./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 dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:35:05,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:35:05,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:35:05,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:35:05,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:35:05,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:35:05,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:35:05,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:35:05,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:35:05,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:35:05,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:35:05,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:35:05,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:35:05,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:35:05,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:35:05,215 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:35:05,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:35:05,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:35:05,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:35:05,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:35:05,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:35:05,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:35:05,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:35:05,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:35:05,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:35:05,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:35:05,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:35:05,256 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:35:05,257 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:35:05,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:35:05,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:35:05,261 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:35:05,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:35:05,265 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:35:05,266 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:35:05,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:35:05,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:35:05,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:35:05,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:35:05,270 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:35:05,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:35:05,272 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:35:05,327 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:35:05,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:35:05,331 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:35:05,331 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:35:05,332 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:35:05,333 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:35:05,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:35:05,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:35:05,334 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:35:05,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:35:05,336 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:35:05,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:35:05,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:35:05,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:35:05,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:35:05,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:35:05,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:35:05,338 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:35:05,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:35:05,339 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:35:05,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:35:05,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:35:05,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:35:05,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:35:05,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:35:05,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:35:05,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:35:05,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:35:05,361 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:35:05,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:35:05,362 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:35:05,362 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:35:05,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:35:05,363 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_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bb1d9e312234d5c4f7ead2dcb51cc43e4ff3aebeffef1b0758f6a0d5be2ea9b [2022-10-17 10:35:05,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:35:05,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:35:05,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:35:05,724 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:35:05,725 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:35:05,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2022-10-17 10:35:05,796 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/data/52649d70f/747520ef7e5046589355dafbd88ea485/FLAG9c5926631 [2022-10-17 10:35:06,299 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:35:06,300 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2022-10-17 10:35:06,308 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/data/52649d70f/747520ef7e5046589355dafbd88ea485/FLAG9c5926631 [2022-10-17 10:35:06,685 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/data/52649d70f/747520ef7e5046589355dafbd88ea485 [2022-10-17 10:35:06,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:35:06,689 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:35:06,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:35:06,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:35:06,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:35:06,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:35:06" (1/1) ... [2022-10-17 10:35:06,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b74c8ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:06, skipping insertion in model container [2022-10-17 10:35:06,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:35:06" (1/1) ... [2022-10-17 10:35:06,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:35:06,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:35:06,989 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c[831,844] [2022-10-17 10:35:07,030 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:35:07,041 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:35:07,059 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c[831,844] [2022-10-17 10:35:07,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:35:07,099 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:35:07,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:07 WrapperNode [2022-10-17 10:35:07,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:35:07,100 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:35:07,100 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:35:07,100 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:35:07,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:07" (1/1) ... [2022-10-17 10:35:07,115 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:07" (1/1) ... [2022-10-17 10:35:07,137 INFO L138 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 63 [2022-10-17 10:35:07,137 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:35:07,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:35:07,139 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:35:07,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:35:07,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:07" (1/1) ... [2022-10-17 10:35:07,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:07" (1/1) ... [2022-10-17 10:35:07,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:07" (1/1) ... [2022-10-17 10:35:07,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:07" (1/1) ... [2022-10-17 10:35:07,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:07" (1/1) ... [2022-10-17 10:35:07,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:07" (1/1) ... [2022-10-17 10:35:07,162 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:07" (1/1) ... [2022-10-17 10:35:07,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:07" (1/1) ... [2022-10-17 10:35:07,165 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:35:07,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:35:07,166 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:35:07,166 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:35:07,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:07" (1/1) ... [2022-10-17 10:35:07,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:35:07,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:35:07,212 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:35:07,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:35:07,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:35:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:35:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:35:07,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:35:07,332 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:35:07,335 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:35:07,541 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:35:07,547 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:35:07,551 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 10:35:07,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:35:07 BoogieIcfgContainer [2022-10-17 10:35:07,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:35:07,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:35:07,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:35:07,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:35:07,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:35:06" (1/3) ... [2022-10-17 10:35:07,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b1afd69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:35:07, skipping insertion in model container [2022-10-17 10:35:07,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:07" (2/3) ... [2022-10-17 10:35:07,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b1afd69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:35:07, skipping insertion in model container [2022-10-17 10:35:07,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:35:07" (3/3) ... [2022-10-17 10:35:07,596 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_interval.c [2022-10-17 10:35:07,642 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:35:07,643 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:35:07,711 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:35:07,719 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2c4679d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:35:07,720 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:35:07,724 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) [2022-10-17 10:35:07,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 10:35:07,731 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:07,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:35:07,733 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:35:07,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:07,739 INFO L85 PathProgramCache]: Analyzing trace with hash 334453616, now seen corresponding path program 1 times [2022-10-17 10:35:07,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:07,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254353396] [2022-10-17 10:35:07,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:07,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:07,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:35:07,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:07,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254353396] [2022-10-17 10:35:07,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254353396] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:35:07,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:35:07,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:35:07,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645614477] [2022-10-17 10:35:07,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:35:07,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:35:07,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:07,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:35:07,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:35:07,970 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) [2022-10-17 10:35:07,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:07,987 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2022-10-17 10:35:07,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:35:07,990 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 [2022-10-17 10:35:07,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:08,003 INFO L225 Difference]: With dead ends: 29 [2022-10-17 10:35:08,003 INFO L226 Difference]: Without dead ends: 12 [2022-10-17 10:35:08,008 INFO L412 NwaCegarLoop]: 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 [2022-10-17 10:35:08,014 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:08,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:35:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-10-17 10:35:08,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-10-17 10:35:08,053 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) [2022-10-17 10:35:08,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-10-17 10:35:08,056 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 11 [2022-10-17 10:35:08,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:08,057 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-10-17 10:35:08,058 INFO L496 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) [2022-10-17 10:35:08,058 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-10-17 10:35:08,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 10:35:08,060 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:08,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:35:08,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:35:08,061 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:35:08,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:08,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1014511986, now seen corresponding path program 1 times [2022-10-17 10:35:08,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:08,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342770120] [2022-10-17 10:35:08,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:08,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:08,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:35:08,123 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:35:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:35:08,163 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:35:08,164 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:35:08,166 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-10-17 10:35:08,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:35:08,172 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-17 10:35:08,177 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-10-17 10:35:08,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.10 10:35:08 BoogieIcfgContainer [2022-10-17 10:35:08,206 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-10-17 10:35:08,210 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-10-17 10:35:08,211 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-10-17 10:35:08,211 INFO L275 PluginConnector]: Witness Printer initialized [2022-10-17 10:35:08,212 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:35:07" (3/4) ... [2022-10-17 10:35:08,215 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-10-17 10:35:08,216 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-10-17 10:35:08,218 INFO L158 Benchmark]: Toolchain (without parser) took 1527.98ms. Allocated memory was 81.8MB in the beginning and 127.9MB in the end (delta: 46.1MB). Free memory was 41.1MB in the beginning and 62.7MB in the end (delta: -21.6MB). Peak memory consumption was 23.2MB. Max. memory is 16.1GB. [2022-10-17 10:35:08,219 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 81.8MB. Free memory is still 57.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 10:35:08,225 INFO L158 Benchmark]: CACSL2BoogieTranslator took 368.96ms. Allocated memory was 81.8MB in the beginning and 127.9MB in the end (delta: 46.1MB). Free memory was 61.9MB in the beginning and 102.6MB in the end (delta: -40.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-10-17 10:35:08,227 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.44ms. Allocated memory is still 127.9MB. Free memory was 102.6MB in the beginning and 101.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 10:35:08,227 INFO L158 Benchmark]: Boogie Preprocessor took 26.71ms. Allocated memory is still 127.9MB. Free memory was 100.9MB in the beginning and 99.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 10:35:08,228 INFO L158 Benchmark]: RCFGBuilder took 387.85ms. Allocated memory is still 127.9MB. Free memory was 99.7MB in the beginning and 89.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-10-17 10:35:08,228 INFO L158 Benchmark]: TraceAbstraction took 635.12ms. Allocated memory is still 127.9MB. Free memory was 88.3MB in the beginning and 63.1MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-10-17 10:35:08,229 INFO L158 Benchmark]: Witness Printer took 6.42ms. Allocated memory is still 127.9MB. Free memory was 63.1MB in the beginning and 62.7MB in the end (delta: 389.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 10:35:08,240 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 81.8MB. Free memory is still 57.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 368.96ms. Allocated memory was 81.8MB in the beginning and 127.9MB in the end (delta: 46.1MB). Free memory was 61.9MB in the beginning and 102.6MB in the end (delta: -40.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.44ms. Allocated memory is still 127.9MB. Free memory was 102.6MB in the beginning and 101.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.71ms. Allocated memory is still 127.9MB. Free memory was 100.9MB in the beginning and 99.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 387.85ms. Allocated memory is still 127.9MB. Free memory was 99.7MB in the beginning and 89.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 635.12ms. Allocated memory is still 127.9MB. Free memory was 88.3MB in the beginning and 63.1MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Witness Printer took 6.42ms. Allocated memory is still 127.9MB. Free memory was 63.1MB in the beginning and 62.7MB in the end (delta: 389.9kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 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() [L52] CALL assume_abort_if_not(d >= 0.1 && d <= 20.0) [L18] COND FALSE !(!cond) VAL [\old(cond)=1, _EPS=1/1000000, cond=1] [L52] RET assume_abort_if_not(d >= 0.1 && d <= 20.0) [L54] CALL, EXPR SqrtR(d) [L26] double xn, xnp1, residu, lsup, linf; [L27] int i, cond; VAL [\old(Input)=53, _EPS=1/1000000, Input=53] [L28] COND TRUE Input <= 1.0 [L28] xn = 1.0 VAL [\old(Input)=53, _EPS=1/1000000, Input=53, xn=1] [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 [\old(Input)=53, _EPS=1/1000000, cond=0, i=0, Input=53, xn=1, xn=1] [L35] COND FALSE !(\read(cond)) VAL [\old(Input)=53, _EPS=1/1000000, cond=0, i=0, Input=53, xn=1, xn=1] [L44] return 1.0 / xnp1; VAL [\old(Input)=53, _EPS=1/1000000, cond=0, i=0, Input=53, xn=1, xn=1] [L54] RET, EXPR SqrtR(d) [L54] r = SqrtR(d) [L56] CALL __VERIFIER_assert(r >= 0.3 && r <= 5.) [L20] COND TRUE !(cond) VAL [\old(cond)=0, _EPS=1/1000000, cond=0] [L20] reach_error() VAL [\old(cond)=0, _EPS=1/1000000, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 17 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 17 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=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, 0.0s 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 [2022-10-17 10:35:08,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/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_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:35:10,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:35:10,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:35:10,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:35:10,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:35:10,860 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:35:10,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:35:10,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:35:10,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:35:10,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:35:10,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:35:10,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:35:10,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:35:10,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:35:10,892 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:35:10,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:35:10,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:35:10,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:35:10,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:35:10,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:35:10,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:35:10,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:35:10,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:35:10,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:35:10,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:35:10,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:35:10,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:35:10,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:35:10,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:35:10,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:35:10,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:35:10,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:35:10,934 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:35:10,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:35:10,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:35:10,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:35:10,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:35:10,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:35:10,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:35:10,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:35:10,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:35:10,942 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-10-17 10:35:10,984 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:35:10,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:35:10,985 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:35:10,985 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:35:10,986 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:35:10,986 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:35:10,987 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:35:10,988 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:35:10,988 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:35:10,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:35:10,989 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:35:10,989 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:35:10,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:35:10,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:35:10,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:35:10,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:35:10,990 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 10:35:10,991 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-10-17 10:35:10,991 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-10-17 10:35:10,991 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:35:10,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:35:10,991 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:35:10,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:35:10,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:35:10,992 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:35:10,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:35:10,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:35:10,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:35:10,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:35:10,993 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:35:10,993 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-10-17 10:35:10,994 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-10-17 10:35:10,994 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:35:10,994 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:35:10,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:35:10,995 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-10-17 10:35:10,995 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_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bb1d9e312234d5c4f7ead2dcb51cc43e4ff3aebeffef1b0758f6a0d5be2ea9b [2022-10-17 10:35:11,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:35:11,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:35:11,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:35:11,442 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:35:11,443 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:35:11,444 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2022-10-17 10:35:11,517 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/data/ff51d12ba/83563d00198147f58e1fd563af80e170/FLAGae3bebf93 [2022-10-17 10:35:12,095 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:35:12,096 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2022-10-17 10:35:12,102 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/data/ff51d12ba/83563d00198147f58e1fd563af80e170/FLAGae3bebf93 [2022-10-17 10:35:12,483 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/data/ff51d12ba/83563d00198147f58e1fd563af80e170 [2022-10-17 10:35:12,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:35:12,495 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:35:12,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:35:12,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:35:12,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:35:12,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:35:12" (1/1) ... [2022-10-17 10:35:12,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16672a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:12, skipping insertion in model container [2022-10-17 10:35:12,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:35:12" (1/1) ... [2022-10-17 10:35:12,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:35:12,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:35:12,722 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c[831,844] [2022-10-17 10:35:12,757 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:35:12,775 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:35:12,797 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c[831,844] [2022-10-17 10:35:12,821 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:35:12,848 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:35:12,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:12 WrapperNode [2022-10-17 10:35:12,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:35:12,851 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:35:12,851 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:35:12,851 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:35:12,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:12" (1/1) ... [2022-10-17 10:35:12,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:12" (1/1) ... [2022-10-17 10:35:12,908 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 64 [2022-10-17 10:35:12,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:35:12,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:35:12,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:35:12,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:35:12,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:12" (1/1) ... [2022-10-17 10:35:12,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:12" (1/1) ... [2022-10-17 10:35:12,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:12" (1/1) ... [2022-10-17 10:35:12,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:12" (1/1) ... [2022-10-17 10:35:12,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:12" (1/1) ... [2022-10-17 10:35:12,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:12" (1/1) ... [2022-10-17 10:35:12,939 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:12" (1/1) ... [2022-10-17 10:35:12,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:12" (1/1) ... [2022-10-17 10:35:12,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:35:12,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:35:12,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:35:12,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:35:12,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:12" (1/1) ... [2022-10-17 10:35:12,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:35:12,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:35:12,989 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:35:12,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:35:13,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:35:13,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-10-17 10:35:13,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:35:13,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:35:13,099 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:35:13,101 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:35:22,094 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:35:22,101 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:35:22,102 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 10:35:22,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:35:22 BoogieIcfgContainer [2022-10-17 10:35:22,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:35:22,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:35:22,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:35:22,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:35:22,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:35:12" (1/3) ... [2022-10-17 10:35:22,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23e11a4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:35:22, skipping insertion in model container [2022-10-17 10:35:22,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:12" (2/3) ... [2022-10-17 10:35:22,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23e11a4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:35:22, skipping insertion in model container [2022-10-17 10:35:22,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:35:22" (3/3) ... [2022-10-17 10:35:22,115 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_interval.c [2022-10-17 10:35:22,139 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:35:22,139 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:35:22,198 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:35:22,207 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@53d80412, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:35:22,207 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:35:22,212 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) [2022-10-17 10:35:22,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 10:35:22,220 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:22,221 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:35:22,221 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:35:22,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:22,228 INFO L85 PathProgramCache]: Analyzing trace with hash 334453616, now seen corresponding path program 1 times [2022-10-17 10:35:22,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:35:22,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [196673171] [2022-10-17 10:35:22,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:22,245 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:35:22,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:35:22,252 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:35:22,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-10-17 10:35:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:23,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2022-10-17 10:35:23,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:35:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:35:23,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:35:23,993 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:35:23,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [196673171] [2022-10-17 10:35:23,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [196673171] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:35:23,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:35:23,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:35:23,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055771811] [2022-10-17 10:35:23,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:35:24,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:35:24,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:35:24,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:35:24,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:35:24,043 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) [2022-10-17 10:35:24,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:24,061 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2022-10-17 10:35:24,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:35:24,064 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 [2022-10-17 10:35:24,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:24,082 INFO L225 Difference]: With dead ends: 29 [2022-10-17 10:35:24,082 INFO L226 Difference]: Without dead ends: 12 [2022-10-17 10:35:24,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:35:24,095 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:24,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:35:24,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-10-17 10:35:24,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-10-17 10:35:24,131 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) [2022-10-17 10:35:24,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-10-17 10:35:24,134 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 11 [2022-10-17 10:35:24,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:24,134 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-10-17 10:35:24,135 INFO L496 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) [2022-10-17 10:35:24,135 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-10-17 10:35:24,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 10:35:24,137 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:24,137 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:35:24,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:35:24,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:35:24,359 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:35:24,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:24,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1014511986, now seen corresponding path program 1 times [2022-10-17 10:35:24,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:35:24,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464372302] [2022-10-17 10:35:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:24,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:35:24,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:35:24,362 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:35:24,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-10-17 10:35:25,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:25,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 10:35:25,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:35:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:35:26,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:35:26,802 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:35:26,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464372302] [2022-10-17 10:35:26,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464372302] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:35:26,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:35:26,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:35:26,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673919566] [2022-10-17 10:35:26,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:35:26,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:35:26,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:35:26,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:35:26,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:35:26,807 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-10-17 10:35:29,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.55s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 10:35:30,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 10:35:33,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 10:35:36,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.82s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 10:35:39,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.55s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 10:35:41,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 10:35:41,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:41,285 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-10-17 10:35:41,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:35:41,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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 [2022-10-17 10:35:41,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:41,287 INFO L225 Difference]: With dead ends: 19 [2022-10-17 10:35:41,287 INFO L226 Difference]: Without dead ends: 14 [2022-10-17 10:35:41,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:35:41,289 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:41,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 21 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 4 Unknown, 0 Unchecked, 14.3s Time] [2022-10-17 10:35:41,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-10-17 10:35:41,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-10-17 10:35:41,294 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) [2022-10-17 10:35:41,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-10-17 10:35:41,295 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-10-17 10:35:41,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:41,296 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-10-17 10:35:41,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-10-17 10:35:41,296 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-10-17 10:35:41,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 10:35:41,297 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:41,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:35:41,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:35:41,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:35:41,506 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:35:41,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:41,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1505447948, now seen corresponding path program 1 times [2022-10-17 10:35:41,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:35:41,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460763243] [2022-10-17 10:35:41,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:41,508 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:35:41,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:35:41,514 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:35:41,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b863becd-1753-447a-bee6-48f4a3d5b78f/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-10-17 10:35:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:48,476 WARN L261 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 20 conjunts are in the unsatisfiable core [2022-10-17 10:35:48,478 INFO L286 TraceCheckSpWp]: Computing forward predicates...