./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire --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 e448f16723ad202cc72d167f8951516486910b6c33698da967b6635bbb5adec7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:33:33,708 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:33:33,832 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:33:33,841 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:33:33,842 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:33:33,880 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:33:33,881 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:33:33,882 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:33:33,883 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:33:33,888 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:33:33,888 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:33:33,889 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:33:33,890 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:33:33,891 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:33:33,892 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:33:33,892 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:33:33,893 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:33:33,893 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:33:33,893 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:33:33,894 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:33:33,894 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:33:33,896 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:33:33,897 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:33:33,898 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:33:33,898 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:33:33,899 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:33:33,899 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:33:33,900 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:33:33,900 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:33:33,900 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:33:33,902 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:33:33,902 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:33:33,902 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:33:33,902 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:33:33,903 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:33:33,903 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:33:33,903 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:33:33,903 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:33:33,904 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:33:33,904 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:33:33,904 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:33:33,905 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:33:33,905 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:33:33,905 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:33:33,906 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:33:33,906 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:33:33,906 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:33:33,906 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_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e448f16723ad202cc72d167f8951516486910b6c33698da967b6635bbb5adec7 [2023-11-23 20:33:34,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:33:34,243 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:33:34,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:33:34,248 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:33:34,249 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:33:34,250 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c [2023-11-23 20:33:37,430 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:33:37,817 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:33:37,819 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c [2023-11-23 20:33:37,840 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/data/ff7364273/9f1d0cea68c841588ed2d6e318508cbf/FLAG60b6064f8 [2023-11-23 20:33:37,858 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/data/ff7364273/9f1d0cea68c841588ed2d6e318508cbf [2023-11-23 20:33:37,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:33:37,862 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:33:37,864 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:33:37,864 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:33:37,870 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:33:37,871 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:37" (1/1) ... [2023-11-23 20:33:37,872 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10014c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:37, skipping insertion in model container [2023-11-23 20:33:37,872 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:37" (1/1) ... [2023-11-23 20:33:37,909 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:33:38,088 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_e796583b-3a89-408f-8c85-deccb18933da/sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c[1999,2012] [2023-11-23 20:33:38,095 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_e796583b-3a89-408f-8c85-deccb18933da/sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c[2393,2406] [2023-11-23 20:33:38,168 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:33:38,180 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:33:38,198 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_e796583b-3a89-408f-8c85-deccb18933da/sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c[1999,2012] [2023-11-23 20:33:38,200 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_e796583b-3a89-408f-8c85-deccb18933da/sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c[2393,2406] [2023-11-23 20:33:38,254 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:33:38,280 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:33:38,281 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:38 WrapperNode [2023-11-23 20:33:38,281 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:33:38,282 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:33:38,283 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:33:38,283 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:33:38,290 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:38" (1/1) ... [2023-11-23 20:33:38,309 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:38" (1/1) ... [2023-11-23 20:33:38,336 INFO L138 Inliner]: procedures = 27, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 79 [2023-11-23 20:33:38,337 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:33:38,337 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:33:38,338 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:33:38,338 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:33:38,359 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:38" (1/1) ... [2023-11-23 20:33:38,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:38" (1/1) ... [2023-11-23 20:33:38,362 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:38" (1/1) ... [2023-11-23 20:33:38,363 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:38" (1/1) ... [2023-11-23 20:33:38,371 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:38" (1/1) ... [2023-11-23 20:33:38,376 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:38" (1/1) ... [2023-11-23 20:33:38,379 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:38" (1/1) ... [2023-11-23 20:33:38,380 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:38" (1/1) ... [2023-11-23 20:33:38,384 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:33:38,385 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:33:38,385 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:33:38,385 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:33:38,386 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:38" (1/1) ... [2023-11-23 20:33:38,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:33:38,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:38,428 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:33:38,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:33:38,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:33:38,463 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-11-23 20:33:38,463 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-11-23 20:33:38,464 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-11-23 20:33:38,464 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-11-23 20:33:38,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:33:38,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:33:38,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:33:38,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 20:33:38,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 20:33:38,551 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:33:38,554 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:33:39,014 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:33:39,310 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:33:39,310 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 20:33:39,312 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:39 BoogieIcfgContainer [2023-11-23 20:33:39,313 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:33:39,317 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:33:39,318 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:33:39,322 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:33:39,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:33:37" (1/3) ... [2023-11-23 20:33:39,324 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f0370d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:39, skipping insertion in model container [2023-11-23 20:33:39,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:38" (2/3) ... [2023-11-23 20:33:39,327 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f0370d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:39, skipping insertion in model container [2023-11-23 20:33:39,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:39" (3/3) ... [2023-11-23 20:33:39,330 INFO L112 eAbstractionObserver]: Analyzing ICFG square_4+soft_float_4-2a.c.cil.c [2023-11-23 20:33:39,348 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:33:39,348 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 20:33:39,419 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:33:39,427 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;@58b3a625, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:33:39,427 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 20:33:39,432 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 37 states have internal predecessors, (52), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-23 20:33:39,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 20:33:39,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:39,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-23 20:33:39,444 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:39,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:39,450 INFO L85 PathProgramCache]: Analyzing trace with hash 9136577, now seen corresponding path program 1 times [2023-11-23 20:33:39,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:39,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657118943] [2023-11-23 20:33:39,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:39,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 20:33:39,558 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 20:33:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 20:33:39,594 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-23 20:33:39,597 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 20:33:39,603 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-11-23 20:33:39,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-23 20:33:39,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:33:39,612 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-23 20:33:39,624 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 20:33:39,648 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 08:33:39 BoogieIcfgContainer [2023-11-23 20:33:39,648 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 20:33:39,650 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 20:33:39,651 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 20:33:39,651 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 20:33:39,651 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:39" (3/4) ... [2023-11-23 20:33:39,656 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-23 20:33:39,657 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 20:33:39,659 INFO L158 Benchmark]: Toolchain (without parser) took 1796.56ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 101.5MB in the beginning and 110.8MB in the end (delta: -9.3MB). Peak memory consumption was 18.7MB. Max. memory is 16.1GB. [2023-11-23 20:33:39,659 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 109.1MB. Free memory is still 63.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 20:33:39,660 INFO L158 Benchmark]: CACSL2BoogieTranslator took 417.87ms. Allocated memory is still 132.1MB. Free memory was 101.0MB in the beginning and 87.4MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-23 20:33:39,661 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.39ms. Allocated memory is still 132.1MB. Free memory was 87.4MB in the beginning and 85.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 20:33:39,669 INFO L158 Benchmark]: Boogie Preprocessor took 46.67ms. Allocated memory is still 132.1MB. Free memory was 85.3MB in the beginning and 83.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 20:33:39,670 INFO L158 Benchmark]: RCFGBuilder took 928.76ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 83.7MB in the beginning and 125.5MB in the end (delta: -41.8MB). Peak memory consumption was 39.7MB. Max. memory is 16.1GB. [2023-11-23 20:33:39,672 INFO L158 Benchmark]: TraceAbstraction took 330.79ms. Allocated memory is still 159.4MB. Free memory was 124.3MB in the beginning and 111.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-23 20:33:39,673 INFO L158 Benchmark]: Witness Printer took 6.86ms. Allocated memory is still 159.4MB. Free memory was 111.7MB in the beginning and 110.8MB in the end (delta: 940.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 20:33:39,676 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 109.1MB. Free memory is still 63.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 417.87ms. Allocated memory is still 132.1MB. Free memory was 101.0MB in the beginning and 87.4MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.39ms. Allocated memory is still 132.1MB. Free memory was 87.4MB in the beginning and 85.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.67ms. Allocated memory is still 132.1MB. Free memory was 85.3MB in the beginning and 83.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 928.76ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 83.7MB in the beginning and 125.5MB in the end (delta: -41.8MB). Peak memory consumption was 39.7MB. Max. memory is 16.1GB. * TraceAbstraction took 330.79ms. Allocated memory is still 159.4MB. Free memory was 124.3MB in the beginning and 111.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 6.86ms. Allocated memory is still 159.4MB. Free memory was 111.7MB in the beginning and 110.8MB in the end (delta: 940.9kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 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: [L310] COND TRUE __VERIFIER_nondet_int() [L311] 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: 61]: 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, 49 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=49occurred 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 [2023-11-23 20:33:39,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire --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 e448f16723ad202cc72d167f8951516486910b6c33698da967b6635bbb5adec7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:33:42,465 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:33:42,607 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-11-23 20:33:42,615 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:33:42,616 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:33:42,665 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:33:42,665 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:33:42,666 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:33:42,667 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:33:42,673 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:33:42,673 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:33:42,674 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:33:42,674 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:33:42,676 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:33:42,677 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:33:42,677 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:33:42,678 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:33:42,679 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:33:42,679 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:33:42,680 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:33:42,680 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:33:42,681 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:33:42,682 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:33:42,682 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:33:42,683 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 20:33:42,683 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-23 20:33:42,683 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-23 20:33:42,684 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:33:42,684 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:33:42,685 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:33:42,686 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:33:42,687 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 20:33:42,687 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:33:42,688 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:33:42,688 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:33:42,688 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:33:42,689 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:33:42,689 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:33:42,689 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-23 20:33:42,690 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-23 20:33:42,691 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:33:42,691 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:33:42,691 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:33:42,691 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:33:42,692 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_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e448f16723ad202cc72d167f8951516486910b6c33698da967b6635bbb5adec7 [2023-11-23 20:33:43,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:33:43,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:33:43,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:33:43,186 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:33:43,186 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:33:43,188 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c [2023-11-23 20:33:46,436 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:33:46,794 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:33:46,797 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c [2023-11-23 20:33:46,810 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/data/1c7c2bca9/bd9d9a76d5a44059be9218daec8770ee/FLAG856508ccd [2023-11-23 20:33:46,832 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/data/1c7c2bca9/bd9d9a76d5a44059be9218daec8770ee [2023-11-23 20:33:46,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:33:46,841 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:33:46,845 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:33:46,845 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:33:46,852 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:33:46,853 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:46" (1/1) ... [2023-11-23 20:33:46,854 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a2a0a63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:46, skipping insertion in model container [2023-11-23 20:33:46,855 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:46" (1/1) ... [2023-11-23 20:33:46,912 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:33:47,159 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_e796583b-3a89-408f-8c85-deccb18933da/sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c[1999,2012] [2023-11-23 20:33:47,167 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_e796583b-3a89-408f-8c85-deccb18933da/sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c[2393,2406] [2023-11-23 20:33:47,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:33:47,288 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:33:47,318 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_e796583b-3a89-408f-8c85-deccb18933da/sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c[1999,2012] [2023-11-23 20:33:47,321 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_e796583b-3a89-408f-8c85-deccb18933da/sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c[2393,2406] [2023-11-23 20:33:47,353 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:33:47,372 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:33:47,373 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:47 WrapperNode [2023-11-23 20:33:47,373 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:33:47,374 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:33:47,375 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:33:47,375 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:33:47,383 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:47" (1/1) ... [2023-11-23 20:33:47,397 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:47" (1/1) ... [2023-11-23 20:33:47,421 INFO L138 Inliner]: procedures = 28, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2023-11-23 20:33:47,422 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:33:47,423 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:33:47,423 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:33:47,423 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:33:47,434 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:47" (1/1) ... [2023-11-23 20:33:47,434 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:47" (1/1) ... [2023-11-23 20:33:47,440 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:47" (1/1) ... [2023-11-23 20:33:47,440 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:47" (1/1) ... [2023-11-23 20:33:47,453 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:47" (1/1) ... [2023-11-23 20:33:47,458 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:47" (1/1) ... [2023-11-23 20:33:47,461 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:47" (1/1) ... [2023-11-23 20:33:47,463 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:47" (1/1) ... [2023-11-23 20:33:47,467 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:33:47,468 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:33:47,469 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:33:47,469 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:33:47,470 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:47" (1/1) ... [2023-11-23 20:33:47,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:33:47,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:47,517 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:33:47,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:33:47,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:33:47,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-23 20:33:47,632 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-11-23 20:33:47,632 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-11-23 20:33:47,634 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-11-23 20:33:47,635 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-11-23 20:33:47,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:33:47,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:33:47,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 20:33:47,636 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 20:33:47,724 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:33:47,727 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:33:50,365 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:33:50,395 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:33:50,396 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 20:33:50,396 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:50 BoogieIcfgContainer [2023-11-23 20:33:50,397 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:33:50,399 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:33:50,400 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:33:50,403 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:33:50,404 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:33:46" (1/3) ... [2023-11-23 20:33:50,405 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41208beb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:50, skipping insertion in model container [2023-11-23 20:33:50,405 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:47" (2/3) ... [2023-11-23 20:33:50,405 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41208beb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:50, skipping insertion in model container [2023-11-23 20:33:50,406 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:50" (3/3) ... [2023-11-23 20:33:50,407 INFO L112 eAbstractionObserver]: Analyzing ICFG square_4+soft_float_4-2a.c.cil.c [2023-11-23 20:33:50,429 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:33:50,430 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 20:33:50,484 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:33:50,492 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;@49c2268f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:33:50,492 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 20:33:50,497 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 43 states have (on average 1.558139534883721) internal successors, (67), 45 states have internal predecessors, (67), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-23 20:33:50,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 20:33:50,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:50,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 20:33:50,507 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:50,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:50,513 INFO L85 PathProgramCache]: Analyzing trace with hash 2097064236, now seen corresponding path program 1 times [2023-11-23 20:33:50,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:33:50,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895919749] [2023-11-23 20:33:50,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:50,526 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 [2023-11-23 20:33:50,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:33:50,533 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/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) [2023-11-23 20:33:50,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 20:33:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:51,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 20:33:51,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:51,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:51,133 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:33:51,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895919749] [2023-11-23 20:33:51,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895919749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:51,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:51,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:33:51,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670811893] [2023-11-23 20:33:51,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:51,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 20:33:51,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:33:51,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 20:33:51,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 20:33:51,174 INFO L87 Difference]: Start difference. First operand has 57 states, 43 states have (on average 1.558139534883721) internal successors, (67), 45 states have internal predecessors, (67), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2023-11-23 20:33:51,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:51,251 INFO L93 Difference]: Finished difference Result 110 states and 167 transitions. [2023-11-23 20:33:51,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 20:33:51,254 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2023-11-23 20:33:51,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:51,265 INFO L225 Difference]: With dead ends: 110 [2023-11-23 20:33:51,265 INFO L226 Difference]: Without dead ends: 53 [2023-11-23 20:33:51,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 20:33:51,274 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:51,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 69 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:33:51,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-23 20:33:51,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-23 20:33:51,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.375) internal successors, (55), 42 states have internal predecessors, (55), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-23 20:33:51,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2023-11-23 20:33:51,324 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 6 [2023-11-23 20:33:51,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:51,324 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2023-11-23 20:33:51,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2023-11-23 20:33:51,325 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2023-11-23 20:33:51,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 20:33:51,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:51,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 20:33:51,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 20:33:51,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 20:33:51,557 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:51,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:51,558 INFO L85 PathProgramCache]: Analyzing trace with hash 2097123818, now seen corresponding path program 1 times [2023-11-23 20:33:51,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:33:51,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392106088] [2023-11-23 20:33:51,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:51,560 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 [2023-11-23 20:33:51,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:33:51,562 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/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) [2023-11-23 20:33:51,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e796583b-3a89-408f-8c85-deccb18933da/bin/utaipan-verify-mE87zJ7Ire/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