18:08:16,887 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:16" (1/1) ... [2021-11-13 18:08:16,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:16" (1/1) ... [2021-11-13 18:08:16,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:08:16,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:08:16,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:08:16,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:08:16,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:16" (1/1) ... [2021-11-13 18:08:16,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:08:16,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:08:16,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:08:17,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:08:17,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:08:17,064 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-13 18:08:17,064 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-13 18:08:17,064 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-11-13 18:08:17,067 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-11-13 18:08:17,067 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-11-13 18:08:17,067 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-11-13 18:08:17,068 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-11-13 18:08:17,068 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-11-13 18:08:17,068 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-11-13 18:08:17,068 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-11-13 18:08:17,069 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-11-13 18:08:17,069 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-11-13 18:08:17,069 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-11-13 18:08:17,069 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-11-13 18:08:17,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:08:17,070 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-11-13 18:08:17,070 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-11-13 18:08:17,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:08:17,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:08:17,071 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-11-13 18:08:17,071 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-11-13 18:08:18,443 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:08:18,456 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-13 18:08:18,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:08:18 BoogieIcfgContainer [2021-11-13 18:08:18,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:08:18,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:08:18,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:08:18,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:08:18,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:08:15" (1/3) ... [2021-11-13 18:08:18,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27f97401 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:08:18, skipping insertion in model container [2021-11-13 18:08:18,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:16" (2/3) ... [2021-11-13 18:08:18,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27f97401 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:08:18, skipping insertion in model container [2021-11-13 18:08:18,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:08:18" (3/3) ... [2021-11-13 18:08:18,470 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.10.cil-2.c [2021-11-13 18:08:18,477 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:08:18,477 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-13 18:08:18,564 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:08:18,573 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 18:08:18,573 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-13 18:08:18,614 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 362 states have (on average 1.6408839779005524) internal successors, (594), 367 states have internal predecessors, (594), 30 states have call successors, (30), 9 states have call predecessors, (30), 9 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-13 18:08:18,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-13 18:08:18,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:18,627 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:08:18,628 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:18,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:18,636 INFO L85 PathProgramCache]: Analyzing trace with hash -664078165, now seen corresponding path program 1 times [2021-11-13 18:08:18,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:18,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927783305] [2021-11-13 18:08:18,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:18,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:18,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:08:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:18,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 18:08:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:18,971 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 18:08:18,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:18,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927783305] [2021-11-13 18:08:18,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927783305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:18,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:18,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:08:18,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699761431] [2021-11-13 18:08:18,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:18,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:08:18,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:19,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:08:19,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:08:19,042 INFO L87 Difference]: Start difference. First operand has 404 states, 362 states have (on average 1.6408839779005524) internal successors, (594), 367 states have internal predecessors, (594), 30 states have call successors, (30), 9 states have call predecessors, (30), 9 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:08:19,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:19,927 INFO L93 Difference]: Finished difference Result 794 states and 1281 transitions. [2021-11-13 18:08:19,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:08:19,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2021-11-13 18:08:19,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:19,961 INFO L225 Difference]: With dead ends: 794 [2021-11-13 18:08:19,962 INFO L226 Difference]: Without dead ends: 403 [2021-11-13 18:08:19,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 18:08:19,986 INFO L933 BasicCegarLoop]: 620 mSDtfsCounter, 347 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 486.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 43.62ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 608.29ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:19,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 1207 Invalid, 308 Unknown, 0 Unchecked, 43.62ms Time], IncrementalHoareTripleChecker [30 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 608.29ms Time] [2021-11-13 18:08:20,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-11-13 18:08:20,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 394. [2021-11-13 18:08:20,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 354 states have (on average 1.5451977401129944) internal successors, (547), 357 states have internal predecessors, (547), 30 states have call successors, (30), 9 states have call predecessors, (30), 8 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-13 18:08:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 605 transitions. [2021-11-13 18:08:20,096 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 605 transitions. Word has length 44 [2021-11-13 18:08:20,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:20,097 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 605 transitions. [2021-11-13 18:08:20,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:08:20,098 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 605 transitions. [2021-11-13 18:08:20,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-13 18:08:20,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:20,108 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:08:20,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:08:20,109 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:20,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:20,110 INFO L85 PathProgramCache]: Analyzing trace with hash 707729133, now seen corresponding path program 1 times [2021-11-13 18:08:20,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:20,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636067655] [2021-11-13 18:08:20,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:20,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:20,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:08:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:20,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 18:08:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:20,253 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 18:08:20,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:20,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636067655] [2021-11-13 18:08:20,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636067655] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:20,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:20,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:08:20,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523674321] [2021-11-13 18:08:20,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:20,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:08:20,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:20,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:08:20,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:08:20,265 INFO L87 Difference]: Start difference. First operand 394 states and 605 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:08:20,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:20,578 INFO L93 Difference]: Finished difference Result 524 states and 788 transitions. [2021-11-13 18:08:20,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:08:20,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-11-13 18:08:20,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:20,584 INFO L225 Difference]: With dead ends: 524 [2021-11-13 18:08:20,585 INFO L226 Difference]: Without dead ends: 462 [2021-11-13 18:08:20,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 18:08:20,588 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 816 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 173.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.03ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 218.13ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:20,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 978 Invalid, 146 Unknown, 0 Unchecked, 12.03ms Time], IncrementalHoareTripleChecker [46 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 218.13ms Time] [2021-11-13 18:08:20,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-13 18:08:20,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 456. [2021-11-13 18:08:20,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 409 states have (on average 1.5183374083129584) internal successors, (621), 413 states have internal predecessors, (621), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (38), 32 states have call predecessors, (38), 32 states have call successors, (38) [2021-11-13 18:08:20,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 693 transitions. [2021-11-13 18:08:20,639 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 693 transitions. Word has length 44 [2021-11-13 18:08:20,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:20,644 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 693 transitions. [2021-11-13 18:08:20,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:08:20,645 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 693 transitions. [2021-11-13 18:08:20,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 18:08:20,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:20,654 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:08:20,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:08:20,654 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:20,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:20,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1229769440, now seen corresponding path program 1 times [2021-11-13 18:08:20,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:20,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924252936] [2021-11-13 18:08:20,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:20,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:20,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:08:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:20,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:08:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:20,839 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 18:08:20,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:20,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924252936] [2021-11-13 18:08:20,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924252936] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:20,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:20,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:08:20,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853873583] [2021-11-13 18:08:20,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:20,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:08:20,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:20,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:08:20,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:08:20,848 INFO L87 Difference]: Start difference. First operand 456 states and 693 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:08:21,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:21,161 INFO L93 Difference]: Finished difference Result 716 states and 1063 transitions. [2021-11-13 18:08:21,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:08:21,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-11-13 18:08:21,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:21,171 INFO L225 Difference]: With dead ends: 716 [2021-11-13 18:08:21,172 INFO L226 Difference]: Without dead ends: 592 [2021-11-13 18:08:21,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 18:08:21,183 INFO L933 BasicCegarLoop]: 616 mSDtfsCounter, 833 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 159.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.97ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 190.32ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:21,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 987 Invalid, 114 Unknown, 0 Unchecked, 11.97ms Time], IncrementalHoareTripleChecker [42 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 190.32ms Time] [2021-11-13 18:08:21,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-13 18:08:21,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 567. [2021-11-13 18:08:21,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 507 states have (on average 1.4792899408284024) internal successors, (750), 512 states have internal predecessors, (750), 42 states have call successors, (42), 15 states have call predecessors, (42), 16 states have return successors, (52), 40 states have call predecessors, (52), 40 states have call successors, (52) [2021-11-13 18:08:21,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 844 transitions. [2021-11-13 18:08:21,272 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 844 transitions. Word has length 45 [2021-11-13 18:08:21,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:21,273 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 844 transitions. [2021-11-13 18:08:21,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:08:21,274 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 844 transitions. [2021-11-13 18:08:21,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 18:08:21,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:21,285 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:08:21,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:08:21,289 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:21,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:21,292 INFO L85 PathProgramCache]: Analyzing trace with hash 54588021, now seen corresponding path program 1 times [2021-11-13 18:08:21,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:21,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175298286] [2021-11-13 18:08:21,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:21,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:21,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:08:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:21,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:08:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:21,396 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 18:08:21,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:21,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175298286] [2021-11-13 18:08:21,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175298286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:21,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:21,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:08:21,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706771549] [2021-11-13 18:08:21,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:21,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:08:21,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:21,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:08:21,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:08:21,399 INFO L87 Difference]: Start difference. First operand 567 states and 844 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:08:22,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:22,014 INFO L93 Difference]: Finished difference Result 1016 states and 1444 transitions. [2021-11-13 18:08:22,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:08:22,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-11-13 18:08:22,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:22,024 INFO L225 Difference]: With dead ends: 1016 [2021-11-13 18:08:22,024 INFO L226 Difference]: Without dead ends: 781 [2021-11-13 18:08:22,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 18:08:22,039 INFO L933 BasicCegarLoop]: 652 mSDtfsCounter, 324 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 417.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.88ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 503.42ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:22,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 1314 Invalid, 336 Unknown, 0 Unchecked, 12.88ms Time], IncrementalHoareTripleChecker [36 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 503.42ms Time] [2021-11-13 18:08:22,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-11-13 18:08:22,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 665. [2021-11-13 18:08:22,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 596 states have (on average 1.4563758389261745) internal successors, (868), 603 states have internal predecessors, (868), 46 states have call successors, (46), 20 states have call predecessors, (46), 21 states have return successors, (54), 42 states have call predecessors, (54), 44 states have call successors, (54) [2021-11-13 18:08:22,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 968 transitions. [2021-11-13 18:08:22,111 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 968 transitions. Word has length 45 [2021-11-13 18:08:22,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:22,111 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 968 transitions. [2021-11-13 18:08:22,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:08:22,112 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 968 transitions. [2021-11-13 18:08:22,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-13 18:08:22,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:22,115 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, 1, 1, 1] [2021-11-13 18:08:22,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:08:22,116 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:22,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:22,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1156464466, now seen corresponding path program 1 times [2021-11-13 18:08:22,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:22,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54837339] [2021-11-13 18:08:22,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:22,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:22,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:08:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:22,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:08:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:22,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-13 18:08:22,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:08:22,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:22,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54837339] [2021-11-13 18:08:22,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54837339] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:22,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:22,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:08:22,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102383091] [2021-11-13 18:08:22,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:22,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:08:22,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:22,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:08:22,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:08:22,249 INFO L87 Difference]: Start difference. First operand 665 states and 968 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:08:22,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:22,815 INFO L93 Difference]: Finished difference Result 1204 states and 1687 transitions. [2021-11-13 18:08:22,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:08:22,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-11-13 18:08:22,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:22,824 INFO L225 Difference]: With dead ends: 1204 [2021-11-13 18:08:22,824 INFO L226 Difference]: Without dead ends: 871 [2021-11-13 18:08:22,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 18:08:22,827 INFO L933 BasicCegarLoop]: 675 mSDtfsCounter, 312 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 383.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.54ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 461.13ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:22,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 1341 Invalid, 372 Unknown, 0 Unchecked, 12.54ms Time], IncrementalHoareTripleChecker [32 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 461.13ms Time] [2021-11-13 18:08:22,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-11-13 18:08:22,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 833. [2021-11-13 18:08:22,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 743 states have (on average 1.4064602960969044) internal successors, (1045), 752 states have internal predecessors, (1045), 58 states have call successors, (58), 27 states have call predecessors, (58), 30 states have return successors, (74), 54 states have call predecessors, (74), 56 states have call successors, (74) [2021-11-13 18:08:22,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1177 transitions. [2021-11-13 18:08:22,914 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1177 transitions. Word has length 62 [2021-11-13 18:08:22,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:22,915 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1177 transitions. [2021-11-13 18:08:22,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:08:22,916 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1177 transitions. [2021-11-13 18:08:22,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 18:08:22,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:22,920 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:08:22,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:08:22,921 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:22,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:22,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1541851731, now seen corresponding path program 1 times [2021-11-13 18:08:22,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:22,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781093281] [2021-11-13 18:08:22,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:22,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:23,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:08:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:23,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:08:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:23,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-13 18:08:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:23,058 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 18:08:23,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:23,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781093281] [2021-11-13 18:08:23,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781093281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:23,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:23,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:08:23,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682011950] [2021-11-13 18:08:23,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:23,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:08:23,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:23,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:08:23,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:08:23,064 INFO L87 Difference]: Start difference. First operand 833 states and 1177 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 18:08:23,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:23,322 INFO L93 Difference]: Finished difference Result 1462 states and 1999 transitions. [2021-11-13 18:08:23,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:08:23,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-11-13 18:08:23,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:23,331 INFO L225 Difference]: With dead ends: 1462 [2021-11-13 18:08:23,332 INFO L226 Difference]: Without dead ends: 1008 [2021-11-13 18:08:23,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 18:08:23,337 INFO L933 BasicCegarLoop]: 621 mSDtfsCounter, 812 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.85ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 161.18ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:23,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [836 Valid, 1000 Invalid, 106 Unknown, 0 Unchecked, 7.85ms Time], IncrementalHoareTripleChecker [39 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 161.18ms Time] [2021-11-13 18:08:23,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-11-13 18:08:23,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 953. [2021-11-13 18:08:23,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 850 states have (on average 1.3776470588235294) internal successors, (1171), 861 states have internal predecessors, (1171), 64 states have call successors, (64), 32 states have call predecessors, (64), 37 states have return successors, (84), 60 states have call predecessors, (84), 62 states have call successors, (84) [2021-11-13 18:08:23,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1319 transitions. [2021-11-13 18:08:23,458 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1319 transitions. Word has length 67 [2021-11-13 18:08:23,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:23,459 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 1319 transitions. [2021-11-13 18:08:23,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 18:08:23,459 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1319 transitions. [2021-11-13 18:08:23,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-13 18:08:23,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:23,463 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 18:08:23,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:08:23,464 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:23,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:23,464 INFO L85 PathProgramCache]: Analyzing trace with hash -14326018, now seen corresponding path program 1 times [2021-11-13 18:08:23,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:23,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147058934] [2021-11-13 18:08:23,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:23,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:23,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:08:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:23,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 18:08:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:23,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-13 18:08:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:08:23,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:23,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147058934] [2021-11-13 18:08:23,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147058934] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:08:23,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320796190] [2021-11-13 18:08:23,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:23,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:08:23,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:08:23,652 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:08:23,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:08:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:23,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:08:23,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:08:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:08:24,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:08:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 18:08:24,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320796190] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:08:24,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:08:24,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-11-13 18:08:24,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975991303] [2021-11-13 18:08:24,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:24,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:08:24,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:24,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:08:24,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:08:24,483 INFO L87 Difference]: Start difference. First operand 953 states and 1319 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:08:24,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:24,711 INFO L93 Difference]: Finished difference Result 1009 states and 1387 transitions. [2021-11-13 18:08:24,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:08:24,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-11-13 18:08:24,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:24,729 INFO L225 Difference]: With dead ends: 1009 [2021-11-13 18:08:24,729 INFO L226 Difference]: Without dead ends: 1006 [2021-11-13 18:08:24,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:08:24,733 INFO L933 BasicCegarLoop]: 633 mSDtfsCounter, 1096 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 102.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.28ms SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 125.95ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:24,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1096 Valid, 700 Invalid, 120 Unknown, 0 Unchecked, 6.28ms Time], IncrementalHoareTripleChecker [111 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 125.95ms Time] [2021-11-13 18:08:24,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-11-13 18:08:24,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 952. [2021-11-13 18:08:24,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 850 states have (on average 1.3752941176470588) internal successors, (1169), 860 states have internal predecessors, (1169), 63 states have call successors, (63), 32 states have call predecessors, (63), 37 states have return successors, (84), 60 states have call predecessors, (84), 62 states have call successors, (84) [2021-11-13 18:08:24,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1316 transitions. [2021-11-13 18:08:24,824 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1316 transitions. Word has length 68 [2021-11-13 18:08:24,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:24,825 INFO L470 AbstractCegarLoop]: Abstraction has 952 states and 1316 transitions. [2021-11-13 18:08:24,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:08:24,825 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1316 transitions. [2021-11-13 18:08:24,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 18:08:24,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:24,829 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 18:08:24,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:08:25,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:08:25,054 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:25,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:25,055 INFO L85 PathProgramCache]: Analyzing trace with hash -445352970, now seen corresponding path program 1 times [2021-11-13 18:08:25,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:25,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123129340] [2021-11-13 18:08:25,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:25,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:25,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:08:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:25,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 18:08:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:25,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-13 18:08:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:08:25,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:25,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123129340] [2021-11-13 18:08:25,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123129340] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:08:25,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782831557] [2021-11-13 18:08:25,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:25,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:08:25,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:08:25,180 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:08:25,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:08:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:25,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:08:25,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:08:25,892 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:08:25,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:08:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 18:08:26,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782831557] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:08:26,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:08:26,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-11-13 18:08:26,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113792364] [2021-11-13 18:08:26,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:08:26,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 18:08:26,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:26,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 18:08:26,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:08:26,079 INFO L87 Difference]: Start difference. First operand 952 states and 1316 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-13 18:08:28,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:28,524 INFO L93 Difference]: Finished difference Result 2652 states and 3536 transitions. [2021-11-13 18:08:28,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-13 18:08:28,525 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-11-13 18:08:28,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:28,543 INFO L225 Difference]: With dead ends: 2652 [2021-11-13 18:08:28,543 INFO L226 Difference]: Without dead ends: 2108 [2021-11-13 18:08:28,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-11-13 18:08:28,549 INFO L933 BasicCegarLoop]: 734 mSDtfsCounter, 1620 mSDsluCounter, 3220 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1246.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1651 SdHoareTripleChecker+Valid, 3954 SdHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.72ms SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1514.69ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:28,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1651 Valid, 3954 Invalid, 2026 Unknown, 0 Unchecked, 40.72ms Time], IncrementalHoareTripleChecker [94 Valid, 1932 Invalid, 0 Unknown, 0 Unchecked, 1514.69ms Time] [2021-11-13 18:08:28,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-11-13 18:08:28,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1341. [2021-11-13 18:08:28,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1200 states have (on average 1.3358333333333334) internal successors, (1603), 1218 states have internal predecessors, (1603), 83 states have call successors, (83), 46 states have call predecessors, (83), 56 states have return successors, (118), 77 states have call predecessors, (118), 82 states have call successors, (118) [2021-11-13 18:08:28,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 1804 transitions. [2021-11-13 18:08:28,711 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 1804 transitions. Word has length 69 [2021-11-13 18:08:28,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:28,711 INFO L470 AbstractCegarLoop]: Abstraction has 1341 states and 1804 transitions. [2021-11-13 18:08:28,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-13 18:08:28,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 1804 transitions. [2021-11-13 18:08:28,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-13 18:08:28,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:28,717 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:08:28,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:08:28,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-13 18:08:28,932 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:28,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:28,933 INFO L85 PathProgramCache]: Analyzing trace with hash -2000679978, now seen corresponding path program 1 times [2021-11-13 18:08:28,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:28,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337416948] [2021-11-13 18:08:28,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:28,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:28,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:08:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:28,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 18:08:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:29,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-13 18:08:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:29,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:08:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 18:08:29,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:29,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337416948] [2021-11-13 18:08:29,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337416948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:08:29,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813836346] [2021-11-13 18:08:29,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:29,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:08:29,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:08:29,044 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:08:29,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:08:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:29,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:08:29,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:08:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 18:08:29,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:08:29,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813836346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:29,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:08:29,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-13 18:08:29,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303140164] [2021-11-13 18:08:29,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:29,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:08:29,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:29,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:08:29,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:08:29,389 INFO L87 Difference]: Start difference. First operand 1341 states and 1804 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-13 18:08:29,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:29,501 INFO L93 Difference]: Finished difference Result 2064 states and 2742 transitions. [2021-11-13 18:08:29,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:08:29,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-11-13 18:08:29,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:29,515 INFO L225 Difference]: With dead ends: 2064 [2021-11-13 18:08:29,516 INFO L226 Difference]: Without dead ends: 1219 [2021-11-13 18:08:29,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:08:29,523 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 566 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.31ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.71ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:29,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 705 Invalid, 8 Unknown, 0 Unchecked, 3.31ms Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 11.71ms Time] [2021-11-13 18:08:29,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-11-13 18:08:29,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1204. [2021-11-13 18:08:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1079 states have (on average 1.33920296570899) internal successors, (1445), 1096 states have internal predecessors, (1445), 75 states have call successors, (75), 40 states have call predecessors, (75), 48 states have return successors, (104), 68 states have call predecessors, (104), 74 states have call successors, (104) [2021-11-13 18:08:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1624 transitions. [2021-11-13 18:08:29,656 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1624 transitions. Word has length 88 [2021-11-13 18:08:29,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:29,656 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 1624 transitions. [2021-11-13 18:08:29,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-13 18:08:29,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1624 transitions. [2021-11-13 18:08:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-13 18:08:29,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:29,662 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:08:29,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:08:29,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:08:29,876 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:29,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:29,876 INFO L85 PathProgramCache]: Analyzing trace with hash 148780141, now seen corresponding path program 1 times [2021-11-13 18:08:29,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:29,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211001718] [2021-11-13 18:08:29,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:29,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:29,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:08:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:29,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 18:08:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:29,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:08:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:29,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-13 18:08:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:29,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 18:08:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:08:29,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:29,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211001718] [2021-11-13 18:08:29,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211001718] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:08:29,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013156803] [2021-11-13 18:08:29,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:29,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:08:29,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:08:30,001 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:08:30,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:08:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:30,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:08:30,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:08:30,381 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:08:30,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:08:30,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013156803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:30,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:08:30,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-13 18:08:30,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768253386] [2021-11-13 18:08:30,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:30,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:08:30,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:30,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:08:30,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:08:30,385 INFO L87 Difference]: Start difference. First operand 1204 states and 1624 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-13 18:08:30,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:30,466 INFO L93 Difference]: Finished difference Result 1473 states and 1965 transitions. [2021-11-13 18:08:30,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:08:30,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-11-13 18:08:30,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:30,470 INFO L225 Difference]: With dead ends: 1473 [2021-11-13 18:08:30,471 INFO L226 Difference]: Without dead ends: 328 [2021-11-13 18:08:30,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:08:30,475 INFO L933 BasicCegarLoop]: 647 mSDtfsCounter, 59 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.42ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.22ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:30,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 1228 Invalid, 9 Unknown, 0 Unchecked, 4.42ms Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 13.22ms Time] [2021-11-13 18:08:30,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-13 18:08:30,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2021-11-13 18:08:30,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.569023569023569) internal successors, (466), 298 states have internal predecessors, (466), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 18:08:30,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 514 transitions. [2021-11-13 18:08:30,500 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 514 transitions. Word has length 103 [2021-11-13 18:08:30,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:30,501 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 514 transitions. [2021-11-13 18:08:30,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-13 18:08:30,502 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 514 transitions. [2021-11-13 18:08:30,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:08:30,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:30,505 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:30,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:08:30,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-13 18:08:30,729 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:30,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:30,730 INFO L85 PathProgramCache]: Analyzing trace with hash -918151462, now seen corresponding path program 1 times [2021-11-13 18:08:30,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:30,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986828596] [2021-11-13 18:08:30,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:30,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:30,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:08:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:30,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:08:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:30,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:08:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:30,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:08:30,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:30,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:08:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:30,906 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 18:08:30,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:30,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986828596] [2021-11-13 18:08:30,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986828596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:30,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:30,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:08:30,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411129894] [2021-11-13 18:08:30,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:30,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:08:30,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:30,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:08:30,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:08:30,911 INFO L87 Difference]: Start difference. First operand 328 states and 514 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:32,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:32,653 INFO L93 Difference]: Finished difference Result 768 states and 1224 transitions. [2021-11-13 18:08:32,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:08:32,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-13 18:08:32,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:32,659 INFO L225 Difference]: With dead ends: 768 [2021-11-13 18:08:32,659 INFO L226 Difference]: Without dead ends: 448 [2021-11-13 18:08:32,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:08:32,662 INFO L933 BasicCegarLoop]: 565 mSDtfsCounter, 879 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1280.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.78ms SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1453.14ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:32,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [901 Valid, 923 Invalid, 655 Unknown, 0 Unchecked, 19.78ms Time], IncrementalHoareTripleChecker [56 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 1453.14ms Time] [2021-11-13 18:08:32,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-11-13 18:08:32,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 328. [2021-11-13 18:08:32,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.5656565656565657) internal successors, (465), 298 states have internal predecessors, (465), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 18:08:32,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 513 transitions. [2021-11-13 18:08:32,714 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 513 transitions. Word has length 156 [2021-11-13 18:08:32,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:32,716 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 513 transitions. [2021-11-13 18:08:32,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:32,717 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 513 transitions. [2021-11-13 18:08:32,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:08:32,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:32,721 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:32,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 18:08:32,721 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:32,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:32,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1445690200, now seen corresponding path program 1 times [2021-11-13 18:08:32,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:32,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031421935] [2021-11-13 18:08:32,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:32,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:32,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:08:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:32,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:08:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:32,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:08:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:32,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:08:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:32,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:08:32,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:32,903 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 18:08:32,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:32,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031421935] [2021-11-13 18:08:32,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031421935] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:32,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:32,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:08:32,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272447760] [2021-11-13 18:08:32,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:32,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:08:32,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:32,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:08:32,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:08:32,910 INFO L87 Difference]: Start difference. First operand 328 states and 513 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:34,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:34,676 INFO L93 Difference]: Finished difference Result 760 states and 1207 transitions. [2021-11-13 18:08:34,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:08:34,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-13 18:08:34,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:34,681 INFO L225 Difference]: With dead ends: 760 [2021-11-13 18:08:34,681 INFO L226 Difference]: Without dead ends: 448 [2021-11-13 18:08:34,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:08:34,684 INFO L933 BasicCegarLoop]: 564 mSDtfsCounter, 870 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1285.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.56ms SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1466.71ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:34,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [892 Valid, 921 Invalid, 654 Unknown, 0 Unchecked, 18.56ms Time], IncrementalHoareTripleChecker [56 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 1466.71ms Time] [2021-11-13 18:08:34,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-11-13 18:08:34,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 328. [2021-11-13 18:08:34,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.5622895622895623) internal successors, (464), 298 states have internal predecessors, (464), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 18:08:34,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 512 transitions. [2021-11-13 18:08:34,728 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 512 transitions. Word has length 156 [2021-11-13 18:08:34,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:34,728 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 512 transitions. [2021-11-13 18:08:34,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:34,729 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 512 transitions. [2021-11-13 18:08:34,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:08:34,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:34,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:34,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 18:08:34,733 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:34,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:34,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1061407274, now seen corresponding path program 1 times [2021-11-13 18:08:34,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:34,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357548466] [2021-11-13 18:08:34,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:34,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:34,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:34,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:08:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:34,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:08:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:34,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:08:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:34,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:08:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:34,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:08:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:34,951 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 18:08:34,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:34,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357548466] [2021-11-13 18:08:34,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357548466] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:34,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:34,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:08:34,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329876306] [2021-11-13 18:08:34,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:34,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:08:34,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:34,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:08:34,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:08:34,956 INFO L87 Difference]: Start difference. First operand 328 states and 512 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:37,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:37,147 INFO L93 Difference]: Finished difference Result 756 states and 1201 transitions. [2021-11-13 18:08:37,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:08:37,148 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-13 18:08:37,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:37,153 INFO L225 Difference]: With dead ends: 756 [2021-11-13 18:08:37,153 INFO L226 Difference]: Without dead ends: 447 [2021-11-13 18:08:37,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:08:37,156 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 863 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1621.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.66ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1863.23ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:37,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 1099 Invalid, 1190 Unknown, 0 Unchecked, 16.66ms Time], IncrementalHoareTripleChecker [62 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 1863.23ms Time] [2021-11-13 18:08:37,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-11-13 18:08:37,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 328. [2021-11-13 18:08:37,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.5589225589225588) internal successors, (463), 298 states have internal predecessors, (463), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 18:08:37,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 511 transitions. [2021-11-13 18:08:37,231 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 511 transitions. Word has length 156 [2021-11-13 18:08:37,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:37,232 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 511 transitions. [2021-11-13 18:08:37,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:37,233 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 511 transitions. [2021-11-13 18:08:37,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:08:37,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:37,236 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:37,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 18:08:37,237 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:37,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:37,238 INFO L85 PathProgramCache]: Analyzing trace with hash 337546328, now seen corresponding path program 1 times [2021-11-13 18:08:37,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:37,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669040524] [2021-11-13 18:08:37,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:37,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:37,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:08:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:37,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:08:37,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:37,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:08:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:37,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:08:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:37,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:08:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:37,454 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 18:08:37,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:37,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669040524] [2021-11-13 18:08:37,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669040524] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:37,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:37,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:08:37,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360270068] [2021-11-13 18:08:37,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:37,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:08:37,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:37,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:08:37,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:08:37,459 INFO L87 Difference]: Start difference. First operand 328 states and 511 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:39,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:39,647 INFO L93 Difference]: Finished difference Result 755 states and 1199 transitions. [2021-11-13 18:08:39,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:08:39,648 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-13 18:08:39,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:39,653 INFO L225 Difference]: With dead ends: 755 [2021-11-13 18:08:39,653 INFO L226 Difference]: Without dead ends: 446 [2021-11-13 18:08:39,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:08:39,656 INFO L933 BasicCegarLoop]: 514 mSDtfsCounter, 943 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1649.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 1318 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.00ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1886.86ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:39,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [961 Valid, 1318 Invalid, 1229 Unknown, 0 Unchecked, 18.00ms Time], IncrementalHoareTripleChecker [68 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 1886.86ms Time] [2021-11-13 18:08:39,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-13 18:08:39,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 328. [2021-11-13 18:08:39,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.5488215488215489) internal successors, (460), 298 states have internal predecessors, (460), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 18:08:39,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 508 transitions. [2021-11-13 18:08:39,701 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 508 transitions. Word has length 156 [2021-11-13 18:08:39,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:39,702 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 508 transitions. [2021-11-13 18:08:39,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:39,702 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 508 transitions. [2021-11-13 18:08:39,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:08:39,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:39,705 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:39,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 18:08:39,706 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:39,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:39,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1279894122, now seen corresponding path program 1 times [2021-11-13 18:08:39,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:39,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503158510] [2021-11-13 18:08:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:39,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:39,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:08:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:39,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:08:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:39,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:08:39,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:39,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:08:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:39,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:08:39,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:39,927 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 18:08:39,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:39,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503158510] [2021-11-13 18:08:39,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503158510] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:39,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:39,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:08:39,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612653236] [2021-11-13 18:08:39,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:39,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:08:39,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:39,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:08:39,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:08:39,931 INFO L87 Difference]: Start difference. First operand 328 states and 508 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:42,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:42,061 INFO L93 Difference]: Finished difference Result 775 states and 1229 transitions. [2021-11-13 18:08:42,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:08:42,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-13 18:08:42,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:42,068 INFO L225 Difference]: With dead ends: 775 [2021-11-13 18:08:42,069 INFO L226 Difference]: Without dead ends: 466 [2021-11-13 18:08:42,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:08:42,074 INFO L933 BasicCegarLoop]: 549 mSDtfsCounter, 1079 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1574.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1097 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.48ms SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1802.03ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:42,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1097 Valid, 1184 Invalid, 1224 Unknown, 0 Unchecked, 16.48ms Time], IncrementalHoareTripleChecker [94 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 1802.03ms Time] [2021-11-13 18:08:42,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-13 18:08:42,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 328. [2021-11-13 18:08:42,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.5454545454545454) internal successors, (459), 298 states have internal predecessors, (459), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 18:08:42,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 507 transitions. [2021-11-13 18:08:42,126 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 507 transitions. Word has length 156 [2021-11-13 18:08:42,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:42,126 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 507 transitions. [2021-11-13 18:08:42,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:42,127 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 507 transitions. [2021-11-13 18:08:42,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:08:42,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:42,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:42,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 18:08:42,131 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:42,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:42,132 INFO L85 PathProgramCache]: Analyzing trace with hash -991074732, now seen corresponding path program 1 times [2021-11-13 18:08:42,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:42,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986172588] [2021-11-13 18:08:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:42,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:42,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:08:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:42,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:08:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:42,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:08:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:42,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:08:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:42,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:08:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:42,350 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 18:08:42,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:42,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986172588] [2021-11-13 18:08:42,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986172588] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:42,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:42,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:08:42,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619532837] [2021-11-13 18:08:42,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:42,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:08:42,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:42,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:08:42,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:08:42,354 INFO L87 Difference]: Start difference. First operand 328 states and 507 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:44,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:44,238 INFO L93 Difference]: Finished difference Result 774 states and 1224 transitions. [2021-11-13 18:08:44,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:08:44,242 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-13 18:08:44,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:44,246 INFO L225 Difference]: With dead ends: 774 [2021-11-13 18:08:44,246 INFO L226 Difference]: Without dead ends: 465 [2021-11-13 18:08:44,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:08:44,249 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 1077 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1339.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.89ms SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1569.80ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:44,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1095 Valid, 1180 Invalid, 1214 Unknown, 0 Unchecked, 13.89ms Time], IncrementalHoareTripleChecker [94 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 1569.80ms Time] [2021-11-13 18:08:44,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-11-13 18:08:44,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 328. [2021-11-13 18:08:44,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.5420875420875422) internal successors, (458), 298 states have internal predecessors, (458), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 18:08:44,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 506 transitions. [2021-11-13 18:08:44,297 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 506 transitions. Word has length 156 [2021-11-13 18:08:44,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:44,297 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 506 transitions. [2021-11-13 18:08:44,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:44,298 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 506 transitions. [2021-11-13 18:08:44,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:08:44,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:44,301 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:44,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 18:08:44,301 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:44,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:44,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1535947306, now seen corresponding path program 1 times [2021-11-13 18:08:44,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:44,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789396022] [2021-11-13 18:08:44,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:44,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:44,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:08:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:44,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:08:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:44,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:08:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:44,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:08:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:44,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:08:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:44,485 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 18:08:44,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:44,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789396022] [2021-11-13 18:08:44,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789396022] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:44,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:44,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:08:44,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854088832] [2021-11-13 18:08:44,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:44,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:08:44,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:44,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:08:44,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:08:44,490 INFO L87 Difference]: Start difference. First operand 328 states and 506 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:46,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:46,709 INFO L93 Difference]: Finished difference Result 773 states and 1219 transitions. [2021-11-13 18:08:46,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:08:46,709 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-13 18:08:46,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:46,714 INFO L225 Difference]: With dead ends: 773 [2021-11-13 18:08:46,714 INFO L226 Difference]: Without dead ends: 464 [2021-11-13 18:08:46,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:08:46,717 INFO L933 BasicCegarLoop]: 541 mSDtfsCounter, 934 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1582.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 952 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.06ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1842.26ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:46,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [952 Valid, 1344 Invalid, 1325 Unknown, 0 Unchecked, 18.06ms Time], IncrementalHoareTripleChecker [70 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 1842.26ms Time] [2021-11-13 18:08:46,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-11-13 18:08:46,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 328. [2021-11-13 18:08:46,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.5387205387205387) internal successors, (457), 298 states have internal predecessors, (457), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 18:08:46,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 505 transitions. [2021-11-13 18:08:46,772 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 505 transitions. Word has length 156 [2021-11-13 18:08:46,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:46,773 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 505 transitions. [2021-11-13 18:08:46,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:46,773 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 505 transitions. [2021-11-13 18:08:46,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:08:46,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:46,777 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:46,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 18:08:46,778 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:46,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:46,779 INFO L85 PathProgramCache]: Analyzing trace with hash -860787180, now seen corresponding path program 1 times [2021-11-13 18:08:46,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:46,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248042176] [2021-11-13 18:08:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:46,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:46,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:08:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:46,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:08:46,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:46,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:08:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:46,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:08:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:46,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:08:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:46,980 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 18:08:46,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:46,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248042176] [2021-11-13 18:08:46,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248042176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:46,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:46,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:08:46,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312708684] [2021-11-13 18:08:46,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:46,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:08:46,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:46,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:08:46,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:08:46,984 INFO L87 Difference]: Start difference. First operand 328 states and 505 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:49,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:49,172 INFO L93 Difference]: Finished difference Result 772 states and 1214 transitions. [2021-11-13 18:08:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:08:49,173 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-13 18:08:49,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:49,177 INFO L225 Difference]: With dead ends: 772 [2021-11-13 18:08:49,178 INFO L226 Difference]: Without dead ends: 463 [2021-11-13 18:08:49,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:08:49,184 INFO L933 BasicCegarLoop]: 537 mSDtfsCounter, 932 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1574.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.84ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1814.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:49,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [950 Valid, 1340 Invalid, 1313 Unknown, 0 Unchecked, 16.84ms Time], IncrementalHoareTripleChecker [70 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 1814.77ms Time] [2021-11-13 18:08:49,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-11-13 18:08:49,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 328. [2021-11-13 18:08:49,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.5353535353535352) internal successors, (456), 298 states have internal predecessors, (456), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 18:08:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 504 transitions. [2021-11-13 18:08:49,260 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 504 transitions. Word has length 156 [2021-11-13 18:08:49,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:49,260 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 504 transitions. [2021-11-13 18:08:49,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:49,261 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 504 transitions. [2021-11-13 18:08:49,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:08:49,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:49,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:49,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 18:08:49,264 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:49,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:49,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1808839146, now seen corresponding path program 1 times [2021-11-13 18:08:49,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:49,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024229313] [2021-11-13 18:08:49,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:49,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:49,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:08:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:49,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:08:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:49,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:08:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:49,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:08:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:49,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:08:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:49,458 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 18:08:49,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:49,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024229313] [2021-11-13 18:08:49,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024229313] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:49,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:49,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:08:49,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363931102] [2021-11-13 18:08:49,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:49,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:08:49,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:49,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:08:49,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:08:49,466 INFO L87 Difference]: Start difference. First operand 328 states and 504 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:51,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:51,319 INFO L93 Difference]: Finished difference Result 771 states and 1209 transitions. [2021-11-13 18:08:51,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:08:51,320 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-13 18:08:51,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:51,324 INFO L225 Difference]: With dead ends: 771 [2021-11-13 18:08:51,325 INFO L226 Difference]: Without dead ends: 462 [2021-11-13 18:08:51,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:08:51,327 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 930 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1343.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 1336 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.24ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1562.95ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:51,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [948 Valid, 1336 Invalid, 1301 Unknown, 0 Unchecked, 14.24ms Time], IncrementalHoareTripleChecker [70 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 1562.95ms Time] [2021-11-13 18:08:51,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-13 18:08:51,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 328. [2021-11-13 18:08:51,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.531986531986532) internal successors, (455), 298 states have internal predecessors, (455), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 18:08:51,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 503 transitions. [2021-11-13 18:08:51,371 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 503 transitions. Word has length 156 [2021-11-13 18:08:51,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:51,371 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 503 transitions. [2021-11-13 18:08:51,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:51,372 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 503 transitions. [2021-11-13 18:08:51,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:08:51,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:51,375 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:51,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-13 18:08:51,376 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:51,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:51,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1901356500, now seen corresponding path program 1 times [2021-11-13 18:08:51,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:51,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046131577] [2021-11-13 18:08:51,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:51,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:51,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:08:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:51,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:08:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:51,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:08:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:51,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:08:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:51,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:08:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:51,560 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 18:08:51,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:51,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046131577] [2021-11-13 18:08:51,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046131577] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:51,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:51,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:08:51,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406594346] [2021-11-13 18:08:51,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:51,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:08:51,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:51,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:08:51,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:08:51,564 INFO L87 Difference]: Start difference. First operand 328 states and 503 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:53,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:53,177 INFO L93 Difference]: Finished difference Result 770 states and 1204 transitions. [2021-11-13 18:08:53,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:08:53,178 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-13 18:08:53,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:53,182 INFO L225 Difference]: With dead ends: 770 [2021-11-13 18:08:53,182 INFO L226 Difference]: Without dead ends: 461 [2021-11-13 18:08:53,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:08:53,185 INFO L933 BasicCegarLoop]: 529 mSDtfsCounter, 1069 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1105.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1087 SdHoareTripleChecker+Valid, 1164 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.11ms SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1305.54ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:53,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1087 Valid, 1164 Invalid, 1174 Unknown, 0 Unchecked, 11.11ms Time], IncrementalHoareTripleChecker [94 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 1305.54ms Time] [2021-11-13 18:08:53,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-13 18:08:53,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 328. [2021-11-13 18:08:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.5286195286195285) internal successors, (454), 298 states have internal predecessors, (454), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 18:08:53,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 502 transitions. [2021-11-13 18:08:53,239 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 502 transitions. Word has length 156 [2021-11-13 18:08:53,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:53,240 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 502 transitions. [2021-11-13 18:08:53,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:53,241 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 502 transitions. [2021-11-13 18:08:53,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:08:53,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:53,243 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:53,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-13 18:08:53,244 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:53,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:53,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1466850902, now seen corresponding path program 1 times [2021-11-13 18:08:53,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:53,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316569056] [2021-11-13 18:08:53,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:53,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:53,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:08:53,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:53,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:08:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:53,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:08:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:53,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:08:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:53,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:08:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:53,416 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 18:08:53,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:53,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316569056] [2021-11-13 18:08:53,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316569056] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:53,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:53,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:08:53,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209163659] [2021-11-13 18:08:53,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:53,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:08:53,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:53,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:08:53,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:08:53,420 INFO L87 Difference]: Start difference. First operand 328 states and 502 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:54,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:54,957 INFO L93 Difference]: Finished difference Result 769 states and 1199 transitions. [2021-11-13 18:08:54,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:08:54,958 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-13 18:08:54,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:54,962 INFO L225 Difference]: With dead ends: 769 [2021-11-13 18:08:54,962 INFO L226 Difference]: Without dead ends: 460 [2021-11-13 18:08:54,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:08:54,965 INFO L933 BasicCegarLoop]: 496 mSDtfsCounter, 1120 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1053.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.33ms SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1261.53ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:54,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1138 Valid, 1129 Invalid, 1137 Unknown, 0 Unchecked, 10.33ms Time], IncrementalHoareTripleChecker [99 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 1261.53ms Time] [2021-11-13 18:08:54,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-13 18:08:55,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 328. [2021-11-13 18:08:55,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.5252525252525253) internal successors, (453), 298 states have internal predecessors, (453), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 18:08:55,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 501 transitions. [2021-11-13 18:08:55,022 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 501 transitions. Word has length 156 [2021-11-13 18:08:55,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:55,023 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 501 transitions. [2021-11-13 18:08:55,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:55,024 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 501 transitions. [2021-11-13 18:08:55,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:08:55,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:55,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:55,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-13 18:08:55,027 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:55,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:55,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1037192596, now seen corresponding path program 1 times [2021-11-13 18:08:55,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:55,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142272655] [2021-11-13 18:08:55,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:55,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:55,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:55,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:08:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:55,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:08:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:55,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:08:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:55,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:08:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:55,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:08:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:55,209 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 18:08:55,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:55,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142272655] [2021-11-13 18:08:55,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142272655] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:55,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:55,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:08:55,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359485100] [2021-11-13 18:08:55,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:55,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:08:55,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:55,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:08:55,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:08:55,213 INFO L87 Difference]: Start difference. First operand 328 states and 501 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:57,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:57,306 INFO L93 Difference]: Finished difference Result 767 states and 1192 transitions. [2021-11-13 18:08:57,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:08:57,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-13 18:08:57,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:57,311 INFO L225 Difference]: With dead ends: 767 [2021-11-13 18:08:57,311 INFO L226 Difference]: Without dead ends: 458 [2021-11-13 18:08:57,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:08:57,315 INFO L933 BasicCegarLoop]: 517 mSDtfsCounter, 923 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1543.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 1318 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.03ms SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1769.07ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:57,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [941 Valid, 1318 Invalid, 1263 Unknown, 0 Unchecked, 17.03ms Time], IncrementalHoareTripleChecker [75 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 1769.07ms Time] [2021-11-13 18:08:57,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-11-13 18:08:57,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 328. [2021-11-13 18:08:57,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.5218855218855218) internal successors, (452), 298 states have internal predecessors, (452), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 18:08:57,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 500 transitions. [2021-11-13 18:08:57,373 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 500 transitions. Word has length 156 [2021-11-13 18:08:57,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:57,374 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 500 transitions. [2021-11-13 18:08:57,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:57,375 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 500 transitions. [2021-11-13 18:08:57,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:08:57,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:57,377 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:57,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-13 18:08:57,377 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:57,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:57,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1984230482, now seen corresponding path program 1 times [2021-11-13 18:08:57,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:57,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433688321] [2021-11-13 18:08:57,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:57,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:57,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:08:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:57,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:08:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:57,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:08:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:57,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:08:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:57,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:08:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:57,577 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 18:08:57,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:57,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433688321] [2021-11-13 18:08:57,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433688321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:57,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:57,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:08:57,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540374831] [2021-11-13 18:08:57,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:57,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:08:57,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:57,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:08:57,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:08:57,582 INFO L87 Difference]: Start difference. First operand 328 states and 500 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:59,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:59,435 INFO L93 Difference]: Finished difference Result 766 states and 1187 transitions. [2021-11-13 18:08:59,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:08:59,436 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-13 18:08:59,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:59,441 INFO L225 Difference]: With dead ends: 766 [2021-11-13 18:08:59,441 INFO L226 Difference]: Without dead ends: 457 [2021-11-13 18:08:59,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:08:59,445 INFO L933 BasicCegarLoop]: 513 mSDtfsCounter, 921 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1356.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.02ms SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1563.39ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:59,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 1314 Invalid, 1251 Unknown, 0 Unchecked, 13.02ms Time], IncrementalHoareTripleChecker [75 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 1563.39ms Time] [2021-11-13 18:08:59,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-11-13 18:08:59,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 328. [2021-11-13 18:08:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.5185185185185186) internal successors, (451), 298 states have internal predecessors, (451), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 18:08:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 499 transitions. [2021-11-13 18:08:59,527 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 499 transitions. Word has length 156 [2021-11-13 18:08:59,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:59,528 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 499 transitions. [2021-11-13 18:08:59,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:08:59,529 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 499 transitions. [2021-11-13 18:08:59,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:08:59,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:59,531 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:59,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-13 18:08:59,531 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:59,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:59,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1448903212, now seen corresponding path program 1 times [2021-11-13 18:08:59,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:59,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638618508] [2021-11-13 18:08:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:59,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:59,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:08:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:59,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:08:59,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:59,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:08:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:59,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:08:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:59,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:08:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:59,723 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 18:08:59,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:59,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638618508] [2021-11-13 18:08:59,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638618508] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:59,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:59,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:08:59,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108942152] [2021-11-13 18:08:59,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:59,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:08:59,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:59,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:08:59,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:08:59,727 INFO L87 Difference]: Start difference. First operand 328 states and 499 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:09:01,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:01,404 INFO L93 Difference]: Finished difference Result 765 states and 1182 transitions. [2021-11-13 18:09:01,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:09:01,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-13 18:09:01,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:01,410 INFO L225 Difference]: With dead ends: 765 [2021-11-13 18:09:01,410 INFO L226 Difference]: Without dead ends: 456 [2021-11-13 18:09:01,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:09:01,414 INFO L933 BasicCegarLoop]: 509 mSDtfsCounter, 1060 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1136.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1078 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.19ms SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1333.21ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:01,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1078 Valid, 1142 Invalid, 1134 Unknown, 0 Unchecked, 12.19ms Time], IncrementalHoareTripleChecker [99 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 1333.21ms Time] [2021-11-13 18:09:01,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-11-13 18:09:01,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 328. [2021-11-13 18:09:01,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.5151515151515151) internal successors, (450), 298 states have internal predecessors, (450), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 18:09:01,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 498 transitions. [2021-11-13 18:09:01,476 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 498 transitions. Word has length 156 [2021-11-13 18:09:01,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:01,477 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 498 transitions. [2021-11-13 18:09:01,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:09:01,477 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 498 transitions. [2021-11-13 18:09:01,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:09:01,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:01,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:09:01,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-13 18:09:01,480 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:01,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:01,481 INFO L85 PathProgramCache]: Analyzing trace with hash 795655186, now seen corresponding path program 1 times [2021-11-13 18:09:01,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:01,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025600858] [2021-11-13 18:09:01,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:01,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:01,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:09:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:01,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:09:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:01,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:09:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:01,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:09:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:01,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:09:01,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:01,696 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 18:09:01,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:01,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025600858] [2021-11-13 18:09:01,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025600858] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:01,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:09:01,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:09:01,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925725589] [2021-11-13 18:09:01,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:01,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:09:01,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:01,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:09:01,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:09:01,701 INFO L87 Difference]: Start difference. First operand 328 states and 498 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:09:03,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:03,576 INFO L93 Difference]: Finished difference Result 764 states and 1177 transitions. [2021-11-13 18:09:03,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:09:03,577 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-13 18:09:03,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:03,581 INFO L225 Difference]: With dead ends: 764 [2021-11-13 18:09:03,581 INFO L226 Difference]: Without dead ends: 455 [2021-11-13 18:09:03,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:09:03,584 INFO L933 BasicCegarLoop]: 505 mSDtfsCounter, 917 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1341.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.28ms SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1557.15ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:03,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [935 Valid, 1306 Invalid, 1227 Unknown, 0 Unchecked, 14.28ms Time], IncrementalHoareTripleChecker [75 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 1557.15ms Time] [2021-11-13 18:09:03,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-11-13 18:09:03,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 328. [2021-11-13 18:09:03,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.5117845117845117) internal successors, (449), 298 states have internal predecessors, (449), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 18:09:03,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 497 transitions. [2021-11-13 18:09:03,650 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 497 transitions. Word has length 156 [2021-11-13 18:09:03,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:03,651 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 497 transitions. [2021-11-13 18:09:03,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:09:03,652 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 497 transitions. [2021-11-13 18:09:03,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:09:03,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:03,654 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:09:03,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-13 18:09:03,654 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:03,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:03,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1283702292, now seen corresponding path program 1 times [2021-11-13 18:09:03,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:03,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492889225] [2021-11-13 18:09:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:03,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:03,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:09:03,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:03,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:09:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:03,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:09:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:03,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:09:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:03,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:09:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:03,843 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 18:09:03,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:03,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492889225] [2021-11-13 18:09:03,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492889225] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:03,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:09:03,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:09:03,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006258191] [2021-11-13 18:09:03,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:03,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:09:03,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:03,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:09:03,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:09:03,849 INFO L87 Difference]: Start difference. First operand 328 states and 497 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:09:05,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:05,726 INFO L93 Difference]: Finished difference Result 763 states and 1172 transitions. [2021-11-13 18:09:05,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:09:05,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-13 18:09:05,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:05,732 INFO L225 Difference]: With dead ends: 763 [2021-11-13 18:09:05,732 INFO L226 Difference]: Without dead ends: 454 [2021-11-13 18:09:05,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:09:05,735 INFO L933 BasicCegarLoop]: 501 mSDtfsCounter, 915 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1351.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 933 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.85ms SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1555.97ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:05,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [933 Valid, 1302 Invalid, 1215 Unknown, 0 Unchecked, 15.85ms Time], IncrementalHoareTripleChecker [75 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 1555.97ms Time] [2021-11-13 18:09:05,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-11-13 18:09:05,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 328. [2021-11-13 18:09:05,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.5084175084175084) internal successors, (448), 298 states have internal predecessors, (448), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 18:09:05,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 496 transitions. [2021-11-13 18:09:05,803 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 496 transitions. Word has length 156 [2021-11-13 18:09:05,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:05,804 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 496 transitions. [2021-11-13 18:09:05,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:09:05,805 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 496 transitions. [2021-11-13 18:09:05,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:09:05,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:05,807 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:09:05,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-13 18:09:05,808 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:05,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:05,808 INFO L85 PathProgramCache]: Analyzing trace with hash 191067090, now seen corresponding path program 1 times [2021-11-13 18:09:05,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:05,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224978220] [2021-11-13 18:09:05,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:05,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:05,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:09:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:05,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:09:05,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:05,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:09:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:05,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:09:06,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:06,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:09:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:06,011 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 18:09:06,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:06,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224978220] [2021-11-13 18:09:06,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224978220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:06,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:09:06,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:09:06,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694630208] [2021-11-13 18:09:06,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:06,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:09:06,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:06,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:09:06,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:09:06,015 INFO L87 Difference]: Start difference. First operand 328 states and 496 transitions. Second operand has 8 states, 8 states have (on average 18.25) internal successors, (146), 6 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:09:09,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:09,547 INFO L93 Difference]: Finished difference Result 1276 states and 1965 transitions. [2021-11-13 18:09:09,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:09:09,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.25) internal successors, (146), 6 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-13 18:09:09,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:09,559 INFO L225 Difference]: With dead ends: 1276 [2021-11-13 18:09:09,559 INFO L226 Difference]: Without dead ends: 967 [2021-11-13 18:09:09,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:09:09,562 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 1714 mSDsluCounter, 1920 mSDsCounter, 0 mSdLazyCounter, 2458 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2267.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1731 SdHoareTripleChecker+Valid, 2785 SdHoareTripleChecker+Invalid, 2575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.64ms SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2670.54ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:09,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1731 Valid, 2785 Invalid, 2575 Unknown, 0 Unchecked, 25.64ms Time], IncrementalHoareTripleChecker [117 Valid, 2458 Invalid, 0 Unknown, 0 Unchecked, 2670.54ms Time] [2021-11-13 18:09:09,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-11-13 18:09:09,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 637. [2021-11-13 18:09:09,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 580 states have (on average 1.5120689655172415) internal successors, (877), 582 states have internal predecessors, (877), 43 states have call successors, (43), 12 states have call predecessors, (43), 13 states have return successors, (46), 44 states have call predecessors, (46), 43 states have call successors, (46) [2021-11-13 18:09:09,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 966 transitions. [2021-11-13 18:09:09,686 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 966 transitions. Word has length 156 [2021-11-13 18:09:09,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:09,687 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 966 transitions. [2021-11-13 18:09:09,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.25) internal successors, (146), 6 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:09:09,687 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 966 transitions. [2021-11-13 18:09:09,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:09:09,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:09,690 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:09:09,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-13 18:09:09,690 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:09,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:09,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1091105196, now seen corresponding path program 1 times [2021-11-13 18:09:09,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:09,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254606904] [2021-11-13 18:09:09,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:09,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:09,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:09:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:09,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:09:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:09,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:09:09,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:09,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:09:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:09,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:09:09,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:09,858 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 18:09:09,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:09,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254606904] [2021-11-13 18:09:09,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254606904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:09,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:09:09,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:09:09,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577653934] [2021-11-13 18:09:09,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:09,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:09:09,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:09,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:09:09,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:09:09,862 INFO L87 Difference]: Start difference. First operand 637 states and 966 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:09:11,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:11,731 INFO L93 Difference]: Finished difference Result 1509 states and 2313 transitions. [2021-11-13 18:09:11,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:09:11,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-13 18:09:11,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:11,742 INFO L225 Difference]: With dead ends: 1509 [2021-11-13 18:09:11,742 INFO L226 Difference]: Without dead ends: 891 [2021-11-13 18:09:11,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:09:11,747 INFO L933 BasicCegarLoop]: 480 mSDtfsCounter, 934 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1243.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 952 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.10ms SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1476.99ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:11,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [952 Valid, 1279 Invalid, 1175 Unknown, 0 Unchecked, 14.10ms Time], IncrementalHoareTripleChecker [83 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 1476.99ms Time] [2021-11-13 18:09:11,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-11-13 18:09:11,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 637. [2021-11-13 18:09:11,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 580 states have (on average 1.5086206896551724) internal successors, (875), 582 states have internal predecessors, (875), 43 states have call successors, (43), 12 states have call predecessors, (43), 13 states have return successors, (46), 44 states have call predecessors, (46), 43 states have call successors, (46) [2021-11-13 18:09:11,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 964 transitions. [2021-11-13 18:09:11,901 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 964 transitions. Word has length 156 [2021-11-13 18:09:11,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:11,901 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 964 transitions. [2021-11-13 18:09:11,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:09:11,902 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 964 transitions. [2021-11-13 18:09:11,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:09:11,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:11,904 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:09:11,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-13 18:09:11,905 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:11,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:11,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1361386386, now seen corresponding path program 1 times [2021-11-13 18:09:11,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:11,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799497733] [2021-11-13 18:09:11,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:11,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:11,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:09:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:12,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:09:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:12,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:09:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:12,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:09:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:12,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:09:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:12,121 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 18:09:12,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:12,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799497733] [2021-11-13 18:09:12,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799497733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:12,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:09:12,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:09:12,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995544659] [2021-11-13 18:09:12,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:12,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:09:12,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:12,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:09:12,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:09:12,125 INFO L87 Difference]: Start difference. First operand 637 states and 964 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:09:13,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:13,783 INFO L93 Difference]: Finished difference Result 1503 states and 2295 transitions. [2021-11-13 18:09:13,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:09:13,784 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-13 18:09:13,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:13,792 INFO L225 Difference]: With dead ends: 1503 [2021-11-13 18:09:13,792 INFO L226 Difference]: Without dead ends: 885 [2021-11-13 18:09:13,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:09:13,797 INFO L933 BasicCegarLoop]: 485 mSDtfsCounter, 1054 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1042.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.57ms SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1232.56ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:13,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1072 Valid, 1118 Invalid, 1086 Unknown, 0 Unchecked, 11.57ms Time], IncrementalHoareTripleChecker [105 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 1232.56ms Time] [2021-11-13 18:09:13,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2021-11-13 18:09:13,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 637. [2021-11-13 18:09:13,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 580 states have (on average 1.5051724137931035) internal successors, (873), 582 states have internal predecessors, (873), 43 states have call successors, (43), 12 states have call predecessors, (43), 13 states have return successors, (46), 44 states have call predecessors, (46), 43 states have call successors, (46) [2021-11-13 18:09:13,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 962 transitions. [2021-11-13 18:09:13,937 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 962 transitions. Word has length 156 [2021-11-13 18:09:13,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:13,937 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 962 transitions. [2021-11-13 18:09:13,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:09:13,938 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 962 transitions. [2021-11-13 18:09:13,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:09:13,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:13,940 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:09:13,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-13 18:09:13,941 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:13,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:13,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1028743248, now seen corresponding path program 1 times [2021-11-13 18:09:13,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:13,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205559795] [2021-11-13 18:09:13,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:13,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:13,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:09:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:14,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:09:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:14,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:09:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:14,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:09:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:14,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:09:14,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:14,121 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 18:09:14,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:14,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205559795] [2021-11-13 18:09:14,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205559795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:14,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:09:14,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:09:14,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847269629] [2021-11-13 18:09:14,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:14,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:09:14,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:14,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:09:14,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:09:14,125 INFO L87 Difference]: Start difference. First operand 637 states and 962 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:09:15,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:15,945 INFO L93 Difference]: Finished difference Result 1500 states and 2283 transitions. [2021-11-13 18:09:15,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:09:15,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-13 18:09:15,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:15,953 INFO L225 Difference]: With dead ends: 1500 [2021-11-13 18:09:15,954 INFO L226 Difference]: Without dead ends: 882 [2021-11-13 18:09:15,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:09:15,958 INFO L933 BasicCegarLoop]: 481 mSDtfsCounter, 911 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1214.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.30ms SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1422.04ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:15,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [929 Valid, 1282 Invalid, 1167 Unknown, 0 Unchecked, 12.30ms Time], IncrementalHoareTripleChecker [81 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 1422.04ms Time] [2021-11-13 18:09:15,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-11-13 18:09:16,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 637. [2021-11-13 18:09:16,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 580 states have (on average 1.5017241379310344) internal successors, (871), 582 states have internal predecessors, (871), 43 states have call successors, (43), 12 states have call predecessors, (43), 13 states have return successors, (46), 44 states have call predecessors, (46), 43 states have call successors, (46) [2021-11-13 18:09:16,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 960 transitions. [2021-11-13 18:09:16,117 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 960 transitions. Word has length 156 [2021-11-13 18:09:16,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:16,117 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 960 transitions. [2021-11-13 18:09:16,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:09:16,118 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 960 transitions. [2021-11-13 18:09:16,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:09:16,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:16,120 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:09:16,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-13 18:09:16,121 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:16,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:16,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1337291822, now seen corresponding path program 1 times [2021-11-13 18:09:16,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:16,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232896353] [2021-11-13 18:09:16,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:16,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:16,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:09:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:16,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:09:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:16,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:09:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:16,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:09:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:16,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:09:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:16,309 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 18:09:16,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:16,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232896353] [2021-11-13 18:09:16,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232896353] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:16,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:09:16,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:09:16,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653732188] [2021-11-13 18:09:16,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:16,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:09:16,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:16,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:09:16,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:09:16,314 INFO L87 Difference]: Start difference. First operand 637 states and 960 transitions. Second operand has 8 states, 8 states have (on average 18.25) internal successors, (146), 6 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:09:19,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:19,870 INFO L93 Difference]: Finished difference Result 2377 states and 3638 transitions. [2021-11-13 18:09:19,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:09:19,872 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.25) internal successors, (146), 6 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-13 18:09:19,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:19,889 INFO L225 Difference]: With dead ends: 2377 [2021-11-13 18:09:19,889 INFO L226 Difference]: Without dead ends: 1759 [2021-11-13 18:09:19,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:09:19,894 INFO L933 BasicCegarLoop]: 755 mSDtfsCounter, 1636 mSDsluCounter, 1917 mSDsCounter, 0 mSdLazyCounter, 2187 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2163.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1653 SdHoareTripleChecker+Valid, 2672 SdHoareTripleChecker+Invalid, 2305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.88ms SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2535.75ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:19,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1653 Valid, 2672 Invalid, 2305 Unknown, 0 Unchecked, 25.88ms Time], IncrementalHoareTripleChecker [118 Valid, 2187 Invalid, 0 Unknown, 0 Unchecked, 2535.75ms Time] [2021-11-13 18:09:19,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2021-11-13 18:09:20,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1251. [2021-11-13 18:09:20,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1141 states have (on average 1.5004382120946538) internal successors, (1712), 1147 states have internal predecessors, (1712), 80 states have call successors, (80), 24 states have call predecessors, (80), 29 states have return successors, (95), 83 states have call predecessors, (95), 80 states have call successors, (95) [2021-11-13 18:09:20,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1887 transitions. [2021-11-13 18:09:20,201 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1887 transitions. Word has length 156 [2021-11-13 18:09:20,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:20,201 INFO L470 AbstractCegarLoop]: Abstraction has 1251 states and 1887 transitions. [2021-11-13 18:09:20,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.25) internal successors, (146), 6 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:09:20,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1887 transitions. [2021-11-13 18:09:20,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:09:20,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:20,204 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:09:20,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-13 18:09:20,204 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:20,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:20,204 INFO L85 PathProgramCache]: Analyzing trace with hash 664594448, now seen corresponding path program 1 times [2021-11-13 18:09:20,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:20,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404669514] [2021-11-13 18:09:20,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:20,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:20,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:09:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:20,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:09:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:20,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:09:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:20,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:09:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:20,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:09:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:20,435 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 18:09:20,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:20,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404669514] [2021-11-13 18:09:20,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404669514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:20,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:09:20,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:09:20,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797706158] [2021-11-13 18:09:20,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:20,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:09:20,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:20,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:09:20,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:09:20,438 INFO L87 Difference]: Start difference. First operand 1251 states and 1887 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:09:23,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:23,699 INFO L93 Difference]: Finished difference Result 3774 states and 5713 transitions. [2021-11-13 18:09:23,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:09:23,700 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-13 18:09:23,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:23,724 INFO L225 Difference]: With dead ends: 3774 [2021-11-13 18:09:23,724 INFO L226 Difference]: Without dead ends: 2543 [2021-11-13 18:09:23,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:09:23,732 INFO L933 BasicCegarLoop]: 509 mSDtfsCounter, 1009 mSDsluCounter, 1252 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1694.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1009 SdHoareTripleChecker+Valid, 1761 SdHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.47ms SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1975.58ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:23,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1009 Valid, 1761 Invalid, 1740 Unknown, 0 Unchecked, 19.47ms Time], IncrementalHoareTripleChecker [56 Valid, 1684 Invalid, 0 Unknown, 0 Unchecked, 1975.58ms Time] [2021-11-13 18:09:23,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2021-11-13 18:09:23,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 1263. [2021-11-13 18:09:23,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1153 states have (on average 1.495229835212489) internal successors, (1724), 1159 states have internal predecessors, (1724), 80 states have call successors, (80), 24 states have call predecessors, (80), 29 states have return successors, (95), 83 states have call predecessors, (95), 80 states have call successors, (95) [2021-11-13 18:09:23,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 1899 transitions. [2021-11-13 18:09:23,989 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 1899 transitions. Word has length 156 [2021-11-13 18:09:23,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:23,989 INFO L470 AbstractCegarLoop]: Abstraction has 1263 states and 1899 transitions. [2021-11-13 18:09:23,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:09:23,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 1899 transitions. [2021-11-13 18:09:23,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:09:23,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:23,993 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:09:23,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-13 18:09:23,993 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:23,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:23,994 INFO L85 PathProgramCache]: Analyzing trace with hash 783035922, now seen corresponding path program 1 times [2021-11-13 18:09:23,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:23,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786326293] [2021-11-13 18:09:23,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:23,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:24,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:09:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:24,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:09:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:24,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:09:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:24,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:09:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:24,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:09:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:24,238 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 18:09:24,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:24,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786326293] [2021-11-13 18:09:24,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786326293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:24,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:09:24,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:09:24,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8409480] [2021-11-13 18:09:24,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:24,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:09:24,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:24,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:09:24,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:09:24,242 INFO L87 Difference]: Start difference. First operand 1263 states and 1899 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:09:30,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:30,781 INFO L93 Difference]: Finished difference Result 7922 states and 12429 transitions. [2021-11-13 18:09:30,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 18:09:30,781 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-13 18:09:30,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:30,826 INFO L225 Difference]: With dead ends: 7922 [2021-11-13 18:09:30,826 INFO L226 Difference]: Without dead ends: 6679 [2021-11-13 18:09:30,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:09:30,837 INFO L933 BasicCegarLoop]: 1050 mSDtfsCounter, 3523 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 2544 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3878.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3572 SdHoareTripleChecker+Valid, 2408 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 39.06ms SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 2544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4471.88ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:30,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3572 Valid, 2408 Invalid, 2920 Unknown, 0 Unchecked, 39.06ms Time], IncrementalHoareTripleChecker [376 Valid, 2544 Invalid, 0 Unknown, 0 Unchecked, 4471.88ms Time] [2021-11-13 18:09:30,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6679 states. [2021-11-13 18:09:32,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6679 to 4835. [2021-11-13 18:09:32,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4835 states, 4418 states have (on average 1.4918515165233137) internal successors, (6591), 4451 states have internal predecessors, (6591), 300 states have call successors, (300), 96 states have call predecessors, (300), 116 states have return successors, (503), 291 states have call predecessors, (503), 300 states have call successors, (503) [2021-11-13 18:09:32,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4835 states to 4835 states and 7394 transitions. [2021-11-13 18:09:32,136 INFO L78 Accepts]: Start accepts. Automaton has 4835 states and 7394 transitions. Word has length 156 [2021-11-13 18:09:32,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:32,137 INFO L470 AbstractCegarLoop]: Abstraction has 4835 states and 7394 transitions. [2021-11-13 18:09:32,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:09:32,137 INFO L276 IsEmpty]: Start isEmpty. Operand 4835 states and 7394 transitions. [2021-11-13 18:09:32,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-13 18:09:32,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:32,153 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 18:09:32,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-13 18:09:32,153 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:32,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:32,154 INFO L85 PathProgramCache]: Analyzing trace with hash -91588747, now seen corresponding path program 1 times [2021-11-13 18:09:32,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:32,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936491651] [2021-11-13 18:09:32,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:32,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:32,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:09:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:32,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:09:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:32,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:09:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:32,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:09:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:32,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:09:32,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:32,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-11-13 18:09:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:32,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:09:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:32,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2021-11-13 18:09:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 18:09:32,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:32,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936491651] [2021-11-13 18:09:32,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936491651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:32,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203940527] [2021-11-13 18:09:32,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:32,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:32,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:09:32,411 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:09:32,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:09:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:32,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:09:32,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:09:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:09:33,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:09:33,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203940527] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:33,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:09:33,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 18:09:33,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539570678] [2021-11-13 18:09:33,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:33,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:09:33,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:33,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:09:33,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:09:33,228 INFO L87 Difference]: Start difference. First operand 4835 states and 7394 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:09:35,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:35,009 INFO L93 Difference]: Finished difference Result 14384 states and 22314 transitions. [2021-11-13 18:09:35,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:09:35,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 254 [2021-11-13 18:09:35,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:35,067 INFO L225 Difference]: With dead ends: 14384 [2021-11-13 18:09:35,067 INFO L226 Difference]: Without dead ends: 9569 [2021-11-13 18:09:35,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:09:35,099 INFO L933 BasicCegarLoop]: 508 mSDtfsCounter, 424 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.37ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.74ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:35,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 960 Invalid, 12 Unknown, 0 Unchecked, 2.37ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 11.74ms Time] [2021-11-13 18:09:35,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9569 states. [2021-11-13 18:09:37,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9569 to 9535. [2021-11-13 18:09:37,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9535 states, 8722 states have (on average 1.4917450126117864) internal successors, (13011), 8787 states have internal predecessors, (13011), 580 states have call successors, (580), 192 states have call predecessors, (580), 232 states have return successors, (971), 559 states have call predecessors, (971), 580 states have call successors, (971) [2021-11-13 18:09:37,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9535 states to 9535 states and 14562 transitions. [2021-11-13 18:09:37,237 INFO L78 Accepts]: Start accepts. Automaton has 9535 states and 14562 transitions. Word has length 254 [2021-11-13 18:09:37,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:37,238 INFO L470 AbstractCegarLoop]: Abstraction has 9535 states and 14562 transitions. [2021-11-13 18:09:37,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:09:37,239 INFO L276 IsEmpty]: Start isEmpty. Operand 9535 states and 14562 transitions. [2021-11-13 18:09:37,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-13 18:09:37,262 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:37,262 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 18:09:37,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:09:37,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:37,488 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:37,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:37,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1986242965, now seen corresponding path program 1 times [2021-11-13 18:09:37,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:37,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863155101] [2021-11-13 18:09:37,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:37,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:37,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:09:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:37,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:09:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:37,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:09:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:37,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:09:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:37,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:09:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:37,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-11-13 18:09:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:37,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:09:37,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:37,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2021-11-13 18:09:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:37,725 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 18:09:37,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:37,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863155101] [2021-11-13 18:09:37,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863155101] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:37,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871831392] [2021-11-13 18:09:37,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:37,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:37,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:09:37,728 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:09:37,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:09:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:37,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:09:37,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:09:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 18:09:38,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:09:38,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871831392] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:38,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:09:38,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 18:09:38,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340276925] [2021-11-13 18:09:38,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:38,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:09:38,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:38,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:09:38,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:09:38,732 INFO L87 Difference]: Start difference. First operand 9535 states and 14562 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:09:42,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:42,092 INFO L93 Difference]: Finished difference Result 28452 states and 44094 transitions. [2021-11-13 18:09:42,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:09:42,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 254 [2021-11-13 18:09:42,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:42,192 INFO L225 Difference]: With dead ends: 28452 [2021-11-13 18:09:42,192 INFO L226 Difference]: Without dead ends: 18937 [2021-11-13 18:09:42,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:09:42,234 INFO L933 BasicCegarLoop]: 508 mSDtfsCounter, 382 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.28ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.02ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:42,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 960 Invalid, 12 Unknown, 0 Unchecked, 2.28ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 11.02ms Time] [2021-11-13 18:09:42,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18937 states. [2021-11-13 18:09:45,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18937 to 18871. [2021-11-13 18:09:45,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18871 states, 17266 states have (on average 1.490733232943357) internal successors, (25739), 17395 states have internal predecessors, (25739), 1140 states have call successors, (1140), 384 states have call predecessors, (1140), 464 states have return successors, (1907), 1095 states have call predecessors, (1907), 1140 states have call successors, (1907) [2021-11-13 18:09:45,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18871 states to 18871 states and 28786 transitions. [2021-11-13 18:09:45,911 INFO L78 Accepts]: Start accepts. Automaton has 18871 states and 28786 transitions. Word has length 254 [2021-11-13 18:09:45,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:45,915 INFO L470 AbstractCegarLoop]: Abstraction has 18871 states and 28786 transitions. [2021-11-13 18:09:45,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:09:45,915 INFO L276 IsEmpty]: Start isEmpty. Operand 18871 states and 28786 transitions. [2021-11-13 18:09:45,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-13 18:09:45,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:45,962 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 18:09:46,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-13 18:09:46,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:46,176 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:46,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:46,176 INFO L85 PathProgramCache]: Analyzing trace with hash 595559349, now seen corresponding path program 1 times [2021-11-13 18:09:46,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:46,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374735083] [2021-11-13 18:09:46,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:46,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:46,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:09:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:46,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:09:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:46,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:09:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:46,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:09:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:46,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:09:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:46,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-11-13 18:09:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:46,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:09:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:46,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2021-11-13 18:09:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 18:09:46,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:46,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374735083] [2021-11-13 18:09:46,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374735083] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:46,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564546855] [2021-11-13 18:09:46,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:46,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:46,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:09:46,439 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:09:46,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:09:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:46,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:09:46,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:09:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 18:09:47,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:09:47,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564546855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:47,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:09:47,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 18:09:47,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574099216] [2021-11-13 18:09:47,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:47,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:09:47,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:47,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:09:47,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:09:47,377 INFO L87 Difference]: Start difference. First operand 18871 states and 28786 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:09:54,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:54,069 INFO L93 Difference]: Finished difference Result 56252 states and 87006 transitions. [2021-11-13 18:09:54,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:09:54,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 254 [2021-11-13 18:09:54,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:54,275 INFO L225 Difference]: With dead ends: 56252 [2021-11-13 18:09:54,276 INFO L226 Difference]: Without dead ends: 37401 [2021-11-13 18:09:54,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:09:54,363 INFO L933 BasicCegarLoop]: 508 mSDtfsCounter, 400 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.68ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.19ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:54,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 960 Invalid, 12 Unknown, 0 Unchecked, 2.68ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 11.19ms Time] [2021-11-13 18:09:54,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37401 states. [2021-11-13 18:10:01,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37401 to 37271. [2021-11-13 18:10:01,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37271 states, 34130 states have (on average 1.4906240843832406) internal successors, (50875), 34387 states have internal predecessors, (50875), 2212 states have call successors, (2212), 768 states have call predecessors, (2212), 928 states have return successors, (3695), 2119 states have call predecessors, (3695), 2212 states have call successors, (3695) [2021-11-13 18:10:01,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37271 states to 37271 states and 56782 transitions. [2021-11-13 18:10:01,498 INFO L78 Accepts]: Start accepts. Automaton has 37271 states and 56782 transitions. Word has length 254 [2021-11-13 18:10:01,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:01,499 INFO L470 AbstractCegarLoop]: Abstraction has 37271 states and 56782 transitions. [2021-11-13 18:10:01,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:10:01,499 INFO L276 IsEmpty]: Start isEmpty. Operand 37271 states and 56782 transitions. [2021-11-13 18:10:01,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-13 18:10:01,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:01,568 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 18:10:01,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:10:01,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-13 18:10:01,784 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:01,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:01,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1402661419, now seen corresponding path program 1 times [2021-11-13 18:10:01,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:10:01,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555816833] [2021-11-13 18:10:01,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:01,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:10:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:01,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:10:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:01,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:10:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:01,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:10:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:01,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:10:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:02,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:10:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:02,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-11-13 18:10:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:02,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:10:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:02,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2021-11-13 18:10:02,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 18:10:02,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:10:02,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555816833] [2021-11-13 18:10:02,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555816833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:10:02,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313305113] [2021-11-13 18:10:02,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:02,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:10:02,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:10:02,048 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:10:02,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 18:10:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:02,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:10:02,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:02,902 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-13 18:10:02,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:10:02,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313305113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:10:02,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:10:02,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 18:10:02,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474016709] [2021-11-13 18:10:02,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:10:02,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:10:02,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:10:02,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:10:02,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:10:02,907 INFO L87 Difference]: Start difference. First operand 37271 states and 56782 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:10:16,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:16,031 INFO L93 Difference]: Finished difference Result 111324 states and 172014 transitions. [2021-11-13 18:10:16,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:10:16,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 254 [2021-11-13 18:10:16,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:16,462 INFO L225 Difference]: With dead ends: 111324 [2021-11-13 18:10:16,462 INFO L226 Difference]: Without dead ends: 74073 [2021-11-13 18:10:16,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:10:16,649 INFO L933 BasicCegarLoop]: 508 mSDtfsCounter, 412 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.55ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.28ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:16,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 960 Invalid, 12 Unknown, 0 Unchecked, 2.55ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 11.28ms Time] [2021-11-13 18:10:16,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74073 states. [2021-11-13 18:10:30,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74073 to 73815. [2021-11-13 18:10:30,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73815 states, 67602 states have (on average 1.4895861069199137) internal successors, (100699), 68115 states have internal predecessors, (100699), 4356 states have call successors, (4356), 1536 states have call predecessors, (4356), 1856 states have return successors, (7271), 4167 states have call predecessors, (7271), 4356 states have call successors, (7271) [2021-11-13 18:10:30,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73815 states to 73815 states and 112326 transitions. [2021-11-13 18:10:30,848 INFO L78 Accepts]: Start accepts. Automaton has 73815 states and 112326 transitions. Word has length 254 [2021-11-13 18:10:30,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:30,849 INFO L470 AbstractCegarLoop]: Abstraction has 73815 states and 112326 transitions. [2021-11-13 18:10:30,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:10:30,850 INFO L276 IsEmpty]: Start isEmpty. Operand 73815 states and 112326 transitions. [2021-11-13 18:10:30,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-13 18:10:30,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:30,969 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 18:10:31,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-13 18:10:31,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-13 18:10:31,184 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:31,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:31,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1881114635, now seen corresponding path program 1 times [2021-11-13 18:10:31,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:10:31,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319300222] [2021-11-13 18:10:31,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:31,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:10:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:31,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:10:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:31,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:10:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:31,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:10:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:31,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:10:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:31,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:10:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:31,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-11-13 18:10:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:31,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:10:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:31,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2021-11-13 18:10:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 18:10:31,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:10:31,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319300222] [2021-11-13 18:10:31,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319300222] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:10:31,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322953844] [2021-11-13 18:10:31,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:31,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:10:31,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:10:31,453 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:10:31,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dff5663-f536-4f20-80b6-5a90dc3d5b52/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 18:10:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:31,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:10:31,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 18:10:32,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:10:32,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322953844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:10:32,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:10:32,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 18:10:32,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244620690] [2021-11-13 18:10:32,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:10:32,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:10:32,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:10:32,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:10:32,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:10:32,363 INFO L87 Difference]: Start difference. First operand 73815 states and 112326 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)