./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa --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 bd1fbff4a3c3c5ec96d6304a0f1ce261a19e0a6955e4877484b605d93c4e6183 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:43:14,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:43:14,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:43:14,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:43:14,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:43:14,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:43:14,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:43:14,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:43:14,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:43:14,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:43:14,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:43:14,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:43:14,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:43:14,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:43:14,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:43:14,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:43:14,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:43:14,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:43:14,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:43:14,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:43:14,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:43:14,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:43:14,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:43:14,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:43:14,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:43:14,455 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:43:14,455 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:43:14,457 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:43:14,457 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:43:14,458 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:43:14,458 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:43:14,459 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:43:14,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:43:14,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:43:14,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:43:14,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:43:14,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:43:14,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:43:14,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:43:14,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:43:14,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:43:14,466 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:43:14,485 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:43:14,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:43:14,485 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:43:14,485 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:43:14,486 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:43:14,486 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:43:14,487 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:43:14,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:43:14,487 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:43:14,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:43:14,487 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:43:14,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:43:14,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:43:14,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:43:14,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:43:14,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:43:14,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:43:14,488 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:43:14,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:43:14,488 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:43:14,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:43:14,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:43:14,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:43:14,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:43:14,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:43:14,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:43:14,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:43:14,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:43:14,489 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:43:14,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:43:14,490 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:43:14,490 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:43:14,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:43:14,490 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:43:14,490 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_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd1fbff4a3c3c5ec96d6304a0f1ce261a19e0a6955e4877484b605d93c4e6183 [2021-12-06 20:43:14,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:43:14,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:43:14,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:43:14,676 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:43:14,677 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:43:14,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c [2021-12-06 20:43:14,721 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/data/0fb16243e/e15e1b6946ec48c1bbba2bff79f572c8/FLAGea45f75f4 [2021-12-06 20:43:15,116 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:43:15,117 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c [2021-12-06 20:43:15,123 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/data/0fb16243e/e15e1b6946ec48c1bbba2bff79f572c8/FLAGea45f75f4 [2021-12-06 20:43:15,132 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/data/0fb16243e/e15e1b6946ec48c1bbba2bff79f572c8 [2021-12-06 20:43:15,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:43:15,134 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:43:15,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:43:15,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:43:15,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:43:15,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:43:15" (1/1) ... [2021-12-06 20:43:15,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b8dea27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:15, skipping insertion in model container [2021-12-06 20:43:15,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:43:15" (1/1) ... [2021-12-06 20:43:15,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:43:15,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:43:15,270 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[1998,2011] [2021-12-06 20:43:15,273 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[2392,2405] [2021-12-06 20:43:15,304 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:43:15,310 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:43:15,321 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[1998,2011] [2021-12-06 20:43:15,322 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[2392,2405] [2021-12-06 20:43:15,345 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:43:15,356 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:43:15,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:15 WrapperNode [2021-12-06 20:43:15,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:43:15,357 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:43:15,357 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:43:15,357 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:43:15,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:15" (1/1) ... [2021-12-06 20:43:15,370 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:15" (1/1) ... [2021-12-06 20:43:15,389 INFO L137 Inliner]: procedures = 27, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 169 [2021-12-06 20:43:15,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:43:15,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:43:15,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:43:15,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:43:15,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:15" (1/1) ... [2021-12-06 20:43:15,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:15" (1/1) ... [2021-12-06 20:43:15,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:15" (1/1) ... [2021-12-06 20:43:15,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:15" (1/1) ... [2021-12-06 20:43:15,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:15" (1/1) ... [2021-12-06 20:43:15,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:15" (1/1) ... [2021-12-06 20:43:15,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:15" (1/1) ... [2021-12-06 20:43:15,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:43:15,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:43:15,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:43:15,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:43:15,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:15" (1/1) ... [2021-12-06 20:43:15,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:43:15,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:15,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:43:15,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:43:15,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:43:15,476 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-12-06 20:43:15,476 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-12-06 20:43:15,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:43:15,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:43:15,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:43:15,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 20:43:15,477 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 20:43:15,541 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:43:15,543 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:43:15,751 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:43:15,760 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:43:15,760 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 20:43:15,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:43:15 BoogieIcfgContainer [2021-12-06 20:43:15,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:43:15,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:43:15,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:43:15,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:43:15,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:43:15" (1/3) ... [2021-12-06 20:43:15,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e4dcf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:43:15, skipping insertion in model container [2021-12-06 20:43:15,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:15" (2/3) ... [2021-12-06 20:43:15,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e4dcf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:43:15, skipping insertion in model container [2021-12-06 20:43:15,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:43:15" (3/3) ... [2021-12-06 20:43:15,769 INFO L111 eAbstractionObserver]: Analyzing ICFG square_5+soft_float_1-2a.c.cil.c [2021-12-06 20:43:15,773 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:43:15,773 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 20:43:15,814 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:43:15,821 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 [2021-12-06 20:43:15,821 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 20:43:15,839 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 68 states have (on average 1.588235294117647) internal successors, (108), 72 states have internal predecessors, (108), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 20:43:15,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 20:43:15,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:15,844 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:15,844 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:15,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:15,849 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-12-06 20:43:15,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:15,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250186597] [2021-12-06 20:43:15,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:15,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:15,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:43:15,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250186597] [2021-12-06 20:43:15,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250186597] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:43:15,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:43:15,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:43:15,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281481192] [2021-12-06 20:43:15,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:43:15,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 20:43:15,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:43:15,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 20:43:15,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:43:15,986 INFO L87 Difference]: Start difference. First operand has 81 states, 68 states have (on average 1.588235294117647) internal successors, (108), 72 states have internal predecessors, (108), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:16,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:16,010 INFO L93 Difference]: Finished difference Result 157 states and 248 transitions. [2021-12-06 20:43:16,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 20:43:16,011 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 20:43:16,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:16,018 INFO L225 Difference]: With dead ends: 157 [2021-12-06 20:43:16,018 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 20:43:16,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:43:16,024 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:16,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:43:16,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 20:43:16,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-06 20:43:16,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 65 states have internal predecessors, (92), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 20:43:16,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 107 transitions. [2021-12-06 20:43:16,057 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 107 transitions. Word has length 7 [2021-12-06 20:43:16,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:16,057 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 107 transitions. [2021-12-06 20:43:16,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:16,058 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 107 transitions. [2021-12-06 20:43:16,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 20:43:16,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:16,058 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:16,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 20:43:16,058 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:16,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:16,059 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-12-06 20:43:16,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:43:16,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135374910] [2021-12-06 20:43:16,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:16,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:43:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 20:43:16,074 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 20:43:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 20:43:16,094 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 20:43:16,095 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-06 20:43:16,096 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-06 20:43:16,097 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-06 20:43:16,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 20:43:16,100 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-06 20:43:16,102 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 20:43:16,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 08:43:16 BoogieIcfgContainer [2021-12-06 20:43:16,117 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 20:43:16,117 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 20:43:16,117 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 20:43:16,117 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 20:43:16,118 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:43:15" (3/4) ... [2021-12-06 20:43:16,120 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-06 20:43:16,120 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 20:43:16,121 INFO L158 Benchmark]: Toolchain (without parser) took 985.84ms. Allocated memory is still 146.8MB. Free memory was 121.6MB in the beginning and 62.3MB in the end (delta: 59.3MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. [2021-12-06 20:43:16,121 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 73.4MB. Free memory is still 42.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 20:43:16,121 INFO L158 Benchmark]: CACSL2BoogieTranslator took 221.18ms. Allocated memory is still 146.8MB. Free memory was 121.3MB in the beginning and 107.2MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-06 20:43:16,122 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.90ms. Allocated memory is still 146.8MB. Free memory was 107.2MB in the beginning and 104.9MB in the end (delta: 2.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 20:43:16,122 INFO L158 Benchmark]: Boogie Preprocessor took 23.41ms. Allocated memory is still 146.8MB. Free memory was 104.9MB in the beginning and 103.6MB in the end (delta: 1.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-06 20:43:16,122 INFO L158 Benchmark]: RCFGBuilder took 347.57ms. Allocated memory is still 146.8MB. Free memory was 103.4MB in the beginning and 88.0MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-06 20:43:16,123 INFO L158 Benchmark]: TraceAbstraction took 353.32ms. Allocated memory is still 146.8MB. Free memory was 87.5MB in the beginning and 62.6MB in the end (delta: 24.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2021-12-06 20:43:16,123 INFO L158 Benchmark]: Witness Printer took 2.74ms. Allocated memory is still 146.8MB. Free memory was 62.6MB in the beginning and 62.3MB in the end (delta: 283.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 20:43:16,125 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 73.4MB. Free memory is still 42.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 221.18ms. Allocated memory is still 146.8MB. Free memory was 121.3MB in the beginning and 107.2MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.90ms. Allocated memory is still 146.8MB. Free memory was 107.2MB in the beginning and 104.9MB in the end (delta: 2.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 23.41ms. Allocated memory is still 146.8MB. Free memory was 104.9MB in the beginning and 103.6MB in the end (delta: 1.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 347.57ms. Allocated memory is still 146.8MB. Free memory was 103.4MB in the beginning and 88.0MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 353.32ms. Allocated memory is still 146.8MB. Free memory was 87.5MB in the beginning and 62.6MB in the end (delta: 24.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Witness Printer took 2.74ms. Allocated memory is still 146.8MB. Free memory was 62.6MB in the beginning and 62.3MB in the end (delta: 283.3kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L403] COND TRUE __VERIFIER_nondet_int() [L404] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L47] COND TRUE !(result >= 0.0f && result < 1.3985f) VAL [IN=49, x=49] [L48] reach_error() VAL [IN=49, x=49] - UnprovableResult [Line: 61]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 81 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 116 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 116 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-06 20:43:16,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa --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 bd1fbff4a3c3c5ec96d6304a0f1ce261a19e0a6955e4877484b605d93c4e6183 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:43:17,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:43:17,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:43:17,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:43:17,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:43:17,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:43:17,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:43:17,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:43:17,899 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:43:17,900 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:43:17,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:43:17,902 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:43:17,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:43:17,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:43:17,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:43:17,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:43:17,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:43:17,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:43:17,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:43:17,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:43:17,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:43:17,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:43:17,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:43:17,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:43:17,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:43:17,919 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:43:17,919 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:43:17,920 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:43:17,921 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:43:17,922 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:43:17,922 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:43:17,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:43:17,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:43:17,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:43:17,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:43:17,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:43:17,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:43:17,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:43:17,933 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:43:17,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:43:17,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:43:17,935 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-06 20:43:17,963 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:43:17,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:43:17,963 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:43:17,964 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:43:17,964 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:43:17,965 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:43:17,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:43:17,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:43:17,966 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:43:17,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:43:17,966 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:43:17,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:43:17,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:43:17,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:43:17,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:43:17,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:43:17,967 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 20:43:17,968 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 20:43:17,968 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 20:43:17,968 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:43:17,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:43:17,968 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:43:17,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:43:17,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:43:17,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:43:17,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:43:17,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:43:17,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:43:17,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:43:17,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:43:17,970 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 20:43:17,970 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 20:43:17,971 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:43:17,971 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:43:17,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:43:17,971 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:43:17,971 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 20:43:17,972 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd1fbff4a3c3c5ec96d6304a0f1ce261a19e0a6955e4877484b605d93c4e6183 [2021-12-06 20:43:18,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:43:18,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:43:18,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:43:18,243 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:43:18,243 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:43:18,244 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c [2021-12-06 20:43:18,285 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/data/10f1787fa/487d995e2eb04a56b6889ca741966d8a/FLAG93ef26972 [2021-12-06 20:43:18,700 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:43:18,700 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c [2021-12-06 20:43:18,707 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/data/10f1787fa/487d995e2eb04a56b6889ca741966d8a/FLAG93ef26972 [2021-12-06 20:43:18,720 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/data/10f1787fa/487d995e2eb04a56b6889ca741966d8a [2021-12-06 20:43:18,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:43:18,723 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:43:18,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:43:18,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:43:18,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:43:18,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:43:18" (1/1) ... [2021-12-06 20:43:18,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49453f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:18, skipping insertion in model container [2021-12-06 20:43:18,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:43:18" (1/1) ... [2021-12-06 20:43:18,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:43:18,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:43:18,869 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[1998,2011] [2021-12-06 20:43:18,873 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[2392,2405] [2021-12-06 20:43:18,921 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:43:18,931 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:43:18,942 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[1998,2011] [2021-12-06 20:43:18,944 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[2392,2405] [2021-12-06 20:43:18,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:43:18,977 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:43:18,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:18 WrapperNode [2021-12-06 20:43:18,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:43:18,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:43:18,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:43:18,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:43:18,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:18" (1/1) ... [2021-12-06 20:43:18,994 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:18" (1/1) ... [2021-12-06 20:43:19,013 INFO L137 Inliner]: procedures = 28, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 165 [2021-12-06 20:43:19,013 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:43:19,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:43:19,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:43:19,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:43:19,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:18" (1/1) ... [2021-12-06 20:43:19,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:18" (1/1) ... [2021-12-06 20:43:19,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:18" (1/1) ... [2021-12-06 20:43:19,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:18" (1/1) ... [2021-12-06 20:43:19,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:18" (1/1) ... [2021-12-06 20:43:19,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:18" (1/1) ... [2021-12-06 20:43:19,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:18" (1/1) ... [2021-12-06 20:43:19,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:43:19,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:43:19,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:43:19,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:43:19,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:18" (1/1) ... [2021-12-06 20:43:19,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:43:19,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:43:19,068 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:43:19,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:43:19,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:43:19,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-06 20:43:19,098 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-12-06 20:43:19,099 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-12-06 20:43:19,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:43:19,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:43:19,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 20:43:19,099 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 20:43:19,159 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:43:19,161 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:43:21,597 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:43:21,603 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:43:21,604 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 20:43:21,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:43:21 BoogieIcfgContainer [2021-12-06 20:43:21,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:43:21,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:43:21,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:43:21,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:43:21,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:43:18" (1/3) ... [2021-12-06 20:43:21,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@854df8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:43:21, skipping insertion in model container [2021-12-06 20:43:21,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:43:18" (2/3) ... [2021-12-06 20:43:21,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@854df8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:43:21, skipping insertion in model container [2021-12-06 20:43:21,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:43:21" (3/3) ... [2021-12-06 20:43:21,611 INFO L111 eAbstractionObserver]: Analyzing ICFG square_5+soft_float_1-2a.c.cil.c [2021-12-06 20:43:21,615 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:43:21,615 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 20:43:21,648 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:43:21,653 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 [2021-12-06 20:43:21,653 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 20:43:21,665 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 68 states have (on average 1.588235294117647) internal successors, (108), 72 states have internal predecessors, (108), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 20:43:21,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 20:43:21,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:21,668 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:21,668 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:21,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:21,672 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-12-06 20:43:21,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:43:21,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410073861] [2021-12-06 20:43:21,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:21,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:43:21,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:43:21,682 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:43:21,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 20:43:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:43:22,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 20:43:22,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:43:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:22,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:43:22,168 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:43:22,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410073861] [2021-12-06 20:43:22,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410073861] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:43:22,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:43:22,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:43:22,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458175075] [2021-12-06 20:43:22,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:43:22,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 20:43:22,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:43:22,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 20:43:22,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:43:22,194 INFO L87 Difference]: Start difference. First operand has 81 states, 68 states have (on average 1.588235294117647) internal successors, (108), 72 states have internal predecessors, (108), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:22,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:43:22,215 INFO L93 Difference]: Finished difference Result 157 states and 248 transitions. [2021-12-06 20:43:22,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 20:43:22,217 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 20:43:22,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:43:22,223 INFO L225 Difference]: With dead ends: 157 [2021-12-06 20:43:22,223 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 20:43:22,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:43:22,229 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:43:22,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:43:22,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 20:43:22,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-06 20:43:22,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 65 states have internal predecessors, (92), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 20:43:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 107 transitions. [2021-12-06 20:43:22,259 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 107 transitions. Word has length 7 [2021-12-06 20:43:22,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:43:22,260 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 107 transitions. [2021-12-06 20:43:22,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:43:22,260 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 107 transitions. [2021-12-06 20:43:22,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 20:43:22,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:43:22,261 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:43:22,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:43:22,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:43:22,462 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:43:22,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:43:22,463 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-12-06 20:43:22,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:43:22,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146432019] [2021-12-06 20:43:22,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:43:22,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:43:22,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:43:22,467 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:43:22,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 20:52:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:39,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 20:52:39,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:52:53,928 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= |c_ULTIMATE.start_main1_~result~0#1| (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-12-06 20:53:44,084 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 2797.0 2000.0)))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from false [2021-12-06 20:53:46,129 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 2797.0 2000.0)))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from true [2021-12-06 20:53:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:53:46,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:53:46,129 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:53:46,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146432019] [2021-12-06 20:53:46,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146432019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:46,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:46,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:53:46,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990020103] [2021-12-06 20:53:46,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:46,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:53:46,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:53:46,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:53:46,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2021-12-06 20:53:46,132 INFO L87 Difference]: Start difference. First operand 74 states and 107 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:48,478 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 20:53:48,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:48,719 INFO L93 Difference]: Finished difference Result 74 states and 107 transitions. [2021-12-06 20:53:48,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:53:48,720 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 20:53:48,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:48,722 INFO L225 Difference]: With dead ends: 74 [2021-12-06 20:53:48,722 INFO L226 Difference]: Without dead ends: 69 [2021-12-06 20:53:48,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=18, Invalid=17, Unknown=3, NotChecked=18, Total=56 [2021-12-06 20:53:48,724 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 103 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:48,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 274 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 1 Unknown, 209 Unchecked, 2.4s Time] [2021-12-06 20:53:48,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-06 20:53:48,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-12-06 20:53:48,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 58 states have (on average 1.5) internal successors, (87), 60 states have internal predecessors, (87), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 20:53:48,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 102 transitions. [2021-12-06 20:53:48,737 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 102 transitions. Word has length 7 [2021-12-06 20:53:48,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:48,737 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 102 transitions. [2021-12-06 20:53:48,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:48,737 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 102 transitions. [2021-12-06 20:53:48,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 20:53:48,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:48,739 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:48,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 20:53:48,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:53:48,941 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:48,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:48,943 INFO L85 PathProgramCache]: Analyzing trace with hash -567365317, now seen corresponding path program 1 times [2021-12-06 20:53:48,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:53:48,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764820276] [2021-12-06 20:53:48,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:48,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:53:48,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:53:48,949 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:53:48,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 20:53:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:49,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 20:53:49,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:53:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 20:53:49,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:53:49,458 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 20:53:49,459 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:53:49,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764820276] [2021-12-06 20:53:49,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764820276] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:53:49,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:53:49,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-06 20:53:49,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109138280] [2021-12-06 20:53:49,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:53:49,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 20:53:49,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:53:49,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:53:49,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:53:49,462 INFO L87 Difference]: Start difference. First operand 69 states and 102 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:53:49,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:49,692 INFO L93 Difference]: Finished difference Result 162 states and 250 transitions. [2021-12-06 20:53:49,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:53:49,693 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2021-12-06 20:53:49,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:49,697 INFO L225 Difference]: With dead ends: 162 [2021-12-06 20:53:49,697 INFO L226 Difference]: Without dead ends: 118 [2021-12-06 20:53:49,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:53:49,700 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 58 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:49,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 738 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:53:49,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-06 20:53:49,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2021-12-06 20:53:49,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 67 states have (on average 1.4477611940298507) internal successors, (97), 69 states have internal predecessors, (97), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) [2021-12-06 20:53:49,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 121 transitions. [2021-12-06 20:53:49,715 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 121 transitions. Word has length 33 [2021-12-06 20:53:49,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:49,716 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 121 transitions. [2021-12-06 20:53:49,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:53:49,716 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 121 transitions. [2021-12-06 20:53:49,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 20:53:49,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:49,717 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:49,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 20:53:49,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:53:49,919 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:49,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:49,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1463451301, now seen corresponding path program 1 times [2021-12-06 20:53:49,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:53:49,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208694571] [2021-12-06 20:53:49,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:49,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:53:49,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:53:49,927 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:53:49,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 20:53:49,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:49,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 20:53:49,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:53:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 20:53:50,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:53:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 20:53:50,397 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:53:50,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208694571] [2021-12-06 20:53:50,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208694571] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:53:50,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:53:50,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-06 20:53:50,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887889138] [2021-12-06 20:53:50,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:53:50,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 20:53:50,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:53:50,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:53:50,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:53:50,399 INFO L87 Difference]: Start difference. First operand 81 states and 121 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:53:50,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:50,702 INFO L93 Difference]: Finished difference Result 179 states and 273 transitions. [2021-12-06 20:53:50,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:53:50,703 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-12-06 20:53:50,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:50,704 INFO L225 Difference]: With dead ends: 179 [2021-12-06 20:53:50,705 INFO L226 Difference]: Without dead ends: 132 [2021-12-06 20:53:50,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:53:50,706 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 56 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:50,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 460 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:53:50,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-06 20:53:50,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2021-12-06 20:53:50,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 104 states have (on average 1.4230769230769231) internal successors, (148), 105 states have internal predecessors, (148), 16 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (22), 18 states have call predecessors, (22), 15 states have call successors, (22) [2021-12-06 20:53:50,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 186 transitions. [2021-12-06 20:53:50,720 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 186 transitions. Word has length 37 [2021-12-06 20:53:50,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:50,721 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 186 transitions. [2021-12-06 20:53:50,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:53:50,721 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 186 transitions. [2021-12-06 20:53:50,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 20:53:50,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:50,723 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:50,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-06 20:53:50,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:53:50,925 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:50,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:50,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1205285863, now seen corresponding path program 1 times [2021-12-06 20:53:50,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:53:50,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23913720] [2021-12-06 20:53:50,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:50,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:53:50,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:53:50,930 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:53:50,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 20:53:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:50,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 20:53:50,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:53:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 20:53:51,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:53:51,183 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:53:51,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23913720] [2021-12-06 20:53:51,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23913720] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:51,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:51,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 20:53:51,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494804169] [2021-12-06 20:53:51,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:51,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 20:53:51,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:53:51,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:53:51,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:53:51,185 INFO L87 Difference]: Start difference. First operand 124 states and 186 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:53:51,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:51,508 INFO L93 Difference]: Finished difference Result 280 states and 423 transitions. [2021-12-06 20:53:51,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:53:51,509 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2021-12-06 20:53:51,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:51,512 INFO L225 Difference]: With dead ends: 280 [2021-12-06 20:53:51,512 INFO L226 Difference]: Without dead ends: 210 [2021-12-06 20:53:51,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:53:51,514 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 53 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:51,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 456 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:53:51,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-06 20:53:51,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 206. [2021-12-06 20:53:51,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 178 states have (on average 1.4157303370786516) internal successors, (252), 177 states have internal predecessors, (252), 24 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (30), 30 states have call predecessors, (30), 23 states have call successors, (30) [2021-12-06 20:53:51,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 306 transitions. [2021-12-06 20:53:51,533 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 306 transitions. Word has length 37 [2021-12-06 20:53:51,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:51,533 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 306 transitions. [2021-12-06 20:53:51,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:53:51,533 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 306 transitions. [2021-12-06 20:53:51,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 20:53:51,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:51,536 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:51,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-06 20:53:51,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:53:51,737 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:51,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:51,739 INFO L85 PathProgramCache]: Analyzing trace with hash -525227493, now seen corresponding path program 1 times [2021-12-06 20:53:51,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:53:51,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113985647] [2021-12-06 20:53:51,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:51,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:53:51,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:53:51,743 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:53:51,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 20:53:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:51,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 20:53:51,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:53:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 20:53:52,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:53:52,053 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:53:52,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113985647] [2021-12-06 20:53:52,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113985647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:52,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:52,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:53:52,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451565322] [2021-12-06 20:53:52,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:52,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:53:52,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:53:52,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:53:52,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:53:52,056 INFO L87 Difference]: Start difference. First operand 206 states and 306 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:53:52,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:52,528 INFO L93 Difference]: Finished difference Result 294 states and 440 transitions. [2021-12-06 20:53:52,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 20:53:52,529 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2021-12-06 20:53:52,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:52,531 INFO L225 Difference]: With dead ends: 294 [2021-12-06 20:53:52,532 INFO L226 Difference]: Without dead ends: 230 [2021-12-06 20:53:52,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 20:53:52,533 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 105 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:52,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 542 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:53:52,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-06 20:53:52,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2021-12-06 20:53:52,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 164 states have (on average 1.3902439024390243) internal successors, (228), 163 states have internal predecessors, (228), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (26), 26 states have call predecessors, (26), 19 states have call successors, (26) [2021-12-06 20:53:52,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 274 transitions. [2021-12-06 20:53:52,549 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 274 transitions. Word has length 37 [2021-12-06 20:53:52,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:52,550 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 274 transitions. [2021-12-06 20:53:52,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:53:52,550 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 274 transitions. [2021-12-06 20:53:52,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 20:53:52,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:52,553 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-06 20:53:52,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-06 20:53:52,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:53:52,755 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:52,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:52,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1910499068, now seen corresponding path program 1 times [2021-12-06 20:53:52,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:53:52,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137969393] [2021-12-06 20:53:52,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:52,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:53:52,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:53:52,760 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:53:52,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 20:53:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:52,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 20:53:52,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:53:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 20:53:53,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:53:53,425 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 20:53:53,425 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:53:53,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137969393] [2021-12-06 20:53:53,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137969393] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:53:53,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:53:53,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-12-06 20:53:53,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889037115] [2021-12-06 20:53:53,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:53:53,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:53:53,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:53:53,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:53:53,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:53:53,427 INFO L87 Difference]: Start difference. First operand 188 states and 274 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:53:54,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:54,074 INFO L93 Difference]: Finished difference Result 276 states and 410 transitions. [2021-12-06 20:53:54,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 20:53:54,075 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2021-12-06 20:53:54,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:54,077 INFO L225 Difference]: With dead ends: 276 [2021-12-06 20:53:54,077 INFO L226 Difference]: Without dead ends: 238 [2021-12-06 20:53:54,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:53:54,078 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 197 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:54,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 649 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:53:54,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-06 20:53:54,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 179. [2021-12-06 20:53:54,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 157 states have (on average 1.3821656050955413) internal successors, (217), 156 states have internal predecessors, (217), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (24), 24 states have call predecessors, (24), 17 states have call successors, (24) [2021-12-06 20:53:54,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 259 transitions. [2021-12-06 20:53:54,091 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 259 transitions. Word has length 41 [2021-12-06 20:53:54,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:54,092 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 259 transitions. [2021-12-06 20:53:54,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:53:54,092 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 259 transitions. [2021-12-06 20:53:54,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 20:53:54,094 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:54,094 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:54,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-06 20:53:54,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:53:54,296 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:54,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:54,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1938435092, now seen corresponding path program 1 times [2021-12-06 20:53:54,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:53:54,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163526105] [2021-12-06 20:53:54,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:54,299 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:53:54,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:53:54,302 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:53:54,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 20:53:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:54,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:53:54,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:53:54,504 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 20:53:54,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:53:54,505 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:53:54,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163526105] [2021-12-06 20:53:54,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163526105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:54,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:54,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:53:54,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998186527] [2021-12-06 20:53:54,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:54,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:53:54,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:53:54,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:53:54,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:53:54,506 INFO L87 Difference]: Start difference. First operand 179 states and 259 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:53:54,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:54,600 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2021-12-06 20:53:54,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:53:54,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-12-06 20:53:54,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:54,603 INFO L225 Difference]: With dead ends: 332 [2021-12-06 20:53:54,603 INFO L226 Difference]: Without dead ends: 266 [2021-12-06 20:53:54,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:53:54,604 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 68 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:54,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 328 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:53:54,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-06 20:53:54,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 234. [2021-12-06 20:53:54,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 210 states have (on average 1.3428571428571427) internal successors, (282), 209 states have internal predecessors, (282), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (26), 26 states have call predecessors, (26), 19 states have call successors, (26) [2021-12-06 20:53:54,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 328 transitions. [2021-12-06 20:53:54,618 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 328 transitions. Word has length 44 [2021-12-06 20:53:54,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:54,618 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 328 transitions. [2021-12-06 20:53:54,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:53:54,618 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 328 transitions. [2021-12-06 20:53:54,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 20:53:54,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:54,619 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:54,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-06 20:53:54,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:53:54,820 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:54,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:54,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1309251479, now seen corresponding path program 1 times [2021-12-06 20:53:54,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:53:54,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462631653] [2021-12-06 20:53:54,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:54,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:53:54,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:53:54,821 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:53:54,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 20:53:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:54,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:53:54,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:53:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 20:53:55,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:53:55,037 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:53:55,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462631653] [2021-12-06 20:53:55,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462631653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:55,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:55,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:53:55,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716076995] [2021-12-06 20:53:55,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:55,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:53:55,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:53:55,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:53:55,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:53:55,038 INFO L87 Difference]: Start difference. First operand 234 states and 328 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:53:55,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:55,222 INFO L93 Difference]: Finished difference Result 409 states and 570 transitions. [2021-12-06 20:53:55,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:53:55,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2021-12-06 20:53:55,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:55,224 INFO L225 Difference]: With dead ends: 409 [2021-12-06 20:53:55,225 INFO L226 Difference]: Without dead ends: 179 [2021-12-06 20:53:55,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:53:55,226 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 25 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:55,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 250 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:53:55,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-06 20:53:55,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 167. [2021-12-06 20:53:55,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 149 states have (on average 1.3020134228187918) internal successors, (194), 151 states have internal predecessors, (194), 13 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (18), 15 states have call predecessors, (18), 12 states have call successors, (18) [2021-12-06 20:53:55,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2021-12-06 20:53:55,241 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 225 transitions. Word has length 44 [2021-12-06 20:53:55,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:55,241 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 225 transitions. [2021-12-06 20:53:55,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:53:55,242 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 225 transitions. [2021-12-06 20:53:55,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 20:53:55,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:55,243 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:55,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-06 20:53:55,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:53:55,445 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:55,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:55,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1643290396, now seen corresponding path program 1 times [2021-12-06 20:53:55,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:53:55,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001324839] [2021-12-06 20:53:55,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:55,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:53:55,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:53:55,451 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:53:55,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 20:53:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:55,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 20:53:55,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:53:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 20:53:56,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:53:56,647 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 20:53:56,647 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:53:56,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001324839] [2021-12-06 20:53:56,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001324839] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 20:53:56,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:53:56,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-12-06 20:53:56,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825609487] [2021-12-06 20:53:56,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:56,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 20:53:56,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:53:56,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:53:56,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-06 20:53:56,649 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:53:57,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:57,818 INFO L93 Difference]: Finished difference Result 317 states and 456 transitions. [2021-12-06 20:53:57,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 20:53:57,819 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-12-06 20:53:57,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:57,822 INFO L225 Difference]: With dead ends: 317 [2021-12-06 20:53:57,822 INFO L226 Difference]: Without dead ends: 281 [2021-12-06 20:53:57,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-12-06 20:53:57,823 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 188 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:57,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 511 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 20:53:57,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-12-06 20:53:57,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 205. [2021-12-06 20:53:57,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 183 states have (on average 1.2950819672131149) internal successors, (237), 186 states have internal predecessors, (237), 17 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2021-12-06 20:53:57,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 276 transitions. [2021-12-06 20:53:57,841 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 276 transitions. Word has length 45 [2021-12-06 20:53:57,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:57,841 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 276 transitions. [2021-12-06 20:53:57,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:53:57,842 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 276 transitions. [2021-12-06 20:53:57,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 20:53:57,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:57,843 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:57,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-06 20:53:58,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:53:58,046 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:58,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:58,047 INFO L85 PathProgramCache]: Analyzing trace with hash -876669538, now seen corresponding path program 1 times [2021-12-06 20:53:58,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:53:58,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521784537] [2021-12-06 20:53:58,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:58,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:53:58,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:53:58,051 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:53:58,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 20:53:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:58,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:53:58,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:53:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 20:53:58,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:53:58,241 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:53:58,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521784537] [2021-12-06 20:53:58,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521784537] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:58,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:58,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:53:58,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19551044] [2021-12-06 20:53:58,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:58,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:53:58,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:53:58,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:53:58,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:53:58,243 INFO L87 Difference]: Start difference. First operand 205 states and 276 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:53:58,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:58,335 INFO L93 Difference]: Finished difference Result 212 states and 282 transitions. [2021-12-06 20:53:58,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:53:58,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-12-06 20:53:58,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:58,337 INFO L225 Difference]: With dead ends: 212 [2021-12-06 20:53:58,337 INFO L226 Difference]: Without dead ends: 205 [2021-12-06 20:53:58,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:53:58,338 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 5 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:58,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 383 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:53:58,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-06 20:53:58,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2021-12-06 20:53:58,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 183 states have (on average 1.278688524590164) internal successors, (234), 186 states have internal predecessors, (234), 17 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2021-12-06 20:53:58,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 273 transitions. [2021-12-06 20:53:58,349 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 273 transitions. Word has length 45 [2021-12-06 20:53:58,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:58,350 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 273 transitions. [2021-12-06 20:53:58,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:53:58,350 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 273 transitions. [2021-12-06 20:53:58,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 20:53:58,351 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:58,351 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-06 20:53:58,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-06 20:53:58,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:53:58,552 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:58,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:58,553 INFO L85 PathProgramCache]: Analyzing trace with hash 457064955, now seen corresponding path program 1 times [2021-12-06 20:53:58,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:53:58,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043721834] [2021-12-06 20:53:58,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:58,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:53:58,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:53:58,557 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:53:58,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 20:53:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:58,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 20:53:58,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:53:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 20:53:58,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:53:58,962 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:53:58,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043721834] [2021-12-06 20:53:58,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043721834] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:58,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:58,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 20:53:58,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949929656] [2021-12-06 20:53:58,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:58,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 20:53:58,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:53:58,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:53:58,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:53:58,965 INFO L87 Difference]: Start difference. First operand 205 states and 273 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:53:59,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:59,220 INFO L93 Difference]: Finished difference Result 248 states and 334 transitions. [2021-12-06 20:53:59,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:53:59,221 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-12-06 20:53:59,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:59,223 INFO L225 Difference]: With dead ends: 248 [2021-12-06 20:53:59,223 INFO L226 Difference]: Without dead ends: 246 [2021-12-06 20:53:59,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:53:59,224 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 38 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:59,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 597 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 10 Unchecked, 0.1s Time] [2021-12-06 20:53:59,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-06 20:53:59,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 209. [2021-12-06 20:53:59,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 186 states have (on average 1.2741935483870968) internal successors, (237), 189 states have internal predecessors, (237), 17 states have call successors, (17), 3 states have call predecessors, (17), 5 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2021-12-06 20:53:59,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 276 transitions. [2021-12-06 20:53:59,237 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 276 transitions. Word has length 45 [2021-12-06 20:53:59,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:59,237 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 276 transitions. [2021-12-06 20:53:59,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:53:59,237 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 276 transitions. [2021-12-06 20:53:59,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 20:53:59,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:59,238 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-06 20:53:59,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-06 20:53:59,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:53:59,439 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:59,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:59,439 INFO L85 PathProgramCache]: Analyzing trace with hash 514323257, now seen corresponding path program 1 times [2021-12-06 20:53:59,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:53:59,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817292372] [2021-12-06 20:53:59,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:59,440 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:53:59,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:53:59,441 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:53:59,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-06 20:53:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:59,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 20:53:59,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:53:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 20:53:59,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:53:59,783 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:53:59,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817292372] [2021-12-06 20:53:59,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817292372] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:59,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:59,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 20:53:59,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610565090] [2021-12-06 20:53:59,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:59,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 20:53:59,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:53:59,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:53:59,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:53:59,784 INFO L87 Difference]: Start difference. First operand 209 states and 276 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:54:00,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:00,006 INFO L93 Difference]: Finished difference Result 262 states and 350 transitions. [2021-12-06 20:54:00,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:54:00,007 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-12-06 20:54:00,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:00,009 INFO L225 Difference]: With dead ends: 262 [2021-12-06 20:54:00,009 INFO L226 Difference]: Without dead ends: 260 [2021-12-06 20:54:00,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:54:00,011 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 38 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:00,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 472 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2021-12-06 20:54:00,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-06 20:54:00,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 213. [2021-12-06 20:54:00,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 189 states have (on average 1.2698412698412698) internal successors, (240), 192 states have internal predecessors, (240), 17 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2021-12-06 20:54:00,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 279 transitions. [2021-12-06 20:54:00,031 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 279 transitions. Word has length 45 [2021-12-06 20:54:00,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:00,032 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 279 transitions. [2021-12-06 20:54:00,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:54:00,032 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 279 transitions. [2021-12-06 20:54:00,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 20:54:00,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:00,033 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-06 20:54:00,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-06 20:54:00,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:54:00,234 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:00,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:00,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1895517033, now seen corresponding path program 1 times [2021-12-06 20:54:00,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:54:00,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050967864] [2021-12-06 20:54:00,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:00,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:54:00,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:54:00,237 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:54:00,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 20:54:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:00,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:54:00,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 20:54:00,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:54:00,450 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:54:00,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050967864] [2021-12-06 20:54:00,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050967864] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:54:00,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:54:00,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:54:00,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747969577] [2021-12-06 20:54:00,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:54:00,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:54:00,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:54:00,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:54:00,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:54:00,452 INFO L87 Difference]: Start difference. First operand 213 states and 279 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:54:00,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:00,538 INFO L93 Difference]: Finished difference Result 352 states and 474 transitions. [2021-12-06 20:54:00,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:54:00,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2021-12-06 20:54:00,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:00,540 INFO L225 Difference]: With dead ends: 352 [2021-12-06 20:54:00,540 INFO L226 Difference]: Without dead ends: 300 [2021-12-06 20:54:00,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:54:00,541 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 77 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:00,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 315 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:54:00,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-06 20:54:00,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 232. [2021-12-06 20:54:00,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 207 states have (on average 1.2753623188405796) internal successors, (264), 209 states have internal predecessors, (264), 18 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (23), 20 states have call predecessors, (23), 17 states have call successors, (23) [2021-12-06 20:54:00,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 305 transitions. [2021-12-06 20:54:00,556 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 305 transitions. Word has length 46 [2021-12-06 20:54:00,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:00,556 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 305 transitions. [2021-12-06 20:54:00,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:54:00,556 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 305 transitions. [2021-12-06 20:54:00,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 20:54:00,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:00,557 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:54:00,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-06 20:54:00,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:54:00,757 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:00,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:00,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1657751029, now seen corresponding path program 1 times [2021-12-06 20:54:00,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:54:00,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200912894] [2021-12-06 20:54:00,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:00,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:54:00,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:54:00,759 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:54:00,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-06 20:54:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:00,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:54:00,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 20:54:00,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:54:00,933 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:54:00,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200912894] [2021-12-06 20:54:00,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200912894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:54:00,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:54:00,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:54:00,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931881665] [2021-12-06 20:54:00,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:54:00,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:54:00,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:54:00,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:54:00,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:54:00,935 INFO L87 Difference]: Start difference. First operand 232 states and 305 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:54:01,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:01,017 INFO L93 Difference]: Finished difference Result 247 states and 321 transitions. [2021-12-06 20:54:01,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:54:01,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2021-12-06 20:54:01,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:01,019 INFO L225 Difference]: With dead ends: 247 [2021-12-06 20:54:01,019 INFO L226 Difference]: Without dead ends: 208 [2021-12-06 20:54:01,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:54:01,020 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 1 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:01,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 285 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:54:01,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-06 20:54:01,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2021-12-06 20:54:01,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 183 states have (on average 1.289617486338798) internal successors, (236), 186 states have internal predecessors, (236), 18 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) [2021-12-06 20:54:01,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 275 transitions. [2021-12-06 20:54:01,033 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 275 transitions. Word has length 49 [2021-12-06 20:54:01,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:01,034 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 275 transitions. [2021-12-06 20:54:01,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:54:01,034 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 275 transitions. [2021-12-06 20:54:01,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 20:54:01,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:01,035 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:54:01,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-06 20:54:01,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:54:01,237 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:01,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:01,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1176937396, now seen corresponding path program 1 times [2021-12-06 20:54:01,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:54:01,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55930230] [2021-12-06 20:54:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:01,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:54:01,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:54:01,242 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:54:01,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-06 20:54:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:01,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 20:54:01,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 20:54:01,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:54:01,540 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:54:01,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55930230] [2021-12-06 20:54:01,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55930230] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:54:01,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:54:01,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:54:01,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608957347] [2021-12-06 20:54:01,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:54:01,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:54:01,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:54:01,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:54:01,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:54:01,542 INFO L87 Difference]: Start difference. First operand 208 states and 275 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:54:01,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:01,910 INFO L93 Difference]: Finished difference Result 335 states and 446 transitions. [2021-12-06 20:54:01,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 20:54:01,910 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-12-06 20:54:01,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:01,912 INFO L225 Difference]: With dead ends: 335 [2021-12-06 20:54:01,912 INFO L226 Difference]: Without dead ends: 293 [2021-12-06 20:54:01,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 20:54:01,913 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 216 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:01,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 405 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:54:01,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-12-06 20:54:01,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 208. [2021-12-06 20:54:01,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 183 states have (on average 1.278688524590164) internal successors, (234), 186 states have internal predecessors, (234), 18 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) [2021-12-06 20:54:01,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 273 transitions. [2021-12-06 20:54:01,931 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 273 transitions. Word has length 50 [2021-12-06 20:54:01,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:01,932 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 273 transitions. [2021-12-06 20:54:01,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:54:01,932 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 273 transitions. [2021-12-06 20:54:01,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 20:54:01,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:01,933 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:54:01,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-06 20:54:02,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:54:02,134 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:02,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:02,134 INFO L85 PathProgramCache]: Analyzing trace with hash -475872818, now seen corresponding path program 1 times [2021-12-06 20:54:02,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:54:02,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694772247] [2021-12-06 20:54:02,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:02,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:54:02,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:54:02,136 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:54:02,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-06 20:54:02,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:02,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:54:02,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:02,285 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 20:54:02,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:54:02,286 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:54:02,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694772247] [2021-12-06 20:54:02,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [694772247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:54:02,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:54:02,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:54:02,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332625840] [2021-12-06 20:54:02,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:54:02,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:54:02,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:54:02,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:54:02,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:54:02,287 INFO L87 Difference]: Start difference. First operand 208 states and 273 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:54:02,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:02,472 INFO L93 Difference]: Finished difference Result 326 states and 423 transitions. [2021-12-06 20:54:02,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:54:02,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-12-06 20:54:02,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:02,475 INFO L225 Difference]: With dead ends: 326 [2021-12-06 20:54:02,475 INFO L226 Difference]: Without dead ends: 295 [2021-12-06 20:54:02,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:54:02,476 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 113 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:02,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 261 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:54:02,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-12-06 20:54:02,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 212. [2021-12-06 20:54:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 187 states have (on average 1.2727272727272727) internal successors, (238), 190 states have internal predecessors, (238), 18 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) [2021-12-06 20:54:02,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 277 transitions. [2021-12-06 20:54:02,494 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 277 transitions. Word has length 50 [2021-12-06 20:54:02,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:02,495 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 277 transitions. [2021-12-06 20:54:02,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:54:02,495 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 277 transitions. [2021-12-06 20:54:02,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 20:54:02,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:02,496 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-06 20:54:02,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-06 20:54:02,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:54:02,698 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:02,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:02,699 INFO L85 PathProgramCache]: Analyzing trace with hash 33068664, now seen corresponding path program 1 times [2021-12-06 20:54:02,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:54:02,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570850315] [2021-12-06 20:54:02,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:02,700 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:54:02,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:54:02,703 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:54:02,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-06 20:54:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:02,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 20:54:02,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:03,063 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 20:54:03,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:54:03,064 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:54:03,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570850315] [2021-12-06 20:54:03,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570850315] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:54:03,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:54:03,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:54:03,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818549878] [2021-12-06 20:54:03,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:54:03,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:54:03,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:54:03,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:54:03,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:54:03,065 INFO L87 Difference]: Start difference. First operand 212 states and 277 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:54:04,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:04,033 INFO L93 Difference]: Finished difference Result 328 states and 444 transitions. [2021-12-06 20:54:04,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:54:04,034 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2021-12-06 20:54:04,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:04,036 INFO L225 Difference]: With dead ends: 328 [2021-12-06 20:54:04,036 INFO L226 Difference]: Without dead ends: 304 [2021-12-06 20:54:04,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:54:04,037 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 180 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:04,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 578 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 20:54:04,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-12-06 20:54:04,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 249. [2021-12-06 20:54:04,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 220 states have (on average 1.268181818181818) internal successors, (279), 224 states have internal predecessors, (279), 22 states have call successors, (22), 4 states have call predecessors, (22), 6 states have return successors, (25), 23 states have call predecessors, (25), 21 states have call successors, (25) [2021-12-06 20:54:04,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 326 transitions. [2021-12-06 20:54:04,055 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 326 transitions. Word has length 51 [2021-12-06 20:54:04,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:04,055 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 326 transitions. [2021-12-06 20:54:04,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:54:04,055 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 326 transitions. [2021-12-06 20:54:04,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 20:54:04,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:04,056 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-06 20:54:04,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-06 20:54:04,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:54:04,257 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:04,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:04,259 INFO L85 PathProgramCache]: Analyzing trace with hash 2004133062, now seen corresponding path program 1 times [2021-12-06 20:54:04,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:54:04,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512475752] [2021-12-06 20:54:04,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:04,260 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:54:04,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:54:04,263 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:54:04,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-06 20:54:04,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:04,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:54:04,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 20:54:04,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:54:04,486 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:54:04,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512475752] [2021-12-06 20:54:04,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512475752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:54:04,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:54:04,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:54:04,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514919557] [2021-12-06 20:54:04,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:54:04,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:54:04,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:54:04,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:54:04,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:54:04,488 INFO L87 Difference]: Start difference. First operand 249 states and 326 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:54:04,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:04,582 INFO L93 Difference]: Finished difference Result 302 states and 390 transitions. [2021-12-06 20:54:04,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:54:04,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2021-12-06 20:54:04,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:04,585 INFO L225 Difference]: With dead ends: 302 [2021-12-06 20:54:04,585 INFO L226 Difference]: Without dead ends: 268 [2021-12-06 20:54:04,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:54:04,586 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 87 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:04,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 273 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:54:04,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-12-06 20:54:04,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 249. [2021-12-06 20:54:04,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 220 states have (on average 1.2136363636363636) internal successors, (267), 224 states have internal predecessors, (267), 22 states have call successors, (22), 4 states have call predecessors, (22), 6 states have return successors, (25), 23 states have call predecessors, (25), 21 states have call successors, (25) [2021-12-06 20:54:04,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 314 transitions. [2021-12-06 20:54:04,602 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 314 transitions. Word has length 51 [2021-12-06 20:54:04,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:04,602 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 314 transitions. [2021-12-06 20:54:04,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:54:04,603 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 314 transitions. [2021-12-06 20:54:04,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 20:54:04,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:04,604 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-06 20:54:04,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-12-06 20:54:04,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:54:04,805 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:04,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:04,806 INFO L85 PathProgramCache]: Analyzing trace with hash -2071979516, now seen corresponding path program 1 times [2021-12-06 20:54:04,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:54:04,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448450941] [2021-12-06 20:54:04,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:04,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:54:04,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:54:04,811 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:54:04,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-06 20:54:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:04,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:54:04,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 20:54:04,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:54:04,981 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:54:04,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448450941] [2021-12-06 20:54:04,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448450941] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:54:04,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:54:04,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:54:04,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721653802] [2021-12-06 20:54:04,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:54:04,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:54:04,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:54:04,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:54:04,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:54:04,982 INFO L87 Difference]: Start difference. First operand 249 states and 314 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:54:05,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:05,047 INFO L93 Difference]: Finished difference Result 258 states and 322 transitions. [2021-12-06 20:54:05,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:54:05,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2021-12-06 20:54:05,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:05,049 INFO L225 Difference]: With dead ends: 258 [2021-12-06 20:54:05,050 INFO L226 Difference]: Without dead ends: 213 [2021-12-06 20:54:05,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:54:05,051 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:05,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 282 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:54:05,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-12-06 20:54:05,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 207. [2021-12-06 20:54:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 181 states have (on average 1.2209944751381216) internal successors, (221), 186 states have internal predecessors, (221), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (19), 18 states have call predecessors, (19), 17 states have call successors, (19) [2021-12-06 20:54:05,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 259 transitions. [2021-12-06 20:54:05,064 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 259 transitions. Word has length 51 [2021-12-06 20:54:05,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:05,064 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 259 transitions. [2021-12-06 20:54:05,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:54:05,064 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 259 transitions. [2021-12-06 20:54:05,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 20:54:05,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:05,066 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-06 20:54:05,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-12-06 20:54:05,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:54:05,267 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:05,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:05,268 INFO L85 PathProgramCache]: Analyzing trace with hash 447980418, now seen corresponding path program 1 times [2021-12-06 20:54:05,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:54:05,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008236748] [2021-12-06 20:54:05,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:05,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:54:05,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:54:05,272 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:54:05,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-06 20:54:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:05,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 20:54:05,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 20:54:05,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:54:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 20:54:06,157 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:54:06,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008236748] [2021-12-06 20:54:06,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008236748] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:54:06,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:54:06,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-12-06 20:54:06,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480535013] [2021-12-06 20:54:06,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:54:06,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:54:06,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:54:06,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:54:06,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:54:06,159 INFO L87 Difference]: Start difference. First operand 207 states and 259 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:54:06,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:06,600 INFO L93 Difference]: Finished difference Result 232 states and 286 transitions. [2021-12-06 20:54:06,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:54:06,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2021-12-06 20:54:06,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:06,602 INFO L225 Difference]: With dead ends: 232 [2021-12-06 20:54:06,602 INFO L226 Difference]: Without dead ends: 201 [2021-12-06 20:54:06,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 20:54:06,603 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 78 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:06,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 568 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:54:06,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-06 20:54:06,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 185. [2021-12-06 20:54:06,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 159 states have (on average 1.2264150943396226) internal successors, (195), 165 states have internal predecessors, (195), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-12-06 20:54:06,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 233 transitions. [2021-12-06 20:54:06,616 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 233 transitions. Word has length 51 [2021-12-06 20:54:06,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:06,616 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 233 transitions. [2021-12-06 20:54:06,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:54:06,617 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 233 transitions. [2021-12-06 20:54:06,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 20:54:06,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:06,617 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-06 20:54:06,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-06 20:54:06,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:54:06,818 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:06,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:06,818 INFO L85 PathProgramCache]: Analyzing trace with hash -826993692, now seen corresponding path program 1 times [2021-12-06 20:54:06,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:54:06,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593509066] [2021-12-06 20:54:06,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:06,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:54:06,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:54:06,819 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:54:06,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-06 20:54:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:06,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 20:54:06,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 20:54:07,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:54:07,084 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:54:07,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1593509066] [2021-12-06 20:54:07,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1593509066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:54:07,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:54:07,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 20:54:07,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56048395] [2021-12-06 20:54:07,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:54:07,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 20:54:07,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:54:07,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:54:07,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:54:07,086 INFO L87 Difference]: Start difference. First operand 185 states and 233 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:54:07,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:07,829 INFO L93 Difference]: Finished difference Result 271 states and 349 transitions. [2021-12-06 20:54:07,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:54:07,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2021-12-06 20:54:07,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:07,831 INFO L225 Difference]: With dead ends: 271 [2021-12-06 20:54:07,831 INFO L226 Difference]: Without dead ends: 222 [2021-12-06 20:54:07,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 20:54:07,832 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 89 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:07,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 532 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:54:07,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-06 20:54:07,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 159. [2021-12-06 20:54:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 133 states have (on average 1.2481203007518797) internal successors, (166), 139 states have internal predecessors, (166), 20 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-06 20:54:07,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 204 transitions. [2021-12-06 20:54:07,851 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 204 transitions. Word has length 53 [2021-12-06 20:54:07,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:07,851 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 204 transitions. [2021-12-06 20:54:07,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:54:07,852 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 204 transitions. [2021-12-06 20:54:07,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 20:54:07,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:07,853 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:54:07,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-06 20:54:08,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:54:08,053 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:08,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:08,054 INFO L85 PathProgramCache]: Analyzing trace with hash 841846950, now seen corresponding path program 1 times [2021-12-06 20:54:08,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:54:08,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588718368] [2021-12-06 20:54:08,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:08,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:54:08,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:54:08,055 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:54:08,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-06 20:54:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:08,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 20:54:08,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 20:54:11,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:54:11,214 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:54:11,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588718368] [2021-12-06 20:54:11,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588718368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:54:11,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:54:11,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 20:54:11,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342694177] [2021-12-06 20:54:11,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:54:11,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:54:11,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:54:11,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:54:11,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2021-12-06 20:54:11,216 INFO L87 Difference]: Start difference. First operand 159 states and 204 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 20:54:11,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:11,308 INFO L93 Difference]: Finished difference Result 168 states and 215 transitions. [2021-12-06 20:54:11,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 20:54:11,309 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2021-12-06 20:54:11,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:11,310 INFO L225 Difference]: With dead ends: 168 [2021-12-06 20:54:11,310 INFO L226 Difference]: Without dead ends: 166 [2021-12-06 20:54:11,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=22, Invalid=49, Unknown=1, NotChecked=0, Total=72 [2021-12-06 20:54:11,311 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 9 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:11,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 425 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2021-12-06 20:54:11,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-06 20:54:11,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-12-06 20:54:11,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 136 states have (on average 1.2426470588235294) internal successors, (169), 145 states have internal predecessors, (169), 23 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (21), 16 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-06 20:54:11,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 213 transitions. [2021-12-06 20:54:11,330 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 213 transitions. Word has length 55 [2021-12-06 20:54:11,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:11,331 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 213 transitions. [2021-12-06 20:54:11,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 20:54:11,331 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 213 transitions. [2021-12-06 20:54:11,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 20:54:11,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:11,333 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:54:11,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-06 20:54:11,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:54:11,534 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:11,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:11,541 INFO L85 PathProgramCache]: Analyzing trace with hash 12170841, now seen corresponding path program 1 times [2021-12-06 20:54:11,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:54:11,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175551770] [2021-12-06 20:54:11,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:11,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:54:11,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:54:11,545 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:54:11,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-06 20:54:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:11,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 20:54:11,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 20:54:18,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:54:18,700 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:54:18,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175551770] [2021-12-06 20:54:18,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175551770] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:54:18,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:54:18,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 20:54:18,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003716765] [2021-12-06 20:54:18,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:54:18,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:54:18,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:54:18,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:54:18,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=37, Unknown=2, NotChecked=0, Total=56 [2021-12-06 20:54:18,703 INFO L87 Difference]: Start difference. First operand 166 states and 213 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 20:54:18,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:18,805 INFO L93 Difference]: Finished difference Result 213 states and 272 transitions. [2021-12-06 20:54:18,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 20:54:18,806 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2021-12-06 20:54:18,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:18,807 INFO L225 Difference]: With dead ends: 213 [2021-12-06 20:54:18,807 INFO L226 Difference]: Without dead ends: 211 [2021-12-06 20:54:18,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=21, Invalid=49, Unknown=2, NotChecked=0, Total=72 [2021-12-06 20:54:18,808 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 39 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:18,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 555 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 63 Unchecked, 0.0s Time] [2021-12-06 20:54:18,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-06 20:54:18,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 163. [2021-12-06 20:54:18,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 136 states have (on average 1.2426470588235294) internal successors, (169), 142 states have internal predecessors, (169), 20 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-06 20:54:18,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 207 transitions. [2021-12-06 20:54:18,822 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 207 transitions. Word has length 56 [2021-12-06 20:54:18,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:18,822 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 207 transitions. [2021-12-06 20:54:18,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 20:54:18,823 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 207 transitions. [2021-12-06 20:54:18,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 20:54:18,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:18,823 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:54:18,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-06 20:54:19,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:54:19,025 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:19,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:19,026 INFO L85 PathProgramCache]: Analyzing trace with hash 590846065, now seen corresponding path program 1 times [2021-12-06 20:54:19,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:54:19,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799629134] [2021-12-06 20:54:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:19,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:54:19,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:54:19,029 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:54:19,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-06 20:54:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:19,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 20:54:19,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:20,402 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 20:54:20,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:54:20,402 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:54:20,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799629134] [2021-12-06 20:54:20,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799629134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:54:20,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:54:20,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-06 20:54:20,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341239546] [2021-12-06 20:54:20,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:54:20,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 20:54:20,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:54:20,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 20:54:20,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-12-06 20:54:20,404 INFO L87 Difference]: Start difference. First operand 163 states and 207 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 20:54:24,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:24,263 INFO L93 Difference]: Finished difference Result 238 states and 304 transitions. [2021-12-06 20:54:24,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 20:54:24,265 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2021-12-06 20:54:24,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:24,266 INFO L225 Difference]: With dead ends: 238 [2021-12-06 20:54:24,266 INFO L226 Difference]: Without dead ends: 226 [2021-12-06 20:54:24,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-12-06 20:54:24,267 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 164 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:24,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 1091 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 20:54:24,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-12-06 20:54:24,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 163. [2021-12-06 20:54:24,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 136 states have (on average 1.2279411764705883) internal successors, (167), 142 states have internal predecessors, (167), 20 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-06 20:54:24,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 205 transitions. [2021-12-06 20:54:24,285 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 205 transitions. Word has length 59 [2021-12-06 20:54:24,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:24,285 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 205 transitions. [2021-12-06 20:54:24,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 20:54:24,285 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 205 transitions. [2021-12-06 20:54:24,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 20:54:24,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:24,286 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:54:24,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-12-06 20:54:24,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:54:24,487 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:24,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:24,488 INFO L85 PathProgramCache]: Analyzing trace with hash -407457257, now seen corresponding path program 1 times [2021-12-06 20:54:24,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:54:24,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434462882] [2021-12-06 20:54:24,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:24,490 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:54:24,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:54:24,492 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:54:24,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-06 20:54:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:24,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 20:54:24,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 20:54:24,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:54:24,741 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:54:24,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434462882] [2021-12-06 20:54:24,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434462882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:54:24,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:54:24,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 20:54:24,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088406853] [2021-12-06 20:54:24,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:54:24,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 20:54:24,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:54:24,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:54:24,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:54:24,744 INFO L87 Difference]: Start difference. First operand 163 states and 205 transitions. Second operand has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 20:54:24,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:24,936 INFO L93 Difference]: Finished difference Result 182 states and 225 transitions. [2021-12-06 20:54:24,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:54:24,936 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 61 [2021-12-06 20:54:24,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:24,937 INFO L225 Difference]: With dead ends: 182 [2021-12-06 20:54:24,937 INFO L226 Difference]: Without dead ends: 180 [2021-12-06 20:54:24,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:54:24,938 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 40 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:24,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 507 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:54:24,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-06 20:54:24,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2021-12-06 20:54:24,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 139 states have (on average 1.223021582733813) internal successors, (170), 145 states have internal predecessors, (170), 20 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-06 20:54:24,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 208 transitions. [2021-12-06 20:54:24,953 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 208 transitions. Word has length 61 [2021-12-06 20:54:24,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:24,953 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 208 transitions. [2021-12-06 20:54:24,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 20:54:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 208 transitions. [2021-12-06 20:54:24,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 20:54:24,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:24,954 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:54:24,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-06 20:54:25,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:54:25,155 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:25,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:25,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1933907116, now seen corresponding path program 1 times [2021-12-06 20:54:25,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:54:25,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292155105] [2021-12-06 20:54:25,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:25,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:54:25,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:54:25,158 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:54:25,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-06 20:54:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:25,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 20:54:25,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 20:54:26,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:54:26,309 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:54:26,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292155105] [2021-12-06 20:54:26,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292155105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:54:26,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:54:26,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-06 20:54:26,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799352575] [2021-12-06 20:54:26,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:54:26,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 20:54:26,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:54:26,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 20:54:26,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:54:26,312 INFO L87 Difference]: Start difference. First operand 167 states and 208 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 20:54:30,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:30,618 INFO L93 Difference]: Finished difference Result 432 states and 559 transitions. [2021-12-06 20:54:30,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 20:54:30,620 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2021-12-06 20:54:30,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:30,622 INFO L225 Difference]: With dead ends: 432 [2021-12-06 20:54:30,622 INFO L226 Difference]: Without dead ends: 400 [2021-12-06 20:54:30,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-12-06 20:54:30,624 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 460 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:30,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 1025 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 20:54:30,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-12-06 20:54:30,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 197. [2021-12-06 20:54:30,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 166 states have (on average 1.2048192771084338) internal successors, (200), 173 states have internal predecessors, (200), 23 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-06 20:54:30,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 244 transitions. [2021-12-06 20:54:30,645 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 244 transitions. Word has length 61 [2021-12-06 20:54:30,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:30,645 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 244 transitions. [2021-12-06 20:54:30,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 20:54:30,645 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 244 transitions. [2021-12-06 20:54:30,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 20:54:30,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:30,646 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:54:30,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-12-06 20:54:30,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:54:30,847 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:30,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:30,849 INFO L85 PathProgramCache]: Analyzing trace with hash -131344237, now seen corresponding path program 1 times [2021-12-06 20:54:30,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:54:30,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834976670] [2021-12-06 20:54:30,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:30,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:54:30,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:54:30,853 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:54:30,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-06 20:54:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:30,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 20:54:30,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:31,092 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 20:54:31,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:54:31,093 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:54:31,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834976670] [2021-12-06 20:54:31,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834976670] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:54:31,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:54:31,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 20:54:31,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261313549] [2021-12-06 20:54:31,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:54:31,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 20:54:31,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:54:31,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:54:31,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:54:31,095 INFO L87 Difference]: Start difference. First operand 197 states and 244 transitions. Second operand has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 20:54:31,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:31,318 INFO L93 Difference]: Finished difference Result 219 states and 270 transitions. [2021-12-06 20:54:31,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:54:31,319 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 61 [2021-12-06 20:54:31,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:31,320 INFO L225 Difference]: With dead ends: 219 [2021-12-06 20:54:31,321 INFO L226 Difference]: Without dead ends: 217 [2021-12-06 20:54:31,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:54:31,321 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 34 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:31,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 504 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:54:31,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-12-06 20:54:31,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 202. [2021-12-06 20:54:31,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 169 states have (on average 1.2011834319526626) internal successors, (203), 177 states have internal predecessors, (203), 24 states have call successors, (24), 7 states have call predecessors, (24), 8 states have return successors, (22), 19 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 20:54:31,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 249 transitions. [2021-12-06 20:54:31,342 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 249 transitions. Word has length 61 [2021-12-06 20:54:31,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:31,342 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 249 transitions. [2021-12-06 20:54:31,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 20:54:31,342 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 249 transitions. [2021-12-06 20:54:31,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 20:54:31,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:31,343 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-06 20:54:31,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-06 20:54:31,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:54:31,544 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:31,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:31,544 INFO L85 PathProgramCache]: Analyzing trace with hash -943451417, now seen corresponding path program 1 times [2021-12-06 20:54:31,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:54:31,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053826088] [2021-12-06 20:54:31,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:31,544 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:54:31,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:54:31,545 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:54:31,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-06 20:54:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:31,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 20:54:31,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 20:54:34,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:54:34,128 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:54:34,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053826088] [2021-12-06 20:54:34,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053826088] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:54:34,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:54:34,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-06 20:54:34,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261266936] [2021-12-06 20:54:34,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:54:34,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 20:54:34,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:54:34,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 20:54:34,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-12-06 20:54:34,129 INFO L87 Difference]: Start difference. First operand 202 states and 249 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 20:54:34,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:34,591 INFO L93 Difference]: Finished difference Result 364 states and 461 transitions. [2021-12-06 20:54:34,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 20:54:34,592 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2021-12-06 20:54:34,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:34,594 INFO L225 Difference]: With dead ends: 364 [2021-12-06 20:54:34,594 INFO L226 Difference]: Without dead ends: 344 [2021-12-06 20:54:34,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-12-06 20:54:34,595 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 66 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 493 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:34,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1314 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 493 Unchecked, 0.2s Time] [2021-12-06 20:54:34,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-12-06 20:54:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 210. [2021-12-06 20:54:34,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 176 states have (on average 1.2045454545454546) internal successors, (212), 184 states have internal predecessors, (212), 25 states have call successors, (25), 7 states have call predecessors, (25), 8 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-06 20:54:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 260 transitions. [2021-12-06 20:54:34,617 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 260 transitions. Word has length 66 [2021-12-06 20:54:34,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:34,617 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 260 transitions. [2021-12-06 20:54:34,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 20:54:34,617 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 260 transitions. [2021-12-06 20:54:34,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 20:54:34,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:34,618 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-06 20:54:34,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-12-06 20:54:34,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:54:34,818 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:34,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:34,819 INFO L85 PathProgramCache]: Analyzing trace with hash 979776617, now seen corresponding path program 1 times [2021-12-06 20:54:34,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:54:34,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50354676] [2021-12-06 20:54:34,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:34,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:54:34,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:54:34,820 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:54:34,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-06 20:54:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:34,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 20:54:34,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 20:54:36,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:54:36,311 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:54:36,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50354676] [2021-12-06 20:54:36,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50354676] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:54:36,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:54:36,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 20:54:36,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600310643] [2021-12-06 20:54:36,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:54:36,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 20:54:36,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:54:36,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 20:54:36,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:54:36,313 INFO L87 Difference]: Start difference. First operand 210 states and 260 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 20:54:36,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:36,585 INFO L93 Difference]: Finished difference Result 263 states and 325 transitions. [2021-12-06 20:54:36,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 20:54:36,586 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2021-12-06 20:54:36,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:36,588 INFO L225 Difference]: With dead ends: 263 [2021-12-06 20:54:36,588 INFO L226 Difference]: Without dead ends: 243 [2021-12-06 20:54:36,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-12-06 20:54:36,589 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 8 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:36,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 597 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 133 Unchecked, 0.1s Time] [2021-12-06 20:54:36,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-06 20:54:36,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 209. [2021-12-06 20:54:36,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 175 states have (on average 1.2) internal successors, (210), 183 states have internal predecessors, (210), 25 states have call successors, (25), 7 states have call predecessors, (25), 8 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-06 20:54:36,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 258 transitions. [2021-12-06 20:54:36,610 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 258 transitions. Word has length 66 [2021-12-06 20:54:36,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:36,610 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 258 transitions. [2021-12-06 20:54:36,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 20:54:36,611 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 258 transitions. [2021-12-06 20:54:36,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 20:54:36,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:36,611 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-06 20:54:36,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-12-06 20:54:36,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:54:36,812 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:36,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:36,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1210749100, now seen corresponding path program 1 times [2021-12-06 20:54:36,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:54:36,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104375212] [2021-12-06 20:54:36,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:36,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:54:36,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:54:36,814 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:54:36,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-06 20:54:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:36,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 20:54:36,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 20:54:42,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:54:44,308 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:54:44,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104375212] [2021-12-06 20:54:44,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104375212] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:54:44,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [921875230] [2021-12-06 20:54:44,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:44,309 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 20:54:44,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 20:54:44,310 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 20:54:44,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-12-06 20:54:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:44,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 20:54:44,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 20:54:49,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:54:49,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [921875230] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:54:49,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:54:49,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [12] total 21 [2021-12-06 20:54:49,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591537329] [2021-12-06 20:54:49,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:54:49,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 20:54:49,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:54:49,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 20:54:49,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=531, Unknown=2, NotChecked=0, Total=600 [2021-12-06 20:54:49,924 INFO L87 Difference]: Start difference. First operand 209 states and 258 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 20:54:50,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:50,646 INFO L93 Difference]: Finished difference Result 359 states and 450 transitions. [2021-12-06 20:54:50,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 20:54:50,647 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 67 [2021-12-06 20:54:50,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:50,649 INFO L225 Difference]: With dead ends: 359 [2021-12-06 20:54:50,649 INFO L226 Difference]: Without dead ends: 339 [2021-12-06 20:54:50,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=81, Invalid=619, Unknown=2, NotChecked=0, Total=702 [2021-12-06 20:54:50,650 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 84 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 435 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:50,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 1300 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 435 Unchecked, 0.2s Time] [2021-12-06 20:54:50,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-12-06 20:54:50,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 211. [2021-12-06 20:54:50,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 177 states have (on average 1.2090395480225988) internal successors, (214), 185 states have internal predecessors, (214), 25 states have call successors, (25), 7 states have call predecessors, (25), 8 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-06 20:54:50,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 262 transitions. [2021-12-06 20:54:50,674 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 262 transitions. Word has length 67 [2021-12-06 20:54:50,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:50,675 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 262 transitions. [2021-12-06 20:54:50,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 20:54:50,675 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 262 transitions. [2021-12-06 20:54:50,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 20:54:50,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:50,676 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-06 20:54:50,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-12-06 20:54:50,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-12-06 20:54:51,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 20:54:51,078 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:51,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:51,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1980026946, now seen corresponding path program 1 times [2021-12-06 20:54:51,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:54:51,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766341736] [2021-12-06 20:54:51,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:51,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:54:51,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:54:51,081 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:54:51,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-06 20:54:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:51,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 20:54:51,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 20:54:52,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:54:52,703 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:54:52,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766341736] [2021-12-06 20:54:52,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766341736] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:54:52,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:54:52,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-06 20:54:52,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238304851] [2021-12-06 20:54:52,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:54:52,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 20:54:52,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:54:52,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 20:54:52,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:54:52,705 INFO L87 Difference]: Start difference. First operand 211 states and 262 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 20:54:56,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:54:56,469 INFO L93 Difference]: Finished difference Result 314 states and 391 transitions. [2021-12-06 20:54:56,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 20:54:56,470 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 67 [2021-12-06 20:54:56,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:54:56,472 INFO L225 Difference]: With dead ends: 314 [2021-12-06 20:54:56,472 INFO L226 Difference]: Without dead ends: 306 [2021-12-06 20:54:56,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-12-06 20:54:56,473 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 175 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:54:56,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 781 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 20:54:56,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-12-06 20:54:56,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 212. [2021-12-06 20:54:56,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 178 states have (on average 1.202247191011236) internal successors, (214), 186 states have internal predecessors, (214), 25 states have call successors, (25), 7 states have call predecessors, (25), 8 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-06 20:54:56,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 262 transitions. [2021-12-06 20:54:56,500 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 262 transitions. Word has length 67 [2021-12-06 20:54:56,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:54:56,500 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 262 transitions. [2021-12-06 20:54:56,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 20:54:56,500 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 262 transitions. [2021-12-06 20:54:56,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 20:54:56,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:54:56,501 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-06 20:54:56,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-12-06 20:54:56,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:54:56,702 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:54:56,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:54:56,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1720222190, now seen corresponding path program 1 times [2021-12-06 20:54:56,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:54:56,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009238754] [2021-12-06 20:54:56,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:54:56,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:54:56,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:54:56,707 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:54:56,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-12-06 20:54:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:56,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 20:54:56,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 20:55:00,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:55:00,903 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:55:00,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009238754] [2021-12-06 20:55:00,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009238754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:55:00,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:55:00,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 20:55:00,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466511205] [2021-12-06 20:55:00,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:55:00,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:55:00,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:55:00,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:55:00,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:55:00,904 INFO L87 Difference]: Start difference. First operand 212 states and 262 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 20:55:02,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:02,675 INFO L93 Difference]: Finished difference Result 352 states and 438 transitions. [2021-12-06 20:55:02,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 20:55:02,676 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 67 [2021-12-06 20:55:02,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:02,678 INFO L225 Difference]: With dead ends: 352 [2021-12-06 20:55:02,678 INFO L226 Difference]: Without dead ends: 332 [2021-12-06 20:55:02,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-12-06 20:55:02,679 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 137 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:02,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 758 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 143 Unchecked, 0.4s Time] [2021-12-06 20:55:02,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-12-06 20:55:02,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 202. [2021-12-06 20:55:02,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 170 states have (on average 1.188235294117647) internal successors, (202), 177 states have internal predecessors, (202), 23 states have call successors, (23), 7 states have call predecessors, (23), 8 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-06 20:55:02,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 246 transitions. [2021-12-06 20:55:02,703 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 246 transitions. Word has length 67 [2021-12-06 20:55:02,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:02,703 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 246 transitions. [2021-12-06 20:55:02,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 20:55:02,704 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 246 transitions. [2021-12-06 20:55:02,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 20:55:02,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:02,705 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-06 20:55:02,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-12-06 20:55:02,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:55:02,905 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:02,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:02,905 INFO L85 PathProgramCache]: Analyzing trace with hash -7943642, now seen corresponding path program 1 times [2021-12-06 20:55:02,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:55:02,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260235535] [2021-12-06 20:55:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:02,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:55:02,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:55:02,906 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:55:02,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-06 20:55:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:02,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 20:55:02,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:03,110 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 20:55:03,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:55:03,110 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:55:03,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260235535] [2021-12-06 20:55:03,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260235535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:55:03,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:55:03,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 20:55:03,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964402905] [2021-12-06 20:55:03,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:55:03,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 20:55:03,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:55:03,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:55:03,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:55:03,112 INFO L87 Difference]: Start difference. First operand 202 states and 246 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 20:55:03,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:03,316 INFO L93 Difference]: Finished difference Result 237 states and 285 transitions. [2021-12-06 20:55:03,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:55:03,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 69 [2021-12-06 20:55:03,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:03,319 INFO L225 Difference]: With dead ends: 237 [2021-12-06 20:55:03,319 INFO L226 Difference]: Without dead ends: 223 [2021-12-06 20:55:03,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:55:03,320 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 30 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:03,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 489 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:55:03,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-12-06 20:55:03,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 198. [2021-12-06 20:55:03,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 164 states have (on average 1.1829268292682926) internal successors, (194), 174 states have internal predecessors, (194), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (22), 17 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 20:55:03,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 240 transitions. [2021-12-06 20:55:03,345 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 240 transitions. Word has length 69 [2021-12-06 20:55:03,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:03,345 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 240 transitions. [2021-12-06 20:55:03,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 20:55:03,345 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 240 transitions. [2021-12-06 20:55:03,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 20:55:03,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:03,346 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-06 20:55:03,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-12-06 20:55:03,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:55:03,548 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:03,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:03,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1053686940, now seen corresponding path program 1 times [2021-12-06 20:55:03,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:55:03,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [386420894] [2021-12-06 20:55:03,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:03,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:55:03,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:55:03,553 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:55:03,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-12-06 20:55:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:03,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 20:55:03,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 20:55:03,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:55:03,799 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:55:03,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [386420894] [2021-12-06 20:55:03,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [386420894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:55:03,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:55:03,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 20:55:03,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465056008] [2021-12-06 20:55:03,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:55:03,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 20:55:03,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:55:03,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:55:03,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:55:03,801 INFO L87 Difference]: Start difference. First operand 198 states and 240 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 20:55:04,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:04,026 INFO L93 Difference]: Finished difference Result 227 states and 272 transitions. [2021-12-06 20:55:04,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:55:04,027 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 69 [2021-12-06 20:55:04,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:04,029 INFO L225 Difference]: With dead ends: 227 [2021-12-06 20:55:04,029 INFO L226 Difference]: Without dead ends: 213 [2021-12-06 20:55:04,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:55:04,030 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 30 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:04,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 489 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:55:04,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-12-06 20:55:04,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 168. [2021-12-06 20:55:04,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 141 states have (on average 1.198581560283688) internal successors, (169), 147 states have internal predecessors, (169), 18 states have call successors, (18), 7 states have call predecessors, (18), 8 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-06 20:55:04,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 204 transitions. [2021-12-06 20:55:04,055 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 204 transitions. Word has length 69 [2021-12-06 20:55:04,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:04,055 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 204 transitions. [2021-12-06 20:55:04,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 20:55:04,055 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 204 transitions. [2021-12-06 20:55:04,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 20:55:04,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:04,056 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:55:04,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-12-06 20:55:04,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:55:04,258 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:04,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:04,259 INFO L85 PathProgramCache]: Analyzing trace with hash -954827573, now seen corresponding path program 1 times [2021-12-06 20:55:04,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:55:04,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356038509] [2021-12-06 20:55:04,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:04,260 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:55:04,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:55:04,263 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:55:04,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-12-06 20:55:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:04,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 20:55:04,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 20:55:05,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:55:06,424 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:55:06,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356038509] [2021-12-06 20:55:06,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356038509] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:55:06,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [564597084] [2021-12-06 20:55:06,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:06,425 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 20:55:06,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 20:55:06,426 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 20:55:06,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-12-06 20:55:06,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:06,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 20:55:06,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 20:55:06,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:55:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 20:55:07,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [564597084] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:55:07,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:55:07,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 12 [2021-12-06 20:55:07,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558270670] [2021-12-06 20:55:07,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:55:07,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 20:55:07,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:55:07,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 20:55:07,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-12-06 20:55:07,142 INFO L87 Difference]: Start difference. First operand 168 states and 204 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 20:55:07,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:07,967 INFO L93 Difference]: Finished difference Result 196 states and 230 transitions. [2021-12-06 20:55:07,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 20:55:07,968 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 68 [2021-12-06 20:55:07,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:07,969 INFO L225 Difference]: With dead ends: 196 [2021-12-06 20:55:07,969 INFO L226 Difference]: Without dead ends: 143 [2021-12-06 20:55:07,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-12-06 20:55:07,970 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 52 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:07,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 833 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 59 Unchecked, 0.4s Time] [2021-12-06 20:55:07,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-06 20:55:07,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-12-06 20:55:07,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 118 states have (on average 1.194915254237288) internal successors, (141), 124 states have internal predecessors, (141), 16 states have call successors, (16), 7 states have call predecessors, (16), 8 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 20:55:07,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 172 transitions. [2021-12-06 20:55:07,987 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 172 transitions. Word has length 68 [2021-12-06 20:55:07,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:07,987 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 172 transitions. [2021-12-06 20:55:07,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 20:55:07,987 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 172 transitions. [2021-12-06 20:55:07,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 20:55:07,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:07,988 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:55:07,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-12-06 20:55:08,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-12-06 20:55:08,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 20:55:08,390 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:08,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:08,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1492423721, now seen corresponding path program 1 times [2021-12-06 20:55:08,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:55:08,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1033496378] [2021-12-06 20:55:08,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:08,392 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:55:08,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:55:08,393 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:55:08,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-12-06 20:55:08,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:08,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:55:08,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 20:55:08,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:55:08,676 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:55:08,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1033496378] [2021-12-06 20:55:08,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1033496378] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:55:08,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:55:08,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:55:08,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759697865] [2021-12-06 20:55:08,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:55:08,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:55:08,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:55:08,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:55:08,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:55:08,678 INFO L87 Difference]: Start difference. First operand 143 states and 172 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 20:55:08,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:08,763 INFO L93 Difference]: Finished difference Result 171 states and 201 transitions. [2021-12-06 20:55:08,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:55:08,764 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), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 70 [2021-12-06 20:55:08,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:08,767 INFO L225 Difference]: With dead ends: 171 [2021-12-06 20:55:08,767 INFO L226 Difference]: Without dead ends: 116 [2021-12-06 20:55:08,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:55:08,768 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 43 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:08,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 250 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:55:08,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-06 20:55:08,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2021-12-06 20:55:08,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 94 states have internal predecessors, (106), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 20:55:08,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2021-12-06 20:55:08,778 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 70 [2021-12-06 20:55:08,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:08,779 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2021-12-06 20:55:08,779 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), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 20:55:08,779 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2021-12-06 20:55:08,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 20:55:08,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:08,779 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:55:08,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-12-06 20:55:08,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:55:08,980 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:08,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:08,982 INFO L85 PathProgramCache]: Analyzing trace with hash -751559577, now seen corresponding path program 1 times [2021-12-06 20:55:08,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:55:08,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251911723] [2021-12-06 20:55:08,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:08,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:55:08,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:55:08,986 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:55:08,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-12-06 20:55:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:09,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 20:55:09,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 20:55:09,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:55:10,496 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:55:10,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251911723] [2021-12-06 20:55:10,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251911723] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:55:10,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [311038176] [2021-12-06 20:55:10,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:10,496 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 20:55:10,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 20:55:10,497 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 20:55:10,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-12-06 20:55:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:10,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 20:55:10,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 20:55:11,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:55:11,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [311038176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:55:11,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:55:11,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-12-06 20:55:11,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991769258] [2021-12-06 20:55:11,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:55:11,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:55:11,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:55:11,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:55:11,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-12-06 20:55:11,108 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 20:55:11,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:11,699 INFO L93 Difference]: Finished difference Result 176 states and 200 transitions. [2021-12-06 20:55:11,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:55:11,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 70 [2021-12-06 20:55:11,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:11,701 INFO L225 Difference]: With dead ends: 176 [2021-12-06 20:55:11,701 INFO L226 Difference]: Without dead ends: 128 [2021-12-06 20:55:11,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-12-06 20:55:11,702 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 122 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:11,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 247 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:55:11,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-06 20:55:11,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 108. [2021-12-06 20:55:11,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 92 states have (on average 1.141304347826087) internal successors, (105), 94 states have internal predecessors, (105), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 20:55:11,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 123 transitions. [2021-12-06 20:55:11,718 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 123 transitions. Word has length 70 [2021-12-06 20:55:11,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:11,718 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 123 transitions. [2021-12-06 20:55:11,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 20:55:11,718 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 123 transitions. [2021-12-06 20:55:11,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 20:55:11,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:11,719 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:55:11,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-12-06 20:55:11,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2021-12-06 20:55:12,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 20:55:12,121 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:12,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:12,122 INFO L85 PathProgramCache]: Analyzing trace with hash -49959703, now seen corresponding path program 1 times [2021-12-06 20:55:12,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:55:12,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706753767] [2021-12-06 20:55:12,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:12,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:55:12,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:55:12,126 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:55:12,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-12-06 20:55:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:12,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 20:55:12,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:12,986 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 20:55:12,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:55:13,993 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:55:13,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706753767] [2021-12-06 20:55:13,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706753767] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:55:13,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1751501097] [2021-12-06 20:55:13,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:13,994 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 20:55:13,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 20:55:13,995 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 20:55:13,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-12-06 20:55:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:14,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 20:55:14,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 20:55:14,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:55:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 20:55:14,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1751501097] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:55:14,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:55:14,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 11 [2021-12-06 20:55:14,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208710067] [2021-12-06 20:55:14,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:55:14,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 20:55:14,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:55:14,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 20:55:14,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-12-06 20:55:14,799 INFO L87 Difference]: Start difference. First operand 108 states and 123 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 20:55:15,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:15,241 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2021-12-06 20:55:15,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 20:55:15,242 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 70 [2021-12-06 20:55:15,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:15,242 INFO L225 Difference]: With dead ends: 120 [2021-12-06 20:55:15,242 INFO L226 Difference]: Without dead ends: 69 [2021-12-06 20:55:15,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 230 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-12-06 20:55:15,243 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 28 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:15,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 571 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2021-12-06 20:55:15,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-06 20:55:15,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-12-06 20:55:15,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 57 states have internal predecessors, (64), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 20:55:15,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2021-12-06 20:55:15,250 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 70 [2021-12-06 20:55:15,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:15,250 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2021-12-06 20:55:15,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 20:55:15,250 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2021-12-06 20:55:15,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 20:55:15,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:15,251 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2021-12-06 20:55:15,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-12-06 20:55:15,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2021-12-06 20:55:15,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 20:55:15,652 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:15,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:15,654 INFO L85 PathProgramCache]: Analyzing trace with hash -437028168, now seen corresponding path program 1 times [2021-12-06 20:55:15,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:55:15,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [539577515] [2021-12-06 20:55:15,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:15,655 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:55:15,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:55:15,656 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:55:15,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-12-06 20:55:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:15,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 20:55:15,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 20:55:19,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:55:19,036 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:55:19,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [539577515] [2021-12-06 20:55:19,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [539577515] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:55:19,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:55:19,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 20:55:19,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784344651] [2021-12-06 20:55:19,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:55:19,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 20:55:19,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:55:19,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 20:55:19,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-06 20:55:19,039 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 20:55:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:19,270 INFO L93 Difference]: Finished difference Result 105 states and 120 transitions. [2021-12-06 20:55:19,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 20:55:19,271 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2021-12-06 20:55:19,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:19,272 INFO L225 Difference]: With dead ends: 105 [2021-12-06 20:55:19,273 INFO L226 Difference]: Without dead ends: 97 [2021-12-06 20:55:19,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:55:19,273 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 21 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:19,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 566 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 103 Unchecked, 0.1s Time] [2021-12-06 20:55:19,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-06 20:55:19,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 84. [2021-12-06 20:55:19,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 70 states have internal predecessors, (78), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 20:55:19,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2021-12-06 20:55:19,283 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 74 [2021-12-06 20:55:19,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:19,283 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2021-12-06 20:55:19,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 20:55:19,283 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2021-12-06 20:55:19,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 20:55:19,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:19,284 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2021-12-06 20:55:19,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-12-06 20:55:19,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:55:19,485 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:19,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:19,487 INFO L85 PathProgramCache]: Analyzing trace with hash -178862730, now seen corresponding path program 1 times [2021-12-06 20:55:19,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:55:19,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710242168] [2021-12-06 20:55:19,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:19,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:55:19,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:55:19,489 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:55:19,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-12-06 20:55:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:19,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 20:55:19,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 20:55:22,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:55:22,463 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:55:22,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710242168] [2021-12-06 20:55:22,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710242168] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:55:22,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:55:22,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 20:55:22,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008063124] [2021-12-06 20:55:22,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:55:22,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 20:55:22,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:55:22,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 20:55:22,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-06 20:55:22,465 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 20:55:22,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:22,700 INFO L93 Difference]: Finished difference Result 109 states and 122 transitions. [2021-12-06 20:55:22,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 20:55:22,701 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2021-12-06 20:55:22,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:22,702 INFO L225 Difference]: With dead ends: 109 [2021-12-06 20:55:22,702 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 20:55:22,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-12-06 20:55:22,702 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 20 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:22,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 646 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 193 Unchecked, 0.1s Time] [2021-12-06 20:55:22,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 20:55:22,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 76. [2021-12-06 20:55:22,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 63 states have internal predecessors, (70), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 20:55:22,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2021-12-06 20:55:22,710 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 74 [2021-12-06 20:55:22,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:22,710 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2021-12-06 20:55:22,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 20:55:22,710 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2021-12-06 20:55:22,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 20:55:22,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:22,711 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2021-12-06 20:55:22,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2021-12-06 20:55:22,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:55:22,912 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:22,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:22,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1281033670, now seen corresponding path program 1 times [2021-12-06 20:55:22,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:55:22,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005209119] [2021-12-06 20:55:22,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:22,915 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:55:22,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:55:22,917 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:55:22,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-12-06 20:55:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:22,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 20:55:22,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 20:55:25,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:55:25,375 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:55:25,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005209119] [2021-12-06 20:55:25,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005209119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:55:25,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:55:25,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 20:55:25,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118377039] [2021-12-06 20:55:25,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:55:25,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 20:55:25,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:55:25,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 20:55:25,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-06 20:55:25,376 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 20:55:31,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:31,127 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2021-12-06 20:55:31,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 20:55:31,128 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2021-12-06 20:55:31,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:31,129 INFO L225 Difference]: With dead ends: 108 [2021-12-06 20:55:31,129 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 20:55:31,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-12-06 20:55:31,130 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 75 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:31,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 531 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 274 Invalid, 0 Unknown, 38 Unchecked, 3.0s Time] [2021-12-06 20:55:31,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 20:55:31,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 69. [2021-12-06 20:55:31,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 56 states have (on average 1.125) internal successors, (63), 57 states have internal predecessors, (63), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 20:55:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2021-12-06 20:55:31,142 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 74 [2021-12-06 20:55:31,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:31,142 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2021-12-06 20:55:31,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 20:55:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2021-12-06 20:55:31,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 20:55:31,143 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:31,143 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2021-12-06 20:55:31,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-12-06 20:55:31,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:55:31,344 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:31,345 INFO L85 PathProgramCache]: Analyzing trace with hash -301196763, now seen corresponding path program 1 times [2021-12-06 20:55:31,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:55:31,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766541726] [2021-12-06 20:55:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:31,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:55:31,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:55:31,347 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:55:31,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-12-06 20:55:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:31,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 20:55:31,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 20:55:34,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:55:34,231 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:55:34,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766541726] [2021-12-06 20:55:34,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766541726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:55:34,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:55:34,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 20:55:34,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356644493] [2021-12-06 20:55:34,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:55:34,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 20:55:34,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:55:34,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 20:55:34,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=56, Unknown=1, NotChecked=0, Total=72 [2021-12-06 20:55:34,233 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 20:55:34,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:34,700 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2021-12-06 20:55:34,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 20:55:34,701 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 75 [2021-12-06 20:55:34,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:34,702 INFO L225 Difference]: With dead ends: 97 [2021-12-06 20:55:34,702 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 20:55:34,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=29, Invalid=102, Unknown=1, NotChecked=0, Total=132 [2021-12-06 20:55:34,703 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 26 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:34,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 499 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 72 Unchecked, 0.3s Time] [2021-12-06 20:55:34,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 20:55:34,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2021-12-06 20:55:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 70 states have (on average 1.1) internal successors, (77), 71 states have internal predecessors, (77), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 20:55:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2021-12-06 20:55:34,715 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 75 [2021-12-06 20:55:34,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:34,715 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2021-12-06 20:55:34,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 20:55:34,715 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2021-12-06 20:55:34,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 20:55:34,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:34,716 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2021-12-06 20:55:34,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-12-06 20:55:34,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:55:34,917 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:34,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:34,918 INFO L85 PathProgramCache]: Analyzing trace with hash -43031325, now seen corresponding path program 1 times [2021-12-06 20:55:34,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:55:34,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897604436] [2021-12-06 20:55:34,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:34,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:55:34,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:55:34,920 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:55:34,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-12-06 20:55:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:34,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 20:55:34,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 20:55:36,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:55:36,665 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:55:36,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897604436] [2021-12-06 20:55:36,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897604436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:55:36,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:55:36,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 20:55:36,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189603742] [2021-12-06 20:55:36,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:55:36,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 20:55:36,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:55:36,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 20:55:36,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-06 20:55:36,667 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 20:55:37,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:37,961 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2021-12-06 20:55:37,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 20:55:37,962 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 75 [2021-12-06 20:55:37,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:37,963 INFO L225 Difference]: With dead ends: 97 [2021-12-06 20:55:37,963 INFO L226 Difference]: Without dead ends: 69 [2021-12-06 20:55:37,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-12-06 20:55:37,964 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 35 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:37,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 522 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 151 Invalid, 0 Unknown, 85 Unchecked, 0.7s Time] [2021-12-06 20:55:37,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-06 20:55:37,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-12-06 20:55:37,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 57 states have internal predecessors, (62), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 20:55:37,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2021-12-06 20:55:37,972 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 75 [2021-12-06 20:55:37,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:37,972 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2021-12-06 20:55:37,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 20:55:37,973 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2021-12-06 20:55:37,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 20:55:37,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:37,973 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2021-12-06 20:55:37,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2021-12-06 20:55:38,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:55:38,174 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:38,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:38,175 INFO L85 PathProgramCache]: Analyzing trace with hash -695563549, now seen corresponding path program 1 times [2021-12-06 20:55:38,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:55:38,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1798312538] [2021-12-06 20:55:38,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:38,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:55:38,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:55:38,177 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:55:38,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-12-06 20:55:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:38,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 20:55:38,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 20:55:40,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:55:40,808 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:55:40,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1798312538] [2021-12-06 20:55:40,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1798312538] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:55:40,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:55:40,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-06 20:55:40,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96092703] [2021-12-06 20:55:40,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:55:40,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 20:55:40,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:55:40,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 20:55:40,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-12-06 20:55:40,810 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 20:55:43,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:43,452 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2021-12-06 20:55:43,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 20:55:43,453 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 75 [2021-12-06 20:55:43,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:43,454 INFO L225 Difference]: With dead ends: 77 [2021-12-06 20:55:43,454 INFO L226 Difference]: Without dead ends: 69 [2021-12-06 20:55:43,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-12-06 20:55:43,455 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 13 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:43,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 556 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 126 Invalid, 0 Unknown, 70 Unchecked, 0.7s Time] [2021-12-06 20:55:43,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-06 20:55:43,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-12-06 20:55:43,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 57 states have internal predecessors, (61), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 20:55:43,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2021-12-06 20:55:43,462 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 75 [2021-12-06 20:55:43,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:43,462 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2021-12-06 20:55:43,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 20:55:43,463 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2021-12-06 20:55:43,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 20:55:43,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:43,463 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2021-12-06 20:55:43,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-12-06 20:55:43,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:55:43,664 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:43,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:43,666 INFO L85 PathProgramCache]: Analyzing trace with hash -437398111, now seen corresponding path program 1 times [2021-12-06 20:55:43,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:55:43,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680239938] [2021-12-06 20:55:43,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:43,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:55:43,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:55:43,668 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:55:43,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-12-06 20:55:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:43,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 20:55:43,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 20:55:44,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:55:44,302 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:55:44,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680239938] [2021-12-06 20:55:44,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680239938] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:55:44,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:55:44,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 20:55:44,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603060164] [2021-12-06 20:55:44,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:55:44,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 20:55:44,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:55:44,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 20:55:44,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-06 20:55:44,304 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 20:55:44,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:44,652 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-12-06 20:55:44,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 20:55:44,653 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 75 [2021-12-06 20:55:44,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:44,653 INFO L225 Difference]: With dead ends: 69 [2021-12-06 20:55:44,653 INFO L226 Difference]: Without dead ends: 0 [2021-12-06 20:55:44,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:55:44,654 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 8 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:44,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 293 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2021-12-06 20:55:44,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-06 20:55:44,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-06 20:55:44,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:44,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-06 20:55:44,655 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2021-12-06 20:55:44,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:44,655 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 20:55:44,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 20:55:44,656 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-06 20:55:44,656 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-06 20:55:44,658 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-06 20:55:44,659 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-06 20:55:44,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2021-12-06 20:55:44,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6833f-b5a9-408f-b082-c17bb79afb81/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:55:44,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.