./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_6+soft_float_4-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_6+soft_float_4-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX --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 7f9af890a0b98df8fb43a2c8ebf2715c4a4b8a7c4e81db20c6dd9c8d356ba701 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:51:26,125 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:51:26,249 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:51:26,258 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:51:26,259 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:51:26,303 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:51:26,304 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:51:26,305 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:51:26,306 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:51:26,313 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:51:26,314 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:51:26,315 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:51:26,316 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:51:26,318 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:51:26,319 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:51:26,319 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:51:26,319 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:51:26,320 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:51:26,321 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:51:26,321 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:51:26,322 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:51:26,322 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:51:26,324 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:51:26,324 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:51:26,325 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:51:26,325 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:51:26,326 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:51:26,326 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:51:26,326 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:51:26,327 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:51:26,328 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:51:26,329 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:51:26,329 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:51:26,329 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:51:26,330 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:51:26,330 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:51:26,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:51:26,330 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:51:26,331 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:51:26,331 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:51:26,331 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:51:26,332 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:51:26,332 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:51:26,332 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:51:26,333 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:51:26,333 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_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f9af890a0b98df8fb43a2c8ebf2715c4a4b8a7c4e81db20c6dd9c8d356ba701 [2023-11-12 00:51:26,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:51:26,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:51:26,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:51:26,668 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:51:26,668 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:51:26,671 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/combinations/square_6+soft_float_4-3a.c.cil.c [2023-11-12 00:51:29,937 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:51:30,167 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:51:30,168 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/sv-benchmarks/c/combinations/square_6+soft_float_4-3a.c.cil.c [2023-11-12 00:51:30,181 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/data/45149f053/404651e8bd0d4c81af2f56363fb650cf/FLAG218a2aea9 [2023-11-12 00:51:30,198 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/data/45149f053/404651e8bd0d4c81af2f56363fb650cf [2023-11-12 00:51:30,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:51:30,203 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:51:30,208 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:51:30,208 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:51:30,216 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:51:30,217 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:51:30" (1/1) ... [2023-11-12 00:51:30,218 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a981d55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:30, skipping insertion in model container [2023-11-12 00:51:30,219 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:51:30" (1/1) ... [2023-11-12 00:51:30,278 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:51:30,483 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_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/sv-benchmarks/c/combinations/square_6+soft_float_4-3a.c.cil.c[1997,2010] [2023-11-12 00:51:30,490 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_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/sv-benchmarks/c/combinations/square_6+soft_float_4-3a.c.cil.c[2366,2379] [2023-11-12 00:51:30,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:51:30,585 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:51:30,612 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_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/sv-benchmarks/c/combinations/square_6+soft_float_4-3a.c.cil.c[1997,2010] [2023-11-12 00:51:30,615 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_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/sv-benchmarks/c/combinations/square_6+soft_float_4-3a.c.cil.c[2366,2379] [2023-11-12 00:51:30,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:51:30,660 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:51:30,661 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:30 WrapperNode [2023-11-12 00:51:30,661 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:51:30,663 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:51:30,663 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:51:30,663 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:51:30,671 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:30" (1/1) ... [2023-11-12 00:51:30,697 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:30" (1/1) ... [2023-11-12 00:51:30,730 INFO L138 Inliner]: procedures = 27, calls = 20, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 79 [2023-11-12 00:51:30,731 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:51:30,733 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:51:30,733 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:51:30,733 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:51:30,743 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:30" (1/1) ... [2023-11-12 00:51:30,744 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:30" (1/1) ... [2023-11-12 00:51:30,755 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:30" (1/1) ... [2023-11-12 00:51:30,759 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:30" (1/1) ... [2023-11-12 00:51:30,777 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:30" (1/1) ... [2023-11-12 00:51:30,782 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:30" (1/1) ... [2023-11-12 00:51:30,784 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:30" (1/1) ... [2023-11-12 00:51:30,786 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:30" (1/1) ... [2023-11-12 00:51:30,789 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:51:30,790 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:51:30,790 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:51:30,790 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:51:30,791 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:30" (1/1) ... [2023-11-12 00:51:30,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:51:30,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:30,827 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:51:30,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:51:30,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:51:30,881 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-11-12 00:51:30,881 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-11-12 00:51:30,883 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-11-12 00:51:30,884 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-11-12 00:51:30,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:51:30,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:51:30,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:51:30,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:51:30,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:51:31,006 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:51:31,009 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:51:31,492 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:51:31,695 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:51:31,695 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 00:51:31,698 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:51:31 BoogieIcfgContainer [2023-11-12 00:51:31,699 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:51:31,702 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:51:31,703 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:51:31,707 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:51:31,707 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:51:30" (1/3) ... [2023-11-12 00:51:31,708 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59b8db3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:51:31, skipping insertion in model container [2023-11-12 00:51:31,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:30" (2/3) ... [2023-11-12 00:51:31,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59b8db3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:51:31, skipping insertion in model container [2023-11-12 00:51:31,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:51:31" (3/3) ... [2023-11-12 00:51:31,711 INFO L112 eAbstractionObserver]: Analyzing ICFG square_6+soft_float_4-3a.c.cil.c [2023-11-12 00:51:31,731 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:51:31,731 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 00:51:31,802 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:51:31,810 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;@48eda297, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:51:31,810 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 00:51:31,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 38 states have internal predecessors, (53), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-12 00:51:31,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 00:51:31,841 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:31,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 00:51:31,842 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:31,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:31,848 INFO L85 PathProgramCache]: Analyzing trace with hash 9084683, now seen corresponding path program 1 times [2023-11-12 00:51:31,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:31,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365372719] [2023-11-12 00:51:31,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:31,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:51:31,958 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 00:51:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:51:31,987 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-12 00:51:31,989 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 00:51:31,991 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-11-12 00:51:31,993 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-12 00:51:31,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:51:31,998 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-12 00:51:32,003 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-11-12 00:51:32,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 12:51:32 BoogieIcfgContainer [2023-11-12 00:51:32,021 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-12 00:51:32,021 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-12 00:51:32,021 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-12 00:51:32,022 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-12 00:51:32,022 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:51:31" (3/4) ... [2023-11-12 00:51:32,025 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-12 00:51:32,026 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-12 00:51:32,027 INFO L158 Benchmark]: Toolchain (without parser) took 1823.97ms. Allocated memory is still 176.2MB. Free memory was 133.2MB in the beginning and 136.7MB in the end (delta: -3.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 00:51:32,028 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 125.8MB. Free memory is still 72.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 00:51:32,029 INFO L158 Benchmark]: CACSL2BoogieTranslator took 453.84ms. Allocated memory is still 176.2MB. Free memory was 133.2MB in the beginning and 118.1MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-12 00:51:32,030 INFO L158 Benchmark]: Boogie Procedure Inliner took 68.37ms. Allocated memory is still 176.2MB. Free memory was 117.7MB in the beginning and 116.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 00:51:32,032 INFO L158 Benchmark]: Boogie Preprocessor took 56.11ms. Allocated memory is still 176.2MB. Free memory was 116.0MB in the beginning and 114.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 00:51:32,037 INFO L158 Benchmark]: RCFGBuilder took 909.16ms. Allocated memory is still 176.2MB. Free memory was 114.4MB in the beginning and 76.2MB in the end (delta: 38.2MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2023-11-12 00:51:32,038 INFO L158 Benchmark]: TraceAbstraction took 318.26ms. Allocated memory is still 176.2MB. Free memory was 75.4MB in the beginning and 136.7MB in the end (delta: -61.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 00:51:32,038 INFO L158 Benchmark]: Witness Printer took 4.97ms. Allocated memory is still 176.2MB. Free memory was 136.7MB in the beginning and 136.7MB in the end (delta: 2.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 00:51:32,048 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 125.8MB. Free memory is still 72.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 453.84ms. Allocated memory is still 176.2MB. Free memory was 133.2MB in the beginning and 118.1MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 68.37ms. Allocated memory is still 176.2MB. Free memory was 117.7MB in the beginning and 116.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 56.11ms. Allocated memory is still 176.2MB. Free memory was 116.0MB in the beginning and 114.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 909.16ms. Allocated memory is still 176.2MB. Free memory was 114.4MB in the beginning and 76.2MB in the end (delta: 38.2MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * TraceAbstraction took 318.26ms. Allocated memory is still 176.2MB. Free memory was 75.4MB in the beginning and 136.7MB in the end (delta: -61.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.97ms. Allocated memory is still 176.2MB. Free memory was 136.7MB in the beginning and 136.7MB in the end (delta: 2.6kB). 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: 48]: 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 someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L309] COND TRUE __VERIFIER_nondet_int() [L310] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=53, x=53] [L47] COND TRUE !(result >= 0.0f && result < 1.399f) VAL [IN=53, x=53] [L48] reach_error() VAL [IN=53, x=53] - UnprovableResult [Line: 60]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 51 locations, 2 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=51occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-12 00:51:32,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/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_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_6+soft_float_4-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX --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 7f9af890a0b98df8fb43a2c8ebf2715c4a4b8a7c4e81db20c6dd9c8d356ba701 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:51:34,789 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:51:34,903 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-11-12 00:51:34,912 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:51:34,913 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:51:34,964 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:51:34,964 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:51:34,965 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:51:34,966 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:51:34,971 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:51:34,972 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:51:34,972 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:51:34,972 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:51:34,974 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:51:34,974 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:51:34,975 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:51:34,976 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:51:34,976 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:51:34,977 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:51:34,978 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:51:34,978 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:51:34,979 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:51:34,979 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:51:34,980 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:51:34,980 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 00:51:34,980 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-12 00:51:34,981 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-12 00:51:34,981 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:51:34,981 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:51:34,982 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:51:34,983 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:51:34,983 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 00:51:34,984 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:51:34,984 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:51:34,984 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:51:34,985 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:51:34,985 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:51:34,985 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-12 00:51:34,985 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-12 00:51:34,986 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:51:34,986 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:51:34,987 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:51:34,987 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_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f9af890a0b98df8fb43a2c8ebf2715c4a4b8a7c4e81db20c6dd9c8d356ba701 [2023-11-12 00:51:35,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:51:35,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:51:35,491 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:51:35,492 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:51:35,493 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:51:35,494 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/combinations/square_6+soft_float_4-3a.c.cil.c [2023-11-12 00:51:38,723 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:51:39,043 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:51:39,044 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/sv-benchmarks/c/combinations/square_6+soft_float_4-3a.c.cil.c [2023-11-12 00:51:39,057 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/data/d4c74f422/fa8e7ba7b49042a08007e7670e06e45e/FLAG4fbe762a8 [2023-11-12 00:51:39,075 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/data/d4c74f422/fa8e7ba7b49042a08007e7670e06e45e [2023-11-12 00:51:39,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:51:39,083 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:51:39,087 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:51:39,087 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:51:39,092 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:51:39,093 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:51:39" (1/1) ... [2023-11-12 00:51:39,094 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b025ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:39, skipping insertion in model container [2023-11-12 00:51:39,094 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:51:39" (1/1) ... [2023-11-12 00:51:39,154 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:51:39,371 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_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/sv-benchmarks/c/combinations/square_6+soft_float_4-3a.c.cil.c[1997,2010] [2023-11-12 00:51:39,378 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_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/sv-benchmarks/c/combinations/square_6+soft_float_4-3a.c.cil.c[2366,2379] [2023-11-12 00:51:39,445 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:51:39,459 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:51:39,490 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_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/sv-benchmarks/c/combinations/square_6+soft_float_4-3a.c.cil.c[1997,2010] [2023-11-12 00:51:39,493 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_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/sv-benchmarks/c/combinations/square_6+soft_float_4-3a.c.cil.c[2366,2379] [2023-11-12 00:51:39,524 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:51:39,542 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:51:39,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:39 WrapperNode [2023-11-12 00:51:39,543 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:51:39,544 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:51:39,544 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:51:39,544 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:51:39,552 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:39" (1/1) ... [2023-11-12 00:51:39,566 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:39" (1/1) ... [2023-11-12 00:51:39,591 INFO L138 Inliner]: procedures = 28, calls = 20, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2023-11-12 00:51:39,591 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:51:39,592 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:51:39,592 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:51:39,593 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:51:39,601 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:39" (1/1) ... [2023-11-12 00:51:39,602 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:39" (1/1) ... [2023-11-12 00:51:39,607 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:39" (1/1) ... [2023-11-12 00:51:39,607 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:39" (1/1) ... [2023-11-12 00:51:39,637 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:39" (1/1) ... [2023-11-12 00:51:39,642 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:39" (1/1) ... [2023-11-12 00:51:39,644 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:39" (1/1) ... [2023-11-12 00:51:39,646 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:39" (1/1) ... [2023-11-12 00:51:39,660 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:51:39,661 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:51:39,661 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:51:39,661 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:51:39,662 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:39" (1/1) ... [2023-11-12 00:51:39,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:51:39,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:39,713 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:51:39,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:51:39,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:51:39,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-12 00:51:39,748 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-11-12 00:51:39,748 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-11-12 00:51:39,748 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-11-12 00:51:39,749 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-11-12 00:51:39,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:51:39,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:51:39,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:51:39,752 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:51:39,842 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:51:39,844 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:51:42,466 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:51:42,478 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:51:42,478 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 00:51:42,481 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:51:42 BoogieIcfgContainer [2023-11-12 00:51:42,481 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:51:42,485 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:51:42,486 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:51:42,489 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:51:42,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:51:39" (1/3) ... [2023-11-12 00:51:42,490 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79732ea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:51:42, skipping insertion in model container [2023-11-12 00:51:42,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:39" (2/3) ... [2023-11-12 00:51:42,491 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79732ea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:51:42, skipping insertion in model container [2023-11-12 00:51:42,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:51:42" (3/3) ... [2023-11-12 00:51:42,493 INFO L112 eAbstractionObserver]: Analyzing ICFG square_6+soft_float_4-3a.c.cil.c [2023-11-12 00:51:42,514 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:51:42,514 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 00:51:42,582 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:51:42,590 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;@f852c80, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:51:42,591 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 00:51:42,596 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 50 states have internal predecessors, (71), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-12 00:51:42,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:51:42,603 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:42,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:42,605 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:42,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:42,613 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2023-11-12 00:51:42,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-12 00:51:42,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [48207080] [2023-11-12 00:51:42,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:42,626 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 [2023-11-12 00:51:42,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/mathsat [2023-11-12 00:51:42,631 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/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) [2023-11-12 00:51:42,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/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 [2023-11-12 00:51:43,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:43,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 00:51:43,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:51:43,239 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:51:43,239 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-12 00:51:43,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [48207080] [2023-11-12 00:51:43,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [48207080] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:43,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:51:43,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:51:43,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273187517] [2023-11-12 00:51:43,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:43,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:51:43,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-12 00:51:43,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:51:43,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:51:43,281 INFO L87 Difference]: Start difference. First operand has 63 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 50 states have internal predecessors, (71), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:43,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:43,335 INFO L93 Difference]: Finished difference Result 121 states and 179 transitions. [2023-11-12 00:51:43,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:51:43,337 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 00:51:43,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:43,348 INFO L225 Difference]: With dead ends: 121 [2023-11-12 00:51:43,348 INFO L226 Difference]: Without dead ends: 56 [2023-11-12 00:51:43,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:51:43,359 INFO L413 NwaCegarLoop]: 82 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, 82 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 [2023-11-12 00:51:43,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:51:43,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-12 00:51:43,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-12 00:51:43,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 44 states have internal predecessors, (57), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-12 00:51:43,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2023-11-12 00:51:43,423 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 7 [2023-11-12 00:51:43,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:43,424 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2023-11-12 00:51:43,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:43,424 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2023-11-12 00:51:43,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:51:43,427 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:43,427 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:43,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/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)] Ended with exit code 0 [2023-11-12 00:51:43,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/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 [2023-11-12 00:51:43,641 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:43,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:43,642 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2023-11-12 00:51:43,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-12 00:51:43,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820854443] [2023-11-12 00:51:43,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:43,643 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 [2023-11-12 00:51:43,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/mathsat [2023-11-12 00:51:43,645 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/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) [2023-11-12 00:51:43,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c3e6ab-1cd2-4016-a79f-122cd5d5501e/bin/utaipan-verify-NcY6lQBIFX/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 (3)] Waiting until timeout for monitored process