./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-esbmc-regression/Double_div.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V --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 2f4e199f6665b6821475945a72290dab8d4d620db3a5150842d6f2ec9f4c430d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:27:27,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:27:27,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:27:27,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:27:27,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:27:27,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:27:27,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:27:27,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:27:27,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:27:27,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:27:27,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:27:27,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:27:27,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:27:27,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:27:27,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:27:27,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:27:27,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:27:27,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:27:27,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:27:27,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:27:27,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:27:27,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:27:27,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:27:27,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:27:27,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:27:27,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:27:27,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:27:27,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:27:27,467 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:27:27,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:27:27,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:27:27,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:27:27,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:27:27,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:27:27,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:27:27,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:27:27,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:27:27,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:27:27,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:27:27,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:27:27,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:27:27,480 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:27:27,522 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:27:27,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:27:27,530 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:27:27,530 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:27:27,531 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:27:27,531 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:27:27,532 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:27:27,532 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:27:27,532 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:27:27,532 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:27:27,534 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:27:27,534 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:27:27,534 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:27:27,534 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:27:27,535 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:27:27,535 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:27:27,535 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:27:27,535 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:27:27,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:27:27,536 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:27:27,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:27:27,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:27:27,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:27:27,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:27:27,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:27:27,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:27:27,539 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:27:27,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:27:27,540 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:27:27,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:27:27,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:27:27,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:27:27,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:27:27,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:27:27,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:27:27,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:27:27,542 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:27:27,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:27:27,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:27:27,543 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:27:27,543 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:27:27,543 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_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f4e199f6665b6821475945a72290dab8d4d620db3a5150842d6f2ec9f4c430d [2021-11-23 02:27:27,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:27:27,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:27:27,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:27:27,868 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:27:27,868 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:27:27,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/floats-esbmc-regression/Double_div.i [2021-11-23 02:27:27,946 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/data/b98f1a7e5/9c5c7e6557bc4db68ab0108b76247c83/FLAG1a0e1a523 [2021-11-23 02:27:28,450 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:27:28,451 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/sv-benchmarks/c/floats-esbmc-regression/Double_div.i [2021-11-23 02:27:28,461 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/data/b98f1a7e5/9c5c7e6557bc4db68ab0108b76247c83/FLAG1a0e1a523 [2021-11-23 02:27:28,807 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/data/b98f1a7e5/9c5c7e6557bc4db68ab0108b76247c83 [2021-11-23 02:27:28,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:27:28,811 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:27:28,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:27:28,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:27:28,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:27:28,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:27:28" (1/1) ... [2021-11-23 02:27:28,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@215379d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28, skipping insertion in model container [2021-11-23 02:27:28,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:27:28" (1/1) ... [2021-11-23 02:27:28,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:27:28,845 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:27:29,032 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_9690176f-7714-4290-ac2e-760c9033d3e8/sv-benchmarks/c/floats-esbmc-regression/Double_div.i[804,817] [2021-11-23 02:27:29,044 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:27:29,053 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:27:29,066 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_9690176f-7714-4290-ac2e-760c9033d3e8/sv-benchmarks/c/floats-esbmc-regression/Double_div.i[804,817] [2021-11-23 02:27:29,069 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:27:29,082 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:27:29,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:29 WrapperNode [2021-11-23 02:27:29,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:27:29,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:27:29,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:27:29,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:27:29,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:29" (1/1) ... [2021-11-23 02:27:29,099 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:29" (1/1) ... [2021-11-23 02:27:29,116 INFO L137 Inliner]: procedures = 14, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2021-11-23 02:27:29,116 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:27:29,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:27:29,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:27:29,118 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:27:29,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:29" (1/1) ... [2021-11-23 02:27:29,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:29" (1/1) ... [2021-11-23 02:27:29,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:29" (1/1) ... [2021-11-23 02:27:29,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:29" (1/1) ... [2021-11-23 02:27:29,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:29" (1/1) ... [2021-11-23 02:27:29,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:29" (1/1) ... [2021-11-23 02:27:29,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:29" (1/1) ... [2021-11-23 02:27:29,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:27:29,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:27:29,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:27:29,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:27:29,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:29" (1/1) ... [2021-11-23 02:27:29,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:27:29,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:29,187 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:27:29,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:27:29,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:27:29,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:27:29,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:27:29,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:27:29,310 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:27:29,312 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:27:29,427 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:27:29,471 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:27:29,471 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:27:29,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:29 BoogieIcfgContainer [2021-11-23 02:27:29,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:27:29,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:27:29,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:27:29,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:27:29,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:27:28" (1/3) ... [2021-11-23 02:27:29,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6103ebf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:27:29, skipping insertion in model container [2021-11-23 02:27:29,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:29" (2/3) ... [2021-11-23 02:27:29,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6103ebf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:27:29, skipping insertion in model container [2021-11-23 02:27:29,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:29" (3/3) ... [2021-11-23 02:27:29,492 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div.i [2021-11-23 02:27:29,501 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:27:29,505 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:27:29,562 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:27:29,574 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 [2021-11-23 02:27:29,574 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:27:29,601 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) [2021-11-23 02:27:29,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 02:27:29,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:29,614 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 02:27:29,615 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:29,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:29,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1880294, now seen corresponding path program 1 times [2021-11-23 02:27:29,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:29,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271573408] [2021-11-23 02:27:29,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:29,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:27:29,742 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 02:27:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:27:29,789 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 02:27:29,791 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 02:27:29,792 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 02:27:29,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:27:29,800 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-23 02:27:29,803 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:27:29,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:27:29 BoogieIcfgContainer [2021-11-23 02:27:29,826 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:27:29,829 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:27:29,830 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:27:29,830 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:27:29,831 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:29" (3/4) ... [2021-11-23 02:27:29,834 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 02:27:29,834 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:27:29,836 INFO L158 Benchmark]: Toolchain (without parser) took 1023.94ms. Allocated memory was 79.7MB in the beginning and 117.4MB in the end (delta: 37.7MB). Free memory was 42.7MB in the beginning and 69.5MB in the end (delta: -26.9MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. [2021-11-23 02:27:29,837 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 79.7MB. Free memory was 59.2MB in the beginning and 59.1MB in the end (delta: 41.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:27:29,838 INFO L158 Benchmark]: CACSL2BoogieTranslator took 269.88ms. Allocated memory was 79.7MB in the beginning and 117.4MB in the end (delta: 37.7MB). Free memory was 42.5MB in the beginning and 94.0MB in the end (delta: -51.5MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. [2021-11-23 02:27:29,839 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.67ms. Allocated memory is still 117.4MB. Free memory was 94.0MB in the beginning and 92.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:27:29,845 INFO L158 Benchmark]: Boogie Preprocessor took 30.53ms. Allocated memory is still 117.4MB. Free memory was 92.4MB in the beginning and 91.4MB in the end (delta: 949.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:27:29,846 INFO L158 Benchmark]: RCFGBuilder took 331.58ms. Allocated memory is still 117.4MB. Free memory was 91.4MB in the beginning and 82.7MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 02:27:29,847 INFO L158 Benchmark]: TraceAbstraction took 343.99ms. Allocated memory is still 117.4MB. Free memory was 82.1MB in the beginning and 70.0MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 02:27:29,848 INFO L158 Benchmark]: Witness Printer took 4.83ms. Allocated memory is still 117.4MB. Free memory was 70.0MB in the beginning and 69.5MB in the end (delta: 477.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:27:29,858 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 79.7MB. Free memory was 59.2MB in the beginning and 59.1MB in the end (delta: 41.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 269.88ms. Allocated memory was 79.7MB in the beginning and 117.4MB in the end (delta: 37.7MB). Free memory was 42.5MB in the beginning and 94.0MB in the end (delta: -51.5MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.67ms. Allocated memory is still 117.4MB. Free memory was 94.0MB in the beginning and 92.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.53ms. Allocated memory is still 117.4MB. Free memory was 92.4MB in the beginning and 91.4MB in the end (delta: 949.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 331.58ms. Allocated memory is still 117.4MB. Free memory was 91.4MB in the beginning and 82.7MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 343.99ms. Allocated memory is still 117.4MB. Free memory was 82.1MB in the beginning and 70.0MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Witness Printer took 4.83ms. Allocated memory is still 117.4MB. Free memory was 70.0MB in the beginning and 69.5MB in the end (delta: 477.1kB). Peak memory consumption was 2.1MB. 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 someBinaryDOUBLEComparisonOperation at line 23, overapproximation of someBinaryArithmeticDOUBLEoperation at line 21. Possible FailurePath: [L20] double x = 1.0; [L21] double x1 = x/2.5; 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 [2021-11-23 02:27:29,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/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_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V --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 2f4e199f6665b6821475945a72290dab8d4d620db3a5150842d6f2ec9f4c430d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:27:32,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:27:32,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:27:32,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:27:32,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:27:32,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:27:32,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:27:32,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:27:32,424 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:27:32,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:27:32,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:27:32,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:27:32,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:27:32,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:27:32,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:27:32,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:27:32,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:27:32,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:27:32,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:27:32,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:27:32,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:27:32,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:27:32,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:27:32,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:27:32,481 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:27:32,481 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:27:32,482 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:27:32,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:27:32,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:27:32,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:27:32,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:27:32,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:27:32,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:27:32,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:27:32,493 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:27:32,493 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:27:32,494 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:27:32,494 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:27:32,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:27:32,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:27:32,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:27:32,499 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 02:27:32,542 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:27:32,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:27:32,542 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:27:32,542 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:27:32,543 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:27:32,543 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:27:32,543 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:27:32,543 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:27:32,544 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:27:32,544 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:27:32,544 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:27:32,544 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:27:32,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:27:32,545 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:27:32,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:27:32,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:27:32,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:27:32,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:27:32,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:27:32,546 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:27:32,546 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 02:27:32,547 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 02:27:32,547 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:27:32,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:27:32,547 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:27:32,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:27:32,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:27:32,548 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 02:27:32,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:27:32,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:27:32,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:27:32,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:27:32,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:27:32,549 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 02:27:32,549 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 02:27:32,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:27:32,549 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:27:32,550 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:27:32,550 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_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f4e199f6665b6821475945a72290dab8d4d620db3a5150842d6f2ec9f4c430d [2021-11-23 02:27:32,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:27:33,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:27:33,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:27:33,020 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:27:33,020 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:27:33,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/floats-esbmc-regression/Double_div.i [2021-11-23 02:27:33,095 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/data/b9b44841a/ce4c758a8a17453cb68de4693d0c7b9e/FLAGe73e93173 [2021-11-23 02:27:33,698 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:27:33,699 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/sv-benchmarks/c/floats-esbmc-regression/Double_div.i [2021-11-23 02:27:33,706 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/data/b9b44841a/ce4c758a8a17453cb68de4693d0c7b9e/FLAGe73e93173 [2021-11-23 02:27:34,052 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/data/b9b44841a/ce4c758a8a17453cb68de4693d0c7b9e [2021-11-23 02:27:34,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:27:34,060 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:27:34,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:27:34,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:27:34,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:27:34,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:27:34" (1/1) ... [2021-11-23 02:27:34,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6979378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:34, skipping insertion in model container [2021-11-23 02:27:34,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:27:34" (1/1) ... [2021-11-23 02:27:34,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:27:34,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:27:34,297 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_9690176f-7714-4290-ac2e-760c9033d3e8/sv-benchmarks/c/floats-esbmc-regression/Double_div.i[804,817] [2021-11-23 02:27:34,309 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:27:34,323 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:27:34,338 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_9690176f-7714-4290-ac2e-760c9033d3e8/sv-benchmarks/c/floats-esbmc-regression/Double_div.i[804,817] [2021-11-23 02:27:34,341 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:27:34,377 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:27:34,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:34 WrapperNode [2021-11-23 02:27:34,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:27:34,392 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:27:34,392 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:27:34,392 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:27:34,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:34" (1/1) ... [2021-11-23 02:27:34,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:34" (1/1) ... [2021-11-23 02:27:34,433 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2021-11-23 02:27:34,434 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:27:34,435 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:27:34,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:27:34,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:27:34,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:34" (1/1) ... [2021-11-23 02:27:34,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:34" (1/1) ... [2021-11-23 02:27:34,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:34" (1/1) ... [2021-11-23 02:27:34,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:34" (1/1) ... [2021-11-23 02:27:34,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:34" (1/1) ... [2021-11-23 02:27:34,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:34" (1/1) ... [2021-11-23 02:27:34,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:34" (1/1) ... [2021-11-23 02:27:34,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:27:34,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:27:34,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:27:34,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:27:34,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:34" (1/1) ... [2021-11-23 02:27:34,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:27:34,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:34,535 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:27:34,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:27:34,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:27:34,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 02:27:34,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:27:34,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:27:34,670 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:27:34,672 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:27:38,180 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:27:38,193 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:27:38,194 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:27:38,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:38 BoogieIcfgContainer [2021-11-23 02:27:38,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:27:38,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:27:38,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:27:38,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:27:38,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:27:34" (1/3) ... [2021-11-23 02:27:38,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb9ae34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:27:38, skipping insertion in model container [2021-11-23 02:27:38,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:34" (2/3) ... [2021-11-23 02:27:38,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb9ae34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:27:38, skipping insertion in model container [2021-11-23 02:27:38,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:38" (3/3) ... [2021-11-23 02:27:38,201 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div.i [2021-11-23 02:27:38,205 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:27:38,214 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:27:38,302 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:27:38,316 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 [2021-11-23 02:27:38,317 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:27:38,330 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) [2021-11-23 02:27:38,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 02:27:38,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:38,358 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 02:27:38,359 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:38,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:38,365 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-11-23 02:27:38,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:27:38,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [86687795] [2021-11-23 02:27:38,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:38,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:27:38,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:27:38,391 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:27:38,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 02:27:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:38,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:27:38,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:47,769 WARN L227 SmtUtils]: Spent 5.01s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:27:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:47,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:49,697 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:27:49,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [86687795] [2021-11-23 02:27:49,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [86687795] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:49,698 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:49,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-23 02:27:49,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054751773] [2021-11-23 02:27:49,701 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:49,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:27:49,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:27:49,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:27:49,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-11-23 02:27:49,737 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) [2021-11-23 02:27:52,584 WARN L860 $PredicateComparison]: unable to prove that (and (= (fp.div roundNearestTiesToEven |c_ULTIMATE.start_main_~x~0#1| ((_ to_fp 11 53) roundNearestTiesToEven (/ 5.0 2.0))) |c_ULTIMATE.start_main_~x1~0#1|) (= ((_ to_fp 11 53) roundNearestTiesToEven 1.0) |c_ULTIMATE.start_main_~x~0#1|) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-23 02:27:52,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:52,606 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-11-23 02:27:52,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:27:52,609 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 [2021-11-23 02:27:52,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:52,615 INFO L225 Difference]: With dead ends: 20 [2021-11-23 02:27:52,616 INFO L226 Difference]: Without dead ends: 8 [2021-11-23 02:27:52,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=10, Invalid=12, Unknown=2, NotChecked=6, Total=30 [2021-11-23 02:27:52,622 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:52,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 1 Unchecked, 0.6s Time] [2021-11-23 02:27:52,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-23 02:27:52,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-23 02:27:52,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2021-11-23 02:27:52,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-23 02:27:52,650 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-11-23 02:27:52,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:52,651 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-23 02:27:52,651 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) [2021-11-23 02:27:52,651 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-23 02:27:52,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 02:27:52,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:52,652 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:52,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 02:27:52,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:27:52,869 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:52,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:52,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-11-23 02:27:52,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:27:52,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131803396] [2021-11-23 02:27:52,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:52,878 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:27:52,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:27:52,879 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:27:52,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 02:27:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:53,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:27:53,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:28:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:28:03,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:28:10,431 WARN L838 $PredicateComparison]: unable to prove that (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0))) |c_ULTIMATE.start_main_~x1~0#1|)) is different from false [2021-11-23 02:28:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-23 02:28:14,294 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:28:14,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131803396] [2021-11-23 02:28:14,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131803396] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:28:14,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1430840957] [2021-11-23 02:28:14,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:14,295 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:28:14,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:28:14,298 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:28:14,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-23 02:28:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:15,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:28:15,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:28:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:28:32,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:28:36,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-23 02:28:36,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1430840957] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:28:36,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183784514] [2021-11-23 02:28:36,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:36,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:36,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:28:36,403 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:28:36,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:29:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:28,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:29:28,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:42,023 WARN L227 SmtUtils]: Spent 6.41s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:29:42,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:29:42,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:29:55,535 WARN L838 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0))) |c_ULTIMATE.start_main_~x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from false [2021-11-23 02:29:57,666 WARN L860 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0))) |c_ULTIMATE.start_main_~x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from true [2021-11-23 02:29:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-23 02:29:58,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183784514] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:29:58,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:29:58,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 6] total 14 [2021-11-23 02:29:58,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859934365] [2021-11-23 02:29:58,633 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:29:58,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 02:29:58,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:29:58,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 02:29:58,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=96, Unknown=5, NotChecked=42, Total=182 [2021-11-23 02:29:58,636 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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) [2021-11-23 02:30:02,441 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse1 (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse0) |c_ULTIMATE.start_main_~x1~0#1|)))) (and (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0)) (not (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|)) (or .cse1 (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) .cse1 (= c_currentRoundingMode roundNearestTiesToEven)))) is different from true [2021-11-23 02:30:07,567 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 02:30:10,043 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 02:30:10,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:10,170 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-11-23 02:30:10,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:30:10,171 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 02:30:10,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:10,171 INFO L225 Difference]: With dead ends: 14 [2021-11-23 02:30:10,171 INFO L226 Difference]: Without dead ends: 10 [2021-11-23 02:30:10,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 40.2s TimeCoverageRelationStatistics Valid=47, Invalid=115, Unknown=6, NotChecked=72, Total=240 [2021-11-23 02:30:10,174 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:10,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 20 Invalid, 2 Unknown, 19 Unchecked, 8.6s Time] [2021-11-23 02:30:10,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-23 02:30:10,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-23 02:30:10,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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) [2021-11-23 02:30:10,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-11-23 02:30:10,179 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2021-11-23 02:30:10,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:10,179 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-11-23 02:30:10,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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) [2021-11-23 02:30:10,180 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-11-23 02:30:10,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:30:10,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:10,180 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:10,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-11-23 02:30:10,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:10,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:10,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:10,782 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:10,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:10,783 INFO L85 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 2 times [2021-11-23 02:30:10,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:30:10,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128690707] [2021-11-23 02:30:10,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:30:10,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:30:10,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:30:10,790 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:30:10,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 02:30:11,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:30:11,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:30:11,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:30:11,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:15,364 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~x1~0#1| (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-23 02:30:20,419 WARN L227 SmtUtils]: Spent 5.04s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:30:22,666 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~x1~0#1| (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-23 02:30:31,904 WARN L227 SmtUtils]: Spent 5.46s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:30:34,868 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (and (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse0)) (= (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) |c_ULTIMATE.start_main_~x~0#1|) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-11-23 02:30:34,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-23 02:30:34,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:30:44,335 WARN L838 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0))) |c_ULTIMATE.start_main_~x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from false [2021-11-23 02:30:46,458 WARN L860 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0))) |c_ULTIMATE.start_main_~x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from true [2021-11-23 02:30:58,408 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) 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 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from false [2021-11-23 02:31:00,661 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) 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 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from true [2021-11-23 02:31:06,116 WARN L227 SmtUtils]: Spent 5.45s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:31:11,315 WARN L227 SmtUtils]: Spent 5.20s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:31:13,636 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) 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 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from false [2021-11-23 02:31:15,953 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) 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 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from true [2021-11-23 02:31:21,421 WARN L227 SmtUtils]: Spent 5.46s on a formula simplification that was a NOOP. DAG size: 11 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:31:26,644 WARN L227 SmtUtils]: Spent 5.22s on a formula simplification that was a NOOP. DAG size: 11 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:31:28,972 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from false [2021-11-23 02:31:31,296 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from true [2021-11-23 02:31:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-23 02:31:31,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:31:31,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128690707] [2021-11-23 02:31:31,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128690707] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:31:31,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [778443149] [2021-11-23 02:31:31,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:31:31,297 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:31:31,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:31:31,299 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:31:31,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 02:31:33,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:31:33,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:31:33,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:31:33,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:31:49,542 WARN L227 SmtUtils]: Spent 5.43s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:31:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-23 02:31:49,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:32:11,675 WARN L227 SmtUtils]: Spent 5.47s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:32:16,843 WARN L227 SmtUtils]: Spent 5.17s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:32:22,294 WARN L227 SmtUtils]: Spent 5.45s on a formula simplification that was a NOOP. DAG size: 11 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:32:27,451 WARN L227 SmtUtils]: Spent 5.15s on a formula simplification that was a NOOP. DAG size: 11 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:32:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-23 02:32:27,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [778443149] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:32:27,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786279311] [2021-11-23 02:32:27,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:32:27,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:32:27,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:32:27,453 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:32:27,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:34:03,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:34:03,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:34:03,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:34:03,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:34:19,319 WARN L227 SmtUtils]: Spent 5.49s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:34:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-23 02:34:19,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:34:36,151 WARN L227 SmtUtils]: Spent 5.01s on a formula simplification that was a NOOP. DAG size: 8 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:34:41,703 WARN L227 SmtUtils]: Spent 5.54s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:34:46,952 WARN L227 SmtUtils]: Spent 5.24s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:34:52,509 WARN L227 SmtUtils]: Spent 5.55s on a formula simplification that was a NOOP. DAG size: 11 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:34:57,759 WARN L227 SmtUtils]: Spent 5.25s on a formula simplification that was a NOOP. DAG size: 11 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:34:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-23 02:34:57,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786279311] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:34:57,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:34:57,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6, 8, 6, 8] total 13 [2021-11-23 02:34:57,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672057526] [2021-11-23 02:34:57,760 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:34:57,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 02:34:57,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:34:57,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 02:34:57,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=32, Unknown=11, NotChecked=112, Total=182 [2021-11-23 02:34:57,762 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 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) [2021-11-23 02:35:00,158 WARN L860 $PredicateComparison]: unable to prove that (and (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-23 02:35:02,540 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (and (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 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1)) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-11-23 02:35:04,811 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (and (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0)) (let ((.cse1 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse0))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse1 .cse0) .cse1)) (fp.eq .cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))))) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-11-23 02:35:07,388 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (and (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse0) |c_ULTIMATE.start_main_~x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0)) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-11-23 02:35:09,999 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (and (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse0)) (or (not (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|)) (fp.eq |c_ULTIMATE.start_main_~x~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (= (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) |c_ULTIMATE.start_main_~x~0#1|) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-11-23 02:35:10,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:10,067 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-11-23 02:35:10,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:35:10,068 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 02:35:10,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:10,068 INFO L225 Difference]: With dead ends: 15 [2021-11-23 02:35:10,068 INFO L226 Difference]: Without dead ends: 11 [2021-11-23 02:35:10,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=37, Invalid=37, Unknown=16, NotChecked=252, Total=342 [2021-11-23 02:35:10,070 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:10,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2021-11-23 02:35:10,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-23 02:35:10,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-23 02:35:10,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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) [2021-11-23 02:35:10,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-11-23 02:35:10,076 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2021-11-23 02:35:10,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:10,076 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-11-23 02:35:10,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 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) [2021-11-23 02:35:10,077 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-11-23 02:35:10,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 02:35:10,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:10,078 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-11-23 02:35:10,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:35:10,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-23 02:35:10,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-23 02:35:10,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:35:10,680 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:10,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:10,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 3 times [2021-11-23 02:35:10,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:35:10,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248070803] [2021-11-23 02:35:10,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:35:10,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:35:10,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:35:10,682 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:35:10,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 02:35:11,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:35:11,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:35:11,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:35:11,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:35:15,531 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~x1~0#1| (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-23 02:35:33,809 WARN L227 SmtUtils]: Spent 8.11s 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) [2021-11-23 02:35:39,289 WARN L227 SmtUtils]: Spent 5.48s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:35:42,228 WARN L860 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (= |c_ULTIMATE.start_main_~x1~0#1| (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) .cse0)))) is different from true [2021-11-23 02:35:50,953 WARN L227 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:35:53,519 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (and (= (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) .cse0) |c_ULTIMATE.start_main_~x~0#1|) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse0)) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-11-23 02:35:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 9 not checked. [2021-11-23 02:35:57,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:36:06,297 WARN L838 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0))) |c_ULTIMATE.start_main_~x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from false [2021-11-23 02:36:08,406 WARN L860 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0))) |c_ULTIMATE.start_main_~x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from true [2021-11-23 02:36:20,316 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) 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 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from false [2021-11-23 02:36:22,538 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) 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 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from true [2021-11-23 02:36:28,035 WARN L227 SmtUtils]: Spent 5.49s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:36:33,252 WARN L227 SmtUtils]: Spent 5.22s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:36:35,578 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) 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 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from false [2021-11-23 02:36:37,916 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) 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 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from true [2021-11-23 02:36:44,373 WARN L227 SmtUtils]: Spent 6.45s on a formula simplification that was a NOOP. DAG size: 10 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:36:50,230 WARN L227 SmtUtils]: Spent 5.86s on a formula simplification that was a NOOP. DAG size: 10 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:36:52,678 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) 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 (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from false [2021-11-23 02:36:55,136 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) 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 (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from true [2021-11-23 02:37:00,901 WARN L227 SmtUtils]: Spent 5.76s on a formula simplification that was a NOOP. DAG size: 12 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:37:06,904 WARN L227 SmtUtils]: Spent 6.00s on a formula simplification that was a NOOP. DAG size: 12 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:37:09,363 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from false [2021-11-23 02:37:11,834 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from true [2021-11-23 02:37:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2021-11-23 02:37:11,835 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:37:11,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248070803] [2021-11-23 02:37:11,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248070803] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:37:11,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [168542205] [2021-11-23 02:37:11,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:37:11,836 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:37:11,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:37:11,836 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:37:11,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 02:37:15,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:37:15,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:37:15,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:37:15,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:37:22,236 WARN L227 SmtUtils]: Spent 5.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:37:27,748 WARN L227 SmtUtils]: Spent 5.51s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:37:35,809 WARN L227 SmtUtils]: Spent 5.97s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:37:40,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 9 not checked. [2021-11-23 02:37:40,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:38:01,999 WARN L227 SmtUtils]: Spent 5.49s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:38:07,202 WARN L227 SmtUtils]: Spent 5.20s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:38:13,606 WARN L227 SmtUtils]: Spent 6.40s on a formula simplification that was a NOOP. DAG size: 10 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:38:19,501 WARN L227 SmtUtils]: Spent 5.89s on a formula simplification that was a NOOP. DAG size: 10 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:38:25,229 WARN L227 SmtUtils]: Spent 5.72s on a formula simplification that was a NOOP. DAG size: 12 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:38:31,223 WARN L227 SmtUtils]: Spent 5.99s on a formula simplification that was a NOOP. DAG size: 12 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:38:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2021-11-23 02:38:31,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [168542205] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:38:31,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675426839] [2021-11-23 02:38:31,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:38:31,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:38:31,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:38:31,232 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:38:31,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9690176f-7714-4290-ac2e-760c9033d3e8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:40:20,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:40:20,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:40:20,845 WARN L261 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:40:20,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:40:35,520 WARN L227 SmtUtils]: Spent 5.45s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:40:37,664 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (and (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse0)) (= (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) |c_ULTIMATE.start_main_~x~0#1|) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-11-23 02:40:47,030 WARN L227 SmtUtils]: Spent 5.96s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:40:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 9 not checked. [2021-11-23 02:40:51,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:41:05,048 WARN L838 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0))) |c_ULTIMATE.start_main_~x1~0#1|)) (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 11 53) c_currentRoundingMode (_ bv0 32)))) is different from false [2021-11-23 02:41:07,162 WARN L860 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0))) |c_ULTIMATE.start_main_~x1~0#1|)) (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 11 53) c_currentRoundingMode (_ bv0 32)))) is different from true [2021-11-23 02:41:22,350 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) 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 11 53) c_currentRoundingMode (_ bv0 32))) (fp.eq .cse0 |c_ULTIMATE.start_main_~x1~0#1|)))) is different from false [2021-11-23 02:41:24,573 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) 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 11 53) c_currentRoundingMode (_ bv0 32))) (fp.eq .cse0 |c_ULTIMATE.start_main_~x1~0#1|)))) is different from true [2021-11-23 02:41:30,056 WARN L227 SmtUtils]: Spent 5.48s on a formula simplification that was a NOOP. DAG size: 7 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:41:35,573 WARN L227 SmtUtils]: Spent 5.51s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:41:40,782 WARN L227 SmtUtils]: Spent 5.21s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:41:43,125 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse1 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse2))) (let ((.cse0 (fp.div c_currentRoundingMode .cse1 .cse2))) (or (fp.eq .cse0 .cse1) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse2) .cse0)))))) is different from false [2021-11-23 02:41:45,459 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse1 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse2))) (let ((.cse0 (fp.div c_currentRoundingMode .cse1 .cse2))) (or (fp.eq .cse0 .cse1) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse2) .cse0)))))) is different from true [2021-11-23 02:41:51,871 WARN L227 SmtUtils]: Spent 6.41s on a formula simplification that was a NOOP. DAG size: 8 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:41:58,275 WARN L227 SmtUtils]: Spent 6.40s on a formula simplification that was a NOOP. DAG size: 10 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:42:04,181 WARN L227 SmtUtils]: Spent 5.90s on a formula simplification that was a NOOP. DAG size: 10 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:42:06,635 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse1 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse2) .cse2))) (let ((.cse0 (fp.div c_currentRoundingMode .cse1 .cse2))) (or (fp.eq .cse0 .cse1) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse2) .cse0)))))) is different from false [2021-11-23 02:42:09,104 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse1 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse2) .cse2))) (let ((.cse0 (fp.div c_currentRoundingMode .cse1 .cse2))) (or (fp.eq .cse0 .cse1) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse2) .cse0)))))) is different from true