./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje --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 8d0e6bdf4ddc5b5e0cadfb452142b6477bf8c78b59a2e6398c4f283004048468 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 07:14:57,981 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 07:14:58,103 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 07:14:58,115 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 07:14:58,118 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 07:14:58,154 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 07:14:58,155 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 07:14:58,156 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 07:14:58,157 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 07:14:58,158 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 07:14:58,158 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 07:14:58,159 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 07:14:58,160 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 07:14:58,160 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 07:14:58,161 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 07:14:58,161 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 07:14:58,162 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 07:14:58,163 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 07:14:58,163 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 07:14:58,164 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 07:14:58,165 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 07:14:58,169 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 07:14:58,170 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 07:14:58,170 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 07:14:58,171 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 07:14:58,171 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 07:14:58,172 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 07:14:58,172 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 07:14:58,176 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 07:14:58,176 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 07:14:58,177 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 07:14:58,177 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 07:14:58,178 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 07:14:58,178 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 07:14:58,179 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 07:14:58,180 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 07:14:58,181 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 07:14:58,181 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 07:14:58,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:14:58,182 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 07:14:58,183 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 07:14:58,183 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 07:14:58,184 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 07:14:58,184 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 07:14:58,185 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 07:14:58,186 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 07:14:58,186 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 07:14:58,187 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_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d0e6bdf4ddc5b5e0cadfb452142b6477bf8c78b59a2e6398c4f283004048468 [2024-11-09 07:14:58,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 07:14:58,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 07:14:58,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 07:14:58,565 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 07:14:58,566 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 07:14:58,567 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin.i Unable to find full path for "g++" [2024-11-09 07:15:00,884 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 07:15:01,192 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 07:15:01,193 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin.i [2024-11-09 07:15:01,203 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/data/440fc823c/f01786fdf87c4b0aa0beacf757bbaf88/FLAG643464138 [2024-11-09 07:15:01,491 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/data/440fc823c/f01786fdf87c4b0aa0beacf757bbaf88 [2024-11-09 07:15:01,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 07:15:01,496 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 07:15:01,498 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 07:15:01,498 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 07:15:01,509 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 07:15:01,510 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:15:01" (1/1) ... [2024-11-09 07:15:01,511 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@517b28bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:01, skipping insertion in model container [2024-11-09 07:15:01,512 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:15:01" (1/1) ... [2024-11-09 07:15:01,541 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 07:15:01,786 WARN L250 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_9f4407a5-18de-4e37-ab6b-1f82c33056fe/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin.i[1564,1577] [2024-11-09 07:15:01,807 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:15:01,821 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 07:15:01,839 WARN L250 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_9f4407a5-18de-4e37-ab6b-1f82c33056fe/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin.i[1564,1577] [2024-11-09 07:15:01,853 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:15:01,875 INFO L204 MainTranslator]: Completed translation [2024-11-09 07:15:01,876 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:01 WrapperNode [2024-11-09 07:15:01,876 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 07:15:01,878 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 07:15:01,878 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 07:15:01,878 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 07:15:01,889 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:01" (1/1) ... [2024-11-09 07:15:01,899 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:01" (1/1) ... [2024-11-09 07:15:01,925 INFO L138 Inliner]: procedures = 19, calls = 63, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2024-11-09 07:15:01,929 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 07:15:01,930 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 07:15:01,930 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 07:15:01,930 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 07:15:01,943 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:01" (1/1) ... [2024-11-09 07:15:01,943 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:01" (1/1) ... [2024-11-09 07:15:01,951 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:01" (1/1) ... [2024-11-09 07:15:01,952 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:01" (1/1) ... [2024-11-09 07:15:01,960 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:01" (1/1) ... [2024-11-09 07:15:01,963 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:01" (1/1) ... [2024-11-09 07:15:01,964 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:01" (1/1) ... [2024-11-09 07:15:01,967 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:01" (1/1) ... [2024-11-09 07:15:01,974 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 07:15:01,975 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 07:15:01,976 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 07:15:01,976 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 07:15:01,979 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:01" (1/1) ... [2024-11-09 07:15:01,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:15:01,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:15:02,016 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 07:15:02,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 07:15:02,066 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_35_to_37_0 [2024-11-09 07:15:02,067 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_35_to_37_0 [2024-11-09 07:15:02,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 07:15:02,067 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-09 07:15:02,068 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-09 07:15:02,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 07:15:02,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 07:15:02,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 07:15:02,071 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_39_to_46_0 [2024-11-09 07:15:02,071 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_39_to_46_0 [2024-11-09 07:15:02,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 07:15:02,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 07:15:02,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 07:15:02,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 07:15:02,073 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 07:15:02,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 07:15:02,238 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 07:15:02,241 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 07:15:02,664 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-09 07:15:02,664 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 07:15:02,769 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 07:15:02,771 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 07:15:02,771 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:15:02 BoogieIcfgContainer [2024-11-09 07:15:02,771 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 07:15:02,780 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 07:15:02,780 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 07:15:02,785 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 07:15:02,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 07:15:01" (1/3) ... [2024-11-09 07:15:02,786 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340c82e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:15:02, skipping insertion in model container [2024-11-09 07:15:02,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:01" (2/3) ... [2024-11-09 07:15:02,786 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340c82e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:15:02, skipping insertion in model container [2024-11-09 07:15:02,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:15:02" (3/3) ... [2024-11-09 07:15:02,788 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_divbin.i [2024-11-09 07:15:02,810 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 07:15:02,810 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 07:15:02,888 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 07:15:02,901 INFO L333 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, 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;@3d0972b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 07:15:02,902 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 07:15:02,907 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 22 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-09 07:15:02,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 07:15:02,916 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:15:02,917 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:15:02,917 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:15:02,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:15:02,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1706594702, now seen corresponding path program 1 times [2024-11-09 07:15:02,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:15:02,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499076048] [2024-11-09 07:15:02,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:15:02,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:15:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:15:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:15:03,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:15:03,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499076048] [2024-11-09 07:15:03,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499076048] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:15:03,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:15:03,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 07:15:03,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330747611] [2024-11-09 07:15:03,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:15:03,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 07:15:03,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:15:03,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 07:15:03,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 07:15:03,312 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 22 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 07:15:03,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:15:03,380 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2024-11-09 07:15:03,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 07:15:03,387 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2024-11-09 07:15:03,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:15:03,397 INFO L225 Difference]: With dead ends: 54 [2024-11-09 07:15:03,397 INFO L226 Difference]: Without dead ends: 31 [2024-11-09 07:15:03,401 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 07:15:03,406 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:15:03,408 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:15:03,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-09 07:15:03,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-09 07:15:03,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 21 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 07:15:03,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-11-09 07:15:03,459 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2024-11-09 07:15:03,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:15:03,463 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-11-09 07:15:03,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 07:15:03,465 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-11-09 07:15:03,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 07:15:03,468 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:15:03,469 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:15:03,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 07:15:03,470 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:15:03,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:15:03,471 INFO L85 PathProgramCache]: Analyzing trace with hash 2098363435, now seen corresponding path program 1 times [2024-11-09 07:15:03,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:15:03,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673182121] [2024-11-09 07:15:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:15:03,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:15:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:15:03,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999425129] [2024-11-09 07:15:03,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:15:03,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:15:03,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:15:03,752 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:15:03,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 07:15:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:15:04,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-09 07:15:04,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:15:04,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2024-11-09 07:15:04,303 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-11-09 07:15:04,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 53 [2024-11-09 07:15:04,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:15:04,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:15:04,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2024-11-09 07:15:04,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2024-11-09 07:15:04,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 07:15:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:15:04,916 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:15:04,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:15:04,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673182121] [2024-11-09 07:15:04,918 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:15:04,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999425129] [2024-11-09 07:15:04,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999425129] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:15:04,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:15:04,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-09 07:15:04,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714360033] [2024-11-09 07:15:04,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:15:04,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 07:15:04,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:15:04,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 07:15:04,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-09 07:15:04,923 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 11 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 07:15:05,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:15:05,557 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2024-11-09 07:15:05,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 07:15:05,558 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-11-09 07:15:05,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:15:05,563 INFO L225 Difference]: With dead ends: 50 [2024-11-09 07:15:05,564 INFO L226 Difference]: Without dead ends: 48 [2024-11-09 07:15:05,566 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-09 07:15:05,567 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:15:05,570 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 110 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 07:15:05,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-09 07:15:05,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2024-11-09 07:15:05,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2024-11-09 07:15:05,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2024-11-09 07:15:05,599 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 22 [2024-11-09 07:15:05,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:15:05,600 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2024-11-09 07:15:05,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 07:15:05,601 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2024-11-09 07:15:05,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 07:15:05,603 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:15:05,603 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:15:05,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 07:15:05,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:15:05,805 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:15:05,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:15:05,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1593884914, now seen corresponding path program 1 times [2024-11-09 07:15:05,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:15:05,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062321901] [2024-11-09 07:15:05,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:15:05,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:15:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:15:05,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320147579] [2024-11-09 07:15:05,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:15:05,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:15:05,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:15:05,995 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:15:05,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 07:15:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:15:06,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-09 07:15:06,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:15:06,919 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-09 07:15:06,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 46 [2024-11-09 07:15:07,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:15:07,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2024-11-09 07:15:07,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2024-11-09 07:15:07,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2024-11-09 07:15:07,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 07:15:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:15:07,636 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:15:09,098 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_127 (Array Int Int)) (|func_to_recursive_line_39_to_46_0_#t~mem2| Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base| v_ArrVal_127))) (= (mod (+ (* (select (select .cse0 |c_ULTIMATE.start_main_~#q~0#1.base|) |c_ULTIMATE.start_main_~#q~0#1.offset|) |func_to_recursive_line_39_to_46_0_#t~mem2|) (select (select .cse0 |c_ULTIMATE.start_main_~#r~0#1.base|) |c_ULTIMATE.start_main_~#r~0#1.offset|)) 4294967296) (mod (select (select .cse0 |c_ULTIMATE.start_main_~#A~0#1.base|) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296)))) is different from false [2024-11-09 07:15:09,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:15:09,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062321901] [2024-11-09 07:15:09,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:15:09,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320147579] [2024-11-09 07:15:09,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320147579] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:15:09,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1295768193] [2024-11-09 07:15:09,149 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-09 07:15:09,150 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:15:09,154 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 07:15:09,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:15:09,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-09 07:15:09,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866384985] [2024-11-09 07:15:09,158 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 07:15:09,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 07:15:09,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:15:09,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 07:15:09,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=404, Unknown=1, NotChecked=40, Total=506 [2024-11-09 07:15:09,161 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 16 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 13 states have internal predecessors, (18), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:15:10,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:15:10,063 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2024-11-09 07:15:10,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 07:15:10,066 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 13 states have internal predecessors, (18), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2024-11-09 07:15:10,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:15:10,068 INFO L225 Difference]: With dead ends: 64 [2024-11-09 07:15:10,068 INFO L226 Difference]: Without dead ends: 62 [2024-11-09 07:15:10,071 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=108, Invalid=651, Unknown=1, NotChecked=52, Total=812 [2024-11-09 07:15:10,072 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:15:10,076 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 126 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 07:15:10,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-09 07:15:10,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2024-11-09 07:15:10,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 32 states have internal predecessors, (33), 10 states have call successors, (10), 6 states have call predecessors, (10), 9 states have return successors, (16), 10 states have call predecessors, (16), 9 states have call successors, (16) [2024-11-09 07:15:10,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2024-11-09 07:15:10,105 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 28 [2024-11-09 07:15:10,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:15:10,106 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2024-11-09 07:15:10,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 13 states have internal predecessors, (18), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:15:10,107 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2024-11-09 07:15:10,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-09 07:15:10,109 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:15:10,110 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:15:10,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 07:15:10,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:15:10,314 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:15:10,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:15:10,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1523288057, now seen corresponding path program 2 times [2024-11-09 07:15:10,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:15:10,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955111201] [2024-11-09 07:15:10,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:15:10,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:15:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:15:10,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381972238] [2024-11-09 07:15:10,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:15:10,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:15:10,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:15:10,604 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:15:10,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 07:15:11,269 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 07:15:11,269 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:15:11,279 WARN L253 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-11-09 07:15:11,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:15:11,339 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-09 07:15:11,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 46 [2024-11-09 07:15:11,430 INFO L349 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2024-11-09 07:15:11,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 72 [2024-11-09 07:15:11,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2024-11-09 07:15:11,494 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:15:11,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2024-11-09 07:15:11,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 18 [2024-11-09 07:15:11,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:15:11,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:15:11,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:15:11,899 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-09 07:15:11,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 36 [2024-11-09 07:15:12,713 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-09 07:15:12,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 51 [2024-11-09 07:15:12,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-11-09 07:15:13,336 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:15:13,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 37 [2024-11-09 07:15:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:15:13,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:15:16,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:15:16,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955111201] [2024-11-09 07:15:16,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:15:16,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381972238] [2024-11-09 07:15:16,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381972238] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:15:16,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1506099948] [2024-11-09 07:15:16,126 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-09 07:15:16,126 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:15:16,127 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 07:15:16,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:15:16,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-11-09 07:15:16,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544131177] [2024-11-09 07:15:16,133 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 07:15:16,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 07:15:16,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:15:16,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 07:15:16,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2024-11-09 07:15:16,138 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 22 states, 16 states have (on average 1.375) internal successors, (22), 18 states have internal predecessors, (22), 6 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-09 07:15:19,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:15:19,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:15:19,789 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2024-11-09 07:15:19,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 07:15:19,790 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.375) internal successors, (22), 18 states have internal predecessors, (22), 6 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 34 [2024-11-09 07:15:19,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:15:19,791 INFO L225 Difference]: With dead ends: 65 [2024-11-09 07:15:19,792 INFO L226 Difference]: Without dead ends: 63 [2024-11-09 07:15:19,793 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 07:15:19,794 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 41 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:15:19,794 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 125 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 402 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2024-11-09 07:15:19,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-09 07:15:19,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 44. [2024-11-09 07:15:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 30 states have internal predecessors, (31), 9 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-09 07:15:19,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2024-11-09 07:15:19,830 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 34 [2024-11-09 07:15:19,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:15:19,830 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2024-11-09 07:15:19,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.375) internal successors, (22), 18 states have internal predecessors, (22), 6 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-09 07:15:19,831 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2024-11-09 07:15:19,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 07:15:19,832 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:15:19,832 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:15:19,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 07:15:20,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:15:20,037 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:15:20,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:15:20,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1196675621, now seen corresponding path program 1 times [2024-11-09 07:15:20,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:15:20,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857459091] [2024-11-09 07:15:20,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:15:20,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:15:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:15:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:15:21,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:15:21,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857459091] [2024-11-09 07:15:21,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857459091] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:15:21,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:15:21,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-09 07:15:21,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046158286] [2024-11-09 07:15:21,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:15:21,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 07:15:21,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:15:21,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 07:15:21,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-09 07:15:21,984 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:15:22,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:15:22,653 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2024-11-09 07:15:22,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 07:15:22,653 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2024-11-09 07:15:22,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:15:22,655 INFO L225 Difference]: With dead ends: 73 [2024-11-09 07:15:22,655 INFO L226 Difference]: Without dead ends: 55 [2024-11-09 07:15:22,655 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2024-11-09 07:15:22,657 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:15:22,657 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 62 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 07:15:22,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-09 07:15:22,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2024-11-09 07:15:22,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.121212121212121) internal successors, (37), 36 states have internal predecessors, (37), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-09 07:15:22,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2024-11-09 07:15:22,694 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 32 [2024-11-09 07:15:22,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:15:22,695 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2024-11-09 07:15:22,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:15:22,695 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2024-11-09 07:15:22,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 07:15:22,698 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:15:22,698 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:15:22,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 07:15:22,699 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:15:22,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:15:22,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1215145147, now seen corresponding path program 1 times [2024-11-09 07:15:22,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:15:22,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86346414] [2024-11-09 07:15:22,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:15:22,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:15:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:15:22,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467828177] [2024-11-09 07:15:22,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:15:22,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:15:22,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:15:22,808 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:15:22,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 07:15:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:15:22,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-09 07:15:22,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:15:23,007 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-11-09 07:15:23,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 53 [2024-11-09 07:15:23,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2024-11-09 07:15:23,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:15:23,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:15:23,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2024-11-09 07:15:23,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2024-11-09 07:15:23,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 07:15:23,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:15:23,389 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:15:23,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:15:23,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86346414] [2024-11-09 07:15:23,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:15:23,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467828177] [2024-11-09 07:15:23,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467828177] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:15:23,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:15:23,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-09 07:15:23,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843133009] [2024-11-09 07:15:23,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:15:23,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 07:15:23,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:15:23,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 07:15:23,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-09 07:15:23,397 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-09 07:15:23,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:15:23,797 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2024-11-09 07:15:23,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 07:15:23,798 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2024-11-09 07:15:23,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:15:23,799 INFO L225 Difference]: With dead ends: 62 [2024-11-09 07:15:23,799 INFO L226 Difference]: Without dead ends: 46 [2024-11-09 07:15:23,800 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-11-09 07:15:23,801 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:15:23,801 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 108 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:15:23,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-09 07:15:23,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-09 07:15:23,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-09 07:15:23,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2024-11-09 07:15:23,825 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 32 [2024-11-09 07:15:23,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:15:23,826 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2024-11-09 07:15:23,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-09 07:15:23,827 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2024-11-09 07:15:23,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-09 07:15:23,831 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:15:23,831 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:15:23,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 07:15:24,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:15:24,032 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:15:24,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:15:24,033 INFO L85 PathProgramCache]: Analyzing trace with hash 106718690, now seen corresponding path program 1 times [2024-11-09 07:15:24,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:15:24,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017643082] [2024-11-09 07:15:24,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:15:24,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:15:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:15:24,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749278861] [2024-11-09 07:15:24,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:15:24,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:15:24,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:15:24,287 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:15:24,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 07:15:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:15:24,962 WARN L253 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 150 conjuncts are in the unsatisfiable core [2024-11-09 07:15:24,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:15:24,996 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-11-09 07:15:24,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 53 [2024-11-09 07:15:25,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:15:25,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2024-11-09 07:15:25,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2024-11-09 07:15:25,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2024-11-09 07:15:26,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:15:26,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:15:26,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:15:26,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 224 treesize of output 204 [2024-11-09 07:15:26,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 410 treesize of output 356 [2024-11-09 07:15:27,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:15:27,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:15:29,447 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 07:15:29,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 168 [2024-11-09 07:15:29,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2024-11-09 07:15:29,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2024-11-09 07:15:29,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2024-11-09 07:15:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 07:15:29,684 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:15:35,040 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse3 (store |c_#memory_int| c_func_to_recursive_line_39_to_46_0_~q.base (let ((.cse12 (select |c_#memory_int| c_func_to_recursive_line_39_to_46_0_~q.base))) (store .cse12 c_func_to_recursive_line_39_to_46_0_~q.offset (* (select .cse12 c_func_to_recursive_line_39_to_46_0_~q.offset) 2)))))) (let ((.cse9 (select .cse3 c_func_to_recursive_line_39_to_46_0_~b.base))) (let ((.cse2 (div (mod (select .cse9 c_func_to_recursive_line_39_to_46_0_~b.offset) 4294967296) 2))) (and (forall ((v_DerPreprocessor_5 (Array Int Int))) (let ((.cse0 (store .cse3 c_func_to_recursive_line_39_to_46_0_~b.base v_DerPreprocessor_5))) (let ((.cse1 (select (select .cse0 c_func_to_recursive_line_39_to_46_0_~r.base) c_func_to_recursive_line_39_to_46_0_~r.offset))) (or (= (mod (+ (* (select v_DerPreprocessor_5 c_func_to_recursive_line_39_to_46_0_~b.offset) (select (select .cse0 c_func_to_recursive_line_39_to_46_0_~q.base) c_func_to_recursive_line_39_to_46_0_~q.offset)) .cse1) 4294967296) (mod (select (select .cse0 c_func_to_recursive_line_39_to_46_0_~A.base) c_func_to_recursive_line_39_to_46_0_~A.offset) 4294967296)) (< .cse2 (+ (mod .cse1 4294967296) 1)))))) (forall ((v_ArrVal_348 (Array Int Int))) (let ((.cse11 (store .cse3 c_func_to_recursive_line_39_to_46_0_~b.base v_ArrVal_348))) (or (let ((.cse7 (store (store |c_#memory_int| c_func_to_recursive_line_39_to_46_0_~b.base (store .cse9 c_func_to_recursive_line_39_to_46_0_~b.offset .cse2)) c_func_to_recursive_line_39_to_46_0_~q.base (let ((.cse10 (select .cse11 c_func_to_recursive_line_39_to_46_0_~q.base))) (store .cse10 c_func_to_recursive_line_39_to_46_0_~q.offset (+ (select .cse10 c_func_to_recursive_line_39_to_46_0_~q.offset) 1)))))) (let ((.cse8 (select .cse7 c_func_to_recursive_line_39_to_46_0_~r.base))) (let ((.cse5 (select (select .cse7 c_func_to_recursive_line_39_to_46_0_~b.base) c_func_to_recursive_line_39_to_46_0_~b.offset)) (.cse6 (select .cse8 c_func_to_recursive_line_39_to_46_0_~r.offset))) (let ((.cse4 (store .cse7 c_func_to_recursive_line_39_to_46_0_~r.base (store .cse8 c_func_to_recursive_line_39_to_46_0_~r.offset (+ (* (- 1) .cse5) .cse6))))) (= (mod (select (select .cse4 c_func_to_recursive_line_39_to_46_0_~A.base) c_func_to_recursive_line_39_to_46_0_~A.offset) 4294967296) (mod (+ (* 4294967295 .cse5) .cse6 (* (select (select .cse4 c_func_to_recursive_line_39_to_46_0_~b.base) c_func_to_recursive_line_39_to_46_0_~b.offset) (select (select .cse4 c_func_to_recursive_line_39_to_46_0_~q.base) c_func_to_recursive_line_39_to_46_0_~q.offset))) 4294967296)))))) (< (mod (select (select .cse11 c_func_to_recursive_line_39_to_46_0_~r.base) c_func_to_recursive_line_39_to_46_0_~r.offset) 4294967296) .cse2)))))))) is different from false [2024-11-09 07:15:36,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:15:36,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017643082] [2024-11-09 07:15:36,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:15:36,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749278861] [2024-11-09 07:15:36,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749278861] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:15:36,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [448066636] [2024-11-09 07:15:36,424 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-09 07:15:36,425 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:15:36,425 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 07:15:36,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:15:36,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-11-09 07:15:36,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773607292] [2024-11-09 07:15:36,426 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 07:15:36,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 07:15:36,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:15:36,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 07:15:36,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=489, Unknown=1, NotChecked=44, Total=600 [2024-11-09 07:15:36,429 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 19 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 7 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-09 07:15:38,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:15:40,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:15:44,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:15:46,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:15:48,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:15:55,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:16:02,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-09 07:16:04,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:16:05,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:16:05,871 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2024-11-09 07:16:05,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 07:16:05,872 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 7 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 38 [2024-11-09 07:16:05,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:16:05,873 INFO L225 Difference]: With dead ends: 79 [2024-11-09 07:16:05,873 INFO L226 Difference]: Without dead ends: 75 [2024-11-09 07:16:05,874 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=140, Invalid=1045, Unknown=9, NotChecked=66, Total=1260 [2024-11-09 07:16:05,875 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 18 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:16:05,875 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 138 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 566 Invalid, 22 Unknown, 0 Unchecked, 19.2s Time] [2024-11-09 07:16:05,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-09 07:16:05,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2024-11-09 07:16:05,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 48 states have internal predecessors, (50), 14 states have call successors, (14), 11 states have call predecessors, (14), 12 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2024-11-09 07:16:05,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2024-11-09 07:16:05,922 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 38 [2024-11-09 07:16:05,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:16:05,923 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2024-11-09 07:16:05,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 7 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-09 07:16:05,923 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2024-11-09 07:16:05,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-09 07:16:05,926 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:16:05,926 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:16:05,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 07:16:06,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:16:06,126 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:16:06,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:16:06,127 INFO L85 PathProgramCache]: Analyzing trace with hash 88249164, now seen corresponding path program 1 times [2024-11-09 07:16:06,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:16:06,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637726557] [2024-11-09 07:16:06,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:16:06,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:16:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:16:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:16:07,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:16:07,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637726557] [2024-11-09 07:16:07,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637726557] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:16:07,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831758405] [2024-11-09 07:16:07,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:16:07,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:16:07,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:16:07,496 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:16:07,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 07:16:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:16:07,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-09 07:16:07,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:16:07,878 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:16:07,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 430 [2024-11-09 07:16:08,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2024-11-09 07:16:08,253 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-09 07:16:08,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 958 treesize of output 942 [2024-11-09 07:16:08,295 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-11-09 07:16:12,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:16:12,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:16:12,793 INFO L349 Elim1Store]: treesize reduction 144, result has 26.5 percent of original size [2024-11-09 07:16:12,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 99 treesize of output 81 [2024-11-09 07:16:12,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:16:12,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:16:12,863 INFO L349 Elim1Store]: treesize reduction 104, result has 1.0 percent of original size [2024-11-09 07:16:12,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 30 [2024-11-09 07:16:17,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 30 [2024-11-09 07:16:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:16:17,322 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:16:22,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831758405] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:16:22,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1193898011] [2024-11-09 07:16:22,339 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-09 07:16:22,340 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:16:22,340 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 07:16:22,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:16:22,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 26 [2024-11-09 07:16:22,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343654138] [2024-11-09 07:16:22,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:16:22,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 07:16:22,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:16:22,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 07:16:22,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1070, Unknown=6, NotChecked=0, Total=1190 [2024-11-09 07:16:22,343 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand has 26 states, 16 states have (on average 2.1875) internal successors, (35), 21 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-09 07:16:25,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:16:27,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:16:29,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:16:31,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:16:35,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:16:37,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-09 07:16:39,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:16:42,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:16:44,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:16:44,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:16:44,751 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2024-11-09 07:16:44,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 07:16:44,752 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 16 states have (on average 2.1875) internal successors, (35), 21 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 38 [2024-11-09 07:16:44,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:16:44,754 INFO L225 Difference]: With dead ends: 79 [2024-11-09 07:16:44,754 INFO L226 Difference]: Without dead ends: 69 [2024-11-09 07:16:44,756 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=266, Invalid=2483, Unknown=7, NotChecked=0, Total=2756 [2024-11-09 07:16:44,757 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 21 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:16:44,757 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 124 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 611 Invalid, 12 Unknown, 0 Unchecked, 19.2s Time] [2024-11-09 07:16:44,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-09 07:16:44,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-11-09 07:16:44,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 46 states have internal predecessors, (48), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) [2024-11-09 07:16:44,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2024-11-09 07:16:44,787 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 38 [2024-11-09 07:16:44,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:16:44,788 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2024-11-09 07:16:44,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 16 states have (on average 2.1875) internal successors, (35), 21 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-09 07:16:44,788 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2024-11-09 07:16:44,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 07:16:44,790 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:16:44,790 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:16:44,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 07:16:44,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:16:44,991 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:16:44,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:16:44,991 INFO L85 PathProgramCache]: Analyzing trace with hash 651907113, now seen corresponding path program 2 times [2024-11-09 07:16:44,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:16:44,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703091539] [2024-11-09 07:16:44,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:16:44,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:16:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:16:45,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729430707] [2024-11-09 07:16:45,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:16:45,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:16:45,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:16:45,316 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:16:45,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4407a5-18de-4e37-ab6b-1f82c33056fe/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 07:16:47,660 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 07:16:47,661 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:16:47,667 WARN L253 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 226 conjuncts are in the unsatisfiable core [2024-11-09 07:16:47,675 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:16:47,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 07:16:47,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 1 [2024-11-09 07:16:47,721 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-11-09 07:16:47,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 53 [2024-11-09 07:16:48,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:16:48,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:16:48,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:16:48,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 41 [2024-11-09 07:16:49,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:16:49,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:16:49,332 INFO L349 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2024-11-09 07:16:49,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 81 [2024-11-09 07:16:49,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2024-11-09 07:16:49,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2024-11-09 07:21:54,287 WARN L286 SmtUtils]: Spent 5.01m on a formula simplification. DAG size of input: 578 DAG size of output: 128 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-09 07:21:54,288 INFO L349 Elim1Store]: treesize reduction 3988, result has 15.3 percent of original size [2024-11-09 07:21:54,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 21 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 26 new quantified variables, introduced 119 case distinctions, treesize of input 3676 treesize of output 4760 [2024-11-09 07:21:55,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 3580 treesize of output 3046 [2024-11-09 07:21:58,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:21:58,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:21:58,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:21:58,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:21:58,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:21:58,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:21:59,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:21:59,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:21:59,819 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:00,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:00,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:00,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:02,453 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= (select v_arrayElimArr_16 func_to_recursive_line_39_to_46_0_~r.base) (select (store (store (store v_arrayElimArr_14 func_to_recursive_line_39_to_46_0_~b.base v_DerPreprocessor_7) func_to_recursive_line_39_to_46_0_~r.base v_DerPreprocessor_8) func_to_recursive_line_39_to_46_0_~q.base v_arrayElimArr_33) func_to_recursive_line_39_to_46_0_~b.base)) [2024-11-09 07:22:03,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:04,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:05,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:06,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:06,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:08,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:09,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:09,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:10,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:10,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:11,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:13,820 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= (select v_arrayElimArr_14 func_to_recursive_line_39_to_46_0_~r.base) (select v_arrayElimArr_16 func_to_recursive_line_39_to_46_0_~r.base)) [2024-11-09 07:22:14,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:14,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:17,521 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= (select v_arrayElimArr_16 func_to_recursive_line_39_to_46_0_~r.base) (select v_arrayElimArr_32 func_to_recursive_line_39_to_46_0_~r.base)) [2024-11-09 07:22:19,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:19,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:19,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:19,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:20,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:20,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:20,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:22,796 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= (select (store (store (store v_arrayElimArr_14 func_to_recursive_line_39_to_46_0_~b.base v_DerPreprocessor_7) func_to_recursive_line_39_to_46_0_~r.base v_DerPreprocessor_8) func_to_recursive_line_39_to_46_0_~q.base v_arrayElimArr_33) func_to_recursive_line_39_to_46_0_~r.base) (select v_arrayElimArr_17 func_to_recursive_line_39_to_46_0_~q.base)) [2024-11-09 07:22:24,797 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= (select v_arrayElimArr_17 func_to_recursive_line_39_to_46_0_~r.base) (select (store (store (store v_arrayElimArr_14 func_to_recursive_line_39_to_46_0_~b.base v_DerPreprocessor_7) func_to_recursive_line_39_to_46_0_~r.base v_DerPreprocessor_8) func_to_recursive_line_39_to_46_0_~q.base v_arrayElimArr_33) func_to_recursive_line_39_to_46_0_~r.base)) [2024-11-09 07:22:24,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:26,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:26,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:26,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:26,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:28,823 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= (select (store (store (store v_arrayElimArr_14 func_to_recursive_line_39_to_46_0_~b.base v_DerPreprocessor_7) func_to_recursive_line_39_to_46_0_~r.base v_DerPreprocessor_8) func_to_recursive_line_39_to_46_0_~q.base v_arrayElimArr_33) func_to_recursive_line_39_to_46_0_~r.base) (select v_arrayElimArr_28 func_to_recursive_line_39_to_46_0_~q.base)) [2024-11-09 07:22:32,420 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= (select (store (store (store v_arrayElimArr_14 func_to_recursive_line_39_to_46_0_~b.base v_DerPreprocessor_7) func_to_recursive_line_39_to_46_0_~r.base v_DerPreprocessor_8) func_to_recursive_line_39_to_46_0_~q.base v_arrayElimArr_33) func_to_recursive_line_39_to_46_0_~r.base) (select v_arrayElimArr_24 func_to_recursive_line_39_to_46_0_~q.base)) [2024-11-09 07:22:34,425 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= (select (store (store (store v_arrayElimArr_14 func_to_recursive_line_39_to_46_0_~b.base v_DerPreprocessor_7) func_to_recursive_line_39_to_46_0_~r.base v_DerPreprocessor_8) func_to_recursive_line_39_to_46_0_~q.base v_arrayElimArr_33) func_to_recursive_line_39_to_46_0_~r.base) (select v_arrayElimArr_24 func_to_recursive_line_39_to_46_0_~q.base)) [2024-11-09 07:22:35,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:38,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:38,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:40,606 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= (select (store (store (store v_arrayElimArr_14 func_to_recursive_line_39_to_46_0_~b.base v_DerPreprocessor_7) func_to_recursive_line_39_to_46_0_~r.base v_DerPreprocessor_8) func_to_recursive_line_39_to_46_0_~q.base v_arrayElimArr_33) func_to_recursive_line_39_to_46_0_~r.base) (select v_arrayElimArr_32 func_to_recursive_line_39_to_46_0_~q.base)) [2024-11-09 07:22:41,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:41,156 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:41,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:41,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:41,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:41,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:42,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:42,750 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:42,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:43,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:43,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:43,287 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:45,468 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= (select v_arrayElimArr_17 func_to_recursive_line_39_to_46_0_~r.base) (select v_arrayElimArr_23 func_to_recursive_line_39_to_46_0_~b.base)) [2024-11-09 07:22:45,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:45,471 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:46,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:46,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:46,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:46,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:46,778 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:47,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:47,311 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:47,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:47,764 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:48,095 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:48,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:48,373 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:48,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:48,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:48,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:48,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:48,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:49,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:49,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:49,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:49,494 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:49,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:49,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:49,736 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:49,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:49,980 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:50,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:50,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:50,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:50,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:50,380 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:50,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:50,678 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:50,680 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:50,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:50,702 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:50,703 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:50,867 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:51,436 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:51,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:51,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:51,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:51,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:51,789 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:51,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:51,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:52,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:52,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:52,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:52,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:52,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:53,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:53,107 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:54,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:54,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:54,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:54,793 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:54,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:55,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:55,435 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:22:55,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:55,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:55,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:22:58,359 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= (select v_arrayElimArr_23 func_to_recursive_line_39_to_46_0_~r.base) (select (store (store (store v_arrayElimArr_14 func_to_recursive_line_39_to_46_0_~b.base v_DerPreprocessor_7) func_to_recursive_line_39_to_46_0_~r.base v_DerPreprocessor_8) func_to_recursive_line_39_to_46_0_~q.base v_arrayElimArr_33) func_to_recursive_line_39_to_46_0_~b.base)) [2024-11-09 07:23:00,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:23:00,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:23:00,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:23:02,996 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= (select v_arrayElimArr_14 func_to_recursive_line_39_to_46_0_~r.base) (select v_arrayElimArr_23 func_to_recursive_line_39_to_46_0_~r.base)) [2024-11-09 07:23:05,000 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= (select v_arrayElimArr_23 func_to_recursive_line_39_to_46_0_~r.base) (select v_arrayElimArr_22 func_to_recursive_line_39_to_46_0_~r.base)) [2024-11-09 07:23:05,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:23:06,332 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:23:06,376 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:23:06,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:23:06,415 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:23:08,456 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= (select v_arrayElimArr_31 func_to_recursive_line_39_to_46_0_~r.base) (select v_arrayElimArr_30 func_to_recursive_line_39_to_46_0_~b.base)) [2024-11-09 07:23:08,457 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:23:09,031 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:23:09,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:23:09,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:23:09,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:23:09,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:23:09,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:23:09,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:23:09,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:23:09,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:23:09,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:23:10,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:23:10,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:23:10,065 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:23:10,067 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:23:10,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:23:12,586 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= (select v_arrayElimArr_31 func_to_recursive_line_39_to_46_0_~r.base) (select v_arrayElimArr_26 func_to_recursive_line_39_to_46_0_~r.base)) [2024-11-09 07:23:14,884 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= (let ((.cse0 (select (store (store (store v_arrayElimArr_14 func_to_recursive_line_39_to_46_0_~b.base v_DerPreprocessor_7) func_to_recursive_line_39_to_46_0_~r.base v_DerPreprocessor_8) func_to_recursive_line_39_to_46_0_~q.base v_arrayElimArr_33) func_to_recursive_line_39_to_46_0_~r.base))) (store .cse0 0 (+ (select .cse0 0) (- 1)))) (select v_arrayElimArr_26 func_to_recursive_line_39_to_46_0_~r.base)) [2024-11-09 07:23:15,423 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:23:15,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:23:15,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:23:15,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:23:15,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:23:16,239 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:23:16,545 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:23:17,344 INFO L224 Elim1Store]: Index analysis took 78518 ms [2024-11-09 07:23:17,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 18 stores, 3 select indices, 3 select index equivalence classes, 50 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 1997 treesize of output 7385 [2024-11-09 07:23:57,570 WARN L286 SmtUtils]: Spent 7.67s on a formula simplification that was a NOOP. DAG size: 212 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:24:25,801 WARN L286 SmtUtils]: Spent 11.29s on a formula simplification that was a NOOP. DAG size: 212 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:24:54,237 WARN L286 SmtUtils]: Spent 11.25s on a formula simplification that was a NOOP. DAG size: 212 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:24:54,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:54,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:54,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:54,907 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-11-09 07:24:54,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 17228 treesize of output 17170 [2024-11-09 07:24:55,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 2794 treesize of output 2693 [2024-11-09 07:24:56,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:24:56,552 INFO L224 Elim1Store]: Index analysis took 198 ms [2024-11-09 07:24:56,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 11 stores, 1 select indices, 1 select index equivalence classes, 41 disjoint index pairs (out of 0 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 2998 treesize of output 2819 [2024-11-09 07:24:58,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 9 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 2100 treesize of output 2180 [2024-11-09 07:25:04,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 85 [2024-11-09 07:25:05,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 110 [2024-11-09 07:25:11,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 7 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 294 treesize of output 357 [2024-11-09 07:25:11,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-09 07:25:11,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 111 [2024-11-09 07:25:11,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 102 [2024-11-09 07:25:11,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:25:11,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 78 [2024-11-09 07:25:11,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2024-11-09 07:25:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:25:12,690 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:26:33,056 WARN L286 SmtUtils]: Spent 5.14s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:27:06,350 WARN L286 SmtUtils]: Spent 7.15s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:27:06,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:27:06,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703091539] [2024-11-09 07:27:06,352 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:27:06,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729430707] [2024-11-09 07:27:06,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729430707] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:27:06,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [449551164] [2024-11-09 07:27:06,355 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-09 07:27:06,356 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:27:06,356 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 07:27:06,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:27:06,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-11-09 07:27:06,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895441602] [2024-11-09 07:27:06,357 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 07:27:06,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 07:27:06,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:27:06,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 07:27:06,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1214, Unknown=14, NotChecked=0, Total=1332 [2024-11-09 07:27:06,360 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 27 states, 19 states have (on average 1.368421052631579) internal successors, (26), 21 states have internal predecessors, (26), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 07:27:34,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:27:35,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:27:37,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:27:39,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:27:41,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:27:43,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:27:45,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:28:03,606 WARN L286 SmtUtils]: Spent 12.54s on a formula simplification that was a NOOP. DAG size: 214 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:28:05,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]