./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13801fa2c96f7c93ace2086dcc65f456b83ac056f84901412492a5919d95dd03 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:13:10,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:13:10,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:13:10,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:13:10,498 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:13:10,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:13:10,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:13:10,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:13:10,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:13:10,504 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:13:10,505 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:13:10,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:13:10,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:13:10,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:13:10,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:13:10,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:13:10,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:13:10,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:13:10,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:13:10,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:13:10,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:13:10,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:13:10,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:13:10,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:13:10,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:13:10,523 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:13:10,523 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:13:10,524 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:13:10,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:13:10,525 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:13:10,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:13:10,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:13:10,527 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:13:10,528 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:13:10,529 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:13:10,529 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:13:10,529 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:13:10,529 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:13:10,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:13:10,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:13:10,531 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:13:10,532 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 19:13:10,559 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:13:10,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:13:10,560 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:13:10,560 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:13:10,560 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:13:10,561 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:13:10,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:13:10,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:13:10,561 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:13:10,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:13:10,562 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:13:10,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:13:10,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:13:10,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:13:10,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:13:10,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:13:10,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:13:10,563 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:13:10,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:13:10,563 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:13:10,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:13:10,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:13:10,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:13:10,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:13:10,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:13:10,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:13:10,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:13:10,569 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:13:10,569 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:13:10,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:13:10,570 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:13:10,570 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:13:10,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:13:10,570 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:13:10,570 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_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13801fa2c96f7c93ace2086dcc65f456b83ac056f84901412492a5919d95dd03 [2021-12-06 19:13:10,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:13:10,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:13:10,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:13:10,768 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:13:10,768 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:13:10,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c [2021-12-06 19:13:10,810 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/data/900740f66/9556a944ef1140528ccb85503b20f8a3/FLAGf6f7f9589 [2021-12-06 19:13:11,188 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:13:11,189 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c [2021-12-06 19:13:11,198 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/data/900740f66/9556a944ef1140528ccb85503b20f8a3/FLAGf6f7f9589 [2021-12-06 19:13:11,208 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/data/900740f66/9556a944ef1140528ccb85503b20f8a3 [2021-12-06 19:13:11,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:13:11,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:13:11,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:13:11,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:13:11,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:13:11,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:13:11" (1/1) ... [2021-12-06 19:13:11,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d23e07a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:11, skipping insertion in model container [2021-12-06 19:13:11,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:13:11" (1/1) ... [2021-12-06 19:13:11,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:13:11,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:13:11,359 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_4601c346-d559-4ece-93ae-2aca09d40c57/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[1995,2008] [2021-12-06 19:13:11,362 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_4601c346-d559-4ece-93ae-2aca09d40c57/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[2364,2377] [2021-12-06 19:13:11,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:13:11,399 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:13:11,411 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_4601c346-d559-4ece-93ae-2aca09d40c57/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[1995,2008] [2021-12-06 19:13:11,412 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_4601c346-d559-4ece-93ae-2aca09d40c57/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[2364,2377] [2021-12-06 19:13:11,435 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:13:11,445 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:13:11,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:11 WrapperNode [2021-12-06 19:13:11,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:13:11,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:13:11,446 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:13:11,446 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:13:11,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:11" (1/1) ... [2021-12-06 19:13:11,458 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:11" (1/1) ... [2021-12-06 19:13:11,480 INFO L137 Inliner]: procedures = 27, calls = 21, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 168 [2021-12-06 19:13:11,480 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:13:11,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:13:11,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:13:11,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:13:11,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:11" (1/1) ... [2021-12-06 19:13:11,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:11" (1/1) ... [2021-12-06 19:13:11,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:11" (1/1) ... [2021-12-06 19:13:11,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:11" (1/1) ... [2021-12-06 19:13:11,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:11" (1/1) ... [2021-12-06 19:13:11,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:11" (1/1) ... [2021-12-06 19:13:11,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:11" (1/1) ... [2021-12-06 19:13:11,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:13:11,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:13:11,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:13:11,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:13:11,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:11" (1/1) ... [2021-12-06 19:13:11,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:13:11,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:13:11,533 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:13:11,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:13:11,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:13:11,563 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-12-06 19:13:11,563 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-12-06 19:13:11,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:13:11,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:13:11,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:13:11,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 19:13:11,564 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 19:13:11,627 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:13:11,629 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:13:11,861 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:13:11,867 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:13:11,868 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 19:13:11,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:13:11 BoogieIcfgContainer [2021-12-06 19:13:11,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:13:11,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:13:11,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:13:11,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:13:11,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:13:11" (1/3) ... [2021-12-06 19:13:11,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34989295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:13:11, skipping insertion in model container [2021-12-06 19:13:11,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:11" (2/3) ... [2021-12-06 19:13:11,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34989295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:13:11, skipping insertion in model container [2021-12-06 19:13:11,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:13:11" (3/3) ... [2021-12-06 19:13:11,875 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_1-3a.c.cil.c [2021-12-06 19:13:11,879 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:13:11,879 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 19:13:11,916 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:13:11,921 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 19:13:11,921 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 19:13:11,936 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 67 states have (on average 1.5820895522388059) internal successors, (106), 71 states have internal predecessors, (106), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 19:13:11,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 19:13:11,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:11,944 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:11,945 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:11,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:11,949 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-12-06 19:13:11,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:13:11,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422784546] [2021-12-06 19:13:11,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:11,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:13:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:12,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:13:12,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422784546] [2021-12-06 19:13:12,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422784546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:12,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:12,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:13:12,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518021121] [2021-12-06 19:13:12,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:12,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 19:13:12,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:13:12,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 19:13:12,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:13:12,085 INFO L87 Difference]: Start difference. First operand has 81 states, 67 states have (on average 1.5820895522388059) internal successors, (106), 71 states have internal predecessors, (106), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:12,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:12,114 INFO L93 Difference]: Finished difference Result 157 states and 249 transitions. [2021-12-06 19:13:12,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 19:13:12,115 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 19:13:12,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:12,122 INFO L225 Difference]: With dead ends: 157 [2021-12-06 19:13:12,123 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 19:13:12,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:13:12,129 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:12,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:13:12,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 19:13:12,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-06 19:13:12,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 64 states have internal predecessors, (91), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 19:13:12,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 108 transitions. [2021-12-06 19:13:12,165 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 108 transitions. Word has length 7 [2021-12-06 19:13:12,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:12,166 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 108 transitions. [2021-12-06 19:13:12,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:12,166 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 108 transitions. [2021-12-06 19:13:12,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 19:13:12,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:12,167 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:12,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:13:12,167 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:12,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:12,168 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-12-06 19:13:12,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:13:12,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780454816] [2021-12-06 19:13:12,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:12,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:13:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 19:13:12,188 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 19:13:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 19:13:12,211 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 19:13:12,212 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-06 19:13:12,214 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-06 19:13:12,215 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-06 19:13:12,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 19:13:12,219 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-06 19:13:12,221 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 19:13:12,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 07:13:12 BoogieIcfgContainer [2021-12-06 19:13:12,238 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 19:13:12,238 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 19:13:12,238 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 19:13:12,239 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 19:13:12,239 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:13:11" (3/4) ... [2021-12-06 19:13:12,241 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-06 19:13:12,241 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 19:13:12,242 INFO L158 Benchmark]: Toolchain (without parser) took 1031.00ms. Allocated memory was 77.6MB in the beginning and 115.3MB in the end (delta: 37.7MB). Free memory was 50.3MB in the beginning and 72.2MB in the end (delta: -22.0MB). Peak memory consumption was 16.0MB. Max. memory is 16.1GB. [2021-12-06 19:13:12,242 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 77.6MB. Free memory is still 49.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:13:12,243 INFO L158 Benchmark]: CACSL2BoogieTranslator took 234.16ms. Allocated memory was 77.6MB in the beginning and 115.3MB in the end (delta: 37.7MB). Free memory was 50.1MB in the beginning and 81.6MB in the end (delta: -31.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 19:13:12,244 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.23ms. Allocated memory is still 115.3MB. Free memory was 81.6MB in the beginning and 79.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 19:13:12,244 INFO L158 Benchmark]: Boogie Preprocessor took 22.98ms. Allocated memory is still 115.3MB. Free memory was 79.3MB in the beginning and 77.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 19:13:12,244 INFO L158 Benchmark]: RCFGBuilder took 365.20ms. Allocated memory is still 115.3MB. Free memory was 77.7MB in the beginning and 62.7MB in the end (delta: 15.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-06 19:13:12,245 INFO L158 Benchmark]: TraceAbstraction took 367.07ms. Allocated memory is still 115.3MB. Free memory was 62.2MB in the beginning and 72.7MB in the end (delta: -10.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:13:12,245 INFO L158 Benchmark]: Witness Printer took 2.72ms. Allocated memory is still 115.3MB. Free memory was 72.7MB in the beginning and 72.2MB in the end (delta: 539.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:13:12,248 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 77.6MB. Free memory is still 49.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 234.16ms. Allocated memory was 77.6MB in the beginning and 115.3MB in the end (delta: 37.7MB). Free memory was 50.1MB in the beginning and 81.6MB in the end (delta: -31.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.23ms. Allocated memory is still 115.3MB. Free memory was 81.6MB in the beginning and 79.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.98ms. Allocated memory is still 115.3MB. Free memory was 79.3MB in the beginning and 77.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 365.20ms. Allocated memory is still 115.3MB. Free memory was 77.7MB in the beginning and 62.7MB in the end (delta: 15.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 367.07ms. Allocated memory is still 115.3MB. Free memory was 62.2MB in the beginning and 72.7MB in the end (delta: -10.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 2.72ms. Allocated memory is still 115.3MB. Free memory was 72.7MB in the beginning and 72.2MB in the end (delta: 539.4kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L402] COND TRUE __VERIFIER_nondet_int() [L403] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L47] COND TRUE !(result >= 0.0f && result < 1.5f) VAL [IN=49, x=49] [L48] reach_error() VAL [IN=49, x=49] - UnprovableResult [Line: 60]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 81 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 117 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 117 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-06 19:13:12,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13801fa2c96f7c93ace2086dcc65f456b83ac056f84901412492a5919d95dd03 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:13:13,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:13:13,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:13:13,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:13:13,937 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:13:13,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:13:13,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:13:13,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:13:13,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:13:13,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:13:13,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:13:13,945 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:13:13,945 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:13:13,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:13:13,948 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:13:13,949 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:13:13,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:13:13,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:13:13,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:13:13,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:13:13,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:13:13,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:13:13,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:13:13,959 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:13:13,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:13:13,963 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:13:13,963 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:13:13,964 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:13:13,965 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:13:13,966 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:13:13,966 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:13:13,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:13:13,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:13:13,968 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:13:13,976 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:13:13,976 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:13:13,977 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:13:13,977 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:13:13,978 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:13:13,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:13:13,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:13:13,980 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-06 19:13:14,005 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:13:14,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:13:14,005 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:13:14,005 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:13:14,006 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:13:14,006 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:13:14,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:13:14,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:13:14,007 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:13:14,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:13:14,007 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:13:14,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:13:14,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:13:14,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:13:14,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:13:14,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:13:14,009 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 19:13:14,009 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 19:13:14,009 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 19:13:14,009 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:13:14,009 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:13:14,009 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:13:14,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:13:14,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:13:14,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:13:14,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:13:14,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:13:14,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:13:14,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:13:14,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:13:14,010 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 19:13:14,011 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 19:13:14,011 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:13:14,011 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:13:14,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:13:14,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:13:14,011 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 19:13:14,011 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13801fa2c96f7c93ace2086dcc65f456b83ac056f84901412492a5919d95dd03 [2021-12-06 19:13:14,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:13:14,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:13:14,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:13:14,282 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:13:14,283 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:13:14,284 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c [2021-12-06 19:13:14,326 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/data/271cfd762/56a61ec21c9143d29f7a7c17bf526414/FLAGf50375871 [2021-12-06 19:13:14,668 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:13:14,668 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c [2021-12-06 19:13:14,677 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/data/271cfd762/56a61ec21c9143d29f7a7c17bf526414/FLAGf50375871 [2021-12-06 19:13:15,053 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/data/271cfd762/56a61ec21c9143d29f7a7c17bf526414 [2021-12-06 19:13:15,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:13:15,056 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:13:15,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:13:15,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:13:15,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:13:15,061 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:13:15" (1/1) ... [2021-12-06 19:13:15,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39e0f437 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:15, skipping insertion in model container [2021-12-06 19:13:15,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:13:15" (1/1) ... [2021-12-06 19:13:15,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:13:15,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:13:15,191 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_4601c346-d559-4ece-93ae-2aca09d40c57/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[1995,2008] [2021-12-06 19:13:15,194 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_4601c346-d559-4ece-93ae-2aca09d40c57/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[2364,2377] [2021-12-06 19:13:15,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:13:15,248 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:13:15,259 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_4601c346-d559-4ece-93ae-2aca09d40c57/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[1995,2008] [2021-12-06 19:13:15,261 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_4601c346-d559-4ece-93ae-2aca09d40c57/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[2364,2377] [2021-12-06 19:13:15,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:13:15,295 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:13:15,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:15 WrapperNode [2021-12-06 19:13:15,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:13:15,297 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:13:15,297 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:13:15,297 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:13:15,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:15" (1/1) ... [2021-12-06 19:13:15,311 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:15" (1/1) ... [2021-12-06 19:13:15,330 INFO L137 Inliner]: procedures = 28, calls = 21, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 164 [2021-12-06 19:13:15,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:13:15,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:13:15,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:13:15,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:13:15,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:15" (1/1) ... [2021-12-06 19:13:15,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:15" (1/1) ... [2021-12-06 19:13:15,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:15" (1/1) ... [2021-12-06 19:13:15,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:15" (1/1) ... [2021-12-06 19:13:15,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:15" (1/1) ... [2021-12-06 19:13:15,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:15" (1/1) ... [2021-12-06 19:13:15,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:15" (1/1) ... [2021-12-06 19:13:15,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:13:15,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:13:15,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:13:15,358 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:13:15,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:15" (1/1) ... [2021-12-06 19:13:15,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:13:15,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:13:15,382 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:13:15,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:13:15,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:13:15,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-06 19:13:15,411 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-12-06 19:13:15,411 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-12-06 19:13:15,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:13:15,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:13:15,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 19:13:15,412 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 19:13:15,472 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:13:15,473 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:13:17,889 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:13:17,896 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:13:17,896 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 19:13:17,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:13:17 BoogieIcfgContainer [2021-12-06 19:13:17,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:13:17,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:13:17,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:13:17,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:13:17,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:13:15" (1/3) ... [2021-12-06 19:13:17,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43d74cd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:13:17, skipping insertion in model container [2021-12-06 19:13:17,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:15" (2/3) ... [2021-12-06 19:13:17,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43d74cd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:13:17, skipping insertion in model container [2021-12-06 19:13:17,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:13:17" (3/3) ... [2021-12-06 19:13:17,905 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_1-3a.c.cil.c [2021-12-06 19:13:17,910 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:13:17,911 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 19:13:17,946 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:13:17,951 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 19:13:17,951 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 19:13:17,964 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 67 states have (on average 1.5820895522388059) internal successors, (106), 71 states have internal predecessors, (106), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 19:13:17,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 19:13:17,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:17,967 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:17,968 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:17,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:17,973 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-12-06 19:13:17,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:13:17,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706606057] [2021-12-06 19:13:17,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:17,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:13:17,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:13:17,985 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:13:17,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 19:13:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:18,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 19:13:18,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:18,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:13:18,464 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:13:18,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706606057] [2021-12-06 19:13:18,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706606057] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:18,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:18,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:13:18,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134090540] [2021-12-06 19:13:18,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:18,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 19:13:18,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:13:18,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 19:13:18,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:13:18,490 INFO L87 Difference]: Start difference. First operand has 81 states, 67 states have (on average 1.5820895522388059) internal successors, (106), 71 states have internal predecessors, (106), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:18,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:18,511 INFO L93 Difference]: Finished difference Result 157 states and 249 transitions. [2021-12-06 19:13:18,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 19:13:18,512 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 19:13:18,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:18,518 INFO L225 Difference]: With dead ends: 157 [2021-12-06 19:13:18,518 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 19:13:18,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:13:18,523 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:18,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:13:18,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 19:13:18,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-06 19:13:18,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 64 states have internal predecessors, (91), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 19:13:18,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 108 transitions. [2021-12-06 19:13:18,553 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 108 transitions. Word has length 7 [2021-12-06 19:13:18,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:18,553 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 108 transitions. [2021-12-06 19:13:18,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:18,553 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 108 transitions. [2021-12-06 19:13:18,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 19:13:18,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:18,554 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:18,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:13:18,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:13:18,756 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:18,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:18,759 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-12-06 19:13:18,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:13:18,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423200285] [2021-12-06 19:13:18,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:18,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:13:18,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:13:18,765 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:13:18,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 19:13:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:31,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 19:13:31,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:45,514 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= |c_ULTIMATE.start_main1_~result~0#1| (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-12-06 19:14:34,996 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from false [2021-12-06 19:14:37,042 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from true [2021-12-06 19:14:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:14:37,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:14:37,043 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:14:37,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423200285] [2021-12-06 19:14:37,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423200285] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:14:37,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:14:37,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:14:37,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997364669] [2021-12-06 19:14:37,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:14:37,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:14:37,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:14:37,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:14:37,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2021-12-06 19:14:37,047 INFO L87 Difference]: Start difference. First operand 74 states and 108 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:14:39,395 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 19:14:39,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:14:39,647 INFO L93 Difference]: Finished difference Result 74 states and 108 transitions. [2021-12-06 19:14:39,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:14:39,648 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 19:14:39,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:14:39,649 INFO L225 Difference]: With dead ends: 74 [2021-12-06 19:14:39,649 INFO L226 Difference]: Without dead ends: 69 [2021-12-06 19:14:39,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=18, Invalid=17, Unknown=3, NotChecked=18, Total=56 [2021-12-06 19:14:39,651 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 104 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:14:39,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 273 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 1 Unknown, 211 Unchecked, 2.5s Time] [2021-12-06 19:14:39,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-06 19:14:39,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-12-06 19:14:39,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 59 states have internal predecessors, (86), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 19:14:39,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 103 transitions. [2021-12-06 19:14:39,661 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 103 transitions. Word has length 7 [2021-12-06 19:14:39,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:14:39,661 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 103 transitions. [2021-12-06 19:14:39,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:14:39,662 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 103 transitions. [2021-12-06 19:14:39,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 19:14:39,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:14:39,663 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:14:39,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 19:14:39,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:14:39,865 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:14:39,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:14:39,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1413922597, now seen corresponding path program 1 times [2021-12-06 19:14:39,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:14:39,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944413658] [2021-12-06 19:14:39,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:14:39,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:14:39,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:14:39,873 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:14:39,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 19:14:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:14:39,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:14:39,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:14:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:14:40,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:14:40,391 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:14:40,392 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:14:40,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944413658] [2021-12-06 19:14:40,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944413658] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:14:40,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:14:40,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-06 19:14:40,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954068481] [2021-12-06 19:14:40,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:14:40,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:14:40,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:14:40,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:14:40,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:14:40,394 INFO L87 Difference]: Start difference. First operand 69 states and 103 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 19:14:40,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:14:40,613 INFO L93 Difference]: Finished difference Result 162 states and 253 transitions. [2021-12-06 19:14:40,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:14:40,614 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2021-12-06 19:14:40,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:14:40,617 INFO L225 Difference]: With dead ends: 162 [2021-12-06 19:14:40,617 INFO L226 Difference]: Without dead ends: 118 [2021-12-06 19:14:40,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:14:40,619 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 57 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:14:40,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 712 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:14:40,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-06 19:14:40,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2021-12-06 19:14:40,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 68 states have internal predecessors, (96), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2021-12-06 19:14:40,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 122 transitions. [2021-12-06 19:14:40,633 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 122 transitions. Word has length 33 [2021-12-06 19:14:40,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:14:40,634 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 122 transitions. [2021-12-06 19:14:40,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 19:14:40,634 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 122 transitions. [2021-12-06 19:14:40,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 19:14:40,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:14:40,636 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:14:40,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 19:14:40,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:14:40,838 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:14:40,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:14:40,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1578065669, now seen corresponding path program 1 times [2021-12-06 19:14:40,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:14:40,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87882218] [2021-12-06 19:14:40,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:14:40,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:14:40,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:14:40,846 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:14:40,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 19:14:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:14:40,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:14:40,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:14:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:14:41,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:14:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:14:41,374 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:14:41,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87882218] [2021-12-06 19:14:41,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87882218] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:14:41,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:14:41,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-06 19:14:41,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908404976] [2021-12-06 19:14:41,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:14:41,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:14:41,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:14:41,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:14:41,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:14:41,376 INFO L87 Difference]: Start difference. First operand 81 states and 122 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 19:14:41,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:14:41,718 INFO L93 Difference]: Finished difference Result 179 states and 276 transitions. [2021-12-06 19:14:41,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:14:41,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-12-06 19:14:41,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:14:41,720 INFO L225 Difference]: With dead ends: 179 [2021-12-06 19:14:41,721 INFO L226 Difference]: Without dead ends: 132 [2021-12-06 19:14:41,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:14:41,722 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 55 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:14:41,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 469 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:14:41,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-06 19:14:41,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2021-12-06 19:14:41,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 102 states have (on average 1.4313725490196079) internal successors, (146), 103 states have internal predecessors, (146), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (24), 20 states have call predecessors, (24), 17 states have call successors, (24) [2021-12-06 19:14:41,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 188 transitions. [2021-12-06 19:14:41,741 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 188 transitions. Word has length 37 [2021-12-06 19:14:41,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:14:41,742 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 188 transitions. [2021-12-06 19:14:41,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 19:14:41,742 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 188 transitions. [2021-12-06 19:14:41,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 19:14:41,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:14:41,744 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:14:41,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 19:14:41,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:14:41,946 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:14:41,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:14:41,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1319900231, now seen corresponding path program 1 times [2021-12-06 19:14:41,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:14:41,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957583462] [2021-12-06 19:14:41,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:14:41,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:14:41,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:14:41,953 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:14:41,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 19:14:42,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:14:42,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:14:42,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:14:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:14:42,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:14:42,228 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:14:42,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957583462] [2021-12-06 19:14:42,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957583462] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:14:42,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:14:42,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:14:42,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55088953] [2021-12-06 19:14:42,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:14:42,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:14:42,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:14:42,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:14:42,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:14:42,230 INFO L87 Difference]: Start difference. First operand 124 states and 188 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:14:42,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:14:42,537 INFO L93 Difference]: Finished difference Result 280 states and 429 transitions. [2021-12-06 19:14:42,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:14:42,538 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2021-12-06 19:14:42,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:14:42,541 INFO L225 Difference]: With dead ends: 280 [2021-12-06 19:14:42,541 INFO L226 Difference]: Without dead ends: 210 [2021-12-06 19:14:42,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:14:42,544 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 52 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:14:42,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 465 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:14:42,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-06 19:14:42,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 206. [2021-12-06 19:14:42,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 174 states have (on average 1.4252873563218391) internal successors, (248), 173 states have internal predecessors, (248), 28 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (34), 34 states have call predecessors, (34), 27 states have call successors, (34) [2021-12-06 19:14:42,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 310 transitions. [2021-12-06 19:14:42,571 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 310 transitions. Word has length 37 [2021-12-06 19:14:42,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:14:42,572 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 310 transitions. [2021-12-06 19:14:42,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:14:42,572 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 310 transitions. [2021-12-06 19:14:42,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 19:14:42,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:14:42,575 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:14:42,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-06 19:14:42,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:14:42,777 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:14:42,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:14:42,779 INFO L85 PathProgramCache]: Analyzing trace with hash -639841861, now seen corresponding path program 1 times [2021-12-06 19:14:42,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:14:42,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899664761] [2021-12-06 19:14:42,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:14:42,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:14:42,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:14:42,783 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:14:42,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 19:14:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:14:42,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 19:14:42,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:14:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:14:43,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:14:43,127 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:14:43,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899664761] [2021-12-06 19:14:43,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899664761] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:14:43,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:14:43,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:14:43,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708693073] [2021-12-06 19:14:43,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:14:43,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:14:43,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:14:43,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:14:43,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:14:43,129 INFO L87 Difference]: Start difference. First operand 206 states and 310 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:14:43,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:14:43,575 INFO L93 Difference]: Finished difference Result 294 states and 444 transitions. [2021-12-06 19:14:43,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:14:43,576 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2021-12-06 19:14:43,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:14:43,578 INFO L225 Difference]: With dead ends: 294 [2021-12-06 19:14:43,578 INFO L226 Difference]: Without dead ends: 230 [2021-12-06 19:14:43,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:14:43,580 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 105 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:14:43,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 548 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:14:43,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-06 19:14:43,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2021-12-06 19:14:43,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 162 states have (on average 1.3950617283950617) internal successors, (226), 161 states have internal predecessors, (226), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (28), 28 states have call predecessors, (28), 21 states have call successors, (28) [2021-12-06 19:14:43,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 276 transitions. [2021-12-06 19:14:43,594 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 276 transitions. Word has length 37 [2021-12-06 19:14:43,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:14:43,594 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 276 transitions. [2021-12-06 19:14:43,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:14:43,594 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 276 transitions. [2021-12-06 19:14:43,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 19:14:43,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:14:43,596 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:14:43,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 19:14:43,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:14:43,798 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:14:43,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:14:43,800 INFO L85 PathProgramCache]: Analyzing trace with hash 321822244, now seen corresponding path program 1 times [2021-12-06 19:14:43,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:14:43,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1489612901] [2021-12-06 19:14:43,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:14:43,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:14:43,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:14:43,805 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:14:43,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 19:14:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:14:43,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 19:14:43,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:14:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:14:44,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:14:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:14:44,509 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:14:44,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1489612901] [2021-12-06 19:14:44,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1489612901] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:14:44,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:14:44,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-12-06 19:14:44,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178964726] [2021-12-06 19:14:44,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:14:44,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:14:44,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:14:44,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:14:44,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:14:44,511 INFO L87 Difference]: Start difference. First operand 188 states and 276 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 19:14:45,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:14:45,161 INFO L93 Difference]: Finished difference Result 276 states and 412 transitions. [2021-12-06 19:14:45,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:14:45,162 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2021-12-06 19:14:45,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:14:45,164 INFO L225 Difference]: With dead ends: 276 [2021-12-06 19:14:45,164 INFO L226 Difference]: Without dead ends: 238 [2021-12-06 19:14:45,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:14:45,165 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 195 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:14:45,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 656 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:14:45,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-06 19:14:45,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 179. [2021-12-06 19:14:45,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 156 states have (on average 1.3846153846153846) internal successors, (216), 155 states have internal predecessors, (216), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (25), 25 states have call predecessors, (25), 18 states have call successors, (25) [2021-12-06 19:14:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 260 transitions. [2021-12-06 19:14:45,177 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 260 transitions. Word has length 41 [2021-12-06 19:14:45,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:14:45,177 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 260 transitions. [2021-12-06 19:14:45,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 19:14:45,178 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 260 transitions. [2021-12-06 19:14:45,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 19:14:45,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:14:45,179 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:14:45,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-06 19:14:45,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:14:45,381 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:14:45,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:14:45,382 INFO L85 PathProgramCache]: Analyzing trace with hash 64679693, now seen corresponding path program 1 times [2021-12-06 19:14:45,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:14:45,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104210692] [2021-12-06 19:14:45,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:14:45,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:14:45,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:14:45,386 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:14:45,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 19:14:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:14:45,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:14:45,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:14:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:14:45,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:14:45,595 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:14:45,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104210692] [2021-12-06 19:14:45,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104210692] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:14:45,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:14:45,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:14:45,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251343362] [2021-12-06 19:14:45,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:14:45,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:14:45,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:14:45,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:14:45,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:14:45,597 INFO L87 Difference]: Start difference. First operand 179 states and 260 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:14:45,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:14:45,701 INFO L93 Difference]: Finished difference Result 332 states and 490 transitions. [2021-12-06 19:14:45,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:14:45,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-12-06 19:14:45,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:14:45,704 INFO L225 Difference]: With dead ends: 332 [2021-12-06 19:14:45,705 INFO L226 Difference]: Without dead ends: 266 [2021-12-06 19:14:45,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:14:45,706 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 66 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:14:45,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 336 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:14:45,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-06 19:14:45,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 234. [2021-12-06 19:14:45,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 208 states have (on average 1.3461538461538463) internal successors, (280), 207 states have internal predecessors, (280), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (28), 28 states have call predecessors, (28), 21 states have call successors, (28) [2021-12-06 19:14:45,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 330 transitions. [2021-12-06 19:14:45,727 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 330 transitions. Word has length 44 [2021-12-06 19:14:45,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:14:45,728 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 330 transitions. [2021-12-06 19:14:45,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:14:45,728 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 330 transitions. [2021-12-06 19:14:45,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 19:14:45,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:14:45,730 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:14:45,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-06 19:14:45,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:14:45,930 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:14:45,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:14:45,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1143994910, now seen corresponding path program 1 times [2021-12-06 19:14:45,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:14:45,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743518858] [2021-12-06 19:14:45,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:14:45,932 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:14:45,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:14:45,932 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:14:45,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 19:14:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:14:45,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:14:45,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:14:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 19:14:46,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:14:46,176 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:14:46,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743518858] [2021-12-06 19:14:46,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743518858] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:14:46,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:14:46,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:14:46,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285695721] [2021-12-06 19:14:46,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:14:46,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:14:46,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:14:46,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:14:46,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:14:46,178 INFO L87 Difference]: Start difference. First operand 234 states and 330 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 19:14:46,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:14:46,376 INFO L93 Difference]: Finished difference Result 409 states and 574 transitions. [2021-12-06 19:14:46,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:14:46,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2021-12-06 19:14:46,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:14:46,380 INFO L225 Difference]: With dead ends: 409 [2021-12-06 19:14:46,380 INFO L226 Difference]: Without dead ends: 179 [2021-12-06 19:14:46,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:14:46,381 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 25 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:14:46,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 253 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:14:46,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-06 19:14:46,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 167. [2021-12-06 19:14:46,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 147 states have (on average 1.3061224489795917) internal successors, (192), 149 states have internal predecessors, (192), 15 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (20), 17 states have call predecessors, (20), 14 states have call successors, (20) [2021-12-06 19:14:46,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 227 transitions. [2021-12-06 19:14:46,394 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 227 transitions. Word has length 44 [2021-12-06 19:14:46,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:14:46,395 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 227 transitions. [2021-12-06 19:14:46,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 19:14:46,395 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 227 transitions. [2021-12-06 19:14:46,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 19:14:46,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:14:46,396 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:14:46,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-06 19:14:46,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:14:46,598 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:14:46,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:14:46,599 INFO L85 PathProgramCache]: Analyzing trace with hash -610339590, now seen corresponding path program 1 times [2021-12-06 19:14:46,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:14:46,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028702265] [2021-12-06 19:14:46,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:14:46,601 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:14:46,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:14:46,604 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:14:46,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 19:14:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:14:46,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 19:14:46,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:14:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:14:47,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:14:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:14:47,748 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:14:47,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028702265] [2021-12-06 19:14:47,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028702265] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 19:14:47,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:14:47,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-12-06 19:14:47,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27140058] [2021-12-06 19:14:47,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:14:47,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:14:47,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:14:47,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:14:47,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:14:47,750 INFO L87 Difference]: Start difference. First operand 167 states and 227 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:14:48,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:14:48,925 INFO L93 Difference]: Finished difference Result 317 states and 460 transitions. [2021-12-06 19:14:48,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:14:48,926 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-12-06 19:14:48,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:14:48,929 INFO L225 Difference]: With dead ends: 317 [2021-12-06 19:14:48,929 INFO L226 Difference]: Without dead ends: 281 [2021-12-06 19:14:48,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-12-06 19:14:48,930 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 188 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:14:48,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 501 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 19:14:48,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-12-06 19:14:48,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 205. [2021-12-06 19:14:48,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 179 states have (on average 1.3016759776536313) internal successors, (233), 182 states have internal predecessors, (233), 21 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (26), 23 states have call predecessors, (26), 20 states have call successors, (26) [2021-12-06 19:14:48,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 280 transitions. [2021-12-06 19:14:48,946 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 280 transitions. Word has length 45 [2021-12-06 19:14:48,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:14:48,946 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 280 transitions. [2021-12-06 19:14:48,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:14:48,946 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 280 transitions. [2021-12-06 19:14:48,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 19:14:48,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:14:48,947 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:14:48,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-06 19:14:49,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:14:49,149 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:14:49,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:14:49,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1164667772, now seen corresponding path program 1 times [2021-12-06 19:14:49,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:14:49,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469039421] [2021-12-06 19:14:49,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:14:49,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:14:49,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:14:49,155 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:14:49,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 19:14:49,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:14:49,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:14:49,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:14:49,381 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:14:49,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:14:49,382 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:14:49,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469039421] [2021-12-06 19:14:49,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469039421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:14:49,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:14:49,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:14:49,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104895295] [2021-12-06 19:14:49,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:14:49,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:14:49,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:14:49,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:14:49,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:14:49,384 INFO L87 Difference]: Start difference. First operand 205 states and 280 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:14:49,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:14:49,485 INFO L93 Difference]: Finished difference Result 212 states and 286 transitions. [2021-12-06 19:14:49,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:14:49,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-12-06 19:14:49,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:14:49,488 INFO L225 Difference]: With dead ends: 212 [2021-12-06 19:14:49,488 INFO L226 Difference]: Without dead ends: 205 [2021-12-06 19:14:49,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:14:49,489 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 5 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:14:49,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 386 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:14:49,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-06 19:14:49,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2021-12-06 19:14:49,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 179 states have (on average 1.2849162011173185) internal successors, (230), 182 states have internal predecessors, (230), 21 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (26), 23 states have call predecessors, (26), 20 states have call successors, (26) [2021-12-06 19:14:49,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 277 transitions. [2021-12-06 19:14:49,506 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 277 transitions. Word has length 45 [2021-12-06 19:14:49,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:14:49,506 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 277 transitions. [2021-12-06 19:14:49,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:14:49,506 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 277 transitions. [2021-12-06 19:14:49,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 19:14:49,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:14:49,507 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:14:49,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-06 19:14:49,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:14:49,708 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:14:49,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:14:49,710 INFO L85 PathProgramCache]: Analyzing trace with hash -617643621, now seen corresponding path program 1 times [2021-12-06 19:14:49,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:14:49,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395368619] [2021-12-06 19:14:49,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:14:49,711 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:14:49,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:14:49,714 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:14:49,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 19:14:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:14:49,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 19:14:49,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:14:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 19:14:50,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:14:50,122 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:14:50,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395368619] [2021-12-06 19:14:50,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395368619] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:14:50,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:14:50,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:14:50,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480563599] [2021-12-06 19:14:50,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:14:50,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:14:50,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:14:50,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:14:50,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:14:50,124 INFO L87 Difference]: Start difference. First operand 205 states and 277 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:14:50,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:14:50,348 INFO L93 Difference]: Finished difference Result 248 states and 338 transitions. [2021-12-06 19:14:50,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:14:50,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-12-06 19:14:50,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:14:50,351 INFO L225 Difference]: With dead ends: 248 [2021-12-06 19:14:50,351 INFO L226 Difference]: Without dead ends: 246 [2021-12-06 19:14:50,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:14:50,352 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 38 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:14:50,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 601 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 10 Unchecked, 0.1s Time] [2021-12-06 19:14:50,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-06 19:14:50,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 209. [2021-12-06 19:14:50,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 182 states have (on average 1.2802197802197801) internal successors, (233), 185 states have internal predecessors, (233), 21 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (26), 23 states have call predecessors, (26), 20 states have call successors, (26) [2021-12-06 19:14:50,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 280 transitions. [2021-12-06 19:14:50,368 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 280 transitions. Word has length 45 [2021-12-06 19:14:50,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:14:50,369 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 280 transitions. [2021-12-06 19:14:50,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:14:50,369 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 280 transitions. [2021-12-06 19:14:50,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 19:14:50,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:14:50,370 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:14:50,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-06 19:14:50,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:14:50,571 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:14:50,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:14:50,573 INFO L85 PathProgramCache]: Analyzing trace with hash -560385319, now seen corresponding path program 1 times [2021-12-06 19:14:50,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:14:50,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440509678] [2021-12-06 19:14:50,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:14:50,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:14:50,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:14:50,577 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:14:50,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-06 19:14:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:14:50,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 19:14:50,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:14:50,998 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 19:14:50,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:14:50,998 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:14:50,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440509678] [2021-12-06 19:14:50,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440509678] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:14:50,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:14:50,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:14:50,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053689269] [2021-12-06 19:14:50,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:14:50,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:14:50,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:14:51,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:14:51,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:14:51,000 INFO L87 Difference]: Start difference. First operand 209 states and 280 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:14:51,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:14:51,205 INFO L93 Difference]: Finished difference Result 262 states and 354 transitions. [2021-12-06 19:14:51,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:14:51,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-12-06 19:14:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:14:51,209 INFO L225 Difference]: With dead ends: 262 [2021-12-06 19:14:51,209 INFO L226 Difference]: Without dead ends: 260 [2021-12-06 19:14:51,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:14:51,210 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 38 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:14:51,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 472 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2021-12-06 19:14:51,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-06 19:14:51,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 213. [2021-12-06 19:14:51,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 185 states have (on average 1.2756756756756757) internal successors, (236), 188 states have internal predecessors, (236), 21 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (26), 23 states have call predecessors, (26), 20 states have call successors, (26) [2021-12-06 19:14:51,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 283 transitions. [2021-12-06 19:14:51,226 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 283 transitions. Word has length 45 [2021-12-06 19:14:51,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:14:51,226 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 283 transitions. [2021-12-06 19:14:51,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:14:51,226 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 283 transitions. [2021-12-06 19:14:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 19:14:51,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:14:51,227 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:14:51,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-06 19:14:51,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:14:51,428 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:14:51,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:14:51,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1322710928, now seen corresponding path program 1 times [2021-12-06 19:14:51,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:14:51,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855191250] [2021-12-06 19:14:51,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:14:51,429 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:14:51,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:14:51,429 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:14:51,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 19:14:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:14:51,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:14:51,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:14:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:14:51,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:14:51,614 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:14:51,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855191250] [2021-12-06 19:14:51,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855191250] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:14:51,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:14:51,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:14:51,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960371435] [2021-12-06 19:14:51,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:14:51,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:14:51,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:14:51,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:14:51,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:14:51,616 INFO L87 Difference]: Start difference. First operand 213 states and 283 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:14:51,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:14:51,702 INFO L93 Difference]: Finished difference Result 352 states and 482 transitions. [2021-12-06 19:14:51,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:14:51,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2021-12-06 19:14:51,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:14:51,706 INFO L225 Difference]: With dead ends: 352 [2021-12-06 19:14:51,706 INFO L226 Difference]: Without dead ends: 300 [2021-12-06 19:14:51,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:14:51,707 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 75 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:14:51,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 321 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:14:51,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-06 19:14:51,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 232. [2021-12-06 19:14:51,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 201 states have (on average 1.2835820895522387) internal successors, (258), 203 states have internal predecessors, (258), 24 states have call successors, (24), 4 states have call predecessors, (24), 6 states have return successors, (29), 26 states have call predecessors, (29), 23 states have call successors, (29) [2021-12-06 19:14:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 311 transitions. [2021-12-06 19:14:51,729 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 311 transitions. Word has length 46 [2021-12-06 19:14:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:14:51,730 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 311 transitions. [2021-12-06 19:14:51,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:14:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 311 transitions. [2021-12-06 19:14:51,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 19:14:51,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:14:51,732 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:14:51,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-06 19:14:51,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:14:51,932 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:14:51,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:14:51,933 INFO L85 PathProgramCache]: Analyzing trace with hash -514674649, now seen corresponding path program 1 times [2021-12-06 19:14:51,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:14:51,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [12620428] [2021-12-06 19:14:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:14:51,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:14:51,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:14:51,934 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:14:51,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-06 19:14:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:14:51,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:14:51,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:14:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:14:52,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:14:52,061 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:14:52,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [12620428] [2021-12-06 19:14:52,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [12620428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:14:52,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:14:52,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:14:52,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835312468] [2021-12-06 19:14:52,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:14:52,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:14:52,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:14:52,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:14:52,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:14:52,063 INFO L87 Difference]: Start difference. First operand 232 states and 311 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:14:52,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:14:52,125 INFO L93 Difference]: Finished difference Result 247 states and 327 transitions. [2021-12-06 19:14:52,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:14:52,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2021-12-06 19:14:52,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:14:52,127 INFO L225 Difference]: With dead ends: 247 [2021-12-06 19:14:52,128 INFO L226 Difference]: Without dead ends: 208 [2021-12-06 19:14:52,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:14:52,129 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 1 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:14:52,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 288 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:14:52,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-06 19:14:52,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2021-12-06 19:14:52,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 177 states have (on average 1.2994350282485876) internal successors, (230), 180 states have internal predecessors, (230), 24 states have call successors, (24), 4 states have call predecessors, (24), 6 states have return successors, (27), 25 states have call predecessors, (27), 23 states have call successors, (27) [2021-12-06 19:14:52,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 281 transitions. [2021-12-06 19:14:52,147 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 281 transitions. Word has length 49 [2021-12-06 19:14:52,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:14:52,147 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 281 transitions. [2021-12-06 19:14:52,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:14:52,148 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 281 transitions. [2021-12-06 19:14:52,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 19:14:52,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:14:52,149 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:14:52,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-06 19:14:52,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:14:52,350 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:14:52,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:14:52,352 INFO L85 PathProgramCache]: Analyzing trace with hash -627639643, now seen corresponding path program 1 times [2021-12-06 19:14:52,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:14:52,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211423287] [2021-12-06 19:14:52,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:14:52,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:14:52,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:14:52,356 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:14:52,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-06 19:14:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:14:52,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 19:14:52,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:14:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 19:14:52,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:14:52,611 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:14:52,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211423287] [2021-12-06 19:14:52,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211423287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:14:52,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:14:52,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:14:52,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255266906] [2021-12-06 19:14:52,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:14:52,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:14:52,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:14:52,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:14:52,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:14:52,613 INFO L87 Difference]: Start difference. First operand 208 states and 281 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:14:52,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:14:52,930 INFO L93 Difference]: Finished difference Result 335 states and 452 transitions. [2021-12-06 19:14:52,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:14:52,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-12-06 19:14:52,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:14:52,933 INFO L225 Difference]: With dead ends: 335 [2021-12-06 19:14:52,933 INFO L226 Difference]: Without dead ends: 293 [2021-12-06 19:14:52,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:14:52,934 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 200 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:14:52,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 421 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:14:52,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-12-06 19:14:52,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 208. [2021-12-06 19:14:52,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 177 states have (on average 1.2881355932203389) internal successors, (228), 180 states have internal predecessors, (228), 24 states have call successors, (24), 4 states have call predecessors, (24), 6 states have return successors, (27), 25 states have call predecessors, (27), 23 states have call successors, (27) [2021-12-06 19:14:52,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 279 transitions. [2021-12-06 19:14:52,956 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 279 transitions. Word has length 50 [2021-12-06 19:14:52,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:14:52,956 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 279 transitions. [2021-12-06 19:14:52,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:14:52,956 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 279 transitions. [2021-12-06 19:14:52,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 19:14:52,958 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:14:52,958 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:14:52,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-06 19:14:53,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:14:53,159 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:14:53,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:14:53,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1892770879, now seen corresponding path program 1 times [2021-12-06 19:14:53,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:14:53,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333065140] [2021-12-06 19:14:53,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:14:53,163 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:14:53,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:14:53,165 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:14:53,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-06 19:14:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 19:14:53,255 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 19:14:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 19:14:53,307 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-12-06 19:14:53,307 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-06 19:14:53,308 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-06 19:14:53,309 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-06 19:14:53,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-06 19:14:53,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:14:53,519 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:14:53,528 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 19:14:53,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 07:14:53 BoogieIcfgContainer [2021-12-06 19:14:53,581 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 19:14:53,582 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 19:14:53,582 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 19:14:53,582 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 19:14:53,582 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:13:17" (3/4) ... [2021-12-06 19:14:53,584 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-06 19:14:53,626 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 19:14:53,627 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 19:14:53,627 INFO L158 Benchmark]: Toolchain (without parser) took 98570.65ms. Allocated memory was 58.7MB in the beginning and 86.0MB in the end (delta: 27.3MB). Free memory was 36.9MB in the beginning and 57.1MB in the end (delta: -20.2MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2021-12-06 19:14:53,628 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 58.7MB. Free memory is still 39.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:14:53,628 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.42ms. Allocated memory was 58.7MB in the beginning and 86.0MB in the end (delta: 27.3MB). Free memory was 36.8MB in the beginning and 64.9MB in the end (delta: -28.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-06 19:14:53,628 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.51ms. Allocated memory is still 86.0MB. Free memory was 64.9MB in the beginning and 62.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 19:14:53,629 INFO L158 Benchmark]: Boogie Preprocessor took 26.88ms. Allocated memory is still 86.0MB. Free memory was 62.8MB in the beginning and 61.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 19:14:53,629 INFO L158 Benchmark]: RCFGBuilder took 2539.98ms. Allocated memory is still 86.0MB. Free memory was 61.0MB in the beginning and 66.6MB in the end (delta: -5.5MB). Peak memory consumption was 19.1MB. Max. memory is 16.1GB. [2021-12-06 19:14:53,629 INFO L158 Benchmark]: TraceAbstraction took 95682.18ms. Allocated memory is still 86.0MB. Free memory was 66.1MB in the beginning and 61.3MB in the end (delta: 4.8MB). Peak memory consumption was 40.0MB. Max. memory is 16.1GB. [2021-12-06 19:14:53,630 INFO L158 Benchmark]: Witness Printer took 44.95ms. Allocated memory is still 86.0MB. Free memory was 61.3MB in the beginning and 57.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-06 19:14:53,631 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 58.7MB. Free memory is still 39.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 238.42ms. Allocated memory was 58.7MB in the beginning and 86.0MB in the end (delta: 27.3MB). Free memory was 36.8MB in the beginning and 64.9MB in the end (delta: -28.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.51ms. Allocated memory is still 86.0MB. Free memory was 64.9MB in the beginning and 62.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.88ms. Allocated memory is still 86.0MB. Free memory was 62.8MB in the beginning and 61.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 2539.98ms. Allocated memory is still 86.0MB. Free memory was 61.0MB in the beginning and 66.6MB in the end (delta: -5.5MB). Peak memory consumption was 19.1MB. Max. memory is 16.1GB. * TraceAbstraction took 95682.18ms. Allocated memory is still 86.0MB. Free memory was 66.1MB in the beginning and 61.3MB in the end (delta: 4.8MB). Peak memory consumption was 40.0MB. Max. memory is 16.1GB. * Witness Printer took 44.95ms. Allocated memory is still 86.0MB. Free memory was 61.3MB in the beginning and 57.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 60]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L402] COND FALSE !(__VERIFIER_nondet_int()) [L405] CALL main2() [L269] unsigned int a ; [L270] unsigned int ma = __VERIFIER_nondet_uint(); [L271] signed char ea = __VERIFIER_nondet_char(); [L272] unsigned int b ; [L273] unsigned int mb = __VERIFIER_nondet_uint(); [L274] signed char eb = __VERIFIER_nondet_char(); [L275] unsigned int r_add ; [L276] unsigned int zero ; [L277] int sa ; [L278] int sb ; [L279] int tmp ; [L280] int tmp___0 ; [L281] int tmp___1 ; [L282] int tmp___2 ; [L283] int tmp___3 ; [L284] int tmp___4 ; [L285] int tmp___5 ; [L286] int tmp___6 ; [L287] int tmp___7 ; [L288] int tmp___8 ; [L289] int tmp___9 ; [L290] int __retres23 ; [L294] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L68] unsigned int res ; [L69] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L72] COND TRUE ! m [L73] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L123] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, __retres4=0, e=0, m=0] [L294] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0] [L294] zero = base2flt(0, 0) [L295] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=0, \old(m)=16777216] [L68] unsigned int res ; [L69] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L72] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L78] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L100] COND TRUE 1 VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L102] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L119] m = m & ~ (1U << 24U) [L120] res = m | ((unsigned int )(e + 128) << 24U) [L121] __retres4 = res VAL [\old(e)=0, \old(m)=16777216, __retres4=2147483648, e=0, m=0, res=2147483648] [L123] return (__retres4); VAL [\old(e)=0, \old(m)=16777216, \result=-2147483648, __retres4=2147483648, e=0, m=0, res=2147483648] [L295] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=-2147483648, ea=0, ma=16777216, zero=0] [L295] a = base2flt(ma, ea) [L296] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=64, \old(m)=16777216] [L68] unsigned int res ; [L69] unsigned int __retres4 ; VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L72] COND FALSE !(! m) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L78] COND FALSE !(m < 1U << 24U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L100] COND TRUE 1 VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L102] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L119] m = m & ~ (1U << 24U) [L120] res = m | ((unsigned int )(e + 128) << 24U) [L121] __retres4 = res VAL [\old(e)=64, \old(m)=16777216, __retres4=3221225472, e=64, m=0, res=3221225472] [L123] return (__retres4); VAL [\old(e)=64, \old(m)=16777216, \result=-1073741824, __retres4=3221225472, e=64, m=0, res=3221225472] [L296] RET, EXPR base2flt(mb, eb) VAL [a=2147483648, base2flt(mb, eb)=-1073741824, ea=0, eb=64, ma=16777216, mb=16777216, zero=0] [L296] b = base2flt(mb, eb) [L298] COND FALSE !(a < zero) VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, zero=0] [L301] COND TRUE a > zero [L302] tmp = 1 VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, tmp=1, zero=0] [L306] sa = tmp VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, tmp=1, zero=0] [L308] COND FALSE !(b < zero) VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, tmp=1, zero=0] [L311] COND TRUE b > zero [L312] tmp___0 = 1 VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, tmp=1, tmp___0=1, zero=0] [L316] sb = tmp___0 VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, sb=1, tmp=1, tmp___0=1, zero=0] [L319] CALL addflt(a, b) [L127] unsigned int res ; [L128] unsigned int ma ; [L129] unsigned int mb ; [L130] unsigned int delta ; [L131] int ea ; [L132] int eb ; [L133] unsigned int tmp ; [L134] unsigned int __retres10 ; VAL [\old(a)=2147483648, \old(b)=3221225472, a=2147483648, b=3221225472] [L137] COND TRUE a < b [L138] tmp = a [L139] a = b [L140] b = tmp VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, tmp=2147483648] [L144] COND FALSE !(! b) [L151] ma = a & ((1U << 24U) - 1U) [L152] ea = (int )(a >> 24U) - 128 [L153] ma = ma | (1U << 24U) [L154] mb = b & ((1U << 24U) - 1U) [L155] eb = (int )(b >> 24U) - 128 [L156] mb = mb | (1U << 24U) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L157] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=1] [L59] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L157] RET __VERIFIER_assert(ea >= eb) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L158] delta = ea - eb VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, delta=64, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L159] CALL __VERIFIER_assert(delta < sizeof(mb) * 8) VAL [\old(cond)=0] [L59] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L60] reach_error() VAL [\old(cond)=0, cond=0] - UnprovableResult [Line: 48]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 81 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 95.6s, OverallIterations: 17, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 7.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 1237 SdHoareTripleChecker+Valid, 5.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1204 mSDsluCounter, 6819 SdHoareTripleChecker+Invalid, 5.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 230 IncrementalHoareTripleChecker+Unchecked, 5060 mSDsCounter, 97 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 814 IncrementalHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 97 mSolverCounterUnsat, 1759 mSDtfsCounter, 814 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 775 GetRequests, 686 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 9.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=234occurred in iteration=8, InterpolantAutomatonStates: 98, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 507 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 13.2s SatisfiabilityAnalysisTime, 70.5s InterpolantComputationTime, 663 NumberOfCodeBlocks, 663 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 748 ConstructedInterpolants, 4 QuantifiedInterpolants, 1394 SizeOfPredicates, 49 NumberOfNonLiveVariables, 1194 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 20 InterpolantComputations, 13 PerfectInterpolantSequences, 255/282 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-06 19:14:53,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4601c346-d559-4ece-93ae-2aca09d40c57/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE