./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label59.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_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/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_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label59.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/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_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/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 e95469d39d3368d14177394b02d3829b8d37dd10304149f6e91cf64fc01c6cbc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:18:56,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:18:56,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:18:56,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:18:56,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:18:56,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:18:56,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:18:56,417 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:18:56,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:18:56,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:18:56,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:18:56,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:18:56,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:18:56,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:18:56,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:18:56,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:18:56,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:18:56,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:18:56,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:18:56,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:18:56,439 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:18:56,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:18:56,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:18:56,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:18:56,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:18:56,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:18:56,449 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:18:56,450 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:18:56,455 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:18:56,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:18:56,457 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:18:56,458 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:18:56,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:18:56,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:18:56,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:18:56,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:18:56,466 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:18:56,466 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:18:56,467 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:18:56,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:18:56,469 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:18:56,470 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:18:56,513 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:18:56,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:18:56,518 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:18:56,524 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:18:56,525 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:18:56,526 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:18:56,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:18:56,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:18:56,528 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:18:56,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:18:56,530 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:18:56,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:18:56,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:18:56,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:18:56,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:18:56,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:18:56,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:18:56,532 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:18:56,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:18:56,533 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:18:56,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:18:56,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:18:56,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:18:56,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:18:56,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:18:56,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:18:56,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:18:56,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:18:56,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:18:56,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:18:56,538 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:18:56,538 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:18:56,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:18:56,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:18:56,539 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_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e95469d39d3368d14177394b02d3829b8d37dd10304149f6e91cf64fc01c6cbc [2021-11-20 07:18:56,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:18:56,894 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:18:56,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:18:56,899 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:18:56,899 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:18:56,901 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/eca-rers2012/Problem13_label59.c [2021-11-20 07:18:56,982 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/data/366c8a5c3/7279bbb3767a46f391dbecd658dcc6fe/FLAG38105c426 [2021-11-20 07:18:57,915 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:18:57,916 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/sv-benchmarks/c/eca-rers2012/Problem13_label59.c [2021-11-20 07:18:57,957 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/data/366c8a5c3/7279bbb3767a46f391dbecd658dcc6fe/FLAG38105c426 [2021-11-20 07:18:58,393 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/data/366c8a5c3/7279bbb3767a46f391dbecd658dcc6fe [2021-11-20 07:18:58,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:18:58,397 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:18:58,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:18:58,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:18:58,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:18:58,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:18:58" (1/1) ... [2021-11-20 07:18:58,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@280eed5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:58, skipping insertion in model container [2021-11-20 07:18:58,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:18:58" (1/1) ... [2021-11-20 07:18:58,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:18:58,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:18:58,952 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_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/sv-benchmarks/c/eca-rers2012/Problem13_label59.c[6607,6620] [2021-11-20 07:19:00,152 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:19:00,161 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:19:00,204 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_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/sv-benchmarks/c/eca-rers2012/Problem13_label59.c[6607,6620] [2021-11-20 07:19:00,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:19:00,898 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:19:00,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:00 WrapperNode [2021-11-20 07:19:00,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:19:00,900 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:19:00,900 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:19:00,900 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:19:00,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:00" (1/1) ... [2021-11-20 07:19:01,006 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:00" (1/1) ... [2021-11-20 07:19:01,645 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-11-20 07:19:01,645 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:19:01,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:19:01,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:19:01,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:19:01,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:00" (1/1) ... [2021-11-20 07:19:01,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:00" (1/1) ... [2021-11-20 07:19:01,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:00" (1/1) ... [2021-11-20 07:19:01,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:00" (1/1) ... [2021-11-20 07:19:02,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:00" (1/1) ... [2021-11-20 07:19:02,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:00" (1/1) ... [2021-11-20 07:19:02,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:00" (1/1) ... [2021-11-20 07:19:02,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:19:02,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:19:02,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:19:02,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:19:02,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:00" (1/1) ... [2021-11-20 07:19:02,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:19:02,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:19:02,628 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:19:02,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:19:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:19:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:19:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:19:02,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:19:02,885 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:19:02,898 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:19:08,728 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:19:08,751 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:19:08,752 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 07:19:08,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:19:08 BoogieIcfgContainer [2021-11-20 07:19:08,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:19:08,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:19:08,832 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:19:08,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:19:08,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:18:58" (1/3) ... [2021-11-20 07:19:08,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dbb3b85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:19:08, skipping insertion in model container [2021-11-20 07:19:08,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:00" (2/3) ... [2021-11-20 07:19:08,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dbb3b85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:19:08, skipping insertion in model container [2021-11-20 07:19:08,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:19:08" (3/3) ... [2021-11-20 07:19:08,848 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label59.c [2021-11-20 07:19:08,854 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:19:08,854 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:19:08,926 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:19:08,933 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 07:19:08,934 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:19:08,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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 07:19:08,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 07:19:08,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:08,999 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:08,999 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:09,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:09,005 INFO L85 PathProgramCache]: Analyzing trace with hash 291089130, now seen corresponding path program 1 times [2021-11-20 07:19:09,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:09,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909345867] [2021-11-20 07:19:09,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:09,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:09,274 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 07:19:09,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:09,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909345867] [2021-11-20 07:19:09,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909345867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:09,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:09,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:19:09,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937484111] [2021-11-20 07:19:09,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:09,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:19:09,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:09,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:19:09,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:19:09,328 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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) Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 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 07:19:15,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:15,522 INFO L93 Difference]: Finished difference Result 3160 states and 5843 transitions. [2021-11-20 07:19:15,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:19:15,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 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 46 [2021-11-20 07:19:15,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:15,560 INFO L225 Difference]: With dead ends: 3160 [2021-11-20 07:19:15,560 INFO L226 Difference]: Without dead ends: 1983 [2021-11-20 07:19:15,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:19:15,571 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 1057 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:15,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 340 Invalid, 4004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-11-20 07:19:15,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-11-20 07:19:15,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1930. [2021-11-20 07:19:15,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1929 states have (on average 1.7973043027475375) internal successors, (3467), 1929 states have internal predecessors, (3467), 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 07:19:15,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3467 transitions. [2021-11-20 07:19:15,734 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3467 transitions. Word has length 46 [2021-11-20 07:19:15,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:15,734 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 3467 transitions. [2021-11-20 07:19:15,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 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 07:19:15,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3467 transitions. [2021-11-20 07:19:15,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 07:19:15,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:15,751 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:15,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:19:15,752 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:15,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:15,755 INFO L85 PathProgramCache]: Analyzing trace with hash -928496590, now seen corresponding path program 1 times [2021-11-20 07:19:15,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:15,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565498528] [2021-11-20 07:19:15,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:15,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:19:16,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:16,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565498528] [2021-11-20 07:19:16,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565498528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:16,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:16,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:19:16,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295006392] [2021-11-20 07:19:16,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:16,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:19:16,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:16,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:19:16,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:19:16,021 INFO L87 Difference]: Start difference. First operand 1930 states and 3467 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 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 07:19:20,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:20,455 INFO L93 Difference]: Finished difference Result 5456 states and 9917 transitions. [2021-11-20 07:19:20,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:19:20,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 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 111 [2021-11-20 07:19:20,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:20,481 INFO L225 Difference]: With dead ends: 5456 [2021-11-20 07:19:20,481 INFO L226 Difference]: Without dead ends: 3528 [2021-11-20 07:19:20,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:19:20,487 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 923 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 3187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:20,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 1007 Invalid, 3187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-20 07:19:20,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2021-11-20 07:19:20,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 3526. [2021-11-20 07:19:20,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3525 states have (on average 1.5670921985815602) internal successors, (5524), 3525 states have internal predecessors, (5524), 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 07:19:20,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 5524 transitions. [2021-11-20 07:19:20,696 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 5524 transitions. Word has length 111 [2021-11-20 07:19:20,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:20,700 INFO L470 AbstractCegarLoop]: Abstraction has 3526 states and 5524 transitions. [2021-11-20 07:19:20,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 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 07:19:20,701 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 5524 transitions. [2021-11-20 07:19:20,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-20 07:19:20,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:20,708 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:20,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:19:20,712 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:20,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:20,713 INFO L85 PathProgramCache]: Analyzing trace with hash 2127816963, now seen corresponding path program 1 times [2021-11-20 07:19:20,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:20,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917421244] [2021-11-20 07:19:20,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:20,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:19:20,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:20,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917421244] [2021-11-20 07:19:20,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917421244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:20,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:20,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:19:20,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334959922] [2021-11-20 07:19:20,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:20,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:19:20,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:20,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:19:20,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:19:20,852 INFO L87 Difference]: Start difference. First operand 3526 states and 5524 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 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 07:19:24,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:24,576 INFO L93 Difference]: Finished difference Result 10234 states and 16098 transitions. [2021-11-20 07:19:24,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:19:24,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 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 117 [2021-11-20 07:19:24,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:24,626 INFO L225 Difference]: With dead ends: 10234 [2021-11-20 07:19:24,627 INFO L226 Difference]: Without dead ends: 6710 [2021-11-20 07:19:24,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:19:24,635 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 973 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2535 mSolverCounterSat, 774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 3309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 774 IncrementalHoareTripleChecker+Valid, 2535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:24,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [973 Valid, 852 Invalid, 3309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [774 Valid, 2535 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-20 07:19:24,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6710 states. [2021-11-20 07:19:24,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6710 to 6700. [2021-11-20 07:19:24,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6700 states, 6699 states have (on average 1.413046723391551) internal successors, (9466), 6699 states have internal predecessors, (9466), 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 07:19:24,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6700 states to 6700 states and 9466 transitions. [2021-11-20 07:19:24,812 INFO L78 Accepts]: Start accepts. Automaton has 6700 states and 9466 transitions. Word has length 117 [2021-11-20 07:19:24,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:24,813 INFO L470 AbstractCegarLoop]: Abstraction has 6700 states and 9466 transitions. [2021-11-20 07:19:24,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 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 07:19:24,813 INFO L276 IsEmpty]: Start isEmpty. Operand 6700 states and 9466 transitions. [2021-11-20 07:19:24,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-20 07:19:24,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:24,816 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:24,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:19:24,816 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:24,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:24,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1371058456, now seen corresponding path program 1 times [2021-11-20 07:19:24,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:24,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642285644] [2021-11-20 07:19:24,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:24,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:19:24,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:24,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642285644] [2021-11-20 07:19:24,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642285644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:24,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:24,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:19:24,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779788055] [2021-11-20 07:19:24,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:24,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:19:24,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:24,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:19:24,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:19:24,914 INFO L87 Difference]: Start difference. First operand 6700 states and 9466 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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 07:19:29,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:29,569 INFO L93 Difference]: Finished difference Result 17443 states and 24479 transitions. [2021-11-20 07:19:29,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:19:29,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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 147 [2021-11-20 07:19:29,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:29,618 INFO L225 Difference]: With dead ends: 17443 [2021-11-20 07:19:29,618 INFO L226 Difference]: Without dead ends: 10745 [2021-11-20 07:19:29,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:19:29,629 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 844 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 3291 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 3741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 3291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:29,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 965 Invalid, 3741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 3291 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-20 07:19:29,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10745 states. [2021-11-20 07:19:29,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10745 to 10669. [2021-11-20 07:19:29,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 1.3562992125984252) internal successors, (14469), 10668 states have internal predecessors, (14469), 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 07:19:29,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 14469 transitions. [2021-11-20 07:19:29,885 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 14469 transitions. Word has length 147 [2021-11-20 07:19:29,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:29,887 INFO L470 AbstractCegarLoop]: Abstraction has 10669 states and 14469 transitions. [2021-11-20 07:19:29,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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 07:19:29,888 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 14469 transitions. [2021-11-20 07:19:29,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-20 07:19:29,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:29,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:29,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 07:19:29,896 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:29,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:29,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2110509215, now seen corresponding path program 1 times [2021-11-20 07:19:29,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:29,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463827294] [2021-11-20 07:19:29,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:29,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:29,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:19:30,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:30,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463827294] [2021-11-20 07:19:30,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463827294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:30,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:30,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:19:30,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599741159] [2021-11-20 07:19:30,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:30,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:19:30,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:30,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:19:30,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:19:30,109 INFO L87 Difference]: Start difference. First operand 10669 states and 14469 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 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 07:19:33,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:33,209 INFO L93 Difference]: Finished difference Result 20549 states and 28119 transitions. [2021-11-20 07:19:33,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:19:33,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 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 157 [2021-11-20 07:19:33,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:33,249 INFO L225 Difference]: With dead ends: 20549 [2021-11-20 07:19:33,250 INFO L226 Difference]: Without dead ends: 10669 [2021-11-20 07:19:33,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:19:33,261 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 678 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:33,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 1212 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-20 07:19:33,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10669 states. [2021-11-20 07:19:33,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10669 to 10669. [2021-11-20 07:19:33,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 1.3539557555305586) internal successors, (14444), 10668 states have internal predecessors, (14444), 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 07:19:33,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 14444 transitions. [2021-11-20 07:19:33,522 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 14444 transitions. Word has length 157 [2021-11-20 07:19:33,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:33,523 INFO L470 AbstractCegarLoop]: Abstraction has 10669 states and 14444 transitions. [2021-11-20 07:19:33,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 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 07:19:33,524 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 14444 transitions. [2021-11-20 07:19:33,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-20 07:19:33,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:33,528 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:33,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 07:19:33,528 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:33,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:33,529 INFO L85 PathProgramCache]: Analyzing trace with hash -339079179, now seen corresponding path program 1 times [2021-11-20 07:19:33,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:33,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309033988] [2021-11-20 07:19:33,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:33,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:19:33,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:33,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309033988] [2021-11-20 07:19:33,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309033988] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:33,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:33,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:19:33,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297693844] [2021-11-20 07:19:33,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:33,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:19:33,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:33,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:19:33,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:19:33,633 INFO L87 Difference]: Start difference. First operand 10669 states and 14444 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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 07:19:37,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:37,865 INFO L93 Difference]: Finished difference Result 29991 states and 41155 transitions. [2021-11-20 07:19:37,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:19:37,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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 171 [2021-11-20 07:19:37,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:37,911 INFO L225 Difference]: With dead ends: 29991 [2021-11-20 07:19:37,912 INFO L226 Difference]: Without dead ends: 20111 [2021-11-20 07:19:37,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:19:37,928 INFO L933 BasicCegarLoop]: 1849 mSDtfsCounter, 891 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:37,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 1988 Invalid, 3285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [806 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-20 07:19:37,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20111 states. [2021-11-20 07:19:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20111 to 19314. [2021-11-20 07:19:38,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19314 states, 19313 states have (on average 1.2808470978097655) internal successors, (24737), 19313 states have internal predecessors, (24737), 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 07:19:38,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19314 states to 19314 states and 24737 transitions. [2021-11-20 07:19:38,256 INFO L78 Accepts]: Start accepts. Automaton has 19314 states and 24737 transitions. Word has length 171 [2021-11-20 07:19:38,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:38,257 INFO L470 AbstractCegarLoop]: Abstraction has 19314 states and 24737 transitions. [2021-11-20 07:19:38,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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 07:19:38,258 INFO L276 IsEmpty]: Start isEmpty. Operand 19314 states and 24737 transitions. [2021-11-20 07:19:38,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-20 07:19:38,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:38,263 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:38,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 07:19:38,264 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:38,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:38,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1894492209, now seen corresponding path program 1 times [2021-11-20 07:19:38,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:38,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298040082] [2021-11-20 07:19:38,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:38,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:38,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-20 07:19:38,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:38,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298040082] [2021-11-20 07:19:38,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298040082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:38,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:38,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:19:38,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169203037] [2021-11-20 07:19:38,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:38,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:19:38,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:38,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:19:38,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:19:38,471 INFO L87 Difference]: Start difference. First operand 19314 states and 24737 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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 07:19:42,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:42,416 INFO L93 Difference]: Finished difference Result 44944 states and 56956 transitions. [2021-11-20 07:19:42,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:19:42,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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 258 [2021-11-20 07:19:42,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:42,466 INFO L225 Difference]: With dead ends: 44944 [2021-11-20 07:19:42,466 INFO L226 Difference]: Without dead ends: 25632 [2021-11-20 07:19:42,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:19:42,488 INFO L933 BasicCegarLoop]: 1013 mSDtfsCounter, 728 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 2701 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:42,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 1192 Invalid, 2881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2701 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-20 07:19:42,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25632 states. [2021-11-20 07:19:42,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25632 to 25622. [2021-11-20 07:19:42,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25622 states, 25621 states have (on average 1.232621677530151) internal successors, (31581), 25621 states have internal predecessors, (31581), 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 07:19:42,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25622 states to 25622 states and 31581 transitions. [2021-11-20 07:19:42,877 INFO L78 Accepts]: Start accepts. Automaton has 25622 states and 31581 transitions. Word has length 258 [2021-11-20 07:19:42,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:42,878 INFO L470 AbstractCegarLoop]: Abstraction has 25622 states and 31581 transitions. [2021-11-20 07:19:42,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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 07:19:42,879 INFO L276 IsEmpty]: Start isEmpty. Operand 25622 states and 31581 transitions. [2021-11-20 07:19:42,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-20 07:19:42,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:42,886 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:42,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 07:19:42,886 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:42,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:42,888 INFO L85 PathProgramCache]: Analyzing trace with hash -561364737, now seen corresponding path program 1 times [2021-11-20 07:19:42,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:42,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781328331] [2021-11-20 07:19:42,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:42,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:43,035 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:19:43,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:43,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781328331] [2021-11-20 07:19:43,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781328331] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:43,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:43,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:19:43,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350777069] [2021-11-20 07:19:43,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:43,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:19:43,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:43,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:19:43,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:19:43,039 INFO L87 Difference]: Start difference. First operand 25622 states and 31581 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 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 07:19:46,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:46,954 INFO L93 Difference]: Finished difference Result 72509 states and 89970 transitions. [2021-11-20 07:19:46,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:19:46,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 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 273 [2021-11-20 07:19:46,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:47,034 INFO L225 Difference]: With dead ends: 72509 [2021-11-20 07:19:47,034 INFO L226 Difference]: Without dead ends: 47676 [2021-11-20 07:19:47,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:19:47,062 INFO L933 BasicCegarLoop]: 781 mSDtfsCounter, 827 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2378 mSolverCounterSat, 916 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 3294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 916 IncrementalHoareTripleChecker+Valid, 2378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:47,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [827 Valid, 898 Invalid, 3294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [916 Valid, 2378 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-20 07:19:47,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47676 states. [2021-11-20 07:19:47,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47676 to 46091. [2021-11-20 07:19:47,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46091 states, 46090 states have (on average 1.1851377739205902) internal successors, (54623), 46090 states have internal predecessors, (54623), 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 07:19:47,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46091 states to 46091 states and 54623 transitions. [2021-11-20 07:19:47,914 INFO L78 Accepts]: Start accepts. Automaton has 46091 states and 54623 transitions. Word has length 273 [2021-11-20 07:19:47,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:47,915 INFO L470 AbstractCegarLoop]: Abstraction has 46091 states and 54623 transitions. [2021-11-20 07:19:47,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 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 07:19:47,915 INFO L276 IsEmpty]: Start isEmpty. Operand 46091 states and 54623 transitions. [2021-11-20 07:19:47,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-20 07:19:47,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:47,922 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:47,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 07:19:47,923 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:47,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:47,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1177672583, now seen corresponding path program 1 times [2021-11-20 07:19:47,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:47,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942962944] [2021-11-20 07:19:47,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:47,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 87 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:19:48,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:48,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942962944] [2021-11-20 07:19:48,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942962944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:48,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416918622] [2021-11-20 07:19:48,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:48,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:48,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:19:48,340 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:19:48,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:19:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:48,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:19:48,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:19:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-20 07:19:49,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:19:49,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416918622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:49,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:19:49,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-20 07:19:49,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011786570] [2021-11-20 07:19:49,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:49,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:19:49,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:49,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:19:49,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:19:49,133 INFO L87 Difference]: Start difference. First operand 46091 states and 54623 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 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 07:19:53,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:53,020 INFO L93 Difference]: Finished difference Result 91391 states and 108451 transitions. [2021-11-20 07:19:53,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:19:53,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 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 287 [2021-11-20 07:19:53,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:53,074 INFO L225 Difference]: With dead ends: 91391 [2021-11-20 07:19:53,074 INFO L226 Difference]: Without dead ends: 46089 [2021-11-20 07:19:53,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:19:53,102 INFO L933 BasicCegarLoop]: 1359 mSDtfsCounter, 1160 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2469 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1160 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 2914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 2469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:53,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1160 Valid, 1441 Invalid, 2914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 2469 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-20 07:19:53,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46089 states. [2021-11-20 07:19:53,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46089 to 46088. [2021-11-20 07:19:53,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46088 states, 46087 states have (on average 1.150693254062968) internal successors, (53032), 46087 states have internal predecessors, (53032), 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 07:19:53,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46088 states to 46088 states and 53032 transitions. [2021-11-20 07:19:53,988 INFO L78 Accepts]: Start accepts. Automaton has 46088 states and 53032 transitions. Word has length 287 [2021-11-20 07:19:53,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:53,989 INFO L470 AbstractCegarLoop]: Abstraction has 46088 states and 53032 transitions. [2021-11-20 07:19:53,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 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 07:19:53,989 INFO L276 IsEmpty]: Start isEmpty. Operand 46088 states and 53032 transitions. [2021-11-20 07:19:54,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-11-20 07:19:54,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:54,002 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:54,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:19:54,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:54,219 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:54,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:54,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1768426365, now seen corresponding path program 1 times [2021-11-20 07:19:54,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:54,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886380721] [2021-11-20 07:19:54,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:54,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:54,749 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 216 proven. 113 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-20 07:19:54,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:54,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886380721] [2021-11-20 07:19:54,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886380721] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:54,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667470154] [2021-11-20 07:19:54,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:54,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:54,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:19:54,754 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:19:54,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:19:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:54,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:19:54,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:19:55,595 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-20 07:19:55,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:19:55,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667470154] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:55,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:19:55,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-20 07:19:55,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882593821] [2021-11-20 07:19:55,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:55,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:19:55,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:55,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:19:55,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:19:55,598 INFO L87 Difference]: Start difference. First operand 46088 states and 53032 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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 07:19:59,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:59,351 INFO L93 Difference]: Finished difference Result 91376 states and 105260 transitions. [2021-11-20 07:19:59,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:19:59,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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 352 [2021-11-20 07:19:59,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:59,390 INFO L225 Difference]: With dead ends: 91376 [2021-11-20 07:19:59,390 INFO L226 Difference]: Without dead ends: 46077 [2021-11-20 07:19:59,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:19:59,410 INFO L933 BasicCegarLoop]: 686 mSDtfsCounter, 1075 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 2392 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 2919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 2392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:59,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1075 Valid, 817 Invalid, 2919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 2392 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-20 07:19:59,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46077 states. [2021-11-20 07:19:59,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46077 to 46074. [2021-11-20 07:19:59,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46074 states, 46073 states have (on average 1.1090443426735832) internal successors, (51097), 46073 states have internal predecessors, (51097), 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 07:20:00,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46074 states to 46074 states and 51097 transitions. [2021-11-20 07:20:00,182 INFO L78 Accepts]: Start accepts. Automaton has 46074 states and 51097 transitions. Word has length 352 [2021-11-20 07:20:00,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:00,183 INFO L470 AbstractCegarLoop]: Abstraction has 46074 states and 51097 transitions. [2021-11-20 07:20:00,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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 07:20:00,183 INFO L276 IsEmpty]: Start isEmpty. Operand 46074 states and 51097 transitions. [2021-11-20 07:20:00,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2021-11-20 07:20:00,210 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:00,210 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:00,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:20:00,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 07:20:00,426 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:00,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:00,427 INFO L85 PathProgramCache]: Analyzing trace with hash 143007617, now seen corresponding path program 1 times [2021-11-20 07:20:00,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:00,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128310068] [2021-11-20 07:20:00,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:00,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 478 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 07:20:00,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:00,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128310068] [2021-11-20 07:20:00,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128310068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:00,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:00,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:20:00,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462433298] [2021-11-20 07:20:00,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:00,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:20:00,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:00,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:20:00,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:20:00,624 INFO L87 Difference]: Start difference. First operand 46074 states and 51097 transitions. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 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 07:20:08,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:08,980 INFO L93 Difference]: Finished difference Result 122259 states and 136283 transitions. [2021-11-20 07:20:08,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:20:08,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 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 394 [2021-11-20 07:20:08,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:09,077 INFO L225 Difference]: With dead ends: 122259 [2021-11-20 07:20:09,077 INFO L226 Difference]: Without dead ends: 76974 [2021-11-20 07:20:09,100 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 07:20:09,101 INFO L933 BasicCegarLoop]: 653 mSDtfsCounter, 1701 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 6751 mSolverCounterSat, 1003 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1701 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 7754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1003 IncrementalHoareTripleChecker+Valid, 6751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:09,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1701 Valid, 892 Invalid, 7754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1003 Valid, 6751 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2021-11-20 07:20:09,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76974 states. [2021-11-20 07:20:09,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76974 to 57894. [2021-11-20 07:20:09,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57894 states, 57893 states have (on average 1.1003575561812309) internal successors, (63703), 57893 states have internal predecessors, (63703), 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 07:20:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57894 states to 57894 states and 63703 transitions. [2021-11-20 07:20:10,131 INFO L78 Accepts]: Start accepts. Automaton has 57894 states and 63703 transitions. Word has length 394 [2021-11-20 07:20:10,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:10,132 INFO L470 AbstractCegarLoop]: Abstraction has 57894 states and 63703 transitions. [2021-11-20 07:20:10,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 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 07:20:10,132 INFO L276 IsEmpty]: Start isEmpty. Operand 57894 states and 63703 transitions. [2021-11-20 07:20:10,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-11-20 07:20:10,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:10,140 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:10,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 07:20:10,141 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:10,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:10,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1259811683, now seen corresponding path program 1 times [2021-11-20 07:20:10,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:10,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116984311] [2021-11-20 07:20:10,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:10,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:10,330 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 315 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-20 07:20:10,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:10,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116984311] [2021-11-20 07:20:10,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116984311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:10,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:10,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:20:10,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292155136] [2021-11-20 07:20:10,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:10,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:20:10,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:10,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:20:10,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:20:10,334 INFO L87 Difference]: Start difference. First operand 57894 states and 63703 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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 07:20:14,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:14,700 INFO L93 Difference]: Finished difference Result 139407 states and 154440 transitions. [2021-11-20 07:20:14,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:20:14,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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 407 [2021-11-20 07:20:14,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:14,937 INFO L225 Difference]: With dead ends: 139407 [2021-11-20 07:20:14,937 INFO L226 Difference]: Without dead ends: 82302 [2021-11-20 07:20:14,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:20:14,966 INFO L933 BasicCegarLoop]: 751 mSDtfsCounter, 831 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2406 mSolverCounterSat, 963 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 3369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 963 IncrementalHoareTripleChecker+Valid, 2406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:14,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [831 Valid, 833 Invalid, 3369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [963 Valid, 2406 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-20 07:20:15,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82302 states. [2021-11-20 07:20:15,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82302 to 80710. [2021-11-20 07:20:15,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80710 states, 80709 states have (on average 1.1005959682315478) internal successors, (88828), 80709 states have internal predecessors, (88828), 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 07:20:16,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80710 states to 80710 states and 88828 transitions. [2021-11-20 07:20:16,073 INFO L78 Accepts]: Start accepts. Automaton has 80710 states and 88828 transitions. Word has length 407 [2021-11-20 07:20:16,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:16,074 INFO L470 AbstractCegarLoop]: Abstraction has 80710 states and 88828 transitions. [2021-11-20 07:20:16,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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 07:20:16,075 INFO L276 IsEmpty]: Start isEmpty. Operand 80710 states and 88828 transitions. [2021-11-20 07:20:16,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2021-11-20 07:20:16,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:16,085 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:16,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 07:20:16,085 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:16,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:16,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1404182117, now seen corresponding path program 1 times [2021-11-20 07:20:16,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:16,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003749577] [2021-11-20 07:20:16,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:16,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 369 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-20 07:20:16,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:16,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003749577] [2021-11-20 07:20:16,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003749577] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:16,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:16,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:20:16,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542606969] [2021-11-20 07:20:16,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:16,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:20:16,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:16,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:20:16,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:20:16,263 INFO L87 Difference]: Start difference. First operand 80710 states and 88828 transitions. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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 07:20:20,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:20,459 INFO L93 Difference]: Finished difference Result 182696 states and 200598 transitions. [2021-11-20 07:20:20,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:20:20,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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 427 [2021-11-20 07:20:20,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:20,584 INFO L225 Difference]: With dead ends: 182696 [2021-11-20 07:20:20,584 INFO L226 Difference]: Without dead ends: 102775 [2021-11-20 07:20:20,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:20:20,625 INFO L933 BasicCegarLoop]: 974 mSDtfsCounter, 804 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 2466 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 2842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 2466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:20,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 1114 Invalid, 2842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 2466 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-20 07:20:20,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102775 states. [2021-11-20 07:20:21,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102775 to 98815. [2021-11-20 07:20:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98815 states, 98814 states have (on average 1.0907260104843444) internal successors, (107779), 98814 states have internal predecessors, (107779), 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 07:20:22,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98815 states to 98815 states and 107779 transitions. [2021-11-20 07:20:22,455 INFO L78 Accepts]: Start accepts. Automaton has 98815 states and 107779 transitions. Word has length 427 [2021-11-20 07:20:22,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:22,483 INFO L470 AbstractCegarLoop]: Abstraction has 98815 states and 107779 transitions. [2021-11-20 07:20:22,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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 07:20:22,483 INFO L276 IsEmpty]: Start isEmpty. Operand 98815 states and 107779 transitions. [2021-11-20 07:20:22,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2021-11-20 07:20:22,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:22,511 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:22,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 07:20:22,526 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:22,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:22,527 INFO L85 PathProgramCache]: Analyzing trace with hash -625667605, now seen corresponding path program 1 times [2021-11-20 07:20:22,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:22,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681425148] [2021-11-20 07:20:22,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:22,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:22,976 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 385 proven. 113 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 07:20:22,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:22,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681425148] [2021-11-20 07:20:22,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681425148] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:20:22,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022824322] [2021-11-20 07:20:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:22,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:20:22,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:20:22,979 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:20:22,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:20:23,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:23,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:20:23,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:20:24,048 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2021-11-20 07:20:24,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:20:24,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022824322] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:24,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:20:24,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-20 07:20:24,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455547735] [2021-11-20 07:20:24,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:24,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:20:24,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:24,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:20:24,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:20:24,052 INFO L87 Difference]: Start difference. First operand 98815 states and 107779 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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 07:20:28,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:28,705 INFO L93 Difference]: Finished difference Result 198419 states and 216356 transitions. [2021-11-20 07:20:28,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:20:28,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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 437 [2021-11-20 07:20:28,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:29,079 INFO L225 Difference]: With dead ends: 198419 [2021-11-20 07:20:29,080 INFO L226 Difference]: Without dead ends: 100393 [2021-11-20 07:20:29,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:20:29,108 INFO L933 BasicCegarLoop]: 1385 mSDtfsCounter, 993 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 3093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 2486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:29,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [993 Valid, 1471 Invalid, 3093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 2486 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-20 07:20:29,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100393 states. [2021-11-20 07:20:30,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100393 to 98807. [2021-11-20 07:20:30,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98807 states, 98806 states have (on average 1.067111309029816) internal successors, (105437), 98806 states have internal predecessors, (105437), 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 07:20:30,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98807 states to 98807 states and 105437 transitions. [2021-11-20 07:20:30,363 INFO L78 Accepts]: Start accepts. Automaton has 98807 states and 105437 transitions. Word has length 437 [2021-11-20 07:20:30,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:30,364 INFO L470 AbstractCegarLoop]: Abstraction has 98807 states and 105437 transitions. [2021-11-20 07:20:30,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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 07:20:30,364 INFO L276 IsEmpty]: Start isEmpty. Operand 98807 states and 105437 transitions. [2021-11-20 07:20:30,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-11-20 07:20:30,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:30,381 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:30,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:20:30,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:20:30,587 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:30,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:30,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1887672211, now seen corresponding path program 1 times [2021-11-20 07:20:30,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:30,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162085525] [2021-11-20 07:20:30,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:30,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 612 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-20 07:20:30,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:30,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162085525] [2021-11-20 07:20:30,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162085525] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:30,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:30,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:20:30,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100106316] [2021-11-20 07:20:30,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:30,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:20:30,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:30,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:20:30,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:20:30,799 INFO L87 Difference]: Start difference. First operand 98807 states and 105437 transitions. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 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 07:20:37,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:37,358 INFO L93 Difference]: Finished difference Result 241040 states and 257884 transitions. [2021-11-20 07:20:37,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:20:37,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 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 477 [2021-11-20 07:20:37,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:37,549 INFO L225 Difference]: With dead ends: 241040 [2021-11-20 07:20:37,549 INFO L226 Difference]: Without dead ends: 143022 [2021-11-20 07:20:37,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:20:37,602 INFO L933 BasicCegarLoop]: 640 mSDtfsCounter, 845 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2970 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 3580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 2970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:37,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 752 Invalid, 3580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [610 Valid, 2970 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-20 07:20:37,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143022 states. [2021-11-20 07:20:39,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143022 to 118493. [2021-11-20 07:20:39,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118493 states, 118492 states have (on average 1.0664686223542517) internal successors, (126368), 118492 states have internal predecessors, (126368), 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 07:20:39,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118493 states to 118493 states and 126368 transitions. [2021-11-20 07:20:39,883 INFO L78 Accepts]: Start accepts. Automaton has 118493 states and 126368 transitions. Word has length 477 [2021-11-20 07:20:39,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:39,883 INFO L470 AbstractCegarLoop]: Abstraction has 118493 states and 126368 transitions. [2021-11-20 07:20:39,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 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 07:20:39,884 INFO L276 IsEmpty]: Start isEmpty. Operand 118493 states and 126368 transitions. [2021-11-20 07:20:39,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2021-11-20 07:20:39,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:39,897 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:39,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 07:20:39,897 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:39,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:39,897 INFO L85 PathProgramCache]: Analyzing trace with hash -647290550, now seen corresponding path program 1 times [2021-11-20 07:20:39,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:39,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455108036] [2021-11-20 07:20:39,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:39,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:40,300 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 540 proven. 113 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-20 07:20:40,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:40,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455108036] [2021-11-20 07:20:40,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455108036] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:20:40,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637712209] [2021-11-20 07:20:40,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:40,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:20:40,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:20:40,302 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:20:40,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:20:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:40,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:20:40,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:20:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 628 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-20 07:20:41,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:20:41,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637712209] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:41,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:20:41,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-20 07:20:41,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795438204] [2021-11-20 07:20:41,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:41,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:20:41,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:41,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:20:41,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:20:41,523 INFO L87 Difference]: Start difference. First operand 118493 states and 126368 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 07:20:46,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:46,165 INFO L93 Difference]: Finished difference Result 230661 states and 246978 transitions. [2021-11-20 07:20:46,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:20:46,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 518 [2021-11-20 07:20:46,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:46,312 INFO L225 Difference]: With dead ends: 230661 [2021-11-20 07:20:46,312 INFO L226 Difference]: Without dead ends: 128703 [2021-11-20 07:20:46,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:20:46,357 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 1201 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1201 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 3068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:46,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1201 Valid, 390 Invalid, 3068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [807 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-20 07:20:46,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128703 states. [2021-11-20 07:20:48,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128703 to 128703. [2021-11-20 07:20:48,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128703 states, 128702 states have (on average 1.0603331727556682) internal successors, (136467), 128702 states have internal predecessors, (136467), 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 07:20:48,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128703 states to 128703 states and 136467 transitions. [2021-11-20 07:20:48,580 INFO L78 Accepts]: Start accepts. Automaton has 128703 states and 136467 transitions. Word has length 518 [2021-11-20 07:20:48,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:48,581 INFO L470 AbstractCegarLoop]: Abstraction has 128703 states and 136467 transitions. [2021-11-20 07:20:48,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 07:20:48,581 INFO L276 IsEmpty]: Start isEmpty. Operand 128703 states and 136467 transitions. [2021-11-20 07:20:48,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2021-11-20 07:20:48,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:48,596 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:48,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-20 07:20:48,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 07:20:48,797 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:48,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:48,797 INFO L85 PathProgramCache]: Analyzing trace with hash -2103393123, now seen corresponding path program 1 times [2021-11-20 07:20:48,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:48,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978858410] [2021-11-20 07:20:48,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:48,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 328 proven. 110 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-20 07:20:49,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:49,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978858410] [2021-11-20 07:20:49,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978858410] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:20:49,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378502165] [2021-11-20 07:20:49,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:49,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:20:49,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:20:49,098 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:20:49,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:20:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:49,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:20:49,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:20:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-11-20 07:20:50,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:20:50,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378502165] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:50,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:20:50,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-11-20 07:20:50,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605206712] [2021-11-20 07:20:50,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:50,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:20:50,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:50,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:20:50,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:20:50,184 INFO L87 Difference]: Start difference. First operand 128703 states and 136467 transitions. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 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 07:20:56,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:56,173 INFO L93 Difference]: Finished difference Result 280220 states and 298586 transitions. [2021-11-20 07:20:56,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:20:56,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 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 542 [2021-11-20 07:20:56,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:56,372 INFO L225 Difference]: With dead ends: 280220 [2021-11-20 07:20:56,372 INFO L226 Difference]: Without dead ends: 168052 [2021-11-20 07:20:56,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 541 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:20:56,411 INFO L933 BasicCegarLoop]: 1541 mSDtfsCounter, 846 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2796 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 1692 SdHoareTripleChecker+Invalid, 3281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 2796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:56,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [846 Valid, 1692 Invalid, 3281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 2796 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-20 07:20:56,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168052 states. [2021-11-20 07:20:59,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168052 to 168052. [2021-11-20 07:20:59,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168052 states, 168051 states have (on average 1.0585119993335357) internal successors, (177884), 168051 states have internal predecessors, (177884), 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 07:20:59,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168052 states to 168052 states and 177884 transitions. [2021-11-20 07:20:59,521 INFO L78 Accepts]: Start accepts. Automaton has 168052 states and 177884 transitions. Word has length 542 [2021-11-20 07:20:59,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:59,522 INFO L470 AbstractCegarLoop]: Abstraction has 168052 states and 177884 transitions. [2021-11-20 07:20:59,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 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 07:20:59,523 INFO L276 IsEmpty]: Start isEmpty. Operand 168052 states and 177884 transitions. [2021-11-20 07:20:59,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2021-11-20 07:20:59,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:59,547 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:59,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-20 07:20:59,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc191a0-16d1-420c-8268-7dd55fcdf2ac/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 07:20:59,767 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:59,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:59,767 INFO L85 PathProgramCache]: Analyzing trace with hash -216386824, now seen corresponding path program 1 times [2021-11-20 07:20:59,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:59,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122981641] [2021-11-20 07:20:59,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:59,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 356 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-20 07:21:00,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:21:00,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122981641] [2021-11-20 07:21:00,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122981641] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:21:00,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:21:00,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:21:00,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434902619] [2021-11-20 07:21:00,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:21:00,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:21:00,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:21:00,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:21:00,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:21:00,006 INFO L87 Difference]: Start difference. First operand 168052 states and 177884 transitions. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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 07:21:05,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:21:05,609 INFO L93 Difference]: Finished difference Result 366804 states and 389131 transitions. [2021-11-20 07:21:05,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:21:05,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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 548 [2021-11-20 07:21:05,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:21:05,904 INFO L225 Difference]: With dead ends: 366804 [2021-11-20 07:21:05,904 INFO L226 Difference]: Without dead ends: 199541 [2021-11-20 07:21:05,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:21:05,985 INFO L933 BasicCegarLoop]: 1735 mSDtfsCounter, 747 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1870 SdHoareTripleChecker+Invalid, 2928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 2486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:21:05,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 1870 Invalid, 2928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 2486 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-20 07:21:06,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199541 states. [2021-11-20 07:21:09,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199541 to 197170. [2021-11-20 07:21:09,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197170 states, 197169 states have (on average 1.0545268272395762) internal successors, (207920), 197169 states have internal predecessors, (207920), 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)