./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/neural-networks/logistic_2_safe.c-amalgamation.i --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_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/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_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/neural-networks/logistic_2_safe.c-amalgamation.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/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_5e47c3dd-b559-4a6e-8349-0944f3f95201/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 df4e63065179c15050ee320a090475d1dc9ba3e18d41c6daedbc9adee2ffe791 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:08:12,790 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:08:12,920 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:08:12,926 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:08:12,927 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:08:12,972 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:08:12,973 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:08:12,974 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:08:12,975 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:08:12,980 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:08:12,980 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:08:12,981 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:08:12,982 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:08:12,984 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:08:12,984 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:08:12,984 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:08:12,985 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:08:12,985 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:08:12,986 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:08:12,986 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:08:12,986 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:08:12,987 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:08:12,988 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:08:12,989 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:08:12,989 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:08:12,989 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:08:12,990 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:08:12,990 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:08:12,991 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:08:12,991 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:08:12,992 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:08:12,993 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:08:12,993 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:08:12,993 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:08:12,993 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:08:12,994 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:08:12,994 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:08:12,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:08:12,994 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:08:12,995 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:08:12,995 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:08:12,995 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:08:12,995 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:08:12,996 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:08:12,996 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:08:12,996 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:08:12,997 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:08:12,997 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_5e47c3dd-b559-4a6e-8349-0944f3f95201/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df4e63065179c15050ee320a090475d1dc9ba3e18d41c6daedbc9adee2ffe791 [2023-11-23 21:08:13,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:08:13,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:08:13,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:08:13,331 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:08:13,331 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:08:13,332 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/neural-networks/logistic_2_safe.c-amalgamation.i [2023-11-23 21:08:16,477 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:08:16,832 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:08:16,848 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/sv-benchmarks/c/neural-networks/logistic_2_safe.c-amalgamation.i [2023-11-23 21:08:16,875 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire/data/8c8422646/a22d4266437346d993b72e421eb15e17/FLAGadd630040 [2023-11-23 21:08:16,891 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire/data/8c8422646/a22d4266437346d993b72e421eb15e17 [2023-11-23 21:08:16,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:08:16,896 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:08:16,900 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:08:16,900 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:08:16,906 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:08:16,907 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:16" (1/1) ... [2023-11-23 21:08:16,908 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40c2a6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:16, skipping insertion in model container [2023-11-23 21:08:16,909 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:16" (1/1) ... [2023-11-23 21:08:16,978 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:08:17,238 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-23 21:08:17,808 WARN L635 FunctionHandler]: implicit declaration of function __builtin_isnan [2023-11-23 21:08:17,810 WARN L1590 CHandler]: Possible shadowing of function y1 [2023-11-23 21:08:17,811 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_5e47c3dd-b559-4a6e-8349-0944f3f95201/sv-benchmarks/c/neural-networks/logistic_2_safe.c-amalgamation.i[63119,63132] [2023-11-23 21:08:17,815 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:08:17,827 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:08:17,845 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-23 21:08:17,870 WARN L635 FunctionHandler]: implicit declaration of function __builtin_isnan [2023-11-23 21:08:17,872 WARN L1590 CHandler]: Possible shadowing of function y1 [2023-11-23 21:08:17,872 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_5e47c3dd-b559-4a6e-8349-0944f3f95201/sv-benchmarks/c/neural-networks/logistic_2_safe.c-amalgamation.i[63119,63132] [2023-11-23 21:08:17,873 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:08:18,060 WARN L675 CHandler]: The function __builtin_isnan is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:18,061 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:18,069 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:08:18,070 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:18 WrapperNode [2023-11-23 21:08:18,070 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:08:18,071 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:08:18,071 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:08:18,071 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:08:18,078 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:18" (1/1) ... [2023-11-23 21:08:18,100 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:18" (1/1) ... [2023-11-23 21:08:18,126 INFO L138 Inliner]: procedures = 560, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 35 [2023-11-23 21:08:18,127 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:08:18,127 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:08:18,127 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:08:18,128 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:08:18,137 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:18" (1/1) ... [2023-11-23 21:08:18,137 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:18" (1/1) ... [2023-11-23 21:08:18,140 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:18" (1/1) ... [2023-11-23 21:08:18,140 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:18" (1/1) ... [2023-11-23 21:08:18,145 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:18" (1/1) ... [2023-11-23 21:08:18,147 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:18" (1/1) ... [2023-11-23 21:08:18,148 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:18" (1/1) ... [2023-11-23 21:08:18,149 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:18" (1/1) ... [2023-11-23 21:08:18,151 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:08:18,153 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:08:18,153 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:08:18,153 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:08:18,154 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:18" (1/1) ... [2023-11-23 21:08:18,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:08:18,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:18,205 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:08:18,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:08:18,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:08:18,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:08:18,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:08:18,260 INFO L130 BoogieDeclarations]: Found specification of procedure logistic [2023-11-23 21:08:18,260 INFO L138 BoogieDeclarations]: Found implementation of procedure logistic [2023-11-23 21:08:18,261 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_isnan [2023-11-23 21:08:18,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:08:18,438 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:08:18,440 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:08:18,577 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:08:18,639 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:08:18,647 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:08:18,648 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:18 BoogieIcfgContainer [2023-11-23 21:08:18,649 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:08:18,653 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:08:18,654 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:08:18,657 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:08:18,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:08:16" (1/3) ... [2023-11-23 21:08:18,661 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f91ddf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:18, skipping insertion in model container [2023-11-23 21:08:18,661 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:18" (2/3) ... [2023-11-23 21:08:18,663 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f91ddf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:18, skipping insertion in model container [2023-11-23 21:08:18,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:18" (3/3) ... [2023-11-23 21:08:18,665 INFO L112 eAbstractionObserver]: Analyzing ICFG logistic_2_safe.c-amalgamation.i [2023-11-23 21:08:18,683 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:08:18,684 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:08:18,730 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:08:18,737 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;@a085b52, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:08:18,737 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:08:18,742 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:08:18,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 21:08:18,755 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:18,756 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:18,757 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:18,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:18,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1165093942, now seen corresponding path program 1 times [2023-11-23 21:08:18,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:18,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171543729] [2023-11-23 21:08:18,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:18,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:08:18,855 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 21:08:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:08:18,909 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-23 21:08:18,912 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 21:08:18,913 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-23 21:08:18,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:08:18,918 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-23 21:08:18,922 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 21:08:18,935 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret91 could not be translated [2023-11-23 21:08:18,936 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret92 could not be translated [2023-11-23 21:08:18,946 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 09:08:18 BoogieIcfgContainer [2023-11-23 21:08:18,946 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 21:08:18,948 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 21:08:18,949 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 21:08:18,949 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 21:08:18,949 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:18" (3/4) ... [2023-11-23 21:08:18,955 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-23 21:08:18,956 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 21:08:18,957 INFO L158 Benchmark]: Toolchain (without parser) took 2061.07ms. Allocated memory is still 172.0MB. Free memory was 130.3MB in the beginning and 118.7MB in the end (delta: 11.6MB). Peak memory consumption was 13.7MB. Max. memory is 16.1GB. [2023-11-23 21:08:18,958 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 130.0MB. Free memory was 96.1MB in the beginning and 96.0MB in the end (delta: 31.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:08:18,959 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1170.51ms. Allocated memory is still 172.0MB. Free memory was 130.3MB in the beginning and 69.5MB in the end (delta: 60.8MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. [2023-11-23 21:08:18,961 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.87ms. Allocated memory is still 172.0MB. Free memory was 69.5MB in the beginning and 66.6MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-23 21:08:18,962 INFO L158 Benchmark]: Boogie Preprocessor took 24.44ms. Allocated memory is still 172.0MB. Free memory was 66.6MB in the beginning and 65.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:08:18,969 INFO L158 Benchmark]: RCFGBuilder took 497.31ms. Allocated memory is still 172.0MB. Free memory was 65.3MB in the beginning and 134.4MB in the end (delta: -69.1MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. [2023-11-23 21:08:18,971 INFO L158 Benchmark]: TraceAbstraction took 293.36ms. Allocated memory is still 172.0MB. Free memory was 133.4MB in the beginning and 118.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-23 21:08:18,972 INFO L158 Benchmark]: Witness Printer took 7.65ms. Allocated memory is still 172.0MB. Free memory is still 118.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:08:18,981 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 130.0MB. Free memory was 96.1MB in the beginning and 96.0MB in the end (delta: 31.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1170.51ms. Allocated memory is still 172.0MB. Free memory was 130.3MB in the beginning and 69.5MB in the end (delta: 60.8MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.87ms. Allocated memory is still 172.0MB. Free memory was 69.5MB in the beginning and 66.6MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.44ms. Allocated memory is still 172.0MB. Free memory was 66.6MB in the beginning and 65.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 497.31ms. Allocated memory is still 172.0MB. Free memory was 65.3MB in the beginning and 134.4MB in the end (delta: -69.1MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. * TraceAbstraction took 293.36ms. Allocated memory is still 172.0MB. Free memory was 133.4MB in the beginning and 118.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 7.65ms. Allocated memory is still 172.0MB. Free memory is still 118.7MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret91 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret92 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 856]: 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 856, overapproximation of someBinaryArithmeticFLOAToperation at line 847. Possible FailurePath: [L851] float x1 = __VERIFIER_nondet_float(); [L852] float x2 = x1 + 1e-5f; [L853] COND FALSE !(!(!__builtin_isnan (x1))) [L854] CALL, EXPR logistic(x1) VAL [\old(x)=116] [L847] return 0.5f * tanhf(0.5f * x) + 0.5f; [L854] RET, EXPR logistic(x1) VAL [x1=116] [L854] float y1 = logistic(x1); [L855] CALL, EXPR logistic(x2) VAL [\old(x)=119] [L847] return 0.5f * tanhf(0.5f * x) + 0.5f; [L855] RET, EXPR logistic(x2) VAL [x1=116, x2=119, y1=117] [L855] float y2 = logistic(x2); [L856] COND TRUE !(__builtin_islessequal(y1, y2)) VAL [x1=116, x2=119, y1=117, y2=118] [L856] reach_error() VAL [x1=116, x2=119, y1=117, y2=118] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 2, 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=12occurred 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, 11 NumberOfCodeBlocks, 11 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 21:08:19,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/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_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/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_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/neural-networks/logistic_2_safe.c-amalgamation.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/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_5e47c3dd-b559-4a6e-8349-0944f3f95201/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 df4e63065179c15050ee320a090475d1dc9ba3e18d41c6daedbc9adee2ffe791 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:08:21,690 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:08:21,836 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-11-23 21:08:21,844 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:08:21,845 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:08:21,889 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:08:21,889 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:08:21,890 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:08:21,891 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:08:21,896 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:08:21,897 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:08:21,897 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:08:21,898 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:08:21,900 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:08:21,900 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:08:21,901 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:08:21,902 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:08:21,903 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:08:21,903 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:08:21,904 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:08:21,905 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:08:21,905 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:08:21,906 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:08:21,906 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:08:21,907 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:08:21,907 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-23 21:08:21,908 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-23 21:08:21,908 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:08:21,909 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:08:21,909 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:08:21,911 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:08:21,911 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:08:21,911 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:08:21,912 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:08:21,912 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:08:21,913 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:08:21,913 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:08:21,913 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:08:21,913 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-23 21:08:21,914 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-23 21:08:21,915 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:08:21,915 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:08:21,915 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:08:21,916 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:08:21,916 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_5e47c3dd-b559-4a6e-8349-0944f3f95201/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df4e63065179c15050ee320a090475d1dc9ba3e18d41c6daedbc9adee2ffe791 [2023-11-23 21:08:22,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:08:22,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:08:22,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:08:22,367 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:08:22,368 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:08:22,369 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/neural-networks/logistic_2_safe.c-amalgamation.i [2023-11-23 21:08:25,591 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:08:26,049 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:08:26,051 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/sv-benchmarks/c/neural-networks/logistic_2_safe.c-amalgamation.i [2023-11-23 21:08:26,081 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire/data/28ebde46a/0eb7f1c34bc6485d98d133b3f3168a98/FLAGf42b48ec7 [2023-11-23 21:08:26,096 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire/data/28ebde46a/0eb7f1c34bc6485d98d133b3f3168a98 [2023-11-23 21:08:26,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:08:26,101 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:08:26,104 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:08:26,105 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:08:26,110 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:08:26,111 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:26" (1/1) ... [2023-11-23 21:08:26,112 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2637beb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:26, skipping insertion in model container [2023-11-23 21:08:26,112 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:26" (1/1) ... [2023-11-23 21:08:26,184 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:08:26,482 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-23 21:08:26,908 WARN L635 FunctionHandler]: implicit declaration of function __builtin_isnan [2023-11-23 21:08:26,910 WARN L1590 CHandler]: Possible shadowing of function y1 [2023-11-23 21:08:26,911 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_5e47c3dd-b559-4a6e-8349-0944f3f95201/sv-benchmarks/c/neural-networks/logistic_2_safe.c-amalgamation.i[63119,63132] [2023-11-23 21:08:26,915 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:08:26,928 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:08:26,947 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-23 21:08:26,986 WARN L635 FunctionHandler]: implicit declaration of function __builtin_isnan [2023-11-23 21:08:26,987 WARN L1590 CHandler]: Possible shadowing of function y1 [2023-11-23 21:08:26,988 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_5e47c3dd-b559-4a6e-8349-0944f3f95201/sv-benchmarks/c/neural-networks/logistic_2_safe.c-amalgamation.i[63119,63132] [2023-11-23 21:08:26,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:08:27,141 WARN L675 CHandler]: The function __builtin_isnan is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:27,141 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:27,149 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:08:27,150 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:27 WrapperNode [2023-11-23 21:08:27,150 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:08:27,151 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:08:27,151 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:08:27,151 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:08:27,158 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:27" (1/1) ... [2023-11-23 21:08:27,201 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:27" (1/1) ... [2023-11-23 21:08:27,237 INFO L138 Inliner]: procedures = 561, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 35 [2023-11-23 21:08:27,237 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:08:27,238 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:08:27,239 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:08:27,239 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:08:27,248 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:27" (1/1) ... [2023-11-23 21:08:27,249 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:27" (1/1) ... [2023-11-23 21:08:27,264 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:27" (1/1) ... [2023-11-23 21:08:27,264 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:27" (1/1) ... [2023-11-23 21:08:27,271 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:27" (1/1) ... [2023-11-23 21:08:27,277 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:27" (1/1) ... [2023-11-23 21:08:27,280 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:27" (1/1) ... [2023-11-23 21:08:27,282 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:27" (1/1) ... [2023-11-23 21:08:27,286 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:08:27,287 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:08:27,287 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:08:27,287 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:08:27,288 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:27" (1/1) ... [2023-11-23 21:08:27,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:08:27,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:27,330 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:08:27,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:08:27,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-23 21:08:27,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:08:27,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:08:27,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:08:27,376 INFO L130 BoogieDeclarations]: Found specification of procedure logistic [2023-11-23 21:08:27,377 INFO L138 BoogieDeclarations]: Found implementation of procedure logistic [2023-11-23 21:08:27,377 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_isnan [2023-11-23 21:08:27,523 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:08:27,525 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:08:28,073 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:08:28,131 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:08:28,136 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:08:28,137 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:28 BoogieIcfgContainer [2023-11-23 21:08:28,137 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:08:28,139 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:08:28,140 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:08:28,143 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:08:28,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:08:26" (1/3) ... [2023-11-23 21:08:28,146 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f3633a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:28, skipping insertion in model container [2023-11-23 21:08:28,146 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:27" (2/3) ... [2023-11-23 21:08:28,147 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f3633a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:28, skipping insertion in model container [2023-11-23 21:08:28,150 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:28" (3/3) ... [2023-11-23 21:08:28,151 INFO L112 eAbstractionObserver]: Analyzing ICFG logistic_2_safe.c-amalgamation.i [2023-11-23 21:08:28,172 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:08:28,172 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:08:28,221 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:08:28,231 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;@7d39a200, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:08:28,231 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:08:28,235 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:08:28,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 21:08:28,244 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:28,246 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:28,247 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:28,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:28,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1179918097, now seen corresponding path program 1 times [2023-11-23 21:08:28,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:08:28,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275307477] [2023-11-23 21:08:28,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:28,269 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 21:08:28,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:08:28,276 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/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 21:08:28,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/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 21:08:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:28,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 21:08:28,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:08:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:08:28,539 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:08:28,540 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:08:28,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275307477] [2023-11-23 21:08:28,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275307477] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:28,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:28,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:08:28,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484956828] [2023-11-23 21:08:28,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:28,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:08:28,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:08:28,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:08:28,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:08:28,583 INFO L87 Difference]: Start difference. First operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:08:28,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:28,899 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-11-23 21:08:28,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:08:28,902 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 12 [2023-11-23 21:08:28,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:28,909 INFO L225 Difference]: With dead ends: 24 [2023-11-23 21:08:28,909 INFO L226 Difference]: Without dead ends: 11 [2023-11-23 21:08:28,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 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 21:08:28,916 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:28,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:08:28,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-23 21:08:28,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-23 21:08:28,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:08:28,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2023-11-23 21:08:28,955 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 12 [2023-11-23 21:08:28,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:28,956 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2023-11-23 21:08:28,956 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:08:28,957 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2023-11-23 21:08:28,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 21:08:28,960 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:28,960 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:28,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/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)] Forceful destruction successful, exit code 0 [2023-11-23 21:08:29,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/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 21:08:29,165 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:29,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:29,166 INFO L85 PathProgramCache]: Analyzing trace with hash -478853519, now seen corresponding path program 1 times [2023-11-23 21:08:29,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:08:29,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830871142] [2023-11-23 21:08:29,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:29,167 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 21:08:29,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:08:29,168 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/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 21:08:29,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/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 [2023-11-23 21:08:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:08:29,390 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 21:08:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:08:29,592 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2023-11-23 21:08:29,592 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 21:08:29,594 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-23 21:08:29,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/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)] Forceful destruction successful, exit code 0 [2023-11-23 21:08:29,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/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 21:08:29,800 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-23 21:08:29,803 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 21:08:29,819 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret91 could not be translated [2023-11-23 21:08:29,821 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret92 could not be translated [2023-11-23 21:08:29,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 09:08:29 BoogieIcfgContainer [2023-11-23 21:08:29,833 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 21:08:29,834 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 21:08:29,834 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 21:08:29,835 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 21:08:29,835 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:28" (3/4) ... [2023-11-23 21:08:29,837 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-23 21:08:29,839 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 21:08:29,840 INFO L158 Benchmark]: Toolchain (without parser) took 3739.01ms. Allocated memory was 81.8MB in the beginning and 104.9MB in the end (delta: 23.1MB). Free memory was 55.0MB in the beginning and 50.2MB in the end (delta: 4.7MB). Peak memory consumption was 30.0MB. Max. memory is 16.1GB. [2023-11-23 21:08:29,840 INFO L158 Benchmark]: CDTParser took 1.36ms. Allocated memory is still 81.8MB. Free memory was 57.3MB in the beginning and 57.1MB in the end (delta: 141.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:08:29,841 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1045.97ms. Allocated memory was 81.8MB in the beginning and 104.9MB in the end (delta: 23.1MB). Free memory was 54.7MB in the beginning and 63.4MB in the end (delta: -8.6MB). Peak memory consumption was 28.6MB. Max. memory is 16.1GB. [2023-11-23 21:08:29,842 INFO L158 Benchmark]: Boogie Procedure Inliner took 87.02ms. Allocated memory is still 104.9MB. Free memory was 63.4MB in the beginning and 60.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-23 21:08:29,842 INFO L158 Benchmark]: Boogie Preprocessor took 47.44ms. Allocated memory is still 104.9MB. Free memory was 60.3MB in the beginning and 58.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 21:08:29,843 INFO L158 Benchmark]: RCFGBuilder took 850.68ms. Allocated memory is still 104.9MB. Free memory was 58.7MB in the beginning and 77.4MB in the end (delta: -18.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-23 21:08:29,844 INFO L158 Benchmark]: TraceAbstraction took 1694.10ms. Allocated memory is still 104.9MB. Free memory was 76.8MB in the beginning and 50.8MB in the end (delta: 26.0MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2023-11-23 21:08:29,844 INFO L158 Benchmark]: Witness Printer took 4.64ms. Allocated memory is still 104.9MB. Free memory is still 50.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:08:29,847 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.36ms. Allocated memory is still 81.8MB. Free memory was 57.3MB in the beginning and 57.1MB in the end (delta: 141.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1045.97ms. Allocated memory was 81.8MB in the beginning and 104.9MB in the end (delta: 23.1MB). Free memory was 54.7MB in the beginning and 63.4MB in the end (delta: -8.6MB). Peak memory consumption was 28.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 87.02ms. Allocated memory is still 104.9MB. Free memory was 63.4MB in the beginning and 60.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.44ms. Allocated memory is still 104.9MB. Free memory was 60.3MB in the beginning and 58.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 850.68ms. Allocated memory is still 104.9MB. Free memory was 58.7MB in the beginning and 77.4MB in the end (delta: -18.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1694.10ms. Allocated memory is still 104.9MB. Free memory was 76.8MB in the beginning and 50.8MB in the end (delta: 26.0MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Witness Printer took 4.64ms. Allocated memory is still 104.9MB. Free memory is still 50.2MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret91 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret92 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 856]: 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 tanhf at line 847. Possible FailurePath: [L851] float x1 = __VERIFIER_nondet_float(); [L852] float x2 = x1 + 1e-5f; [L853] COND FALSE !(!(!__builtin_isnan (x1))) [L854] CALL, EXPR logistic(x1) VAL [\old(x)=0.0] [L847] return 0.5f * tanhf(0.5f * x) + 0.5f; [L854] RET, EXPR logistic(x1) VAL [x1=0.0, x2=0.000009999999747378752] [L854] float y1 = logistic(x1); [L855] CALL, EXPR logistic(x2) VAL [\old(x)=0.000009999999747378752] [L847] return 0.5f * tanhf(0.5f * x) + 0.5f; [L855] RET, EXPR logistic(x2) VAL [x1=0.0, x2=0.000009999999747378752, y1=0.5] [L855] float y2 = logistic(x2); [L856] COND TRUE !(__builtin_islessequal(y1, y2)) VAL [x1=0.0, x2=0.000009999999747378752, y1=0.5, y2=0.453125] [L856] reach_error() VAL [x1=0.0, x2=0.000009999999747378752, y1=0.5, y2=0.453125] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.6s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 10 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3 IncrementalHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 10 mSDtfsCounter, 3 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 11 SizeOfPredicates, 0 NumberOfNonLiveVariables, 36 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 2/2 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 21:08:29,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e47c3dd-b559-4a6e-8349-0944f3f95201/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 Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample