./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU --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 3bb1d9e312234d5c4f7ead2dcb51cc43e4ff3aebeffef1b0758f6a0d5be2ea9b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:55:49,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:55:49,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:55:49,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:55:49,138 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:55:49,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:55:49,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:55:49,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:55:49,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:55:49,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:55:49,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:55:49,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:55:49,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:55:49,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:55:49,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:55:49,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:55:49,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:55:49,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:55:49,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:55:49,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:55:49,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:55:49,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:55:49,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:55:49,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:55:49,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:55:49,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:55:49,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:55:49,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:55:49,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:55:49,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:55:49,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:55:49,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:55:49,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:55:49,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:55:49,199 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:55:49,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:55:49,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:55:49,203 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:55:49,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:55:49,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:55:49,206 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:55:49,207 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:55:49,240 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:55:49,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:55:49,242 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:55:49,242 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:55:49,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:55:49,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:55:49,245 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:55:49,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:55:49,246 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:55:49,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:55:49,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:55:49,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:55:49,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:55:49,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:55:49,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:55:49,250 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:55:49,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:55:49,251 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:55:49,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:55:49,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:55:49,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:55:49,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:55:49,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:55:49,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:55:49,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:55:49,254 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:55:49,255 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:55:49,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:55:49,255 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:55:49,256 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:55:49,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:55:49,256 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:55:49,257 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_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bb1d9e312234d5c4f7ead2dcb51cc43e4ff3aebeffef1b0758f6a0d5be2ea9b [2021-11-02 22:55:49,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:55:49,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:55:49,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:55:49,607 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:55:49,608 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:55:49,609 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2021-11-02 22:55:49,697 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/data/99a7fb486/4cc4882dc38241afa62fb85d3cbce9b5/FLAG26d0ab2ce [2021-11-02 22:55:50,331 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:55:50,332 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2021-11-02 22:55:50,341 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/data/99a7fb486/4cc4882dc38241afa62fb85d3cbce9b5/FLAG26d0ab2ce [2021-11-02 22:55:50,722 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/data/99a7fb486/4cc4882dc38241afa62fb85d3cbce9b5 [2021-11-02 22:55:50,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:55:50,727 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:55:50,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:55:50,733 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:55:50,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:55:50,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:55:50" (1/1) ... [2021-11-02 22:55:50,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69f153b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:50, skipping insertion in model container [2021-11-02 22:55:50,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:55:50" (1/1) ... [2021-11-02 22:55:50,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:55:50,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:55:51,025 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_51c88eb7-28dc-4993-90e5-105dd9402d20/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c[831,844] [2021-11-02 22:55:51,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:55:51,074 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:55:51,089 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_51c88eb7-28dc-4993-90e5-105dd9402d20/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c[831,844] [2021-11-02 22:55:51,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:55:51,117 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:55:51,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:51 WrapperNode [2021-11-02 22:55:51,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:55:51,119 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:55:51,120 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:55:51,120 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:55:51,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:51" (1/1) ... [2021-11-02 22:55:51,137 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:51" (1/1) ... [2021-11-02 22:55:51,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:55:51,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:55:51,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:55:51,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:55:51,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:51" (1/1) ... [2021-11-02 22:55:51,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:51" (1/1) ... [2021-11-02 22:55:51,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:51" (1/1) ... [2021-11-02 22:55:51,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:51" (1/1) ... [2021-11-02 22:55:51,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:51" (1/1) ... [2021-11-02 22:55:51,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:51" (1/1) ... [2021-11-02 22:55:51,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:51" (1/1) ... [2021-11-02 22:55:51,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:55:51,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:55:51,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:55:51,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:55:51,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:51" (1/1) ... [2021-11-02 22:55:51,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:55:51,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:55:51,245 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:55:51,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:55:51,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:55:51,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:55:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:55:51,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:55:51,562 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:55:51,562 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-02 22:55:51,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:55:51 BoogieIcfgContainer [2021-11-02 22:55:51,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:55:51,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:55:51,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:55:51,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:55:51,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:55:50" (1/3) ... [2021-11-02 22:55:51,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c96f9d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:55:51, skipping insertion in model container [2021-11-02 22:55:51,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:51" (2/3) ... [2021-11-02 22:55:51,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c96f9d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:55:51, skipping insertion in model container [2021-11-02 22:55:51,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:55:51" (3/3) ... [2021-11-02 22:55:51,576 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_interval.c [2021-11-02 22:55:51,581 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:55:51,582 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:55:51,638 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:55:51,647 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:55:51,647 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:55:51,666 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:51,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:55:51,672 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:51,673 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:51,674 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:55:51,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:51,694 INFO L85 PathProgramCache]: Analyzing trace with hash 334453616, now seen corresponding path program 1 times [2021-11-02 22:55:51,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:51,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484399341] [2021-11-02 22:55:51,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:51,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:51,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:51,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484399341] [2021-11-02 22:55:51,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484399341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:51,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:51,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:55:51,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838854783] [2021-11-02 22:55:51,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:55:51,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:52,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:55:52,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:55:52,019 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:52,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:52,041 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-11-02 22:55:52,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:55:52,043 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-02 22:55:52,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:52,054 INFO L225 Difference]: With dead ends: 29 [2021-11-02 22:55:52,054 INFO L226 Difference]: Without dead ends: 12 [2021-11-02 22:55:52,058 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:55:52,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-02 22:55:52,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-02 22:55:52,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) 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) [2021-11-02 22:55:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-02 22:55:52,097 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 11 [2021-11-02 22:55:52,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:52,099 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-02 22:55:52,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:52,100 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-02 22:55:52,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:55:52,102 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:52,103 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:52,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:55:52,104 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:55:52,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:52,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1014511986, now seen corresponding path program 1 times [2021-11-02 22:55:52,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:52,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490615201] [2021-11-02 22:55:52,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:52,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:55:52,193 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:55:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:55:52,246 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:55:52,247 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-02 22:55:52,249 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-02 22:55:52,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:55:52,255 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-02 22:55:52,259 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-02 22:55:52,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 10:55:52 BoogieIcfgContainer [2021-11-02 22:55:52,298 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-02 22:55:52,298 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-02 22:55:52,299 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-02 22:55:52,299 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-02 22:55:52,299 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:55:51" (3/4) ... [2021-11-02 22:55:52,302 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-02 22:55:52,302 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-02 22:55:52,304 INFO L168 Benchmark]: Toolchain (without parser) took 1576.44 ms. Allocated memory was 109.1 MB in the beginning and 140.5 MB in the end (delta: 31.5 MB). Free memory was 79.8 MB in the beginning and 78.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 30.3 MB. Max. memory is 16.1 GB. [2021-11-02 22:55:52,305 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 109.1 MB. Free memory is still 64.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:55:52,305 INFO L168 Benchmark]: CACSL2BoogieTranslator took 386.39 ms. Allocated memory was 109.1 MB in the beginning and 140.5 MB in the end (delta: 31.5 MB). Free memory was 79.4 MB in the beginning and 115.5 MB in the end (delta: -36.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-02 22:55:52,306 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.52 ms. Allocated memory is still 140.5 MB. Free memory was 115.5 MB in the beginning and 113.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:55:52,307 INFO L168 Benchmark]: Boogie Preprocessor took 32.45 ms. Allocated memory is still 140.5 MB. Free memory was 113.9 MB in the beginning and 112.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:55:52,307 INFO L168 Benchmark]: RCFGBuilder took 368.56 ms. Allocated memory is still 140.5 MB. Free memory was 112.5 MB in the beginning and 102.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-02 22:55:52,308 INFO L168 Benchmark]: TraceAbstraction took 730.45 ms. Allocated memory is still 140.5 MB. Free memory was 102.0 MB in the beginning and 79.0 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:55:52,309 INFO L168 Benchmark]: Witness Printer took 4.14 ms. Allocated memory is still 140.5 MB. Free memory was 79.0 MB in the beginning and 78.4 MB in the end (delta: 579.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:55:52,314 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 109.1 MB. Free memory is still 64.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 386.39 ms. Allocated memory was 109.1 MB in the beginning and 140.5 MB in the end (delta: 31.5 MB). Free memory was 79.4 MB in the beginning and 115.5 MB in the end (delta: -36.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.52 ms. Allocated memory is still 140.5 MB. Free memory was 115.5 MB in the beginning and 113.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.45 ms. Allocated memory is still 140.5 MB. Free memory was 113.9 MB in the beginning and 112.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 368.56 ms. Allocated memory is still 140.5 MB. Free memory was 112.5 MB in the beginning and 102.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 730.45 ms. Allocated memory is still 140.5 MB. Free memory was 102.0 MB in the beginning and 79.0 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * Witness Printer took 4.14 ms. Allocated memory is still 140.5 MB. Free memory was 79.0 MB in the beginning and 78.4 MB in the end (delta: 579.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 56, overapproximation of someUnaryDOUBLEoperation at line 32, overapproximation of someBinaryArithmeticDOUBLEoperation at line 44. Possible FailurePath: [L22] double _EPS = 1e-6; VAL [_EPS=1/1000000] [L49] double d, r; [L51] d = __VERIFIER_nondet_double() [L18] COND FALSE !(!cond) VAL [_EPS=1/1000000] [L26] double xn, xnp1, residu, lsup, linf; [L27] int i, cond; VAL [_EPS=1/1000000] [L28] COND TRUE Input <= 1.0 [L28] xn = 1.0 VAL [_EPS=1/1000000] [L29] xnp1 = xn [L30] residu = 2.0*_EPS*(xn+xnp1) [L31] lsup = _EPS * (xn+xnp1) [L32] linf = -lsup [L33] cond = ((residu > lsup) || (residu < linf)) [L34] i = 0 VAL [_EPS=1/1000000] [L35] COND FALSE !(\read(cond)) VAL [_EPS=1/1000000] [L44] return 1.0 / xnp1; VAL [_EPS=1/1000000] [L54] r = SqrtR(d) [L20] COND TRUE !(cond) VAL [_EPS=1/1000000] [L20] reach_error() VAL [_EPS=1/1000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 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 [2021-11-02 22:55:52,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU --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 3bb1d9e312234d5c4f7ead2dcb51cc43e4ff3aebeffef1b0758f6a0d5be2ea9b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:55:55,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:55:55,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:55:55,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:55:55,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:55:55,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:55:55,510 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:55:55,513 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:55:55,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:55:55,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:55:55,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:55:55,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:55:55,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:55:55,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:55:55,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:55:55,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:55:55,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:55:55,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:55:55,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:55:55,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:55:55,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:55:55,545 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:55:55,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:55:55,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:55:55,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:55:55,564 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:55:55,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:55:55,567 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:55:55,569 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:55:55,570 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:55:55,571 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:55:55,572 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:55:55,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:55:55,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:55:55,581 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:55:55,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:55:55,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:55:55,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:55:55,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:55:55,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:55:55,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:55:55,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-02 22:55:55,626 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:55:55,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:55:55,633 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:55:55,633 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:55:55,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:55:55,635 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:55:55,635 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:55:55,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:55:55,636 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:55:55,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:55:55,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:55:55,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:55:55,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:55:55,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:55:55,638 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-02 22:55:55,638 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-02 22:55:55,638 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:55:55,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:55:55,639 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:55:55,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:55:55,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:55:55,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:55:55,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:55:55,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:55:55,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:55:55,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:55:55,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:55:55,641 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-02 22:55:55,642 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-02 22:55:55,642 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:55:55,642 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:55:55,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:55:55,643 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:55:55,643 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-02 22:55:55,643 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_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bb1d9e312234d5c4f7ead2dcb51cc43e4ff3aebeffef1b0758f6a0d5be2ea9b [2021-11-02 22:55:56,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:55:56,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:55:56,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:55:56,137 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:55:56,141 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:55:56,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2021-11-02 22:55:56,236 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/data/f895991f0/5a3faed451d04bfa8a82b70e1156cc78/FLAG5795a8bd5 [2021-11-02 22:55:56,907 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:55:56,908 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2021-11-02 22:55:56,919 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/data/f895991f0/5a3faed451d04bfa8a82b70e1156cc78/FLAG5795a8bd5 [2021-11-02 22:55:57,228 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/data/f895991f0/5a3faed451d04bfa8a82b70e1156cc78 [2021-11-02 22:55:57,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:55:57,233 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:55:57,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:55:57,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:55:57,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:55:57,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:55:57" (1/1) ... [2021-11-02 22:55:57,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ce9707f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:57, skipping insertion in model container [2021-11-02 22:55:57,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:55:57" (1/1) ... [2021-11-02 22:55:57,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:55:57,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:55:57,450 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_51c88eb7-28dc-4993-90e5-105dd9402d20/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c[831,844] [2021-11-02 22:55:57,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:55:57,490 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:55:57,507 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_51c88eb7-28dc-4993-90e5-105dd9402d20/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c[831,844] [2021-11-02 22:55:57,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:55:57,538 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:55:57,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:57 WrapperNode [2021-11-02 22:55:57,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:55:57,541 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:55:57,541 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:55:57,541 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:55:57,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:57" (1/1) ... [2021-11-02 22:55:57,597 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:57" (1/1) ... [2021-11-02 22:55:57,646 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:55:57,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:55:57,650 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:55:57,650 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:55:57,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:57" (1/1) ... [2021-11-02 22:55:57,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:57" (1/1) ... [2021-11-02 22:55:57,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:57" (1/1) ... [2021-11-02 22:55:57,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:57" (1/1) ... [2021-11-02 22:55:57,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:57" (1/1) ... [2021-11-02 22:55:57,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:57" (1/1) ... [2021-11-02 22:55:57,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:57" (1/1) ... [2021-11-02 22:55:57,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:55:57,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:55:57,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:55:57,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:55:57,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:57" (1/1) ... [2021-11-02 22:55:57,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:55:57,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:55:57,775 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:55:57,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:55:57,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-02 22:55:57,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:55:57,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:55:57,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:56:06,188 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:56:06,189 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-02 22:56:06,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:56:06 BoogieIcfgContainer [2021-11-02 22:56:06,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:56:06,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:56:06,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:56:06,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:56:06,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:55:57" (1/3) ... [2021-11-02 22:56:06,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3236de8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:56:06, skipping insertion in model container [2021-11-02 22:56:06,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:57" (2/3) ... [2021-11-02 22:56:06,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3236de8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:56:06, skipping insertion in model container [2021-11-02 22:56:06,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:56:06" (3/3) ... [2021-11-02 22:56:06,203 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_interval.c [2021-11-02 22:56:06,210 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:56:06,210 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:56:06,267 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:56:06,276 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:56:06,277 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:56:06,293 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:56:06,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:56:06,300 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:56:06,300 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:56:06,301 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:56:06,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:56:06,308 INFO L85 PathProgramCache]: Analyzing trace with hash 334453616, now seen corresponding path program 1 times [2021-11-02 22:56:06,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:56:06,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051840729] [2021-11-02 22:56:06,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:06,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:56:06,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:56:06,351 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:56:06,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-02 22:56:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:08,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-02 22:56:08,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:08,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:56:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:08,607 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:56:08,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051840729] [2021-11-02 22:56:08,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051840729] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:56:08,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:56:08,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-02 22:56:08,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717864080] [2021-11-02 22:56:08,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:56:08,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:56:08,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:56:08,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:56:08,640 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:56:08,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:56:08,658 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-11-02 22:56:08,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:56:08,660 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-02 22:56:08,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:56:08,671 INFO L225 Difference]: With dead ends: 29 [2021-11-02 22:56:08,671 INFO L226 Difference]: Without dead ends: 12 [2021-11-02 22:56:08,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:56:08,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-02 22:56:08,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-02 22:56:08,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) 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) [2021-11-02 22:56:08,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-02 22:56:08,713 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 11 [2021-11-02 22:56:08,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:56:08,713 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-02 22:56:08,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:56:08,714 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-02 22:56:08,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:56:08,715 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:56:08,715 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:56:08,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:56:08,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:56:08,929 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:56:08,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:56:08,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1014511986, now seen corresponding path program 1 times [2021-11-02 22:56:08,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:56:08,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661007064] [2021-11-02 22:56:08,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:08,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:56:08,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:56:08,934 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:56:08,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-02 22:56:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:10,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:56:10,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:12,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:56:22,904 WARN L838 $PredicateComparison]: unable to prove that (or (let ((.cse0 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0))) (fp.gt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) .cse0) (fp.mul c_currentRoundingMode c_~_EPS~0 .cse0))) (forall ((v_ULTIMATE.start_SqrtR_~linf~0_7 (_ FloatingPoint 11 53))) (fp.lt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0)) v_ULTIMATE.start_SqrtR_~linf~0_7))) is different from false [2021-11-02 22:56:24,989 WARN L860 $PredicateComparison]: unable to prove that (or (let ((.cse0 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0))) (fp.gt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) .cse0) (fp.mul c_currentRoundingMode c_~_EPS~0 .cse0))) (forall ((v_ULTIMATE.start_SqrtR_~linf~0_7 (_ FloatingPoint 11 53))) (fp.lt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0)) v_ULTIMATE.start_SqrtR_~linf~0_7))) is different from true [2021-11-02 22:56:30,675 WARN L860 $PredicateComparison]: unable to prove that (or (let ((.cse0 (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (fp.add c_currentRoundingMode .cse1 .cse1)))) (fp.gt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) .cse0) (fp.mul c_currentRoundingMode c_~_EPS~0 .cse0))) (forall ((v_ULTIMATE.start_SqrtR_~linf~0_7 (_ FloatingPoint 11 53))) (fp.lt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (fp.add c_currentRoundingMode .cse2 .cse2))) v_ULTIMATE.start_SqrtR_~linf~0_7))) is different from true [2021-11-02 22:56:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:40,208 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:56:40,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661007064] [2021-11-02 22:56:40,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661007064] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:56:40,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:56:40,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-02 22:56:40,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141421680] [2021-11-02 22:56:40,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:56:40,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:56:40,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:56:40,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=20, Unknown=3, NotChecked=18, Total=56 [2021-11-02 22:56:40,225 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:56:43,744 WARN L860 $PredicateComparison]: unable to prove that (and (or (let ((.cse0 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0))) (fp.gt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) .cse0) (fp.mul c_currentRoundingMode c_~_EPS~0 .cse0))) (forall ((v_ULTIMATE.start_SqrtR_~linf~0_7 (_ FloatingPoint 11 53))) (fp.lt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0)) v_ULTIMATE.start_SqrtR_~linf~0_7))) (= c_~_EPS~0 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (= c_currentRoundingMode roundNearestTiesToEven) (= c_ULTIMATE.start_SqrtR_~xn~0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-02 22:56:54,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:56:54,209 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-11-02 22:56:54,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:56:54,211 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-02 22:56:54,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:56:54,212 INFO L225 Difference]: With dead ends: 19 [2021-11-02 22:56:54,212 INFO L226 Difference]: Without dead ends: 14 [2021-11-02 22:56:54,214 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=17, Invalid=21, Unknown=4, NotChecked=30, Total=72 [2021-11-02 22:56:54,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-02 22:56:54,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-02 22:56:54,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:56:54,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-11-02 22:56:54,221 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-11-02 22:56:54,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:56:54,222 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-11-02 22:56:54,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:56:54,223 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-11-02 22:56:54,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:56:54,224 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:56:54,225 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:56:54,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:56:54,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:56:54,440 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:56:54,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:56:54,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1505447948, now seen corresponding path program 1 times [2021-11-02 22:56:54,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:56:54,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925800383] [2021-11-02 22:56:54,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:54,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:56:54,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:56:54,444 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:56:54,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-02 22:57:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:01,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:57:01,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:57:19,332 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse0)) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode 20.0)) (= (fp.div c_currentRoundingMode .cse0 ULTIMATE.start_SqrtR_~Input) c_ULTIMATE.start_SqrtR_~xn~0)))) (= c_~_EPS~0 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-02 22:57:52,758 WARN L207 SmtUtils]: Spent 5.15 s on a formula simplification that was a NOOP. DAG size: 6 [2021-11-02 22:57:57,899 WARN L207 SmtUtils]: Spent 5.14 s on a formula simplification that was a NOOP. DAG size: 5 [2021-11-02 22:58:04,503 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse4 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse5 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0))) (let ((.cse2 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse4) .cse5)) (.cse3 (fp.mul c_currentRoundingMode .cse4 .cse5))) (let ((.cse0 (fp.gt .cse2 .cse3)) (.cse1 (fp.lt .cse2 (fp.neg .cse3)))) (or (and (not .cse0) (not .cse1) (= c_ULTIMATE.start_SqrtR_~cond~0 (_ bv0 32))) (and (= c_ULTIMATE.start_SqrtR_~cond~0 (_ bv1 32)) (or .cse0 .cse1)))))) (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse6 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (= (fp.div c_currentRoundingMode .cse6 ULTIMATE.start_SqrtR_~Input) c_ULTIMATE.start_SqrtR_~xnp1~0) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse6)) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode 20.0))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-02 22:58:06,602 WARN L860 $PredicateComparison]: unable to prove that (and (let ((.cse4 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse5 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0))) (let ((.cse2 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse4) .cse5)) (.cse3 (fp.mul c_currentRoundingMode .cse4 .cse5))) (let ((.cse0 (fp.gt .cse2 .cse3)) (.cse1 (fp.lt .cse2 (fp.neg .cse3)))) (or (and (not .cse0) (not .cse1) (= c_ULTIMATE.start_SqrtR_~cond~0 (_ bv0 32))) (and (= c_ULTIMATE.start_SqrtR_~cond~0 (_ bv1 32)) (or .cse0 .cse1)))))) (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse6 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (= (fp.div c_currentRoundingMode .cse6 ULTIMATE.start_SqrtR_~Input) c_ULTIMATE.start_SqrtR_~xnp1~0) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse6)) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode 20.0))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-02 22:58:16,347 WARN L207 SmtUtils]: Spent 5.16 s on a formula simplification that was a NOOP. DAG size: 6 [2021-11-02 22:58:21,438 WARN L207 SmtUtils]: Spent 5.09 s on a formula simplification that was a NOOP. DAG size: 5 [2021-11-02 22:58:35,305 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse4 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0))) (let ((.cse1 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse3) .cse4)) (.cse2 (fp.mul c_currentRoundingMode .cse3 .cse4))) (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (= (fp.div c_currentRoundingMode .cse0 ULTIMATE.start_SqrtR_~Input) c_ULTIMATE.start_SqrtR_~xnp1~0) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse0)) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode 20.0))))) (= c_currentRoundingMode roundNearestTiesToEven) (not (fp.gt .cse1 .cse2)) (not (fp.lt .cse1 (fp.neg .cse2)))))) is different from false [2021-11-02 22:58:37,400 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse4 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0))) (let ((.cse1 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse3) .cse4)) (.cse2 (fp.mul c_currentRoundingMode .cse3 .cse4))) (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (= (fp.div c_currentRoundingMode .cse0 ULTIMATE.start_SqrtR_~Input) c_ULTIMATE.start_SqrtR_~xnp1~0) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse0)) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode 20.0))))) (= c_currentRoundingMode roundNearestTiesToEven) (not (fp.gt .cse1 .cse2)) (not (fp.lt .cse1 (fp.neg .cse2)))))) is different from true [2021-11-02 22:58:43,636 WARN L207 SmtUtils]: Spent 6.22 s on a formula simplification that was a NOOP. DAG size: 15 [2021-11-02 22:58:49,805 WARN L207 SmtUtils]: Spent 6.17 s on a formula simplification that was a NOOP. DAG size: 16 [2021-11-02 22:58:55,898 WARN L207 SmtUtils]: Spent 6.09 s on a formula simplification that was a NOOP. DAG size: 6 [2021-11-02 22:59:02,107 WARN L207 SmtUtils]: Spent 6.21 s on a formula simplification that was a NOOP. DAG size: 5 [2021-11-02 22:59:07,682 WARN L207 SmtUtils]: Spent 5.57 s on a formula simplification that was a NOOP. DAG size: 8 [2021-11-02 22:59:10,210 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse3 (fp.div c_currentRoundingMode .cse2 ULTIMATE.start_SqrtR_~Input))) (let ((.cse4 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse5 (fp.add c_currentRoundingMode .cse3 .cse3))) (let ((.cse0 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse4) .cse5)) (.cse1 (fp.mul c_currentRoundingMode .cse4 .cse5))) (and (not (fp.gt .cse0 .cse1)) (not (fp.lt .cse0 (fp.neg .cse1))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse2)) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode 20.0)) (= |c_ULTIMATE.start_SqrtR_#res| (fp.div c_currentRoundingMode .cse2 .cse3)))))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-02 22:59:21,526 WARN L207 SmtUtils]: Spent 6.23 s on a formula simplification that was a NOOP. DAG size: 15 [2021-11-02 22:59:27,691 WARN L207 SmtUtils]: Spent 6.16 s on a formula simplification that was a NOOP. DAG size: 5 [2021-11-02 22:59:33,923 WARN L207 SmtUtils]: Spent 6.23 s on a formula simplification that was a NOOP. DAG size: 16 [2021-11-02 22:59:39,588 WARN L207 SmtUtils]: Spent 5.66 s on a formula simplification that was a NOOP. DAG size: 10 [2021-11-02 22:59:45,813 WARN L207 SmtUtils]: Spent 6.22 s on a formula simplification that was a NOOP. DAG size: 6 [2021-11-02 22:59:54,566 WARN L207 SmtUtils]: Spent 6.26 s on a formula simplification that was a NOOP. DAG size: 15 [2021-11-02 23:00:00,761 WARN L207 SmtUtils]: Spent 6.19 s on a formula simplification that was a NOOP. DAG size: 5 [2021-11-02 23:00:10,556 WARN L207 SmtUtils]: Spent 5.66 s on a formula simplification that was a NOOP. DAG size: 10 [2021-11-02 23:00:16,696 WARN L207 SmtUtils]: Spent 6.14 s on a formula simplification that was a NOOP. DAG size: 6 [2021-11-02 23:00:22,874 WARN L207 SmtUtils]: Spent 6.17 s on a formula simplification that was a NOOP. DAG size: 15 [2021-11-02 23:00:29,029 WARN L207 SmtUtils]: Spent 6.15 s on a formula simplification that was a NOOP. DAG size: 5 [2021-11-02 23:00:39,721 WARN L207 SmtUtils]: Spent 6.13 s on a formula simplification that was a NOOP. DAG size: 10 [2021-11-02 23:00:45,865 WARN L207 SmtUtils]: Spent 6.14 s on a formula simplification that was a NOOP. DAG size: 10 [2021-11-02 23:00:52,018 WARN L207 SmtUtils]: Spent 6.15 s on a formula simplification that was a NOOP. DAG size: 6 [2021-11-02 23:01:00,835 WARN L207 SmtUtils]: Spent 6.24 s on a formula simplification that was a NOOP. DAG size: 15 [2021-11-02 23:01:07,012 WARN L207 SmtUtils]: Spent 6.17 s on a formula simplification that was a NOOP. DAG size: 5 [2021-11-02 23:01:17,747 WARN L207 SmtUtils]: Spent 6.21 s on a formula simplification that was a NOOP. DAG size: 9 [2021-11-02 23:01:23,902 WARN L207 SmtUtils]: Spent 6.15 s on a formula simplification that was a NOOP. DAG size: 9 [2021-11-02 23:01:30,135 WARN L207 SmtUtils]: Spent 6.23 s on a formula simplification that was a NOOP. DAG size: 6 [2021-11-02 23:01:36,332 WARN L207 SmtUtils]: Spent 6.15 s on a formula simplification that was a NOOP. DAG size: 15 [2021-11-02 23:01:42,511 WARN L207 SmtUtils]: Spent 6.18 s on a formula simplification that was a NOOP. DAG size: 5 [2021-11-02 23:01:52,839 WARN L207 SmtUtils]: Spent 6.18 s on a formula simplification that was a NOOP. DAG size: 3 [2021-11-02 23:01:59,056 WARN L207 SmtUtils]: Spent 6.22 s on a formula simplification that was a NOOP. DAG size: 10 [2021-11-02 23:02:05,275 WARN L207 SmtUtils]: Spent 6.22 s on a formula simplification that was a NOOP. DAG size: 10 [2021-11-02 23:02:11,382 WARN L207 SmtUtils]: Spent 6.11 s on a formula simplification that was a NOOP. DAG size: 9 [2021-11-02 23:02:17,529 WARN L207 SmtUtils]: Spent 6.15 s on a formula simplification that was a NOOP. DAG size: 3 [2021-11-02 23:02:23,840 WARN L207 SmtUtils]: Spent 6.31 s on a formula simplification that was a NOOP. DAG size: 9 [2021-11-02 23:02:30,021 WARN L207 SmtUtils]: Spent 6.18 s on a formula simplification that was a NOOP. DAG size: 6 [2021-11-02 23:02:32,548 WARN L838 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse6 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse2 (fp.div roundNearestTiesToEven .cse6 ULTIMATE.start_SqrtR_~Input))) (and (not (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse1 (fp.add roundNearestTiesToEven .cse2 .cse2))) (fp.gt (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse0) .cse1) (fp.mul roundNearestTiesToEven .cse0 .cse1)))) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven 20.0)) (let ((.cse5 (fp.div roundNearestTiesToEven .cse6 .cse2))) (let ((.cse4 (fp.leq .cse5 ((_ to_fp 11 53) roundNearestTiesToEven 5.0))) (.cse3 (fp.geq .cse5 ((_ to_fp 11 53) roundNearestTiesToEven (/ 3.0 10.0))))) (or (and (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)) (or (not .cse3) (not .cse4))) (and .cse4 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) .cse3)))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse6)))))) is different from false [2021-11-02 23:02:34,958 WARN L860 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse6 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse2 (fp.div roundNearestTiesToEven .cse6 ULTIMATE.start_SqrtR_~Input))) (and (not (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse1 (fp.add roundNearestTiesToEven .cse2 .cse2))) (fp.gt (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse0) .cse1) (fp.mul roundNearestTiesToEven .cse0 .cse1)))) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven 20.0)) (let ((.cse5 (fp.div roundNearestTiesToEven .cse6 .cse2))) (let ((.cse4 (fp.leq .cse5 ((_ to_fp 11 53) roundNearestTiesToEven 5.0))) (.cse3 (fp.geq .cse5 ((_ to_fp 11 53) roundNearestTiesToEven (/ 3.0 10.0))))) (or (and (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)) (or (not .cse3) (not .cse4))) (and .cse4 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) .cse3)))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse6)))))) is different from true [2021-11-02 23:02:46,219 WARN L207 SmtUtils]: Spent 6.18 s on a formula simplification that was a NOOP. DAG size: 15 [2021-11-02 23:02:52,452 WARN L207 SmtUtils]: Spent 6.23 s on a formula simplification that was a NOOP. DAG size: 5 [2021-11-02 23:02:58,098 WARN L207 SmtUtils]: Spent 5.64 s on a formula simplification that was a NOOP. DAG size: 10 [2021-11-02 23:03:04,332 WARN L207 SmtUtils]: Spent 6.23 s on a formula simplification that was a NOOP. DAG size: 6 [2021-11-02 23:03:13,047 WARN L207 SmtUtils]: Spent 6.18 s on a formula simplification that was a NOOP. DAG size: 15 [2021-11-02 23:03:19,243 WARN L207 SmtUtils]: Spent 6.20 s on a formula simplification that was a NOOP. DAG size: 5 [2021-11-02 23:03:24,936 WARN L207 SmtUtils]: Spent 5.69 s on a formula simplification that was a NOOP. DAG size: 10 [2021-11-02 23:03:31,139 WARN L207 SmtUtils]: Spent 6.20 s on a formula simplification that was a NOOP. DAG size: 6 [2021-11-02 23:03:37,333 WARN L207 SmtUtils]: Spent 6.19 s on a formula simplification that was a NOOP. DAG size: 15 [2021-11-02 23:03:43,559 WARN L207 SmtUtils]: Spent 6.23 s on a formula simplification that was a NOOP. DAG size: 5 [2021-11-02 23:03:49,811 WARN L207 SmtUtils]: Spent 6.24 s on a formula simplification that was a NOOP. DAG size: 10 [2021-11-02 23:03:56,052 WARN L207 SmtUtils]: Spent 6.24 s on a formula simplification that was a NOOP. DAG size: 10 [2021-11-02 23:04:02,307 WARN L207 SmtUtils]: Spent 6.25 s on a formula simplification that was a NOOP. DAG size: 6 [2021-11-02 23:04:04,832 WARN L838 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse4 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse2 (fp.div roundNearestTiesToEven .cse4 ULTIMATE.start_SqrtR_~Input))) (and (not (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse1 (fp.add roundNearestTiesToEven .cse2 .cse2))) (fp.gt (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse0) .cse1) (fp.mul roundNearestTiesToEven .cse0 .cse1)))) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven 20.0)) (let ((.cse3 (fp.div roundNearestTiesToEven .cse4 .cse2))) (or (not (fp.geq .cse3 ((_ to_fp 11 53) roundNearestTiesToEven (/ 3.0 10.0)))) (not (fp.leq .cse3 ((_ to_fp 11 53) roundNearestTiesToEven 5.0))))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse4)))))) is different from false [2021-11-02 23:04:07,191 WARN L860 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse4 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse2 (fp.div roundNearestTiesToEven .cse4 ULTIMATE.start_SqrtR_~Input))) (and (not (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse1 (fp.add roundNearestTiesToEven .cse2 .cse2))) (fp.gt (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse0) .cse1) (fp.mul roundNearestTiesToEven .cse0 .cse1)))) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven 20.0)) (let ((.cse3 (fp.div roundNearestTiesToEven .cse4 .cse2))) (or (not (fp.geq .cse3 ((_ to_fp 11 53) roundNearestTiesToEven (/ 3.0 10.0)))) (not (fp.leq .cse3 ((_ to_fp 11 53) roundNearestTiesToEven 5.0))))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse4)))))) is different from true [2021-11-02 23:04:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:07,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:04:13,015 WARN L207 SmtUtils]: Spent 5.06 s on a formula simplification that was a NOOP. DAG size: 8 [2021-11-02 23:04:18,063 WARN L207 SmtUtils]: Spent 5.05 s on a formula simplification that was a NOOP. DAG size: 8 [2021-11-02 23:04:20,310 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) c_ULTIMATE.start_SqrtR_~xnp1~0))) (and (fp.leq .cse0 ((_ to_fp 11 53) c_currentRoundingMode 5.0)) (fp.geq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 3.0 10.0))))) is different from false [2021-11-02 23:04:22,558 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) c_ULTIMATE.start_SqrtR_~xnp1~0))) (and (fp.leq .cse0 ((_ to_fp 11 53) c_currentRoundingMode 5.0)) (fp.geq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 3.0 10.0))))) is different from true [2021-11-02 23:04:27,630 WARN L207 SmtUtils]: Spent 5.05 s on a formula simplification that was a NOOP. DAG size: 4 [2021-11-02 23:04:32,668 WARN L207 SmtUtils]: Spent 5.04 s on a formula simplification that was a NOOP. DAG size: 8 [2021-11-02 23:04:37,694 WARN L207 SmtUtils]: Spent 5.03 s on a formula simplification that was a NOOP. DAG size: 8 [2021-11-02 23:04:39,936 WARN L838 $PredicateComparison]: unable to prove that (or (not (= c_ULTIMATE.start_SqrtR_~cond~0 (_ bv0 32))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) c_ULTIMATE.start_SqrtR_~xnp1~0))) (and (fp.leq .cse0 ((_ to_fp 11 53) c_currentRoundingMode 5.0)) (fp.geq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 3.0 10.0)))))) is different from false [2021-11-02 23:04:42,173 WARN L860 $PredicateComparison]: unable to prove that (or (not (= c_ULTIMATE.start_SqrtR_~cond~0 (_ bv0 32))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) c_ULTIMATE.start_SqrtR_~xnp1~0))) (and (fp.leq .cse0 ((_ to_fp 11 53) c_currentRoundingMode 5.0)) (fp.geq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 3.0 10.0)))))) is different from true [2021-11-02 23:04:47,586 WARN L207 SmtUtils]: Spent 5.40 s on a formula simplification that was a NOOP. DAG size: 10 [2021-11-02 23:04:52,980 WARN L207 SmtUtils]: Spent 5.39 s on a formula simplification that was a NOOP. DAG size: 8 [2021-11-02 23:04:58,443 WARN L207 SmtUtils]: Spent 5.46 s on a formula simplification that was a NOOP. DAG size: 8 [2021-11-02 23:05:03,759 WARN L207 SmtUtils]: Spent 5.32 s on a formula simplification that was a NOOP. DAG size: 11 [2021-11-02 23:05:06,071 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0))) (let ((.cse0 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) .cse3)) (.cse1 (fp.mul c_currentRoundingMode c_~_EPS~0 .cse3))) (or (fp.gt .cse0 .cse1) (let ((.cse2 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) c_ULTIMATE.start_SqrtR_~xn~0))) (and (fp.leq .cse2 ((_ to_fp 11 53) c_currentRoundingMode 5.0)) (fp.geq .cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 3.0 10.0))))) (fp.lt .cse0 (fp.neg .cse1))))) is different from false [2021-11-02 23:05:08,383 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0))) (let ((.cse0 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) .cse3)) (.cse1 (fp.mul c_currentRoundingMode c_~_EPS~0 .cse3))) (or (fp.gt .cse0 .cse1) (let ((.cse2 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) c_ULTIMATE.start_SqrtR_~xn~0))) (and (fp.leq .cse2 ((_ to_fp 11 53) c_currentRoundingMode 5.0)) (fp.geq .cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 3.0 10.0))))) (fp.lt .cse0 (fp.neg .cse1))))) is different from true [2021-11-02 23:05:14,789 WARN L207 SmtUtils]: Spent 6.39 s on a formula simplification that was a NOOP. DAG size: 14 [2021-11-02 23:05:21,079 WARN L207 SmtUtils]: Spent 6.29 s on a formula simplification that was a NOOP. DAG size: 5 [2021-11-02 23:05:27,412 WARN L207 SmtUtils]: Spent 6.33 s on a formula simplification that was a NOOP. DAG size: 9 [2021-11-02 23:05:29,215 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-02 23:05:29,216 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:05:29,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925800383] [2021-11-02 23:05:29,217 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/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") [2021-11-02 23:05:29,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1657550181] [2021-11-02 23:05:29,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:29,217 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-02 23:05:29,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/cvc4 [2021-11-02 23:05:29,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2021-11-02 23:05:29,223 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-02 23:05:29,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-02 23:05:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:34,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:05:34,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-11-02 23:05:34,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195841422] [2021-11-02 23:05:34,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:34,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:34,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:34,889 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:34,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c88eb7-28dc-4993-90e5-105dd9402d20/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process