./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:03:08,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:03:08,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:03:08,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:03:08,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:03:08,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:03:08,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:03:08,338 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:03:08,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:03:08,349 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:03:08,351 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:03:08,352 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:03:08,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:03:08,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:03:08,357 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:03:08,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:03:08,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:03:08,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:03:08,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:03:08,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:03:08,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:03:08,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:03:08,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:03:08,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:03:08,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:03:08,388 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:03:08,388 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:03:08,390 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:03:08,391 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:03:08,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:03:08,392 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:03:08,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:03:08,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:03:08,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:03:08,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:03:08,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:03:08,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:03:08,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:03:08,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:03:08,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:03:08,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:03:08,401 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:03:08,440 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:03:08,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:03:08,441 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:03:08,442 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:03:08,443 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:03:08,443 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:03:08,443 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:03:08,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:03:08,444 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:03:08,444 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:03:08,445 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:03:08,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:03:08,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:03:08,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:03:08,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:03:08,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:03:08,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:03:08,447 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:03:08,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:03:08,447 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:03:08,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:03:08,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:03:08,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:03:08,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:03:08,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:03:08,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:03:08,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:03:08,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:03:08,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:03:08,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:03:08,452 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:03:08,452 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:03:08,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:03:08,452 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:03:08,453 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_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 [2021-11-20 06:03:08,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:03:08,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:03:08,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:03:08,761 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:03:08,762 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:03:08,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2021-11-20 06:03:08,839 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/data/57fa2a38e/513dc60a711b4a98b306fdbb9d8145b8/FLAG5dd338488 [2021-11-20 06:03:09,312 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:03:09,313 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2021-11-20 06:03:09,319 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/data/57fa2a38e/513dc60a711b4a98b306fdbb9d8145b8/FLAG5dd338488 [2021-11-20 06:03:09,693 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/data/57fa2a38e/513dc60a711b4a98b306fdbb9d8145b8 [2021-11-20 06:03:09,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:03:09,697 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:03:09,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:03:09,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:03:09,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:03:09,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:03:09" (1/1) ... [2021-11-20 06:03:09,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52b5cf3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:09, skipping insertion in model container [2021-11-20 06:03:09,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:03:09" (1/1) ... [2021-11-20 06:03:09,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:03:09,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:03:09,904 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_86070799-181c-4acf-81d0-0fef7dd1bdf0/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2021-11-20 06:03:09,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:03:09,929 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:03:09,939 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_86070799-181c-4acf-81d0-0fef7dd1bdf0/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2021-11-20 06:03:09,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:03:09,962 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:03:09,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:09 WrapperNode [2021-11-20 06:03:09,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:03:09,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:03:09,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:03:09,964 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:03:09,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:09" (1/1) ... [2021-11-20 06:03:09,976 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:09" (1/1) ... [2021-11-20 06:03:09,995 INFO L137 Inliner]: procedures = 15, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2021-11-20 06:03:09,996 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:03:09,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:03:09,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:03:09,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:03:10,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:09" (1/1) ... [2021-11-20 06:03:10,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:09" (1/1) ... [2021-11-20 06:03:10,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:09" (1/1) ... [2021-11-20 06:03:10,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:09" (1/1) ... [2021-11-20 06:03:10,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:09" (1/1) ... [2021-11-20 06:03:10,017 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:09" (1/1) ... [2021-11-20 06:03:10,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:09" (1/1) ... [2021-11-20 06:03:10,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:03:10,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:03:10,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:03:10,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:03:10,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:09" (1/1) ... [2021-11-20 06:03:10,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:03:10,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:03:10,067 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:03:10,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:03:10,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:03:10,112 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 06:03:10,112 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 06:03:10,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:03:10,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:03:10,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:03:10,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:03:10,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:03:10,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:03:10,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:03:10,189 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:03:10,190 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:03:10,420 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:03:10,426 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:03:10,427 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 06:03:10,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:03:10 BoogieIcfgContainer [2021-11-20 06:03:10,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:03:10,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:03:10,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:03:10,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:03:10,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:03:09" (1/3) ... [2021-11-20 06:03:10,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c4a45ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:03:10, skipping insertion in model container [2021-11-20 06:03:10,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:09" (2/3) ... [2021-11-20 06:03:10,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c4a45ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:03:10, skipping insertion in model container [2021-11-20 06:03:10,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:03:10" (3/3) ... [2021-11-20 06:03:10,438 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr2.c [2021-11-20 06:03:10,443 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:03:10,443 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:03:10,486 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:03:10,493 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:03:10,493 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:03:10,510 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:03:10,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 06:03:10,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:10,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:10,517 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:10,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:10,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1607472667, now seen corresponding path program 1 times [2021-11-20 06:03:10,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:10,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317120021] [2021-11-20 06:03:10,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:10,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:03:10,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:10,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317120021] [2021-11-20 06:03:10,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317120021] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:10,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:10,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:03:10,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453292606] [2021-11-20 06:03:10,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:10,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:03:10,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:10,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:03:10,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:03:10,717 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-11-20 06:03:10,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:10,735 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2021-11-20 06:03:10,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:03:10,737 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2021-11-20 06:03:10,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:10,743 INFO L225 Difference]: With dead ends: 50 [2021-11-20 06:03:10,743 INFO L226 Difference]: Without dead ends: 22 [2021-11-20 06:03:10,746 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 [2021-11-20 06:03:10,750 INFO L933 BasicCegarLoop]: 30 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, 30 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:10,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:03:10,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-20 06:03:10,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-20 06:03:10,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:03:10,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-20 06:03:10,788 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 9 [2021-11-20 06:03:10,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:10,788 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-20 06:03:10,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-11-20 06:03:10,789 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-20 06:03:10,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 06:03:10,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:10,790 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:10,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:03:10,791 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:10,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:10,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1898116011, now seen corresponding path program 1 times [2021-11-20 06:03:10,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:10,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490428060] [2021-11-20 06:03:10,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:10,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:03:10,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:10,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490428060] [2021-11-20 06:03:10,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490428060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:10,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:10,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:03:10,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603654761] [2021-11-20 06:03:10,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:10,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:03:10,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:10,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:03:10,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:03:10,941 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-20 06:03:11,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:11,044 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-11-20 06:03:11,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:03:11,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-11-20 06:03:11,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:11,045 INFO L225 Difference]: With dead ends: 40 [2021-11-20 06:03:11,046 INFO L226 Difference]: Without dead ends: 30 [2021-11-20 06:03:11,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:03:11,048 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:11,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 24 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:03:11,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-20 06:03:11,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2021-11-20 06:03:11,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:03:11,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-20 06:03:11,060 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2021-11-20 06:03:11,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:11,060 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-20 06:03:11,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-20 06:03:11,061 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-20 06:03:11,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 06:03:11,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:11,062 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:11,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:03:11,063 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:11,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:11,064 INFO L85 PathProgramCache]: Analyzing trace with hash 544146986, now seen corresponding path program 1 times [2021-11-20 06:03:11,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:11,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368899799] [2021-11-20 06:03:11,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:11,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:11,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:03:11,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:11,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:03:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:11,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:03:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:11,274 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:03:11,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:11,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368899799] [2021-11-20 06:03:11,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368899799] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:03:11,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650845336] [2021-11-20 06:03:11,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:11,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:03:11,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:03:11,302 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:03:11,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:03:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:11,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:03:11,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:03:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:03:11,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:03:11,826 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:03:11,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650845336] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:03:11,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:03:11,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 10 [2021-11-20 06:03:11,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053078446] [2021-11-20 06:03:11,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:03:11,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:03:11,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:11,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:03:11,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:03:11,831 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 06:03:12,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:12,076 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2021-11-20 06:03:12,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:03:12,076 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 29 [2021-11-20 06:03:12,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:12,081 INFO L225 Difference]: With dead ends: 72 [2021-11-20 06:03:12,081 INFO L226 Difference]: Without dead ends: 61 [2021-11-20 06:03:12,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:03:12,086 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 136 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:12,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 38 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:03:12,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-20 06:03:12,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 48. [2021-11-20 06:03:12,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-20 06:03:12,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2021-11-20 06:03:12,122 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 29 [2021-11-20 06:03:12,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:12,123 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2021-11-20 06:03:12,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 06:03:12,123 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2021-11-20 06:03:12,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 06:03:12,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:12,133 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:12,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:03:12,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:03:12,338 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:12,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:12,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1645511465, now seen corresponding path program 2 times [2021-11-20 06:03:12,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:12,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553453823] [2021-11-20 06:03:12,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:12,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:12,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:03:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:12,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:03:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:12,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:03:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:12,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-20 06:03:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:12,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 06:03:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:12,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:03:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:12,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:03:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:12,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:03:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:12,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 06:03:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:12,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 06:03:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:12,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:03:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:12,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-20 06:03:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-11-20 06:03:12,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:12,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553453823] [2021-11-20 06:03:12,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553453823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:03:12,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273332635] [2021-11-20 06:03:12,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:03:12,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:03:12,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:03:12,629 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:03:12,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:03:12,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:03:12,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:03:12,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:03:12,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:03:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-11-20 06:03:13,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:03:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-11-20 06:03:13,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273332635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:03:13,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:03:13,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 19 [2021-11-20 06:03:13,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942770863] [2021-11-20 06:03:13,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:03:13,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:03:13,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:13,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:03:13,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:03:13,456 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 12 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2021-11-20 06:03:13,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:13,878 INFO L93 Difference]: Finished difference Result 162 states and 206 transitions. [2021-11-20 06:03:13,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:03:13,879 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 12 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) Word has length 89 [2021-11-20 06:03:13,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:13,884 INFO L225 Difference]: With dead ends: 162 [2021-11-20 06:03:13,885 INFO L226 Difference]: Without dead ends: 145 [2021-11-20 06:03:13,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:03:13,894 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 315 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:13,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 63 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:03:13,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-20 06:03:13,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 96. [2021-11-20 06:03:13,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-20 06:03:13,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 127 transitions. [2021-11-20 06:03:13,924 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 127 transitions. Word has length 89 [2021-11-20 06:03:13,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:13,925 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 127 transitions. [2021-11-20 06:03:13,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 12 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2021-11-20 06:03:13,925 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 127 transitions. [2021-11-20 06:03:13,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-20 06:03:13,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:13,938 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:13,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:03:14,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:03:14,154 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:14,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:14,155 INFO L85 PathProgramCache]: Analyzing trace with hash 548463335, now seen corresponding path program 3 times [2021-11-20 06:03:14,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:14,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768390710] [2021-11-20 06:03:14,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:14,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:14,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:03:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:03:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:03:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-20 06:03:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 06:03:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:03:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:03:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:03:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 06:03:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 06:03:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:03:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-20 06:03:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-20 06:03:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-20 06:03:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-20 06:03:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-20 06:03:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-20 06:03:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-20 06:03:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-20 06:03:14,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-20 06:03:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-20 06:03:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-11-20 06:03:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-20 06:03:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-20 06:03:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-20 06:03:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-20 06:03:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-20 06:03:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-11-20 06:03:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-11-20 06:03:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-11-20 06:03:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2120 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 1840 trivial. 0 not checked. [2021-11-20 06:03:14,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:14,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768390710] [2021-11-20 06:03:14,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768390710] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:03:14,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592990529] [2021-11-20 06:03:14,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:03:14,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:03:14,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:03:14,638 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:03:14,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:03:15,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-20 06:03:15,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:03:15,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:03:15,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:03:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2120 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2020 trivial. 0 not checked. [2021-11-20 06:03:15,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:03:16,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2120 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2020 trivial. 0 not checked. [2021-11-20 06:03:16,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592990529] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:03:16,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:03:16,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 37 [2021-11-20 06:03:16,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458518671] [2021-11-20 06:03:16,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:03:16,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 06:03:16,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:16,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 06:03:16,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=753, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 06:03:16,577 INFO L87 Difference]: Start difference. First operand 96 states and 127 transitions. Second operand has 37 states, 37 states have (on average 2.7567567567567566) internal successors, (102), 37 states have internal predecessors, (102), 12 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2021-11-20 06:03:17,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:17,595 INFO L93 Difference]: Finished difference Result 342 states and 434 transitions. [2021-11-20 06:03:17,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 06:03:17,596 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.7567567567567566) internal successors, (102), 37 states have internal predecessors, (102), 12 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) Word has length 209 [2021-11-20 06:03:17,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:17,603 INFO L225 Difference]: With dead ends: 342 [2021-11-20 06:03:17,603 INFO L226 Difference]: Without dead ends: 313 [2021-11-20 06:03:17,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=876, Invalid=1380, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 06:03:17,607 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 677 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:17,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [707 Valid, 131 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:03:17,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-20 06:03:17,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 192. [2021-11-20 06:03:17,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-11-20 06:03:17,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 259 transitions. [2021-11-20 06:03:17,668 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 259 transitions. Word has length 209 [2021-11-20 06:03:17,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:17,673 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 259 transitions. [2021-11-20 06:03:17,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.7567567567567566) internal successors, (102), 37 states have internal predecessors, (102), 12 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2021-11-20 06:03:17,674 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 259 transitions. [2021-11-20 06:03:17,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2021-11-20 06:03:17,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:17,688 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:17,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:03:17,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:03:17,912 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:17,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:17,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1915094685, now seen corresponding path program 4 times [2021-11-20 06:03:17,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:17,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145541165] [2021-11-20 06:03:17,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:17,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:03:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:03:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:03:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-20 06:03:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 06:03:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:03:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:03:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:03:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 06:03:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 06:03:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:03:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-20 06:03:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-20 06:03:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-20 06:03:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-20 06:03:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-20 06:03:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-20 06:03:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-20 06:03:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-20 06:03:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-20 06:03:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-20 06:03:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-11-20 06:03:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-20 06:03:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-20 06:03:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-20 06:03:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-20 06:03:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-20 06:03:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-11-20 06:03:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-11-20 06:03:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-11-20 06:03:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-11-20 06:03:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-11-20 06:03:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2021-11-20 06:03:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-11-20 06:03:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2021-11-20 06:03:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2021-11-20 06:03:18,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2021-11-20 06:03:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2021-11-20 06:03:18,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2021-11-20 06:03:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2021-11-20 06:03:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2021-11-20 06:03:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2021-11-20 06:03:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2021-11-20 06:03:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2021-11-20 06:03:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2021-11-20 06:03:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 273 [2021-11-20 06:03:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2021-11-20 06:03:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 283 [2021-11-20 06:03:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 291 [2021-11-20 06:03:18,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 296 [2021-11-20 06:03:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 301 [2021-11-20 06:03:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 309 [2021-11-20 06:03:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2021-11-20 06:03:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 319 [2021-11-20 06:03:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 327 [2021-11-20 06:03:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 332 [2021-11-20 06:03:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2021-11-20 06:03:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 345 [2021-11-20 06:03:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2021-11-20 06:03:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 355 [2021-11-20 06:03:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 363 [2021-11-20 06:03:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2021-11-20 06:03:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 373 [2021-11-20 06:03:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 381 [2021-11-20 06:03:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 386 [2021-11-20 06:03:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 391 [2021-11-20 06:03:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10472 backedges. 0 proven. 1408 refuted. 0 times theorem prover too weak. 9064 trivial. 0 not checked. [2021-11-20 06:03:18,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:18,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145541165] [2021-11-20 06:03:18,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145541165] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:03:18,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455054027] [2021-11-20 06:03:18,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:03:18,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:03:18,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:03:18,792 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:03:18,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:03:19,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:03:19,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:03:19,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 105 conjunts are in the unsatisfiable core [2021-11-20 06:03:19,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:03:19,519 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:03:19,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 06:03:19,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 26 [2021-11-20 06:03:20,448 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 06:03:20,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-20 06:03:21,048 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 06:03:21,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-20 06:03:21,618 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 06:03:21,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-20 06:03:22,182 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 06:03:22,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-20 06:03:22,775 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 06:03:22,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-20 06:03:23,363 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 06:03:23,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-20 06:03:23,940 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 06:03:23,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-20 06:03:24,538 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 06:03:24,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-20 06:03:25,139 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 06:03:25,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-20 06:03:25,686 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 06:03:25,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-20 06:03:26,253 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 06:03:26,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-20 06:03:26,781 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 06:03:26,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-20 06:03:27,334 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 06:03:27,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-20 06:03:27,906 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 06:03:27,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-20 06:03:28,434 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 06:03:28,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-20 06:03:28,980 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 06:03:28,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-20 06:03:29,606 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 06:03:29,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-20 06:03:30,169 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 06:03:30,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-20 06:03:30,801 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 06:03:30,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-20 06:03:31,402 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 06:03:31,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 47 [2021-11-20 06:03:31,544 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-20 06:03:31,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 59 [2021-11-20 06:03:31,734 INFO L354 Elim1Store]: treesize reduction 101, result has 6.5 percent of original size [2021-11-20 06:03:31,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 68 treesize of output 85 [2021-11-20 06:03:31,959 INFO L354 Elim1Store]: treesize reduction 144, result has 10.6 percent of original size [2021-11-20 06:03:31,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 91 treesize of output 99 [2021-11-20 06:03:32,282 INFO L354 Elim1Store]: treesize reduction 294, result has 8.7 percent of original size [2021-11-20 06:03:32,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 3 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 18 case distinctions, treesize of input 122 treesize of output 145 [2021-11-20 06:03:32,745 INFO L354 Elim1Store]: treesize reduction 492, result has 7.3 percent of original size [2021-11-20 06:03:32,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 3 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 30 case distinctions, treesize of input 156 treesize of output 188 [2021-11-20 06:03:33,431 INFO L354 Elim1Store]: treesize reduction 738, result has 6.3 percent of original size [2021-11-20 06:03:33,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 17 select indices, 17 select index equivalence classes, 3 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 45 case distinctions, treesize of input 190 treesize of output 231 [2021-11-20 06:03:34,263 INFO L354 Elim1Store]: treesize reduction 1032, result has 5.6 percent of original size [2021-11-20 06:03:34,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 20 select indices, 20 select index equivalence classes, 3 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 63 case distinctions, treesize of input 224 treesize of output 274 [2021-11-20 06:03:35,561 INFO L354 Elim1Store]: treesize reduction 1374, result has 5.0 percent of original size [2021-11-20 06:03:35,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 23 select indices, 23 select index equivalence classes, 3 disjoint index pairs (out of 253 index pairs), introduced 23 new quantified variables, introduced 84 case distinctions, treesize of input 258 treesize of output 317 [2021-11-20 06:03:38,208 INFO L354 Elim1Store]: treesize reduction 1764, result has 4.5 percent of original size [2021-11-20 06:03:38,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 26 select indices, 26 select index equivalence classes, 3 disjoint index pairs (out of 325 index pairs), introduced 26 new quantified variables, introduced 108 case distinctions, treesize of input 292 treesize of output 360 [2021-11-20 06:03:42,154 INFO L354 Elim1Store]: treesize reduction 2202, result has 4.1 percent of original size [2021-11-20 06:03:42,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 29 select indices, 29 select index equivalence classes, 3 disjoint index pairs (out of 406 index pairs), introduced 29 new quantified variables, introduced 135 case distinctions, treesize of input 326 treesize of output 403 [2021-11-20 06:06:14,285 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-20 06:06:14,286 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-20 06:06:14,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:06:14,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-20 06:06:14,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832794581] [2021-11-20 06:06:14,287 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:06:14,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 06:06:14,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:14,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 06:06:14,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=846, Invalid=4556, Unknown=0, NotChecked=0, Total=5402 [2021-11-20 06:06:14,290 INFO L87 Difference]: Start difference. First operand 192 states and 259 transitions. Second operand has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 22 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 22 states have call predecessors, (66), 22 states have call successors, (66) [2021-11-20 06:06:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:06:14,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 385 SyntacticMatches, 119 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6040 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=846, Invalid=4556, Unknown=0, NotChecked=0, Total=5402 [2021-11-20 06:06:14,293 INFO L933 BasicCegarLoop]: 1 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, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:14,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:06:14,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-20 06:06:14,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:06:14,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:06:14,494 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@5654754b at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-20 06:06:14,497 INFO L158 Benchmark]: Toolchain (without parser) took 184800.14ms. Allocated memory was 113.2MB in the beginning and 255.9MB in the end (delta: 142.6MB). Free memory was 70.8MB in the beginning and 175.3MB in the end (delta: -104.4MB). Peak memory consumption was 37.9MB. Max. memory is 16.1GB. [2021-11-20 06:06:14,497 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 113.2MB. Free memory is still 87.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:06:14,497 INFO L158 Benchmark]: CACSL2BoogieTranslator took 265.05ms. Allocated memory is still 113.2MB. Free memory was 70.6MB in the beginning and 86.4MB in the end (delta: -15.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 06:06:14,497 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.64ms. Allocated memory is still 113.2MB. Free memory was 86.4MB in the beginning and 84.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:06:14,498 INFO L158 Benchmark]: Boogie Preprocessor took 24.72ms. Allocated memory is still 113.2MB. Free memory was 84.6MB in the beginning and 83.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:06:14,499 INFO L158 Benchmark]: RCFGBuilder took 407.12ms. Allocated memory is still 113.2MB. Free memory was 83.5MB in the beginning and 72.8MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 06:06:14,499 INFO L158 Benchmark]: TraceAbstraction took 184065.83ms. Allocated memory was 113.2MB in the beginning and 255.9MB in the end (delta: 142.6MB). Free memory was 72.3MB in the beginning and 175.3MB in the end (delta: -103.0MB). Peak memory consumption was 40.4MB. Max. memory is 16.1GB. [2021-11-20 06:06:14,501 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 113.2MB. Free memory is still 87.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 265.05ms. Allocated memory is still 113.2MB. Free memory was 70.6MB in the beginning and 86.4MB in the end (delta: -15.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.64ms. Allocated memory is still 113.2MB. Free memory was 86.4MB in the beginning and 84.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.72ms. Allocated memory is still 113.2MB. Free memory was 84.6MB in the beginning and 83.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 407.12ms. Allocated memory is still 113.2MB. Free memory was 83.5MB in the beginning and 72.8MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 184065.83ms. Allocated memory was 113.2MB in the beginning and 255.9MB in the end (delta: 142.6MB). Free memory was 72.3MB in the beginning and 175.3MB in the end (delta: -103.0MB). Peak memory consumption was 40.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@5654754b de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@5654754b: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:06:16,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:06:16,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:06:16,673 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:06:16,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:06:16,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:06:16,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:06:16,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:06:16,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:06:16,697 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:06:16,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:06:16,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:06:16,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:06:16,707 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:06:16,709 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:06:16,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:06:16,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:06:16,718 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:06:16,720 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:06:16,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:06:16,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:06:16,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:06:16,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:06:16,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:06:16,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:06:16,750 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:06:16,751 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:06:16,753 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:06:16,753 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:06:16,755 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:06:16,755 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:06:16,756 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:06:16,759 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:06:16,760 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:06:16,761 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:06:16,762 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:06:16,763 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:06:16,763 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:06:16,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:06:16,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:06:16,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:06:16,767 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-20 06:06:16,822 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:06:16,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:06:16,824 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:06:16,824 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:06:16,825 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:06:16,825 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:06:16,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:06:16,827 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:06:16,827 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:06:16,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:06:16,828 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:06:16,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:06:16,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:06:16,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:06:16,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:06:16,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:06:16,830 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 06:06:16,830 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 06:06:16,831 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 06:06:16,831 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:06:16,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:06:16,831 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:06:16,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:06:16,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:06:16,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:06:16,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:06:16,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:06:16,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:06:16,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:06:16,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:06:16,834 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 06:06:16,834 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 06:06:16,834 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:06:16,835 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:06:16,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:06:16,835 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:06:16,835 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 06:06:16,836 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_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 [2021-11-20 06:06:17,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:06:17,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:06:17,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:06:17,261 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:06:17,264 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:06:17,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2021-11-20 06:06:17,351 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/data/8e87ea66c/33a21aecc2504064904cbb77a88d7067/FLAG8db2ee8e2 [2021-11-20 06:06:17,876 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:06:17,877 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2021-11-20 06:06:17,884 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/data/8e87ea66c/33a21aecc2504064904cbb77a88d7067/FLAG8db2ee8e2 [2021-11-20 06:06:18,247 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/data/8e87ea66c/33a21aecc2504064904cbb77a88d7067 [2021-11-20 06:06:18,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:06:18,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:06:18,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:06:18,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:06:18,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:06:18,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:06:18" (1/1) ... [2021-11-20 06:06:18,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bae475c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:18, skipping insertion in model container [2021-11-20 06:06:18,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:06:18" (1/1) ... [2021-11-20 06:06:18,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:06:18,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:06:18,436 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_86070799-181c-4acf-81d0-0fef7dd1bdf0/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2021-11-20 06:06:18,454 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:06:18,464 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:06:18,477 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_86070799-181c-4acf-81d0-0fef7dd1bdf0/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2021-11-20 06:06:18,487 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:06:18,501 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:06:18,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:18 WrapperNode [2021-11-20 06:06:18,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:06:18,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:06:18,504 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:06:18,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:06:18,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:18" (1/1) ... [2021-11-20 06:06:18,520 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:18" (1/1) ... [2021-11-20 06:06:18,541 INFO L137 Inliner]: procedures = 17, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2021-11-20 06:06:18,542 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:06:18,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:06:18,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:06:18,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:06:18,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:18" (1/1) ... [2021-11-20 06:06:18,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:18" (1/1) ... [2021-11-20 06:06:18,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:18" (1/1) ... [2021-11-20 06:06:18,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:18" (1/1) ... [2021-11-20 06:06:18,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:18" (1/1) ... [2021-11-20 06:06:18,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:18" (1/1) ... [2021-11-20 06:06:18,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:18" (1/1) ... [2021-11-20 06:06:18,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:06:18,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:06:18,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:06:18,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:06:18,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:18" (1/1) ... [2021-11-20 06:06:18,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:06:18,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:06:18,614 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:06:18,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:06:18,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:06:18,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 06:06:18,659 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 06:06:18,659 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 06:06:18,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:06:18,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 06:06:18,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:06:18,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:06:18,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:06:18,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 06:06:18,732 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:06:18,734 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:06:18,969 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:06:18,975 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:06:18,975 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 06:06:18,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:06:18 BoogieIcfgContainer [2021-11-20 06:06:18,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:06:18,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:06:18,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:06:18,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:06:18,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:06:18" (1/3) ... [2021-11-20 06:06:18,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7ffd93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:06:18, skipping insertion in model container [2021-11-20 06:06:18,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:18" (2/3) ... [2021-11-20 06:06:19,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7ffd93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:06:19, skipping insertion in model container [2021-11-20 06:06:19,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:06:18" (3/3) ... [2021-11-20 06:06:19,005 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr2.c [2021-11-20 06:06:19,010 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:06:19,010 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:06:19,074 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:06:19,084 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:06:19,084 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:06:19,116 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:06:19,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 06:06:19,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:19,122 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:19,122 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:19,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:19,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1607472667, now seen corresponding path program 1 times [2021-11-20 06:06:19,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:06:19,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413247673] [2021-11-20 06:06:19,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:19,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:06:19,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:06:19,145 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:06:19,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 06:06:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:19,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 06:06:19,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:06:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:19,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:06:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:19,378 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:06:19,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413247673] [2021-11-20 06:06:19,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413247673] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:19,381 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:19,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 06:06:19,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398492886] [2021-11-20 06:06:19,383 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:19,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:06:19,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:06:19,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:06:19,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:06:19,425 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-11-20 06:06:19,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:19,446 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2021-11-20 06:06:19,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:06:19,448 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2021-11-20 06:06:19,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:19,455 INFO L225 Difference]: With dead ends: 50 [2021-11-20 06:06:19,455 INFO L226 Difference]: Without dead ends: 22 [2021-11-20 06:06:19,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:06:19,466 INFO L933 BasicCegarLoop]: 30 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, 30 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:19,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:06:19,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-20 06:06:19,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-20 06:06:19,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:06:19,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-20 06:06:19,506 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 9 [2021-11-20 06:06:19,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:19,507 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-20 06:06:19,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-11-20 06:06:19,507 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-20 06:06:19,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 06:06:19,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:19,509 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:19,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:06:19,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:06:19,720 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:19,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:19,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1898116011, now seen corresponding path program 1 times [2021-11-20 06:06:19,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:06:19,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74387664] [2021-11-20 06:06:19,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:19,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:06:19,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:06:19,738 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:06:19,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 06:06:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:19,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:06:19,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:06:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:19,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:06:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:19,959 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:06:19,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74387664] [2021-11-20 06:06:19,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74387664] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:19,959 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:19,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-20 06:06:19,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449553572] [2021-11-20 06:06:19,960 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:19,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:06:19,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:06:19,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:06:19,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:06:19,962 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-11-20 06:06:20,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:20,142 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2021-11-20 06:06:20,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:06:20,143 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 9 [2021-11-20 06:06:20,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:20,144 INFO L225 Difference]: With dead ends: 43 [2021-11-20 06:06:20,144 INFO L226 Difference]: Without dead ends: 33 [2021-11-20 06:06:20,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:06:20,154 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 50 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:20,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 23 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:06:20,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-20 06:06:20,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-11-20 06:06:20,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:06:20,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-11-20 06:06:20,177 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 9 [2021-11-20 06:06:20,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:20,178 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-11-20 06:06:20,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-11-20 06:06:20,178 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-11-20 06:06:20,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 06:06:20,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:20,181 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:20,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:06:20,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:06:20,382 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:20,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:20,383 INFO L85 PathProgramCache]: Analyzing trace with hash 890719551, now seen corresponding path program 1 times [2021-11-20 06:06:20,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:06:20,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035010201] [2021-11-20 06:06:20,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:20,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:06:20,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:06:20,385 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:06:20,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 06:06:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:20,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:06:20,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:06:20,861 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 06:06:20,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:06:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 06:06:21,153 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:06:21,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035010201] [2021-11-20 06:06:21,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035010201] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:06:21,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:06:21,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-11-20 06:06:21,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239036560] [2021-11-20 06:06:21,154 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:06:21,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:06:21,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:06:21,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:06:21,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:06:21,156 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-20 06:06:21,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:21,753 INFO L93 Difference]: Finished difference Result 102 states and 130 transitions. [2021-11-20 06:06:21,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:06:21,754 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 49 [2021-11-20 06:06:21,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:21,756 INFO L225 Difference]: With dead ends: 102 [2021-11-20 06:06:21,756 INFO L226 Difference]: Without dead ends: 89 [2021-11-20 06:06:21,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:06:21,758 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 157 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:21,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 59 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:06:21,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-20 06:06:21,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2021-11-20 06:06:21,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 18 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-20 06:06:21,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2021-11-20 06:06:21,777 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 49 [2021-11-20 06:06:21,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:21,779 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2021-11-20 06:06:21,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-20 06:06:21,779 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2021-11-20 06:06:21,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-20 06:06:21,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:21,784 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:21,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:06:21,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:06:21,999 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:21,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:22,000 INFO L85 PathProgramCache]: Analyzing trace with hash -523227629, now seen corresponding path program 2 times [2021-11-20 06:06:22,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:06:22,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011754635] [2021-11-20 06:06:22,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:06:22,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:06:22,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:06:22,002 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:06:22,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 06:06:22,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:06:22,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:06:22,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:06:22,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:06:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2021-11-20 06:06:22,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:06:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2021-11-20 06:06:23,518 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:06:23,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011754635] [2021-11-20 06:06:23,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011754635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:06:23,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:06:23,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-11-20 06:06:23,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087131600] [2021-11-20 06:06:23,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:06:23,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:06:23,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:06:23,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:06:23,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:06:23,522 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2021-11-20 06:06:25,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:25,445 INFO L93 Difference]: Finished difference Result 222 states and 282 transitions. [2021-11-20 06:06:25,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:06:25,446 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) Word has length 129 [2021-11-20 06:06:25,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:25,449 INFO L225 Difference]: With dead ends: 222 [2021-11-20 06:06:25,450 INFO L226 Difference]: Without dead ends: 201 [2021-11-20 06:06:25,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:06:25,452 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 486 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:25,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 240 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 06:06:25,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-20 06:06:25,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 128. [2021-11-20 06:06:25,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-20 06:06:25,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 171 transitions. [2021-11-20 06:06:25,502 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 171 transitions. Word has length 129 [2021-11-20 06:06:25,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:25,506 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 171 transitions. [2021-11-20 06:06:25,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2021-11-20 06:06:25,506 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 171 transitions. [2021-11-20 06:06:25,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-20 06:06:25,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:25,526 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:25,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-20 06:06:25,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:06:25,739 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:25,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:25,740 INFO L85 PathProgramCache]: Analyzing trace with hash 295005115, now seen corresponding path program 3 times [2021-11-20 06:06:25,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:06:25,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858390095] [2021-11-20 06:06:25,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:06:25,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:06:25,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:06:25,743 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:06:25,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 06:06:26,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-20 06:06:26,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:06:26,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 06:06:26,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:06:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4004 trivial. 0 not checked. [2021-11-20 06:06:27,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:06:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4004 trivial. 0 not checked. [2021-11-20 06:06:29,335 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:06:29,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858390095] [2021-11-20 06:06:29,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858390095] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:06:29,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:06:29,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-11-20 06:06:29,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145269062] [2021-11-20 06:06:29,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:06:29,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 06:06:29,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:06:29,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 06:06:29,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 06:06:29,339 INFO L87 Difference]: Start difference. First operand 128 states and 171 transitions. Second operand has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 06:06:36,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:36,330 INFO L93 Difference]: Finished difference Result 462 states and 586 transitions. [2021-11-20 06:06:36,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 06:06:36,333 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 289 [2021-11-20 06:06:36,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:36,338 INFO L225 Difference]: With dead ends: 462 [2021-11-20 06:06:36,339 INFO L226 Difference]: Without dead ends: 425 [2021-11-20 06:06:36,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=831, Invalid=1521, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 06:06:36,349 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 2135 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 3605 mSolverCounterSat, 1512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2180 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 5117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1512 IncrementalHoareTripleChecker+Valid, 3605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:36,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2180 Valid, 992 Invalid, 5117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1512 Valid, 3605 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-20 06:06:36,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-11-20 06:06:36,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 256. [2021-11-20 06:06:36,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 164 states have (on average 1.0182926829268293) internal successors, (167), 164 states have internal predecessors, (167), 90 states have call successors, (90), 1 states have call predecessors, (90), 1 states have return successors, (90), 90 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-20 06:06:36,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 347 transitions. [2021-11-20 06:06:36,420 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 347 transitions. Word has length 289 [2021-11-20 06:06:36,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:36,423 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 347 transitions. [2021-11-20 06:06:36,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 06:06:36,424 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 347 transitions. [2021-11-20 06:06:36,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2021-11-20 06:06:36,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:36,443 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:36,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:06:36,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:06:36,663 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:36,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:36,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1937910005, now seen corresponding path program 4 times [2021-11-20 06:06:36,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:06:36,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [607847120] [2021-11-20 06:06:36,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:06:36,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:06:36,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:06:36,667 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:06:36,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 06:06:37,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:06:37,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:06:37,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 06:06:37,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:06:40,000 INFO L134 CoverageAnalysis]: Checked inductivity of 19560 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 16920 trivial. 0 not checked. [2021-11-20 06:06:40,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:06:44,522 INFO L134 CoverageAnalysis]: Checked inductivity of 19560 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 16920 trivial. 0 not checked. [2021-11-20 06:06:44,523 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:06:44,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [607847120] [2021-11-20 06:06:44,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [607847120] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:06:44,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:06:44,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 66 [2021-11-20 06:06:44,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092706897] [2021-11-20 06:06:44,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:06:44,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-20 06:06:44,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:06:44,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-20 06:06:44,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1153, Invalid=3137, Unknown=0, NotChecked=0, Total=4290 [2021-11-20 06:06:44,531 INFO L87 Difference]: Start difference. First operand 256 states and 347 transitions. Second operand has 66 states, 66 states have (on average 3.0303030303030303) internal successors, (200), 66 states have internal predecessors, (200), 60 states have call successors, (180), 2 states have call predecessors, (180), 2 states have return successors, (180), 60 states have call predecessors, (180), 60 states have call successors, (180) [2021-11-20 06:07:15,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:15,034 INFO L93 Difference]: Finished difference Result 942 states and 1194 transitions. [2021-11-20 06:07:15,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-20 06:07:15,035 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.0303030303030303) internal successors, (200), 66 states have internal predecessors, (200), 60 states have call successors, (180), 2 states have call predecessors, (180), 2 states have return successors, (180), 60 states have call predecessors, (180), 60 states have call successors, (180) Word has length 609 [2021-11-20 06:07:15,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:15,045 INFO L225 Difference]: With dead ends: 942 [2021-11-20 06:07:15,045 INFO L226 Difference]: Without dead ends: 873 [2021-11-20 06:07:15,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1247 GetRequests, 1152 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=3199, Invalid=6113, Unknown=0, NotChecked=0, Total=9312 [2021-11-20 06:07:15,052 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 7335 mSDsluCounter, 3822 mSDsCounter, 0 mSdLazyCounter, 15260 mSolverCounterSat, 3131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7338 SdHoareTripleChecker+Valid, 4041 SdHoareTripleChecker+Invalid, 18391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3131 IncrementalHoareTripleChecker+Valid, 15260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:15,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7338 Valid, 4041 Invalid, 18391 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3131 Valid, 15260 Invalid, 0 Unknown, 0 Unchecked, 15.1s Time] [2021-11-20 06:07:15,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-11-20 06:07:15,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 512. [2021-11-20 06:07:15,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 324 states have (on average 1.0092592592592593) internal successors, (327), 324 states have internal predecessors, (327), 186 states have call successors, (186), 1 states have call predecessors, (186), 1 states have return successors, (186), 186 states have call predecessors, (186), 186 states have call successors, (186) [2021-11-20 06:07:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 699 transitions. [2021-11-20 06:07:15,131 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 699 transitions. Word has length 609 [2021-11-20 06:07:15,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:15,133 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 699 transitions. [2021-11-20 06:07:15,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.0303030303030303) internal successors, (200), 66 states have internal predecessors, (200), 60 states have call successors, (180), 2 states have call predecessors, (180), 2 states have return successors, (180), 60 states have call predecessors, (180), 60 states have call successors, (180) [2021-11-20 06:07:15,134 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 699 transitions. [2021-11-20 06:07:15,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1250 [2021-11-20 06:07:15,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:15,189 INFO L514 BasicCegarLoop]: trace histogram [186, 186, 186, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:15,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:15,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:07:15,402 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:15,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:15,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1471779413, now seen corresponding path program 5 times [2021-11-20 06:07:15,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:07:15,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822450533] [2021-11-20 06:07:15,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:07:15,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:07:15,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:07:15,406 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:07:15,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 06:07:41,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 128 check-sat command(s) [2021-11-20 06:07:41,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:07:41,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-20 06:07:41,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:48,227 INFO L134 CoverageAnalysis]: Checked inductivity of 84072 backedges. 0 proven. 11408 refuted. 0 times theorem prover too weak. 72664 trivial. 0 not checked. [2021-11-20 06:07:48,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:08:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 84072 backedges. 0 proven. 11408 refuted. 0 times theorem prover too weak. 72664 trivial. 0 not checked. [2021-11-20 06:08:10,337 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:08:10,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822450533] [2021-11-20 06:08:10,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822450533] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:08:10,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:08:10,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 68] total 132 [2021-11-20 06:08:10,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439281588] [2021-11-20 06:08:10,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:08:10,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-11-20 06:08:10,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:08:10,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-11-20 06:08:10,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4485, Invalid=12807, Unknown=0, NotChecked=0, Total=17292 [2021-11-20 06:08:10,351 INFO L87 Difference]: Start difference. First operand 512 states and 699 transitions. Second operand has 132 states, 132 states have (on average 2.9696969696969697) internal successors, (392), 132 states have internal predecessors, (392), 124 states have call successors, (372), 2 states have call predecessors, (372), 2 states have return successors, (372), 124 states have call predecessors, (372), 124 states have call successors, (372) [2021-11-20 06:11:46,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:46,735 INFO L93 Difference]: Finished difference Result 1902 states and 2410 transitions. [2021-11-20 06:11:46,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-11-20 06:11:46,737 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.9696969696969697) internal successors, (392), 132 states have internal predecessors, (392), 124 states have call successors, (372), 2 states have call predecessors, (372), 2 states have return successors, (372), 124 states have call predecessors, (372), 124 states have call successors, (372) Word has length 1249 [2021-11-20 06:11:46,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:46,751 INFO L225 Difference]: With dead ends: 1902 [2021-11-20 06:11:46,752 INFO L226 Difference]: Without dead ends: 1769 [2021-11-20 06:11:46,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2560 GetRequests, 2366 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6344 ImplicationChecksByTransitivity, 164.0s TimeCoverageRelationStatistics Valid=12909, Invalid=25311, Unknown=0, NotChecked=0, Total=38220 [2021-11-20 06:11:46,763 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 24862 mSDsluCounter, 15827 mSDsCounter, 0 mSdLazyCounter, 60025 mSolverCounterSat, 10575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24865 SdHoareTripleChecker+Valid, 16270 SdHoareTripleChecker+Invalid, 70600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 10575 IncrementalHoareTripleChecker+Valid, 60025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:46,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24865 Valid, 16270 Invalid, 70600 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [10575 Valid, 60025 Invalid, 0 Unknown, 0 Unchecked, 64.8s Time] [2021-11-20 06:11:46,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2021-11-20 06:11:46,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1024. [2021-11-20 06:11:46,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 644 states have (on average 1.0046583850931676) internal successors, (647), 644 states have internal predecessors, (647), 378 states have call successors, (378), 1 states have call predecessors, (378), 1 states have return successors, (378), 378 states have call predecessors, (378), 378 states have call successors, (378) [2021-11-20 06:11:46,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1403 transitions. [2021-11-20 06:11:46,849 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1403 transitions. Word has length 1249 [2021-11-20 06:11:46,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:46,852 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 1403 transitions. [2021-11-20 06:11:46,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.9696969696969697) internal successors, (392), 132 states have internal predecessors, (392), 124 states have call successors, (372), 2 states have call predecessors, (372), 2 states have return successors, (372), 124 states have call predecessors, (372), 124 states have call successors, (372) [2021-11-20 06:11:46,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1403 transitions. [2021-11-20 06:11:46,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2530 [2021-11-20 06:11:46,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:46,969 INFO L514 BasicCegarLoop]: trace histogram [378, 378, 378, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:46,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:47,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:11:47,170 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:47,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:47,171 INFO L85 PathProgramCache]: Analyzing trace with hash 2075564779, now seen corresponding path program 6 times [2021-11-20 06:11:47,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:11:47,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [84460213] [2021-11-20 06:11:47,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:11:47,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:11:47,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:11:47,175 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:11:47,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86070799-181c-4acf-81d0-0fef7dd1bdf0/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process