./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_4+soft_float_4-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_4+soft_float_4-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6266dcc240f970a5b491753808ae5c0bb4e18ac4824a7135095a19951d4d9404 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:04:34,785 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:04:34,899 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-06 21:04:34,910 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:04:34,911 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:04:34,951 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:04:34,951 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:04:34,952 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:04:34,953 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:04:34,958 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:04:34,959 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 21:04:34,959 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 21:04:34,959 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 21:04:34,961 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 21:04:34,961 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 21:04:34,962 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 21:04:34,962 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 21:04:34,963 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 21:04:34,963 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 21:04:34,963 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 21:04:34,965 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 21:04:34,966 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 21:04:34,966 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:04:34,967 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:04:34,967 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:04:34,968 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:04:34,968 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:04:34,969 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:04:34,969 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:04:34,969 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:04:34,970 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:04:34,970 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:04:34,971 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:04:34,971 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:04:34,971 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:04:34,972 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:04:34,972 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:04:34,972 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:04:34,972 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:04:34,973 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:04:34,973 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 21:04:34,973 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:04:34,974 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:04:34,974 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 21:04:34,974 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:04:34,974 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_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6266dcc240f970a5b491753808ae5c0bb4e18ac4824a7135095a19951d4d9404 [2023-11-06 21:04:35,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:04:35,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:04:35,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:04:35,299 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:04:35,300 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:04:35,303 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/combinations/square_4+soft_float_4-3a.c.cil.c [2023-11-06 21:04:38,488 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:04:38,725 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:04:38,725 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/sv-benchmarks/c/combinations/square_4+soft_float_4-3a.c.cil.c [2023-11-06 21:04:38,736 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/data/5c6ad82fa/0fd299d5d4c34c0aa46ba17aecfa8e67/FLAG2ccae27cf [2023-11-06 21:04:38,753 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/data/5c6ad82fa/0fd299d5d4c34c0aa46ba17aecfa8e67 [2023-11-06 21:04:38,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:04:38,761 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:04:38,766 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:04:38,767 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:04:38,772 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:04:38,772 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:04:38" (1/1) ... [2023-11-06 21:04:38,773 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@218a5f9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:38, skipping insertion in model container [2023-11-06 21:04:38,774 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:04:38" (1/1) ... [2023-11-06 21:04:38,828 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:04:39,048 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_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/sv-benchmarks/c/combinations/square_4+soft_float_4-3a.c.cil.c[1999,2012] [2023-11-06 21:04:39,053 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_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/sv-benchmarks/c/combinations/square_4+soft_float_4-3a.c.cil.c[2368,2381] [2023-11-06 21:04:39,096 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:04:39,107 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:04:39,130 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_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/sv-benchmarks/c/combinations/square_4+soft_float_4-3a.c.cil.c[1999,2012] [2023-11-06 21:04:39,131 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_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/sv-benchmarks/c/combinations/square_4+soft_float_4-3a.c.cil.c[2368,2381] [2023-11-06 21:04:39,164 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:04:39,180 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:04:39,181 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:39 WrapperNode [2023-11-06 21:04:39,181 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:04:39,182 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:04:39,183 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:04:39,183 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:04:39,190 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:39" (1/1) ... [2023-11-06 21:04:39,200 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:39" (1/1) ... [2023-11-06 21:04:39,222 INFO L138 Inliner]: procedures = 27, calls = 20, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 79 [2023-11-06 21:04:39,223 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:04:39,224 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:04:39,224 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:04:39,224 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:04:39,234 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:39" (1/1) ... [2023-11-06 21:04:39,234 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:39" (1/1) ... [2023-11-06 21:04:39,237 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:39" (1/1) ... [2023-11-06 21:04:39,238 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:39" (1/1) ... [2023-11-06 21:04:39,246 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:39" (1/1) ... [2023-11-06 21:04:39,251 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:39" (1/1) ... [2023-11-06 21:04:39,254 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:39" (1/1) ... [2023-11-06 21:04:39,256 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:39" (1/1) ... [2023-11-06 21:04:39,259 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:04:39,260 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:04:39,260 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:04:39,260 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:04:39,261 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:39" (1/1) ... [2023-11-06 21:04:39,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:04:39,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:04:39,296 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:04:39,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:04:39,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:04:39,348 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-11-06 21:04:39,348 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-11-06 21:04:39,349 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-11-06 21:04:39,349 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-11-06 21:04:39,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:04:39,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:04:39,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:04:39,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 21:04:39,350 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 21:04:39,436 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:04:39,438 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:04:39,832 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:04:40,057 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:04:40,058 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 21:04:40,061 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:04:40 BoogieIcfgContainer [2023-11-06 21:04:40,061 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:04:40,065 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:04:40,066 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:04:40,069 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:04:40,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:04:38" (1/3) ... [2023-11-06 21:04:40,070 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd2c42f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:04:40, skipping insertion in model container [2023-11-06 21:04:40,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:39" (2/3) ... [2023-11-06 21:04:40,074 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd2c42f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:04:40, skipping insertion in model container [2023-11-06 21:04:40,074 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:04:40" (3/3) ... [2023-11-06 21:04:40,075 INFO L112 eAbstractionObserver]: Analyzing ICFG square_4+soft_float_4-3a.c.cil.c [2023-11-06 21:04:40,098 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:04:40,098 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-06 21:04:40,157 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:04:40,163 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3394f249, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 21:04:40,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-06 21:04:40,168 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) [2023-11-06 21:04:40,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 21:04:40,175 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:04:40,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 21:04:40,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:04:40,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:04:40,182 INFO L85 PathProgramCache]: Analyzing trace with hash 9084683, now seen corresponding path program 1 times [2023-11-06 21:04:40,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:04:40,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722630257] [2023-11-06 21:04:40,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:04:40,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:04:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:04:40,297 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 21:04:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:04:40,325 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-06 21:04:40,327 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 21:04:40,328 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-11-06 21:04:40,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-06 21:04:40,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:04:40,335 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-06 21:04:40,339 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 21:04:40,357 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 09:04:40 BoogieIcfgContainer [2023-11-06 21:04:40,357 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 21:04:40,359 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 21:04:40,359 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 21:04:40,359 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 21:04:40,360 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:04:40" (3/4) ... [2023-11-06 21:04:40,364 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-06 21:04:40,365 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 21:04:40,366 INFO L158 Benchmark]: Toolchain (without parser) took 1605.02ms. Allocated memory is still 172.0MB. Free memory was 133.3MB in the beginning and 62.7MB in the end (delta: 70.7MB). Peak memory consumption was 71.3MB. Max. memory is 16.1GB. [2023-11-06 21:04:40,367 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 115.3MB. Free memory was 83.5MB in the beginning and 83.5MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 21:04:40,368 INFO L158 Benchmark]: CACSL2BoogieTranslator took 415.38ms. Allocated memory is still 172.0MB. Free memory was 133.3MB in the beginning and 118.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-06 21:04:40,369 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.60ms. Allocated memory is still 172.0MB. Free memory was 118.7MB in the beginning and 117.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 21:04:40,375 INFO L158 Benchmark]: Boogie Preprocessor took 35.51ms. Allocated memory is still 172.0MB. Free memory was 117.2MB in the beginning and 115.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 21:04:40,376 INFO L158 Benchmark]: RCFGBuilder took 801.76ms. Allocated memory is still 172.0MB. Free memory was 115.1MB in the beginning and 77.4MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2023-11-06 21:04:40,376 INFO L158 Benchmark]: TraceAbstraction took 292.42ms. Allocated memory is still 172.0MB. Free memory was 76.7MB in the beginning and 63.4MB in the end (delta: 13.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-06 21:04:40,377 INFO L158 Benchmark]: Witness Printer took 6.21ms. Allocated memory is still 172.0MB. Free memory was 63.4MB in the beginning and 62.7MB in the end (delta: 726.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 21:04:40,386 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 115.3MB. Free memory was 83.5MB in the beginning and 83.5MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 415.38ms. Allocated memory is still 172.0MB. Free memory was 133.3MB in the beginning and 118.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.60ms. Allocated memory is still 172.0MB. Free memory was 118.7MB in the beginning and 117.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.51ms. Allocated memory is still 172.0MB. Free memory was 117.2MB in the beginning and 115.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 801.76ms. Allocated memory is still 172.0MB. Free memory was 115.1MB in the beginning and 77.4MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * TraceAbstraction took 292.42ms. Allocated memory is still 172.0MB. Free memory was 76.7MB in the beginning and 63.4MB in the end (delta: 13.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 6.21ms. Allocated memory is still 172.0MB. Free memory was 63.4MB in the beginning and 62.7MB in the end (delta: 726.0kB). 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 < 1.39844f) 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 [2023-11-06 21:04:40,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/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_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_4+soft_float_4-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6266dcc240f970a5b491753808ae5c0bb4e18ac4824a7135095a19951d4d9404 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:04:43,037 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:04:43,171 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-11-06 21:04:43,180 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:04:43,180 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:04:43,232 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:04:43,233 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:04:43,233 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:04:43,234 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:04:43,239 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:04:43,240 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 21:04:43,240 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 21:04:43,241 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 21:04:43,243 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 21:04:43,243 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 21:04:43,244 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 21:04:43,245 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:04:43,245 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:04:43,246 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:04:43,247 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:04:43,247 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:04:43,248 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:04:43,249 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:04:43,249 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:04:43,249 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 21:04:43,250 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 21:04:43,250 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 21:04:43,251 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:04:43,251 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:04:43,252 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:04:43,253 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:04:43,253 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:04:43,254 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:04:43,254 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:04:43,254 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:04:43,255 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:04:43,255 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:04:43,255 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-06 21:04:43,256 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 21:04:43,257 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:04:43,257 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 21:04:43,257 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:04:43,258 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_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6266dcc240f970a5b491753808ae5c0bb4e18ac4824a7135095a19951d4d9404 [2023-11-06 21:04:43,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:04:43,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:04:43,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:04:43,679 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:04:43,680 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:04:43,681 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/combinations/square_4+soft_float_4-3a.c.cil.c [2023-11-06 21:04:46,765 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:04:47,075 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:04:47,076 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/sv-benchmarks/c/combinations/square_4+soft_float_4-3a.c.cil.c [2023-11-06 21:04:47,086 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/data/4a632a442/2be2fa696d224ebca957c4547fdd728d/FLAG93483ab2f [2023-11-06 21:04:47,106 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/data/4a632a442/2be2fa696d224ebca957c4547fdd728d [2023-11-06 21:04:47,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:04:47,110 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:04:47,111 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:04:47,111 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:04:47,118 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:04:47,119 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:04:47" (1/1) ... [2023-11-06 21:04:47,121 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5745b0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:47, skipping insertion in model container [2023-11-06 21:04:47,121 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:04:47" (1/1) ... [2023-11-06 21:04:47,156 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:04:47,354 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_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/sv-benchmarks/c/combinations/square_4+soft_float_4-3a.c.cil.c[1999,2012] [2023-11-06 21:04:47,362 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_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/sv-benchmarks/c/combinations/square_4+soft_float_4-3a.c.cil.c[2368,2381] [2023-11-06 21:04:47,413 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:04:47,429 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:04:47,445 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_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/sv-benchmarks/c/combinations/square_4+soft_float_4-3a.c.cil.c[1999,2012] [2023-11-06 21:04:47,447 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_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/sv-benchmarks/c/combinations/square_4+soft_float_4-3a.c.cil.c[2368,2381] [2023-11-06 21:04:47,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:04:47,494 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:04:47,494 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:47 WrapperNode [2023-11-06 21:04:47,495 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:04:47,496 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:04:47,496 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:04:47,496 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:04:47,502 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:47" (1/1) ... [2023-11-06 21:04:47,515 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:47" (1/1) ... [2023-11-06 21:04:47,538 INFO L138 Inliner]: procedures = 28, calls = 20, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2023-11-06 21:04:47,538 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:04:47,539 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:04:47,539 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:04:47,539 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:04:47,549 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:47" (1/1) ... [2023-11-06 21:04:47,549 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:47" (1/1) ... [2023-11-06 21:04:47,554 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:47" (1/1) ... [2023-11-06 21:04:47,555 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:47" (1/1) ... [2023-11-06 21:04:47,585 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:47" (1/1) ... [2023-11-06 21:04:47,590 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:47" (1/1) ... [2023-11-06 21:04:47,593 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:47" (1/1) ... [2023-11-06 21:04:47,595 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:47" (1/1) ... [2023-11-06 21:04:47,599 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:04:47,600 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:04:47,600 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:04:47,600 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:04:47,601 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:47" (1/1) ... [2023-11-06 21:04:47,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:04:47,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:04:47,637 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:04:47,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:04:47,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:04:47,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 21:04:47,674 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-11-06 21:04:47,674 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-11-06 21:04:47,675 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-11-06 21:04:47,675 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-11-06 21:04:47,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:04:47,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:04:47,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 21:04:47,676 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 21:04:47,758 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:04:47,760 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:04:50,244 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:04:50,250 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:04:50,251 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 21:04:50,253 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:04:50 BoogieIcfgContainer [2023-11-06 21:04:50,253 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:04:50,255 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:04:50,255 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:04:50,258 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:04:50,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:04:47" (1/3) ... [2023-11-06 21:04:50,259 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@566c2eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:04:50, skipping insertion in model container [2023-11-06 21:04:50,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:47" (2/3) ... [2023-11-06 21:04:50,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@566c2eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:04:50, skipping insertion in model container [2023-11-06 21:04:50,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:04:50" (3/3) ... [2023-11-06 21:04:50,261 INFO L112 eAbstractionObserver]: Analyzing ICFG square_4+soft_float_4-3a.c.cil.c [2023-11-06 21:04:50,277 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:04:50,277 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-06 21:04:50,329 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:04:50,334 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@45e5edab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 21:04:50,335 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-06 21:04:50,339 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) [2023-11-06 21:04:50,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 21:04:50,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:04:50,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:04:50,348 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:04:50,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:04:50,353 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2023-11-06 21:04:50,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 21:04:50,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463819583] [2023-11-06 21:04:50,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:04:50,369 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 [2023-11-06 21:04:50,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 21:04:50,374 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/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) [2023-11-06 21:04:50,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/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 [2023-11-06 21:04:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:04:50,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 21:04:50,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:04:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:04:50,932 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:04:50,933 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 21:04:50,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463819583] [2023-11-06 21:04:50,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463819583] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:04:50,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:04:50,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:04:50,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2177798] [2023-11-06 21:04:50,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:04:50,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 21:04:50,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 21:04:50,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 21:04:50,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:04:50,973 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) [2023-11-06 21:04:51,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:04:51,006 INFO L93 Difference]: Finished difference Result 121 states and 179 transitions. [2023-11-06 21:04:51,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 21:04:51,009 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 [2023-11-06 21:04:51,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:04:51,017 INFO L225 Difference]: With dead ends: 121 [2023-11-06 21:04:51,018 INFO L226 Difference]: Without dead ends: 56 [2023-11-06 21:04:51,022 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 [2023-11-06 21:04:51,026 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 [2023-11-06 21:04:51,027 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] [2023-11-06 21:04:51,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-06 21:04:51,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-06 21:04:51,066 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) [2023-11-06 21:04:51,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2023-11-06 21:04:51,071 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 7 [2023-11-06 21:04:51,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:04:51,071 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2023-11-06 21:04:51,072 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) [2023-11-06 21:04:51,072 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2023-11-06 21:04:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 21:04:51,073 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:04:51,073 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:04:51,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/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)] Forceful destruction successful, exit code 0 [2023-11-06 21:04:51,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/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 [2023-11-06 21:04:51,300 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:04:51,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:04:51,301 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2023-11-06 21:04:51,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 21:04:51,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511040645] [2023-11-06 21:04:51,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:04:51,302 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 [2023-11-06 21:04:51,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 21:04:51,304 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/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) [2023-11-06 21:04:51,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7759cf2-2c8b-4239-bb7f-30082fc15dd3/bin/utaipan-verify-FOvIYxoinp/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