./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/inv_sqrt_Quake.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_sqrt_Quake.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b5a9a5f04ffebcbeddfcdcc0054cf362a3fa4d7b ............................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_sqrt_Quake.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b5a9a5f04ffebcbeddfcdcc0054cf362a3fa4d7b ................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:16:48,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:16:48,397 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:16:48,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:16:48,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:16:48,454 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:16:48,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:16:48,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:16:48,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:16:48,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:16:48,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:16:48,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:16:48,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:16:48,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:16:48,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:16:48,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:16:48,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:16:48,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:16:48,501 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:16:48,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:16:48,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:16:48,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:16:48,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:16:48,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:16:48,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:16:48,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:16:48,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:16:48,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:16:48,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:16:48,537 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:16:48,538 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:16:48,539 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:16:48,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:16:48,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:16:48,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:16:48,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:16:48,546 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:16:48,546 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:16:48,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:16:48,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:16:48,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:16:48,550 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-13 00:16:48,604 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:16:48,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:16:48,605 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:16:48,606 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:16:48,607 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:16:48,607 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:16:48,608 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:16:48,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:16:48,608 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:16:48,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:16:48,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:16:48,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:16:48,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 00:16:48,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:16:48,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 00:16:48,611 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:16:48,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:16:48,612 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:16:48,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 00:16:48,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:16:48,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:16:48,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:16:48,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:16:48,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:16:48,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:16:48,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 00:16:48,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:16:48,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:16:48,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 00:16:48,615 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:16:48,615 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b5a9a5f04ffebcbeddfcdcc0054cf362a3fa4d7b [2021-10-13 00:16:48,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:16:48,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:16:48,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:16:48,950 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:16:48,951 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:16:48,952 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/float-benchs/inv_sqrt_Quake.c [2021-10-13 00:16:49,028 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/data/2383bd31d/d4ed5aaf9ee648c2b602d91ff6e64693/FLAGfc17e1b6e [2021-10-13 00:16:49,629 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:16:49,630 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/sv-benchmarks/c/float-benchs/inv_sqrt_Quake.c [2021-10-13 00:16:49,650 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/data/2383bd31d/d4ed5aaf9ee648c2b602d91ff6e64693/FLAGfc17e1b6e [2021-10-13 00:16:49,991 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/data/2383bd31d/d4ed5aaf9ee648c2b602d91ff6e64693 [2021-10-13 00:16:49,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:16:49,997 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:16:49,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:16:50,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:16:50,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:16:50,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:16:49" (1/1) ... [2021-10-13 00:16:50,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@561f3792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:50, skipping insertion in model container [2021-10-13 00:16:50,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:16:49" (1/1) ... [2021-10-13 00:16:50,020 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:16:50,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:16:50,289 WARN L228 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_e2eefc24-4b44-459f-85a0-5b73087e4147/sv-benchmarks/c/float-benchs/inv_sqrt_Quake.c[585,598] [2021-10-13 00:16:50,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:16:50,319 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:16:50,335 WARN L228 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_e2eefc24-4b44-459f-85a0-5b73087e4147/sv-benchmarks/c/float-benchs/inv_sqrt_Quake.c[585,598] [2021-10-13 00:16:50,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:16:50,363 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:16:50,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:50 WrapperNode [2021-10-13 00:16:50,364 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:16:50,365 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:16:50,366 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:16:50,366 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:16:50,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:50" (1/1) ... [2021-10-13 00:16:50,384 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:50" (1/1) ... [2021-10-13 00:16:50,403 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:16:50,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:16:50,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:16:50,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:16:50,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:50" (1/1) ... [2021-10-13 00:16:50,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:50" (1/1) ... [2021-10-13 00:16:50,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:50" (1/1) ... [2021-10-13 00:16:50,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:50" (1/1) ... [2021-10-13 00:16:50,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:50" (1/1) ... [2021-10-13 00:16:50,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:50" (1/1) ... [2021-10-13 00:16:50,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:50" (1/1) ... [2021-10-13 00:16:50,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:16:50,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:16:50,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:16:50,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:16:50,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:50" (1/1) ... [2021-10-13 00:16:50,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:16:50,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:50,489 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:16:50,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:16:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:16:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:16:50,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-10-13 00:16:50,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 00:16:50,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-13 00:16:50,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:16:50,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:16:50,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 00:16:50,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 00:16:50,849 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:16:50,850 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-13 00:16:50,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:16:50 BoogieIcfgContainer [2021-10-13 00:16:50,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:16:50,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:16:50,855 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:16:50,860 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:16:50,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:16:49" (1/3) ... [2021-10-13 00:16:50,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e0bd562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:16:50, skipping insertion in model container [2021-10-13 00:16:50,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:50" (2/3) ... [2021-10-13 00:16:50,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e0bd562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:16:50, skipping insertion in model container [2021-10-13 00:16:50,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:16:50" (3/3) ... [2021-10-13 00:16:50,864 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_sqrt_Quake.c [2021-10-13 00:16:50,871 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:16:50,872 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 00:16:50,947 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:16:50,970 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, mConcurrency=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 [2021-10-13 00:16:50,971 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 00:16:51,017 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.3) internal successors, (13), 11 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) [2021-10-13 00:16:51,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 00:16:51,022 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:51,023 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:51,023 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:51,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:51,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1804965382, now seen corresponding path program 1 times [2021-10-13 00:16:51,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:51,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327571812] [2021-10-13 00:16:51,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:51,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:51,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:51,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327571812] [2021-10-13 00:16:51,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327571812] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:16:51,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:16:51,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 00:16:51,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581332907] [2021-10-13 00:16:51,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 00:16:51,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:51,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 00:16:51,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 00:16:51,361 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.3) internal successors, (13), 11 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 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:51,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:51,382 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-10-13 00:16:51,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 00:16:51,384 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 00:16:51,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:51,396 INFO L225 Difference]: With dead ends: 21 [2021-10-13 00:16:51,396 INFO L226 Difference]: Without dead ends: 8 [2021-10-13 00:16:51,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 00:16:51,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-13 00:16:51,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-13 00:16:51,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:51,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2021-10-13 00:16:51,434 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 7 [2021-10-13 00:16:51,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:51,435 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2021-10-13 00:16:51,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:51,435 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2021-10-13 00:16:51,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 00:16:51,436 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:51,436 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:51,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:16:51,437 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:51,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:51,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1806812424, now seen corresponding path program 1 times [2021-10-13 00:16:51,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:51,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657415881] [2021-10-13 00:16:51,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:51,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:16:51,540 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:16:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:16:51,637 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:16:51,637 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 00:16:51,640 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:16:51,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 00:16:51,650 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:16:51,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:16:51 BoogieIcfgContainer [2021-10-13 00:16:51,686 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:16:51,687 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:16:51,687 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:16:51,688 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:16:51,688 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:16:50" (3/4) ... [2021-10-13 00:16:51,692 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 00:16:51,693 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:16:51,697 INFO L168 Benchmark]: Toolchain (without parser) took 1697.14 ms. Allocated memory was 88.1 MB in the beginning and 109.1 MB in the end (delta: 21.0 MB). Free memory was 51.5 MB in the beginning and 75.8 MB in the end (delta: -24.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:16:51,698 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 88.1 MB. Free memory was 67.9 MB in the beginning and 67.9 MB in the end (delta: 41.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:16:51,701 INFO L168 Benchmark]: CACSL2BoogieTranslator took 364.99 ms. Allocated memory was 88.1 MB in the beginning and 109.1 MB in the end (delta: 21.0 MB). Free memory was 51.3 MB in the beginning and 84.9 MB in the end (delta: -33.6 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. [2021-10-13 00:16:51,702 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.24 ms. Allocated memory is still 109.1 MB. Free memory was 84.9 MB in the beginning and 83.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:16:51,704 INFO L168 Benchmark]: Boogie Preprocessor took 26.87 ms. Allocated memory is still 109.1 MB. Free memory was 83.5 MB in the beginning and 82.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:16:51,705 INFO L168 Benchmark]: RCFGBuilder took 420.69 ms. Allocated memory is still 109.1 MB. Free memory was 82.3 MB in the beginning and 72.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 00:16:51,706 INFO L168 Benchmark]: TraceAbstraction took 831.28 ms. Allocated memory is still 109.1 MB. Free memory was 71.8 MB in the beginning and 76.4 MB in the end (delta: -4.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:16:51,709 INFO L168 Benchmark]: Witness Printer took 6.02 ms. Allocated memory is still 109.1 MB. Free memory was 76.2 MB in the beginning and 75.8 MB in the end (delta: 365.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:16:51,717 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 88.1 MB. Free memory was 67.9 MB in the beginning and 67.9 MB in the end (delta: 41.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 364.99 ms. Allocated memory was 88.1 MB in the beginning and 109.1 MB in the end (delta: 21.0 MB). Free memory was 51.3 MB in the beginning and 84.9 MB in the end (delta: -33.6 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.24 ms. Allocated memory is still 109.1 MB. Free memory was 84.9 MB in the beginning and 83.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.87 ms. Allocated memory is still 109.1 MB. Free memory was 83.5 MB in the beginning and 82.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 420.69 ms. Allocated memory is still 109.1 MB. Free memory was 82.3 MB in the beginning and 72.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 831.28 ms. Allocated memory is still 109.1 MB. Free memory was 71.8 MB in the beginning and 76.4 MB in the end (delta: -4.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 6.02 ms. Allocated memory is still 109.1 MB. Free memory was 76.2 MB in the beginning and 75.8 MB in the end (delta: 365.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 52, overapproximation of someBinaryDOUBLEComparisonOperation at line 52, overapproximation of someBinaryArithmeticFLOAToperation at line 22. Possible FailurePath: [L45] float a,r; [L47] a = __VERIFIER_nondet_float() [L11] COND FALSE !(!cond) [L22] float xhalf = 0.5f*x; [L23] union float_int i; [L24] i.f = x [L25] EXPR i.i [L25] i.i = 0x5f3759df - (i.i>>1) [L26] EXPR i.f [L26] x = i.f [L27] x = x*(1.5f-xhalf*x*x) [L28] return x; [L28] return x; [L50] r = InvSqrt(a) [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 703.2ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 25.4ms, AutomataDifference: 92.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 16.9ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 27.1ms SsaConstructionTime, 140.1ms SatisfiabilityAnalysisTime, 97.1ms InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 00:16:51,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:16:54,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:16:54,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:16:54,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:16:54,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:16:54,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:16:54,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:16:54,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:16:54,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:16:54,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:16:54,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:16:54,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:16:54,576 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:16:54,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:16:54,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:16:54,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:16:54,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:16:54,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:16:54,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:16:54,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:16:54,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:16:54,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:16:54,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:16:54,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:16:54,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:16:54,624 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:16:54,625 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:16:54,626 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:16:54,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:16:54,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:16:54,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:16:54,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:16:54,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:16:54,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:16:54,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:16:54,638 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:16:54,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:16:54,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:16:54,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:16:54,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:16:54,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:16:54,644 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-13 00:16:54,685 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:16:54,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:16:54,686 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:16:54,686 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:16:54,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:16:54,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:16:54,689 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:16:54,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:16:54,690 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:16:54,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:16:54,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:16:54,692 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 00:16:54,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:16:54,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 00:16:54,693 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 00:16:54,693 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 00:16:54,693 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:16:54,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:16:54,694 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:16:54,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 00:16:54,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:16:54,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:16:54,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:16:54,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:16:54,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:16:54,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:16:54,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 00:16:54,696 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 00:16:54,696 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 00:16:54,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 00:16:54,697 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:16:54,697 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 00:16:54,698 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_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b5a9a5f04ffebcbeddfcdcc0054cf362a3fa4d7b [2021-10-13 00:16:55,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:16:55,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:16:55,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:16:55,237 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:16:55,237 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:16:55,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/float-benchs/inv_sqrt_Quake.c [2021-10-13 00:16:55,337 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/data/21ec0b178/04cb3c10b43f40d3ba3159763e66f761/FLAGff1e5f684 [2021-10-13 00:16:55,909 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:16:55,910 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/sv-benchmarks/c/float-benchs/inv_sqrt_Quake.c [2021-10-13 00:16:55,917 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/data/21ec0b178/04cb3c10b43f40d3ba3159763e66f761/FLAGff1e5f684 [2021-10-13 00:16:56,302 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/data/21ec0b178/04cb3c10b43f40d3ba3159763e66f761 [2021-10-13 00:16:56,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:16:56,311 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:16:56,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:16:56,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:16:56,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:16:56,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:16:56" (1/1) ... [2021-10-13 00:16:56,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@566a72c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:56, skipping insertion in model container [2021-10-13 00:16:56,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:16:56" (1/1) ... [2021-10-13 00:16:56,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:16:56,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:16:56,564 WARN L228 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_e2eefc24-4b44-459f-85a0-5b73087e4147/sv-benchmarks/c/float-benchs/inv_sqrt_Quake.c[585,598] [2021-10-13 00:16:56,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:16:56,601 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:16:56,624 WARN L228 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_e2eefc24-4b44-459f-85a0-5b73087e4147/sv-benchmarks/c/float-benchs/inv_sqrt_Quake.c[585,598] [2021-10-13 00:16:56,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:16:56,674 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:16:56,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:56 WrapperNode [2021-10-13 00:16:56,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:16:56,676 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:16:56,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:16:56,677 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:16:56,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:56" (1/1) ... [2021-10-13 00:16:56,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:56" (1/1) ... [2021-10-13 00:16:56,725 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:16:56,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:16:56,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:16:56,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:16:56,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:56" (1/1) ... [2021-10-13 00:16:56,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:56" (1/1) ... [2021-10-13 00:16:56,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:56" (1/1) ... [2021-10-13 00:16:56,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:56" (1/1) ... [2021-10-13 00:16:56,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:56" (1/1) ... [2021-10-13 00:16:56,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:56" (1/1) ... [2021-10-13 00:16:56,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:56" (1/1) ... [2021-10-13 00:16:56,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:16:56,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:16:56,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:16:56,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:16:56,764 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:56" (1/1) ... [2021-10-13 00:16:56,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:16:56,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:56,803 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:16:56,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:16:56,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 00:16:56,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:16:56,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4 [2021-10-13 00:16:56,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 00:16:56,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:16:56,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:16:56,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-10-13 00:16:56,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 00:16:56,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 00:16:59,300 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:16:59,300 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-13 00:16:59,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:16:59 BoogieIcfgContainer [2021-10-13 00:16:59,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:16:59,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:16:59,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:16:59,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:16:59,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:16:56" (1/3) ... [2021-10-13 00:16:59,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e474ae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:16:59, skipping insertion in model container [2021-10-13 00:16:59,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:16:56" (2/3) ... [2021-10-13 00:16:59,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e474ae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:16:59, skipping insertion in model container [2021-10-13 00:16:59,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:16:59" (3/3) ... [2021-10-13 00:16:59,313 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_sqrt_Quake.c [2021-10-13 00:16:59,319 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:16:59,319 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 00:16:59,375 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:16:59,383 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, mConcurrency=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 [2021-10-13 00:16:59,383 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 00:16:59,399 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.3) internal successors, (13), 11 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) [2021-10-13 00:16:59,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 00:16:59,405 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:59,406 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:59,406 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:59,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:59,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1804965382, now seen corresponding path program 1 times [2021-10-13 00:16:59,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:16:59,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113437146] [2021-10-13 00:16:59,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:59,430 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:16:59,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:16:59,440 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:16:59,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 00:16:59,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:59,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 00:16:59,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:59,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:16:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:59,924 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:16:59,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113437146] [2021-10-13 00:16:59,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113437146] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:16:59,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:16:59,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 00:16:59,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509030042] [2021-10-13 00:16:59,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 00:16:59,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:16:59,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 00:16:59,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 00:16:59,956 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.3) internal successors, (13), 11 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 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:59,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:59,972 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-10-13 00:16:59,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 00:16:59,974 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 00:16:59,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:59,983 INFO L225 Difference]: With dead ends: 21 [2021-10-13 00:16:59,983 INFO L226 Difference]: Without dead ends: 8 [2021-10-13 00:16:59,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 00:17:00,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-13 00:17:00,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-13 00:17:00,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:00,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2021-10-13 00:17:00,020 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 7 [2021-10-13 00:17:00,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:00,021 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2021-10-13 00:17:00,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:00,021 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2021-10-13 00:17:00,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 00:17:00,022 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:00,022 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:00,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:17:00,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:17:00,237 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:17:00,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:00,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1806812424, now seen corresponding path program 1 times [2021-10-13 00:17:00,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:17:00,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899924975] [2021-10-13 00:17:00,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:00,240 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:17:00,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:17:00,242 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:17:00,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 00:17:03,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:03,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 00:17:03,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:17:18,210 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_skolemized_q#valueAsBitvector_3| (_ BitVec 32))) (let ((.cse0 (fp ((_ extract 31 31) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 30 23) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 22 0) |v_skolemized_q#valueAsBitvector_3|)))) (and (fp.leq .cse0 ((_ to_fp 8 24) c_currentRoundingMode 100.0)) (fp.geq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 10.0))) (= (let ((.cse1 (let ((.cse2 (bvadd (_ bv1597463007 32) (bvneg (bvashr |v_skolemized_q#valueAsBitvector_3| (_ bv1 32)))))) (fp ((_ extract 31 31) .cse2) ((_ extract 30 23) .cse2) ((_ extract 22 0) .cse2))))) (fp.mul c_currentRoundingMode .cse1 (fp.sub c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) .cse0) .cse1) .cse1)))) |c_ULTIMATE.start_InvSqrt_#res|)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-10-13 00:18:59,429 WARN L838 $PredicateComparison]: unable to prove that (exists ((|v_skolemized_q#valueAsBitvector_3| (_ BitVec 32))) (let ((.cse0 (fp ((_ extract 31 31) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 30 23) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 22 0) |v_skolemized_q#valueAsBitvector_3|)))) (and (fp.geq .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 10.0))) (fp.leq .cse0 ((_ to_fp 8 24) roundNearestTiesToEven 100.0)) (let ((.cse3 (let ((.cse4 (let ((.cse5 (bvadd (_ bv1597463007 32) (bvneg (bvashr |v_skolemized_q#valueAsBitvector_3| (_ bv1 32)))))) (fp ((_ extract 31 31) .cse5) ((_ extract 30 23) .cse5) ((_ extract 22 0) .cse5))))) (fp.mul roundNearestTiesToEven .cse4 (fp.sub roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) .cse0) .cse4) .cse4)))))) (let ((.cse1 (fp.leq ((_ to_fp 11 53) roundNearestTiesToEven .cse3) ((_ to_fp 11 53) roundNearestTiesToEven 10.0))) (.cse2 (fp.geq .cse3 (_ +zero 8 24)))) (or (and (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)) (or (not .cse1) (not .cse2))) (and .cse1 .cse2 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))))))))) is different from false [2021-10-13 00:19:01,464 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_skolemized_q#valueAsBitvector_3| (_ BitVec 32))) (let ((.cse0 (fp ((_ extract 31 31) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 30 23) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 22 0) |v_skolemized_q#valueAsBitvector_3|)))) (and (fp.geq .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 10.0))) (fp.leq .cse0 ((_ to_fp 8 24) roundNearestTiesToEven 100.0)) (let ((.cse3 (let ((.cse4 (let ((.cse5 (bvadd (_ bv1597463007 32) (bvneg (bvashr |v_skolemized_q#valueAsBitvector_3| (_ bv1 32)))))) (fp ((_ extract 31 31) .cse5) ((_ extract 30 23) .cse5) ((_ extract 22 0) .cse5))))) (fp.mul roundNearestTiesToEven .cse4 (fp.sub roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) .cse0) .cse4) .cse4)))))) (let ((.cse1 (fp.leq ((_ to_fp 11 53) roundNearestTiesToEven .cse3) ((_ to_fp 11 53) roundNearestTiesToEven 10.0))) (.cse2 (fp.geq .cse3 (_ +zero 8 24)))) (or (and (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)) (or (not .cse1) (not .cse2))) (and .cse1 .cse2 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))))))))) is different from true [2021-10-13 00:19:50,915 WARN L838 $PredicateComparison]: unable to prove that (exists ((|v_skolemized_q#valueAsBitvector_3| (_ BitVec 32))) (let ((.cse2 (fp ((_ extract 31 31) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 30 23) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 22 0) |v_skolemized_q#valueAsBitvector_3|)))) (and (let ((.cse0 (let ((.cse1 (let ((.cse3 (bvadd (_ bv1597463007 32) (bvneg (bvashr |v_skolemized_q#valueAsBitvector_3| (_ bv1 32)))))) (fp ((_ extract 31 31) .cse3) ((_ extract 30 23) .cse3) ((_ extract 22 0) .cse3))))) (fp.mul roundNearestTiesToEven .cse1 (fp.sub roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) .cse2) .cse1) .cse1)))))) (or (not (fp.leq ((_ to_fp 11 53) roundNearestTiesToEven .cse0) ((_ to_fp 11 53) roundNearestTiesToEven 10.0))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.geq .cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 10.0))) (fp.leq .cse2 ((_ to_fp 8 24) roundNearestTiesToEven 100.0))))) is different from false [2021-10-13 00:19:52,948 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_skolemized_q#valueAsBitvector_3| (_ BitVec 32))) (let ((.cse2 (fp ((_ extract 31 31) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 30 23) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 22 0) |v_skolemized_q#valueAsBitvector_3|)))) (and (let ((.cse0 (let ((.cse1 (let ((.cse3 (bvadd (_ bv1597463007 32) (bvneg (bvashr |v_skolemized_q#valueAsBitvector_3| (_ bv1 32)))))) (fp ((_ extract 31 31) .cse3) ((_ extract 30 23) .cse3) ((_ extract 22 0) .cse3))))) (fp.mul roundNearestTiesToEven .cse1 (fp.sub roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) .cse2) .cse1) .cse1)))))) (or (not (fp.leq ((_ to_fp 11 53) roundNearestTiesToEven .cse0) ((_ to_fp 11 53) roundNearestTiesToEven 10.0))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.geq .cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 10.0))) (fp.leq .cse2 ((_ to_fp 8 24) roundNearestTiesToEven 100.0))))) is different from true [2021-10-13 00:19:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:52,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:20:28,519 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-10-13 00:20:28,520 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:20:28,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899924975] [2021-10-13 00:20:28,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-10-13 00:20:28,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [487337043] [2021-10-13 00:20:28,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:20:28,522 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 00:20:28,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/cvc4 [2021-10-13 00:20:28,530 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 00:20:28,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-10-13 00:20:28,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-10-13 00:20:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:29,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 00:20:29,477 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@43efdded [2021-10-13 00:20:29,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486388490] [2021-10-13 00:20:29,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:20:29,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:20:29,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:20:29,486 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:20:29,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 00:21:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:21:16,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 00:21:16,189 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@43efdded [2021-10-13 00:21:16,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:21:16,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 00:21:16,190 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-10-13 00:21:16,195 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 00:21:16,204 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:21:16,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:21:16,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:21:16,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-13 00:21:16,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2eefc24-4b44-459f-85a0-5b73087e4147/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:21:16,814 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:21:16,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:21:16 BoogieIcfgContainer [2021-10-13 00:21:16,826 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:21:16,827 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:21:16,827 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:21:16,827 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:21:16,828 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:16:59" (3/4) ... [2021-10-13 00:21:16,831 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 00:21:16,831 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:21:16,832 INFO L168 Benchmark]: Toolchain (without parser) took 260520.43 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.8 MB in the beginning and 39.2 MB in the end (delta: -12.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:21:16,833 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 50.3 MB. Free memory is still 31.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:21:16,834 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.36 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.6 MB in the beginning and 43.1 MB in the end (delta: -16.5 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:21:16,835 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.60 ms. Allocated memory is still 60.8 MB. Free memory was 43.1 MB in the beginning and 41.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:21:16,835 INFO L168 Benchmark]: Boogie Preprocessor took 36.08 ms. Allocated memory is still 60.8 MB. Free memory was 41.4 MB in the beginning and 40.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:21:16,836 INFO L168 Benchmark]: RCFGBuilder took 2540.26 ms. Allocated memory is still 60.8 MB. Free memory was 40.1 MB in the beginning and 40.8 MB in the end (delta: -697.0 kB). Peak memory consumption was 12.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:21:16,837 INFO L168 Benchmark]: TraceAbstraction took 257521.09 ms. Allocated memory is still 60.8 MB. Free memory was 40.4 MB in the beginning and 39.7 MB in the end (delta: 658.0 kB). Peak memory consumption was 16.5 MB. Max. memory is 16.1 GB. [2021-10-13 00:21:16,838 INFO L168 Benchmark]: Witness Printer took 4.25 ms. Allocated memory is still 60.8 MB. Free memory was 39.7 MB in the beginning and 39.2 MB in the end (delta: 494.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:21:16,842 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 50.3 MB. Free memory is still 31.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 360.36 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.6 MB in the beginning and 43.1 MB in the end (delta: -16.5 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.60 ms. Allocated memory is still 60.8 MB. Free memory was 43.1 MB in the beginning and 41.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.08 ms. Allocated memory is still 60.8 MB. Free memory was 41.4 MB in the beginning and 40.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2540.26 ms. Allocated memory is still 60.8 MB. Free memory was 40.1 MB in the beginning and 40.8 MB in the end (delta: -697.0 kB). Peak memory consumption was 12.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 257521.09 ms. Allocated memory is still 60.8 MB. Free memory was 40.4 MB in the beginning and 39.7 MB in the end (delta: 658.0 kB). Peak memory consumption was 16.5 MB. Max. memory is 16.1 GB. * Witness Printer took 4.25 ms. Allocated memory is still 60.8 MB. Free memory was 39.7 MB in the beginning and 39.2 MB in the end (delta: 494.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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: unable to decide satisfiability of path constraint. Possible FailurePath: [L45] float a,r; [L47] a = __VERIFIER_nondet_float() [L11] COND FALSE !(!cond) [L22] float xhalf = 0.5f*x; [L23] union float_int i; [L24] i.f = x [L25] EXPR i.i [L25] i.i = 0x5f3759df - (i.i>>1) [L26] EXPR i.f [L26] x = i.f [L27] x = x*(1.5f-xhalf*x*x) [L28] return x; [L28] return x; [L50] r = InvSqrt(a) [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 257439.0ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 11.7ms, AutomataDifference: 49.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 17.3ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 17.3ms SsaConstructionTime, 274.3ms SatisfiabilityAnalysisTime, 142.2ms InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 12 SizeOfPredicates, 0 NumberOfNonLiveVariables, 43 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 Received shutdown request...