./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-esbmc-regression/Float_div.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Float_div.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fe4b2ac8b2a0e269dd16c91161494638306526c517de7ea644739142e1210da9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:14:47,506 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:14:47,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:14:47,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:14:47,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:14:47,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:14:47,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:14:47,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:14:47,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:14:47,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:14:47,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:14:47,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:14:47,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:14:47,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:14:47,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:14:47,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:14:47,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:14:47,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:14:47,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:14:47,585 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:14:47,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:14:47,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:14:47,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:14:47,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:14:47,599 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:14:47,599 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:14:47,600 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:14:47,602 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:14:47,603 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:14:47,604 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:14:47,605 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:14:47,606 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:14:47,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:14:47,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:14:47,610 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:14:47,611 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:14:47,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:14:47,612 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:14:47,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:14:47,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:14:47,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:14:47,616 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:14:47,650 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:14:47,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:14:47,651 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:14:47,651 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:14:47,652 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:14:47,652 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:14:47,652 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:14:47,653 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:14:47,653 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:14:47,653 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:14:47,653 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:14:47,654 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:14:47,654 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:14:47,654 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:14:47,655 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:14:47,655 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:14:47,655 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:14:47,655 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:14:47,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:14:47,657 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:14:47,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:14:47,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:14:47,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:14:47,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:14:47,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:14:47,658 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:14:47,659 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:14:47,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:14:47,659 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:14:47,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:14:47,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:14:47,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:14:47,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:14:47,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:14:47,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:14:47,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:14:47,662 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:14:47,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:14:47,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:14:47,663 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:14:47,663 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:14:47,663 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe4b2ac8b2a0e269dd16c91161494638306526c517de7ea644739142e1210da9 [2021-11-21 01:14:47,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:14:48,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:14:48,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:14:48,021 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:14:48,021 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:14:48,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/floats-esbmc-regression/Float_div.i [2021-11-21 01:14:48,123 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/data/ac2aeeff6/0dd7eae5452849cc9952b7cd925ee8b3/FLAG6cdce26cb [2021-11-21 01:14:48,684 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:14:48,685 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/sv-benchmarks/c/floats-esbmc-regression/Float_div.i [2021-11-21 01:14:48,701 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/data/ac2aeeff6/0dd7eae5452849cc9952b7cd925ee8b3/FLAG6cdce26cb [2021-11-21 01:14:49,027 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/data/ac2aeeff6/0dd7eae5452849cc9952b7cd925ee8b3 [2021-11-21 01:14:49,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:14:49,044 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:14:49,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:14:49,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:14:49,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:14:49,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:14:49" (1/1) ... [2021-11-21 01:14:49,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@654bd9f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:49, skipping insertion in model container [2021-11-21 01:14:49,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:14:49" (1/1) ... [2021-11-21 01:14:49,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:14:49,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:14:49,367 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_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/sv-benchmarks/c/floats-esbmc-regression/Float_div.i[803,816] [2021-11-21 01:14:49,385 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:14:49,401 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:14:49,415 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_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/sv-benchmarks/c/floats-esbmc-regression/Float_div.i[803,816] [2021-11-21 01:14:49,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:14:49,437 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:14:49,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:49 WrapperNode [2021-11-21 01:14:49,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:14:49,440 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:14:49,440 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:14:49,440 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:14:49,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:49" (1/1) ... [2021-11-21 01:14:49,460 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:49" (1/1) ... [2021-11-21 01:14:49,483 INFO L137 Inliner]: procedures = 14, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2021-11-21 01:14:49,483 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:14:49,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:14:49,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:14:49,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:14:49,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:49" (1/1) ... [2021-11-21 01:14:49,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:49" (1/1) ... [2021-11-21 01:14:49,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:49" (1/1) ... [2021-11-21 01:14:49,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:49" (1/1) ... [2021-11-21 01:14:49,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:49" (1/1) ... [2021-11-21 01:14:49,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:49" (1/1) ... [2021-11-21 01:14:49,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:49" (1/1) ... [2021-11-21 01:14:49,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:14:49,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:14:49,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:14:49,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:14:49,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:49" (1/1) ... [2021-11-21 01:14:49,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:14:49,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:14:49,574 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:14:49,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:14:49,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:14:49,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:14:49,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:14:49,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:14:49,694 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:14:49,696 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:14:49,806 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:14:49,825 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:14:49,825 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:14:49,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:14:49 BoogieIcfgContainer [2021-11-21 01:14:49,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:14:49,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:14:49,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:14:49,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:14:49,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:14:49" (1/3) ... [2021-11-21 01:14:49,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@95bba24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:14:49, skipping insertion in model container [2021-11-21 01:14:49,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:49" (2/3) ... [2021-11-21 01:14:49,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@95bba24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:14:49, skipping insertion in model container [2021-11-21 01:14:49,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:14:49" (3/3) ... [2021-11-21 01:14:49,839 INFO L111 eAbstractionObserver]: Analyzing ICFG Float_div.i [2021-11-21 01:14:49,845 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:14:49,845 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:14:49,906 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:14:49,916 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:14:49,916 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:14:49,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:49,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 01:14:49,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:49,940 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 01:14:49,940 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:49,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:49,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1880294, now seen corresponding path program 1 times [2021-11-21 01:14:49,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:49,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909524635] [2021-11-21 01:14:49,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:49,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:14:50,072 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 01:14:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:14:50,108 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-21 01:14:50,110 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 01:14:50,112 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 01:14:50,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:14:50,120 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-21 01:14:50,124 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 01:14:50,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:14:50 BoogieIcfgContainer [2021-11-21 01:14:50,146 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 01:14:50,147 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 01:14:50,148 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 01:14:50,148 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 01:14:50,149 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:14:49" (3/4) ... [2021-11-21 01:14:50,153 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-21 01:14:50,154 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 01:14:50,156 INFO L158 Benchmark]: Toolchain (without parser) took 1110.76ms. Allocated memory is still 102.8MB. Free memory was 68.2MB in the beginning and 53.6MB in the end (delta: 14.6MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. [2021-11-21 01:14:50,158 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 102.8MB. Free memory was 56.7MB in the beginning and 56.7MB in the end (delta: 41.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:14:50,159 INFO L158 Benchmark]: CACSL2BoogieTranslator took 390.84ms. Allocated memory is still 102.8MB. Free memory was 68.1MB in the beginning and 78.0MB in the end (delta: -9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 01:14:50,160 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.59ms. Allocated memory is still 102.8MB. Free memory was 78.0MB in the beginning and 76.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:14:50,161 INFO L158 Benchmark]: Boogie Preprocessor took 38.55ms. Allocated memory is still 102.8MB. Free memory was 76.6MB in the beginning and 75.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:14:50,170 INFO L158 Benchmark]: RCFGBuilder took 304.24ms. Allocated memory is still 102.8MB. Free memory was 75.6MB in the beginning and 66.8MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 01:14:50,171 INFO L158 Benchmark]: TraceAbstraction took 315.74ms. Allocated memory is still 102.8MB. Free memory was 66.1MB in the beginning and 54.3MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 01:14:50,172 INFO L158 Benchmark]: Witness Printer took 6.34ms. Allocated memory is still 102.8MB. Free memory is still 53.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:14:50,183 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 102.8MB. Free memory was 56.7MB in the beginning and 56.7MB in the end (delta: 41.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 390.84ms. Allocated memory is still 102.8MB. Free memory was 68.1MB in the beginning and 78.0MB in the end (delta: -9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.59ms. Allocated memory is still 102.8MB. Free memory was 78.0MB in the beginning and 76.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.55ms. Allocated memory is still 102.8MB. Free memory was 76.6MB in the beginning and 75.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 304.24ms. Allocated memory is still 102.8MB. Free memory was 75.6MB in the beginning and 66.8MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 315.74ms. Allocated memory is still 102.8MB. Free memory was 66.1MB in the beginning and 54.3MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Witness Printer took 6.34ms. Allocated memory is still 102.8MB. Free memory is still 53.9MB. 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: 13]: 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 23, overapproximation of someBinaryArithmeticFLOAToperation at line 21. Possible FailurePath: [L20] float x = 1.0f; [L21] float x1 = x/2.5f; VAL [x=1] [L23] COND FALSE !(x1 != x) [L29] CALL __VERIFIER_assert(x == 0) [L13] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L13] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 [2021-11-21 01:14:50,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/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_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Float_div.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fe4b2ac8b2a0e269dd16c91161494638306526c517de7ea644739142e1210da9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:14:53,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:14:53,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:14:53,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:14:53,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:14:53,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:14:53,296 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:14:53,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:14:53,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:14:53,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:14:53,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:14:53,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:14:53,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:14:53,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:14:53,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:14:53,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:14:53,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:14:53,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:14:53,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:14:53,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:14:53,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:14:53,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:14:53,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:14:53,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:14:53,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:14:53,365 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:14:53,365 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:14:53,367 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:14:53,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:14:53,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:14:53,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:14:53,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:14:53,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:14:53,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:14:53,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:14:53,378 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:14:53,387 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:14:53,388 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:14:53,388 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:14:53,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:14:53,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:14:53,398 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-21 01:14:53,449 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:14:53,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:14:53,451 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:14:53,451 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:14:53,452 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:14:53,452 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:14:53,453 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:14:53,453 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:14:53,453 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:14:53,453 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:14:53,455 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:14:53,455 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:14:53,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:14:53,457 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:14:53,457 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:14:53,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:14:53,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:14:53,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:14:53,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:14:53,459 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 01:14:53,459 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 01:14:53,459 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:14:53,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:14:53,460 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:14:53,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:14:53,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:14:53,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 01:14:53,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:14:53,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:14:53,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:14:53,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:14:53,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:14:53,463 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 01:14:53,463 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 01:14:53,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:14:53,463 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:14:53,464 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:14:53,464 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_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe4b2ac8b2a0e269dd16c91161494638306526c517de7ea644739142e1210da9 [2021-11-21 01:14:53,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:14:53,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:14:53,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:14:53,997 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:14:53,998 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:14:53,999 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/floats-esbmc-regression/Float_div.i [2021-11-21 01:14:54,088 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/data/f3dc6624a/561fae904a8640d2bea6ec2aee6dc5b1/FLAG46a2ee35b [2021-11-21 01:14:54,735 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:14:54,735 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/sv-benchmarks/c/floats-esbmc-regression/Float_div.i [2021-11-21 01:14:54,743 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/data/f3dc6624a/561fae904a8640d2bea6ec2aee6dc5b1/FLAG46a2ee35b [2021-11-21 01:14:55,081 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/data/f3dc6624a/561fae904a8640d2bea6ec2aee6dc5b1 [2021-11-21 01:14:55,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:14:55,088 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:14:55,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:14:55,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:14:55,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:14:55,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:14:55" (1/1) ... [2021-11-21 01:14:55,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@281b8347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55, skipping insertion in model container [2021-11-21 01:14:55,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:14:55" (1/1) ... [2021-11-21 01:14:55,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:14:55,131 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:14:55,305 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_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/sv-benchmarks/c/floats-esbmc-regression/Float_div.i[803,816] [2021-11-21 01:14:55,319 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:14:55,335 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:14:55,358 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_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/sv-benchmarks/c/floats-esbmc-regression/Float_div.i[803,816] [2021-11-21 01:14:55,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:14:55,394 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:14:55,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55 WrapperNode [2021-11-21 01:14:55,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:14:55,396 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:14:55,397 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:14:55,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:14:55,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55" (1/1) ... [2021-11-21 01:14:55,419 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55" (1/1) ... [2021-11-21 01:14:55,474 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2021-11-21 01:14:55,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:14:55,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:14:55,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:14:55,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:14:55,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55" (1/1) ... [2021-11-21 01:14:55,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55" (1/1) ... [2021-11-21 01:14:55,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55" (1/1) ... [2021-11-21 01:14:55,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55" (1/1) ... [2021-11-21 01:14:55,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55" (1/1) ... [2021-11-21 01:14:55,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55" (1/1) ... [2021-11-21 01:14:55,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55" (1/1) ... [2021-11-21 01:14:55,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:14:55,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:14:55,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:14:55,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:14:55,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55" (1/1) ... [2021-11-21 01:14:55,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:14:55,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:14:55,584 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:14:55,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:14:55,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:14:55,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 01:14:55,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:14:55,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:14:55,759 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:14:55,761 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:14:56,770 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:14:56,777 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:14:56,778 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:14:56,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:14:56 BoogieIcfgContainer [2021-11-21 01:14:56,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:14:56,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:14:56,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:14:56,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:14:56,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:14:55" (1/3) ... [2021-11-21 01:14:56,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d2ef71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:14:56, skipping insertion in model container [2021-11-21 01:14:56,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55" (2/3) ... [2021-11-21 01:14:56,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d2ef71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:14:56, skipping insertion in model container [2021-11-21 01:14:56,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:14:56" (3/3) ... [2021-11-21 01:14:56,791 INFO L111 eAbstractionObserver]: Analyzing ICFG Float_div.i [2021-11-21 01:14:56,798 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:14:56,799 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:14:56,859 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:14:56,869 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:14:56,869 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:14:56,886 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:56,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:14:56,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:56,893 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:14:56,894 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:56,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:56,902 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-11-21 01:14:56,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:14:56,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570940140] [2021-11-21 01:14:56,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:56,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:14:56,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:14:56,997 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:14:57,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 01:14:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:57,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:14:57,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:14:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:14:58,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:14:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:14:58,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:14:58,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570940140] [2021-11-21 01:14:58,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570940140] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:58,693 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:58,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-21 01:14:58,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69125963] [2021-11-21 01:14:58,696 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:58,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:14:58,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:14:58,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:14:58,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:14:58,741 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:15:01,716 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:01,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:01,752 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2021-11-21 01:15:01,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:15:01,755 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 01:15:01,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:01,765 INFO L225 Difference]: With dead ends: 21 [2021-11-21 01:15:01,766 INFO L226 Difference]: Without dead ends: 9 [2021-11-21 01:15:01,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:15:01,774 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:01,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 01:15:01,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-21 01:15:01,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-21 01:15:01,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:15:01,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-21 01:15:01,813 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2021-11-21 01:15:01,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:01,814 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-21 01:15:01,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:15:01,815 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-21 01:15:01,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:15:01,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:01,816 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-11-21 01:15:01,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:15:02,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:15:02,031 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:15:02,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:02,033 INFO L85 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 1 times [2021-11-21 01:15:02,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:15:02,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845408801] [2021-11-21 01:15:02,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:02,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:15:02,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:15:02,039 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:15:02,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 01:15:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:02,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:15:02,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:15:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:15:04,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:15:16,601 WARN L838 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from false [2021-11-21 01:15:18,653 WARN L860 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from true [2021-11-21 01:15:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-21 01:15:19,605 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:15:19,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845408801] [2021-11-21 01:15:19,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845408801] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:15:19,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [327921909] [2021-11-21 01:15:19,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:19,607 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:15:19,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:15:19,609 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:15:19,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-21 01:15:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:20,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:15:20,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:15:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:15:20,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:15:28,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-21 01:15:28,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [327921909] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:15:28,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558344734] [2021-11-21 01:15:28,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:28,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:15:28,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:15:28,180 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:15:28,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:15:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:36,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:15:36,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:15:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:15:48,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:16:13,326 WARN L227 SmtUtils]: Spent 6.63s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:16:27,899 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (fp.eq .cse0 |c_ULTIMATE.start_main_~x1~0#1|)))) is different from false [2021-11-21 01:16:29,946 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (fp.eq .cse0 |c_ULTIMATE.start_main_~x1~0#1|)))) is different from true [2021-11-21 01:16:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-21 01:16:39,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558344734] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:16:39,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:16:39,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 7] total 16 [2021-11-21 01:16:39,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260533821] [2021-11-21 01:16:39,174 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:16:39,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 01:16:39,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:16:39,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 01:16:39,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=130, Unknown=6, NotChecked=50, Total=240 [2021-11-21 01:16:39,177 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:16:41,190 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:16:43,216 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:16:47,387 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse1 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse2))) (let ((.cse0 (not (fp.eq (fp.div c_currentRoundingMode .cse1 .cse2) .cse1)))) (and (or .cse0 (fp.eq .cse1 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (fp.eq .cse1 |c_ULTIMATE.start_main_~x1~0#1|)) .cse0 (not (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|)) (= c_currentRoundingMode roundNearestTiesToEven) (= (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse2) |c_ULTIMATE.start_main_~x1~0#1|))))) is different from true [2021-11-21 01:17:03,038 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:17:05,067 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:17:09,447 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:17:11,451 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:17:13,477 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:17:15,507 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:17:36,356 WARN L227 SmtUtils]: Spent 11.19s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:17:38,832 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:17:40,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:17:40,091 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-11-21 01:17:40,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:17:40,114 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 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 8 [2021-11-21 01:17:40,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:17:40,114 INFO L225 Difference]: With dead ends: 16 [2021-11-21 01:17:40,114 INFO L226 Difference]: Without dead ends: 12 [2021-11-21 01:17:40,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 74.9s TimeCoverageRelationStatistics Valid=80, Invalid=193, Unknown=11, NotChecked=96, Total=380 [2021-11-21 01:17:40,118 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 9 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 23.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:17:40,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 18 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 32 Invalid, 9 Unknown, 17 Unchecked, 23.7s Time] [2021-11-21 01:17:40,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-21 01:17:40,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-21 01:17:40,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:17:40,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-11-21 01:17:40,124 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2021-11-21 01:17:40,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:17:40,124 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-11-21 01:17:40,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:17:40,125 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-11-21 01:17:40,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:17:40,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:17:40,125 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2021-11-21 01:17:40,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:17:40,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:17:40,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:17:40,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:17:40,727 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:17:40,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:17:40,728 INFO L85 PathProgramCache]: Analyzing trace with hash 522938704, now seen corresponding path program 2 times [2021-11-21 01:17:40,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:17:40,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311020631] [2021-11-21 01:17:40,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:17:40,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:17:40,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:17:40,731 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:17:40,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-21 01:17:41,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:17:41,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:17:41,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:17:41,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:17:51,989 WARN L860 $PredicateComparison]: unable to prove that (and (= (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) .cse0)) |c_ULTIMATE.start_main_~x1~0#1|) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-21 01:17:58,098 WARN L860 $PredicateComparison]: unable to prove that (and (= (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) .cse0) .cse0)) |c_ULTIMATE.start_main_~x1~0#1|) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-21 01:18:22,237 WARN L227 SmtUtils]: Spent 7.08s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:18:22,266 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 3 times theorem prover too weak. 0 trivial. 9 not checked. [2021-11-21 01:18:22,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:18:28,575 WARN L860 $PredicateComparison]: unable to prove that (or (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0))) |c_ULTIMATE.start_main_~x1~0#1|))) is different from true [2021-11-21 01:18:37,622 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from true [2021-11-21 01:18:48,187 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from false [2021-11-21 01:18:50,255 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from true [2021-11-21 01:19:01,028 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from false [2021-11-21 01:19:03,119 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from true [2021-11-21 01:19:14,134 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from false [2021-11-21 01:19:16,248 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from true [2021-11-21 01:19:27,117 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from false [2021-11-21 01:19:29,218 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from true [2021-11-21 01:19:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 15 not checked. [2021-11-21 01:19:29,219 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:19:29,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311020631] [2021-11-21 01:19:29,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311020631] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:19:29,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1839218885] [2021-11-21 01:19:29,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:19:29,220 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:19:29,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:19:29,221 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:19:29,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-21 01:19:30,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:19:30,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:19:30,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:19:30,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:19:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 3 times theorem prover too weak. 0 trivial. 9 not checked. [2021-11-21 01:19:43,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:20:27,926 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 15 not checked. [2021-11-21 01:20:27,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1839218885] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:20:27,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152160025] [2021-11-21 01:20:27,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:20:27,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:20:27,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:20:27,929 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:20:27,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:20:39,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:20:39,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:20:39,182 WARN L261 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:20:39,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:21:05,691 WARN L227 SmtUtils]: Spent 5.39s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:21:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 6 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-21 01:21:10,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:21:18,162 WARN L860 $PredicateComparison]: unable to prove that (or (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0))) |c_ULTIMATE.start_main_~x1~0#1|))) is different from true [2021-11-21 01:21:32,150 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (fp.eq .cse0 |c_ULTIMATE.start_main_~x1~0#1|)))) is different from true [2021-11-21 01:21:46,950 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse2 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 .cse2))))) is different from false [2021-11-21 01:21:49,025 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse2 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 .cse2))))) is different from true [2021-11-21 01:22:04,034 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse2 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (fp.eq .cse0 .cse2))))) is different from false [2021-11-21 01:22:06,126 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse2 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (fp.eq .cse0 .cse2))))) is different from true [2021-11-21 01:22:21,546 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse2 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1) .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (fp.eq .cse0 .cse2))))) is different from false [2021-11-21 01:22:23,668 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse2 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1) .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (fp.eq .cse0 .cse2))))) is different from true [2021-11-21 01:22:38,358 WARN L227 SmtUtils]: Spent 5.93s on a formula simplification. DAG size of input: 13 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 01:22:38,359 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 15 not checked. [2021-11-21 01:22:38,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152160025] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:22:38,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:22:38,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8, 10, 8, 10] total 24 [2021-11-21 01:22:38,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172214740] [2021-11-21 01:22:38,360 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:22:38,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-21 01:22:38,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:22:38,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-21 01:22:38,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=80, Unknown=29, NotChecked=390, Total=552 [2021-11-21 01:22:38,363 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:22:40,498 WARN L860 $PredicateComparison]: unable to prove that (and (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-21 01:22:42,627 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse3 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse4) .cse4) .cse4))) (let ((.cse2 (fp.div c_currentRoundingMode .cse3 .cse4))) (let ((.cse0 (not (fp.eq (fp.div c_currentRoundingMode .cse2 .cse4) .cse2))) (.cse1 (fp.eq .cse2 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))))) (and (or .cse0 .cse1 (fp.eq .cse2 .cse3)) (or .cse0 .cse1) (= c_currentRoundingMode roundNearestTiesToEven) (= (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse4) |c_ULTIMATE.start_main_~x1~0#1|)))))) is different from false [2021-11-21 01:22:44,756 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse3 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse4) .cse4) .cse4))) (let ((.cse2 (fp.div c_currentRoundingMode .cse3 .cse4))) (let ((.cse0 (not (fp.eq (fp.div c_currentRoundingMode .cse2 .cse4) .cse2))) (.cse1 (fp.eq .cse2 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))))) (and (or .cse0 .cse1 (fp.eq .cse2 .cse3)) (or .cse0 .cse1) (= c_currentRoundingMode roundNearestTiesToEven) (= (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse4) |c_ULTIMATE.start_main_~x1~0#1|)))))) is different from true [2021-11-21 01:22:46,864 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse4 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse0) .cse0))) (let ((.cse3 (fp.div c_currentRoundingMode .cse4 .cse0))) (let ((.cse1 (not (fp.eq (fp.div c_currentRoundingMode .cse3 .cse0) .cse3))) (.cse2 (fp.eq .cse3 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))))) (and (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse0) .cse0)) (or .cse1 .cse2) (or .cse1 .cse2 (fp.eq .cse3 .cse4)) (= c_currentRoundingMode roundNearestTiesToEven)))))) is different from true [2021-11-21 01:22:48,941 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse3 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse4))) (let ((.cse2 (fp.div c_currentRoundingMode .cse3 .cse4))) (let ((.cse0 (fp.eq .cse2 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))) (.cse1 (not (fp.eq (fp.div c_currentRoundingMode .cse2 .cse4) .cse2)))) (and (or .cse0 .cse1 (fp.eq .cse2 .cse3)) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse4) .cse4) .cse4)) (or .cse0 .cse1) (= c_currentRoundingMode roundNearestTiesToEven)))))) is different from false [2021-11-21 01:22:51,111 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse3 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse4))) (let ((.cse2 (fp.div c_currentRoundingMode .cse3 .cse4))) (let ((.cse0 (fp.eq .cse2 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))) (.cse1 (not (fp.eq (fp.div c_currentRoundingMode .cse2 .cse4) .cse2)))) (and (or .cse0 .cse1 (fp.eq .cse2 .cse3)) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse4) .cse4) .cse4)) (or .cse0 .cse1) (= c_currentRoundingMode roundNearestTiesToEven)))))) is different from true [2021-11-21 01:22:53,172 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse2 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse3))) (let ((.cse0 (not (fp.eq (fp.div c_currentRoundingMode .cse2 .cse3) .cse2))) (.cse1 (fp.eq .cse2 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))))) (and (or .cse0 .cse1 (fp.eq .cse2 |c_ULTIMATE.start_main_~x1~0#1|)) (or .cse0 .cse1) (= (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse3) .cse3) .cse3) .cse3) |c_ULTIMATE.start_main_~x1~0#1|) (= c_currentRoundingMode roundNearestTiesToEven))))) is different from true [2021-11-21 01:22:55,303 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse2 (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))) (.cse3 (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) |c_ULTIMATE.start_main_~x1~0#1|))) (.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1) .cse1))) (and (= .cse0 |c_ULTIMATE.start_main_~x~0#1|) (= (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse1) |c_ULTIMATE.start_main_~x1~0#1|) (or (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|) .cse2 .cse3) (or .cse2 .cse3) (= (fp.div c_currentRoundingMode .cse0 .cse1) |c_ULTIMATE.start_main_~x1~0#1|) (= c_currentRoundingMode roundNearestTiesToEven)))) is different from true [2021-11-21 01:22:59,165 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:23:01,727 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:23:01,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:23:01,782 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-11-21 01:23:01,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 01:23:01,783 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 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 11 [2021-11-21 01:23:01,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:23:01,784 INFO L225 Difference]: With dead ends: 20 [2021-11-21 01:23:01,784 INFO L226 Difference]: Without dead ends: 14 [2021-11-21 01:23:01,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 19 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 104.6s TimeCoverageRelationStatistics Valid=85, Invalid=136, Unknown=37, NotChecked=798, Total=1056 [2021-11-21 01:23:01,786 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:23:01,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 13 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 2 Unknown, 83 Unchecked, 4.9s Time] [2021-11-21 01:23:01,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-21 01:23:01,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-21 01:23:01,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:23:01,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-11-21 01:23:01,799 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2021-11-21 01:23:01,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:23:01,799 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-11-21 01:23:01,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:23:01,800 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-11-21 01:23:01,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:23:01,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:23:01,801 INFO L514 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2021-11-21 01:23:01,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:23:02,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-21 01:23:02,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-11-21 01:23:02,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:23:02,402 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:23:02,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:23:02,403 INFO L85 PathProgramCache]: Analyzing trace with hash 86212784, now seen corresponding path program 3 times [2021-11-21 01:23:02,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:23:02,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647473121] [2021-11-21 01:23:02,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:23:02,404 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:23:02,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:23:02,405 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:23:02,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-21 01:23:02,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:23:02,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:23:02,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:23:02,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:23:16,782 WARN L838 $PredicateComparison]: unable to prove that (and (= (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0))) |c_ULTIMATE.start_main_~x1~0#1|) (exists ((|v_ULTIMATE.start_main_~x~0#1_37| (_ FloatingPoint 8 24))) (and (= |c_ULTIMATE.start_main_~x~0#1| (fp.div c_currentRoundingMode |v_ULTIMATE.start_main_~x~0#1_37| ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (not (fp.eq |c_ULTIMATE.start_main_~x~0#1| |v_ULTIMATE.start_main_~x~0#1_37|)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-21 01:23:29,608 WARN L838 $PredicateComparison]: unable to prove that (and (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0))) |c_ULTIMATE.start_main_~x~0#1|) (exists ((|v_ULTIMATE.start_main_~x~0#1_37| (_ FloatingPoint 8 24))) (and (= |c_ULTIMATE.start_main_~x~0#1| (fp.div c_currentRoundingMode |v_ULTIMATE.start_main_~x~0#1_37| ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (not (fp.eq |c_ULTIMATE.start_main_~x~0#1| |v_ULTIMATE.start_main_~x~0#1_37|)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-21 01:24:19,831 WARN L838 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~x~0#1_37| (_ FloatingPoint 8 24))) (let ((.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 2.0)))) (let ((.cse1 (fp.div roundNearestTiesToEven |v_ULTIMATE.start_main_~x~0#1_37| .cse2))) (and (let ((.cse0 (fp.eq .cse1 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv0 32))))) (or (and (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv0 32)) (not .cse0)) (and .cse0 (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv1 32))))) (fp.eq (fp.div roundNearestTiesToEven .cse1 .cse2) .cse1) (not (fp.eq .cse1 |v_ULTIMATE.start_main_~x~0#1_37|)))))) is different from false [2021-11-21 01:24:21,865 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~x~0#1_37| (_ FloatingPoint 8 24))) (let ((.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 2.0)))) (let ((.cse1 (fp.div roundNearestTiesToEven |v_ULTIMATE.start_main_~x~0#1_37| .cse2))) (and (let ((.cse0 (fp.eq .cse1 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv0 32))))) (or (and (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv0 32)) (not .cse0)) (and .cse0 (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv1 32))))) (fp.eq (fp.div roundNearestTiesToEven .cse1 .cse2) .cse1) (not (fp.eq .cse1 |v_ULTIMATE.start_main_~x~0#1_37|)))))) is different from true [2021-11-21 01:24:37,507 WARN L838 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~x~0#1_37| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 2.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven |v_ULTIMATE.start_main_~x~0#1_37| .cse1))) (and (not (fp.eq .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv0 32)))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0) (not (fp.eq .cse0 |v_ULTIMATE.start_main_~x~0#1_37|)))))) is different from false [2021-11-21 01:24:39,539 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~x~0#1_37| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 2.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven |v_ULTIMATE.start_main_~x~0#1_37| .cse1))) (and (not (fp.eq .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv0 32)))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0) (not (fp.eq .cse0 |v_ULTIMATE.start_main_~x~0#1_37|)))))) is different from true [2021-11-21 01:24:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 7 not checked. [2021-11-21 01:24:39,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:24:51,916 WARN L860 $PredicateComparison]: unable to prove that (or (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0))) |c_ULTIMATE.start_main_~x1~0#1|))) is different from true [2021-11-21 01:25:04,934 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1_39| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |v_ULTIMATE.start_main_~x~0#1_39| .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 |v_ULTIMATE.start_main_~x~0#1_39|))))) is different from false [2021-11-21 01:25:06,979 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1_39| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |v_ULTIMATE.start_main_~x~0#1_39| .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 |v_ULTIMATE.start_main_~x~0#1_39|))))) is different from true [2021-11-21 01:26:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 13 not checked. [2021-11-21 01:26:14,126 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:14,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647473121] [2021-11-21 01:26:14,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647473121] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:26:14,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1774449433] [2021-11-21 01:26:14,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:26:14,127 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:26:14,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:26:14,134 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:26:14,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_388a59da-5ff1-43e7-913a-d6f0dd97bf6d/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-21 01:26:15,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:26:15,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:26:15,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:26:15,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:42,487 WARN L227 SmtUtils]: Spent 8.97s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:26:56,285 WARN L838 $PredicateComparison]: unable to prove that (and (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0))) |c_ULTIMATE.start_main_~x~0#1|) (exists ((|v_ULTIMATE.start_main_~x~0#1_46| (_ FloatingPoint 8 24))) (let ((.cse0 (fp.div c_currentRoundingMode |v_ULTIMATE.start_main_~x~0#1_46| ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0))))) (and (not (fp.eq .cse0 |v_ULTIMATE.start_main_~x~0#1_46|)) (= |c_ULTIMATE.start_main_~x~0#1| .cse0)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-21 01:27:45,911 WARN L838 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~x~0#1_46| (_ FloatingPoint 8 24))) (let ((.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 2.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven |v_ULTIMATE.start_main_~x~0#1_46| .cse2))) (and (not (fp.eq .cse0 |v_ULTIMATE.start_main_~x~0#1_46|)) (let ((.cse1 (fp.eq .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv0 32))))) (or (and (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv0 32)) (not .cse1)) (and (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv1 32)) .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse2) .cse0))))) is different from false [2021-11-21 01:27:47,947 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~x~0#1_46| (_ FloatingPoint 8 24))) (let ((.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 2.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven |v_ULTIMATE.start_main_~x~0#1_46| .cse2))) (and (not (fp.eq .cse0 |v_ULTIMATE.start_main_~x~0#1_46|)) (let ((.cse1 (fp.eq .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv0 32))))) (or (and (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv0 32)) (not .cse1)) (and (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv1 32)) .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse2) .cse0))))) is different from true [2021-11-21 01:28:03,575 WARN L838 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~x~0#1_46| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 2.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven |v_ULTIMATE.start_main_~x~0#1_46| .cse1))) (and (not (fp.eq .cse0 |v_ULTIMATE.start_main_~x~0#1_46|)) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0) (not (fp.eq .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv0 32)))))))) is different from false [2021-11-21 01:28:05,605 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~x~0#1_46| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 2.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven |v_ULTIMATE.start_main_~x~0#1_46| .cse1))) (and (not (fp.eq .cse0 |v_ULTIMATE.start_main_~x~0#1_46|)) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0) (not (fp.eq .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv0 32)))))))) is different from true [2021-11-21 01:28:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:28:05,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:28:25,024 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~x1~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |ULTIMATE.start_main_~x1~0#1| .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (fp.eq .cse0 |ULTIMATE.start_main_~x1~0#1|))))) is different from false [2021-11-21 01:28:27,068 WARN L860 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~x1~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |ULTIMATE.start_main_~x1~0#1| .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (fp.eq .cse0 |ULTIMATE.start_main_~x1~0#1|))))) is different from true