./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/arctan_Pade.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/arctan_Pade.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 03d4f02c4d6708ec7407dd5809f77bd3b86d46b08411c69d0afecaf50bc68872 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:38:07,125 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:38:07,249 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 19:38:07,254 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:38:07,255 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:38:07,306 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:38:07,307 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:38:07,308 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:38:07,310 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:38:07,315 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:38:07,315 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:38:07,316 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:38:07,316 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:38:07,318 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:38:07,319 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:38:07,319 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:38:07,319 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:38:07,320 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:38:07,320 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:38:07,321 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:38:07,321 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:38:07,322 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:38:07,323 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:38:07,323 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:38:07,324 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:38:07,324 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:38:07,325 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:38:07,325 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:38:07,326 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:38:07,326 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:38:07,327 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:38:07,327 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:38:07,327 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:38:07,328 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:38:07,328 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:38:07,328 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:38:07,329 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:38:07,329 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:38:07,329 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:38:07,329 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:38:07,330 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:38:07,330 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:38:07,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:38:07,331 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:38:07,331 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:38:07,331 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:38:07,332 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:38:07,332 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03d4f02c4d6708ec7407dd5809f77bd3b86d46b08411c69d0afecaf50bc68872 [2023-11-21 19:38:07,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:38:07,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:38:07,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:38:07,676 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:38:07,681 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:38:07,683 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/float-benchs/arctan_Pade.c [2023-11-21 19:38:10,806 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:38:11,053 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:38:11,054 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/sv-benchmarks/c/float-benchs/arctan_Pade.c [2023-11-21 19:38:11,063 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/data/83b610fad/20e0a72b1eac4c08ba4d3f2c4d41d124/FLAG8d25c3745 [2023-11-21 19:38:11,081 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/data/83b610fad/20e0a72b1eac4c08ba4d3f2c4d41d124 [2023-11-21 19:38:11,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:38:11,091 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:38:11,094 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:38:11,094 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:38:11,100 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:38:11,100 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:38:11" (1/1) ... [2023-11-21 19:38:11,101 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f7ea1a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:11, skipping insertion in model container [2023-11-21 19:38:11,102 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:38:11" (1/1) ... [2023-11-21 19:38:11,128 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:38:11,317 WARN L240 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_6628ea1c-7414-4ffa-9c40-247f4a462d69/sv-benchmarks/c/float-benchs/arctan_Pade.c[665,678] [2023-11-21 19:38:11,333 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:38:11,344 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:38:11,357 WARN L240 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_6628ea1c-7414-4ffa-9c40-247f4a462d69/sv-benchmarks/c/float-benchs/arctan_Pade.c[665,678] [2023-11-21 19:38:11,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:38:11,379 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:38:11,379 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:11 WrapperNode [2023-11-21 19:38:11,380 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:38:11,381 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:38:11,381 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:38:11,381 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:38:11,389 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:11" (1/1) ... [2023-11-21 19:38:11,398 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:11" (1/1) ... [2023-11-21 19:38:11,424 INFO L138 Inliner]: procedures = 18, calls = 15, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 50 [2023-11-21 19:38:11,424 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:38:11,425 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:38:11,425 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:38:11,425 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:38:11,434 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:11" (1/1) ... [2023-11-21 19:38:11,435 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:11" (1/1) ... [2023-11-21 19:38:11,447 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:11" (1/1) ... [2023-11-21 19:38:11,447 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:11" (1/1) ... [2023-11-21 19:38:11,454 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:11" (1/1) ... [2023-11-21 19:38:11,462 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:11" (1/1) ... [2023-11-21 19:38:11,463 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:11" (1/1) ... [2023-11-21 19:38:11,465 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:11" (1/1) ... [2023-11-21 19:38:11,467 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:38:11,475 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:38:11,475 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:38:11,476 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:38:11,477 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:11" (1/1) ... [2023-11-21 19:38:11,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:38:11,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:38:11,513 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:38:11,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:38:11,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:38:11,557 INFO L130 BoogieDeclarations]: Found specification of procedure ARCTAN_POS [2023-11-21 19:38:11,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ARCTAN_POS [2023-11-21 19:38:11,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:38:11,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:38:11,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:38:11,559 INFO L130 BoogieDeclarations]: Found specification of procedure ARCTAN_0_1 [2023-11-21 19:38:11,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ARCTAN_0_1 [2023-11-21 19:38:11,645 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:38:11,648 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:38:11,771 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:38:11,831 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:38:11,831 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 19:38:11,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:38:11 BoogieIcfgContainer [2023-11-21 19:38:11,833 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:38:11,836 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:38:11,837 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:38:11,840 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:38:11,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:38:11" (1/3) ... [2023-11-21 19:38:11,843 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47ca210c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:38:11, skipping insertion in model container [2023-11-21 19:38:11,843 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:11" (2/3) ... [2023-11-21 19:38:11,844 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47ca210c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:38:11, skipping insertion in model container [2023-11-21 19:38:11,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:38:11" (3/3) ... [2023-11-21 19:38:11,846 INFO L112 eAbstractionObserver]: Analyzing ICFG arctan_Pade.c [2023-11-21 19:38:11,867 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:38:11,868 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:38:11,916 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:38:11,924 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@49a91e24, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:38:11,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:38:11,929 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 19:38:11,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 19:38:11,941 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:38:11,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:38:11,943 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:38:11,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:38:11,951 INFO L85 PathProgramCache]: Analyzing trace with hash 536500847, now seen corresponding path program 1 times [2023-11-21 19:38:11,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:38:11,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666259753] [2023-11-21 19:38:11,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:38:11,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:38:12,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:38:12,085 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 19:38:12,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:38:12,136 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-21 19:38:12,138 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 19:38:12,140 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-21 19:38:12,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:38:12,147 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-21 19:38:12,156 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-21 19:38:12,177 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret5 could not be translated [2023-11-21 19:38:12,179 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret7 could not be translated [2023-11-21 19:38:12,195 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 07:38:12 BoogieIcfgContainer [2023-11-21 19:38:12,195 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-21 19:38:12,197 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-21 19:38:12,197 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-21 19:38:12,198 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-21 19:38:12,198 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:38:11" (3/4) ... [2023-11-21 19:38:12,204 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-21 19:38:12,205 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-21 19:38:12,206 INFO L158 Benchmark]: Toolchain (without parser) took 1115.29ms. Allocated memory is still 140.5MB. Free memory was 102.1MB in the beginning and 60.6MB in the end (delta: 41.5MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2023-11-21 19:38:12,207 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 140.5MB. Free memory is still 111.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 19:38:12,208 INFO L158 Benchmark]: CACSL2BoogieTranslator took 286.01ms. Allocated memory is still 140.5MB. Free memory was 102.1MB in the beginning and 91.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-21 19:38:12,209 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.75ms. Allocated memory is still 140.5MB. Free memory was 91.1MB in the beginning and 90.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 19:38:12,210 INFO L158 Benchmark]: Boogie Preprocessor took 49.27ms. Allocated memory is still 140.5MB. Free memory was 90.0MB in the beginning and 88.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 19:38:12,216 INFO L158 Benchmark]: RCFGBuilder took 358.32ms. Allocated memory is still 140.5MB. Free memory was 88.4MB in the beginning and 75.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-21 19:38:12,216 INFO L158 Benchmark]: TraceAbstraction took 358.68ms. Allocated memory is still 140.5MB. Free memory was 75.3MB in the beginning and 60.6MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-21 19:38:12,218 INFO L158 Benchmark]: Witness Printer took 7.73ms. Allocated memory is still 140.5MB. Free memory was 60.6MB in the beginning and 60.6MB in the end (delta: 2.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 19:38:12,226 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 140.5MB. Free memory is still 111.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 286.01ms. Allocated memory is still 140.5MB. Free memory was 102.1MB in the beginning and 91.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.75ms. Allocated memory is still 140.5MB. Free memory was 91.1MB in the beginning and 90.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.27ms. Allocated memory is still 140.5MB. Free memory was 90.0MB in the beginning and 88.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 358.32ms. Allocated memory is still 140.5MB. Free memory was 88.4MB in the beginning and 75.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 358.68ms. Allocated memory is still 140.5MB. Free memory was 75.3MB in the beginning and 60.6MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 7.73ms. Allocated memory is still 140.5MB. Free memory was 60.6MB in the beginning and 60.6MB in the end (delta: 2.7kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret7 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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: 17]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 54, overapproximation of someUnaryDOUBLEoperation at line 41, overapproximation of someBinaryArithmeticDOUBLEoperation at line 35. Possible FailurePath: [L20] const double Pi=3.141592653589793238; [L47] double a, r; [L49] a = __VERIFIER_nondet_double() [L50] CALL assume_abort_if_not(a >= -1.79e308 && a <= 1.79e308) [L15] COND FALSE !(!cond) [L50] RET assume_abort_if_not(a >= -1.79e308 && a <= 1.79e308) [L52] CALL, EXPR ARCTAN(a) [L41] COND TRUE x < 0 VAL [Pi=1570796326794896619/500000000000000000, \old(x)=56, x=56] [L41] CALL, EXPR ARCTAN_POS(-x) VAL [Pi=1570796326794896619/500000000000000000] [L35] COND TRUE x > 1. VAL [Pi=1570796326794896619/500000000000000000, \old(x)=58, x=58] [L35] CALL, EXPR ARCTAN_0_1(1. / x) VAL [Pi=1570796326794896619/500000000000000000] [L30] CALL, EXPR PADE_2_2(x) [L24] double x_2 = x*x; [L25] return 1. - x_2 / (3. + 9./5.*x_2); [L30] RET, EXPR PADE_2_2(x) [L30] return x*PADE_2_2(x); [L35] RET, EXPR ARCTAN_0_1(1. / x) VAL [Pi=1570796326794896619/500000000000000000, \old(x)=58, x=58] [L35] return Pi / 2. - ARCTAN_0_1(1. / x); [L41] RET, EXPR ARCTAN_POS(-x) VAL [Pi=1570796326794896619/500000000000000000, \old(x)=56, x=56] [L41] return -ARCTAN_POS(-x); [L52] RET, EXPR ARCTAN(a) [L52] r = ARCTAN(a) [L54] CALL __VERIFIER_assert(r >= -1.571 && r <= 1.571) [L17] COND TRUE !(cond) VAL [Pi=1570796326794896619/500000000000000000, \old(cond)=0, cond=0] [L17] reach_error() VAL [Pi=1570796326794896619/500000000000000000, \old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-21 19:38:12,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/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/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/arctan_Pade.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 03d4f02c4d6708ec7407dd5809f77bd3b86d46b08411c69d0afecaf50bc68872 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:38:15,063 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:38:15,205 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-11-21 19:38:15,214 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:38:15,215 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:38:15,260 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:38:15,261 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:38:15,261 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:38:15,263 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:38:15,268 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:38:15,268 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:38:15,269 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:38:15,269 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:38:15,271 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:38:15,271 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:38:15,272 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:38:15,273 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:38:15,273 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:38:15,274 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:38:15,275 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:38:15,275 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:38:15,276 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:38:15,276 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:38:15,277 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:38:15,277 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 19:38:15,278 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-21 19:38:15,278 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-21 19:38:15,279 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:38:15,279 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:38:15,280 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:38:15,281 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:38:15,281 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 19:38:15,282 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:38:15,282 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:38:15,282 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:38:15,283 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:38:15,283 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:38:15,283 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:38:15,283 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-21 19:38:15,284 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-21 19:38:15,285 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:38:15,285 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:38:15,285 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:38:15,286 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:38:15,286 INFO L153 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_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03d4f02c4d6708ec7407dd5809f77bd3b86d46b08411c69d0afecaf50bc68872 [2023-11-21 19:38:15,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:38:15,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:38:15,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:38:15,737 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:38:15,737 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:38:15,739 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/float-benchs/arctan_Pade.c [2023-11-21 19:38:18,753 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:38:19,050 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:38:19,051 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/sv-benchmarks/c/float-benchs/arctan_Pade.c [2023-11-21 19:38:19,058 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/data/a3d9cd19d/0a85dc02570c4eb7b8e57acd7b0ff9e7/FLAG2e3ae28f8 [2023-11-21 19:38:19,073 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/data/a3d9cd19d/0a85dc02570c4eb7b8e57acd7b0ff9e7 [2023-11-21 19:38:19,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:38:19,077 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:38:19,079 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:38:19,079 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:38:19,090 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:38:19,091 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:38:19" (1/1) ... [2023-11-21 19:38:19,092 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@220ede5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:19, skipping insertion in model container [2023-11-21 19:38:19,092 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:38:19" (1/1) ... [2023-11-21 19:38:19,119 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:38:19,284 WARN L240 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_6628ea1c-7414-4ffa-9c40-247f4a462d69/sv-benchmarks/c/float-benchs/arctan_Pade.c[665,678] [2023-11-21 19:38:19,301 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:38:19,317 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:38:19,335 WARN L240 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_6628ea1c-7414-4ffa-9c40-247f4a462d69/sv-benchmarks/c/float-benchs/arctan_Pade.c[665,678] [2023-11-21 19:38:19,351 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:38:19,368 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:38:19,369 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:19 WrapperNode [2023-11-21 19:38:19,369 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:38:19,370 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:38:19,370 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:38:19,370 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:38:19,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:19" (1/1) ... [2023-11-21 19:38:19,403 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:19" (1/1) ... [2023-11-21 19:38:19,424 INFO L138 Inliner]: procedures = 19, calls = 15, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 51 [2023-11-21 19:38:19,424 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:38:19,425 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:38:19,425 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:38:19,426 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:38:19,435 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:19" (1/1) ... [2023-11-21 19:38:19,436 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:19" (1/1) ... [2023-11-21 19:38:19,440 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:19" (1/1) ... [2023-11-21 19:38:19,440 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:19" (1/1) ... [2023-11-21 19:38:19,449 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:19" (1/1) ... [2023-11-21 19:38:19,451 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:19" (1/1) ... [2023-11-21 19:38:19,453 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:19" (1/1) ... [2023-11-21 19:38:19,455 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:19" (1/1) ... [2023-11-21 19:38:19,458 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:38:19,459 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:38:19,460 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:38:19,460 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:38:19,461 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:19" (1/1) ... [2023-11-21 19:38:19,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:38:19,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:38:19,518 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:38:19,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:38:19,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:38:19,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-21 19:38:19,566 INFO L130 BoogieDeclarations]: Found specification of procedure ARCTAN_POS [2023-11-21 19:38:19,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ARCTAN_POS [2023-11-21 19:38:19,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:38:19,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:38:19,566 INFO L130 BoogieDeclarations]: Found specification of procedure ARCTAN_0_1 [2023-11-21 19:38:19,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ARCTAN_0_1 [2023-11-21 19:38:19,666 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:38:19,669 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:38:25,499 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:38:25,570 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:38:25,570 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 19:38:25,572 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:38:25 BoogieIcfgContainer [2023-11-21 19:38:25,572 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:38:25,575 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:38:25,575 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:38:25,578 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:38:25,579 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:38:19" (1/3) ... [2023-11-21 19:38:25,580 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33a151fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:38:25, skipping insertion in model container [2023-11-21 19:38:25,580 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:38:19" (2/3) ... [2023-11-21 19:38:25,580 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33a151fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:38:25, skipping insertion in model container [2023-11-21 19:38:25,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:38:25" (3/3) ... [2023-11-21 19:38:25,582 INFO L112 eAbstractionObserver]: Analyzing ICFG arctan_Pade.c [2023-11-21 19:38:25,603 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:38:25,603 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:38:25,653 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:38:25,661 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@18922c27, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:38:25,661 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:38:25,665 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 19:38:25,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 19:38:25,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:38:25,675 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:38:25,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:38:25,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:38:25,682 INFO L85 PathProgramCache]: Analyzing trace with hash 536500847, now seen corresponding path program 1 times [2023-11-21 19:38:25,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 19:38:25,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397977930] [2023-11-21 19:38:25,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:38:25,696 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:38:25,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 19:38:25,700 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 19:38:25,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6628ea1c-7414-4ffa-9c40-247f4a462d69/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process