./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_1.c --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_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/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_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/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_f23ef204-fdc5-458a-9cb5-1b88671e612b/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 a899e425fabfbfedb683b8dde873d61190b064645b1f5edf26c70c4b83dfe4a2 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 04:47:15,698 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 04:47:15,800 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 04:47:15,805 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 04:47:15,809 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 04:47:15,851 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 04:47:15,852 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 04:47:15,852 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 04:47:15,855 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 04:47:15,855 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 04:47:15,857 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 04:47:15,857 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 04:47:15,858 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 04:47:15,860 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 04:47:15,861 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 04:47:15,861 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 04:47:15,861 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 04:47:15,862 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 04:47:15,862 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 04:47:15,862 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 04:47:15,863 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 04:47:15,867 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 04:47:15,868 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 04:47:15,868 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 04:47:15,869 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 04:47:15,869 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 04:47:15,869 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 04:47:15,869 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 04:47:15,870 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 04:47:15,870 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 04:47:15,870 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 04:47:15,870 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 04:47:15,871 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 04:47:15,871 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 04:47:15,871 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 04:47:15,872 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 04:47:15,872 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 04:47:15,873 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 04:47:15,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:47:15,873 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 04:47:15,873 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 04:47:15,874 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 04:47:15,874 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 04:47:15,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 04:47:15,875 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 04:47:15,875 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 04:47:15,875 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 04:47:15,876 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_f23ef204-fdc5-458a-9cb5-1b88671e612b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a899e425fabfbfedb683b8dde873d61190b064645b1f5edf26c70c4b83dfe4a2 [2024-11-09 04:47:16,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:47:16,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:47:16,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:47:16,217 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:47:16,217 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:47:16,218 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-programs/partial_mod_count_1.c Unable to find full path for "g++" [2024-11-09 04:47:18,237 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:47:18,492 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:47:18,492 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/sv-benchmarks/c/array-programs/partial_mod_count_1.c [2024-11-09 04:47:18,501 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/data/f9e271fa5/c28ec8f5c3304c9d93715ec39a76ca99/FLAGcbb49525a [2024-11-09 04:47:18,814 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/data/f9e271fa5/c28ec8f5c3304c9d93715ec39a76ca99 [2024-11-09 04:47:18,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:47:18,818 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:47:18,820 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:47:18,820 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:47:18,828 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:47:18,831 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:47:18" (1/1) ... [2024-11-09 04:47:18,832 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aadadae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:18, skipping insertion in model container [2024-11-09 04:47:18,833 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:47:18" (1/1) ... [2024-11-09 04:47:18,859 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:47:19,024 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_f23ef204-fdc5-458a-9cb5-1b88671e612b/sv-benchmarks/c/array-programs/partial_mod_count_1.c[323,336] [2024-11-09 04:47:19,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:47:19,053 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:47:19,066 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_f23ef204-fdc5-458a-9cb5-1b88671e612b/sv-benchmarks/c/array-programs/partial_mod_count_1.c[323,336] [2024-11-09 04:47:19,073 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:47:19,091 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:47:19,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:19 WrapperNode [2024-11-09 04:47:19,091 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:47:19,092 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:47:19,093 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:47:19,093 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:47:19,101 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:19" (1/1) ... [2024-11-09 04:47:19,108 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:19" (1/1) ... [2024-11-09 04:47:19,126 INFO L138 Inliner]: procedures = 13, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2024-11-09 04:47:19,126 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:47:19,127 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:47:19,127 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:47:19,128 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:47:19,139 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:19" (1/1) ... [2024-11-09 04:47:19,142 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:19" (1/1) ... [2024-11-09 04:47:19,143 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:19" (1/1) ... [2024-11-09 04:47:19,148 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:19" (1/1) ... [2024-11-09 04:47:19,153 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:19" (1/1) ... [2024-11-09 04:47:19,158 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:19" (1/1) ... [2024-11-09 04:47:19,161 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:19" (1/1) ... [2024-11-09 04:47:19,162 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:19" (1/1) ... [2024-11-09 04:47:19,166 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:47:19,167 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:47:19,168 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:47:19,168 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:47:19,169 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:19" (1/1) ... [2024-11-09 04:47:19,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:47:19,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:47:19,208 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:47:19,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:47:19,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 04:47:19,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 04:47:19,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 04:47:19,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 04:47:19,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:47:19,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:47:19,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 04:47:19,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 04:47:19,337 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:47:19,339 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:47:19,579 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-09 04:47:19,579 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:47:19,662 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:47:19,664 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 04:47:19,664 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:47:19 BoogieIcfgContainer [2024-11-09 04:47:19,665 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:47:19,667 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:47:19,669 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:47:19,673 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:47:19,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:47:18" (1/3) ... [2024-11-09 04:47:19,674 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29dc1391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:47:19, skipping insertion in model container [2024-11-09 04:47:19,674 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:47:19" (2/3) ... [2024-11-09 04:47:19,674 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29dc1391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:47:19, skipping insertion in model container [2024-11-09 04:47:19,674 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:47:19" (3/3) ... [2024-11-09 04:47:19,676 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_1.c [2024-11-09 04:47:19,699 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:47:19,700 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 04:47:19,786 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:47:19,797 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;@7ac539dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:47:19,799 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 04:47:19,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:19,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 04:47:19,810 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:47:19,811 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:47:19,811 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:47:19,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:47:19,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1384647583, now seen corresponding path program 1 times [2024-11-09 04:47:19,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:47:19,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353348513] [2024-11-09 04:47:19,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:19,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:47:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:47:20,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:47:20,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353348513] [2024-11-09 04:47:20,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353348513] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:47:20,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:47:20,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:47:20,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946981074] [2024-11-09 04:47:20,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:47:20,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:47:20,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:47:20,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:47:20,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:47:20,206 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:20,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:47:20,259 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2024-11-09 04:47:20,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:47:20,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 04:47:20,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:47:20,272 INFO L225 Difference]: With dead ends: 23 [2024-11-09 04:47:20,272 INFO L226 Difference]: Without dead ends: 12 [2024-11-09 04:47:20,275 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:47:20,279 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:47:20,280 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:47:20,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-09 04:47:20,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-11-09 04:47:20,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:20,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2024-11-09 04:47:20,333 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2024-11-09 04:47:20,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:47:20,334 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2024-11-09 04:47:20,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:20,334 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2024-11-09 04:47:20,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 04:47:20,335 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:47:20,335 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:47:20,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 04:47:20,336 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:47:20,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:47:20,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1010846951, now seen corresponding path program 1 times [2024-11-09 04:47:20,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:47:20,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143236326] [2024-11-09 04:47:20,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:20,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:47:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:47:20,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:47:20,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143236326] [2024-11-09 04:47:20,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143236326] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:47:20,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997760196] [2024-11-09 04:47:20,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:20,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:47:20,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:47:20,621 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:47:20,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 04:47:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:20,723 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 04:47:20,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:47:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:47:20,842 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:47:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:47:20,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997760196] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:47:20,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [850419177] [2024-11-09 04:47:20,905 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 04:47:20,905 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:47:20,909 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:47:20,916 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:47:20,917 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:47:21,852 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:47:22,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [850419177] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:47:22,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:47:22,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 12 [2024-11-09 04:47:22,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712602185] [2024-11-09 04:47:22,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:47:22,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 04:47:22,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:47:22,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 04:47:22,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-11-09 04:47:22,071 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:22,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:47:22,138 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2024-11-09 04:47:22,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:47:22,139 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-09 04:47:22,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:47:22,140 INFO L225 Difference]: With dead ends: 17 [2024-11-09 04:47:22,140 INFO L226 Difference]: Without dead ends: 15 [2024-11-09 04:47:22,140 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-11-09 04:47:22,142 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:47:22,142 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:47:22,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-09 04:47:22,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-09 04:47:22,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-11-09 04:47:22,152 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2024-11-09 04:47:22,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:47:22,152 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-11-09 04:47:22,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:22,153 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-11-09 04:47:22,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 04:47:22,153 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:47:22,153 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:47:22,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 04:47:22,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:47:22,355 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:47:22,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:47:22,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1326847234, now seen corresponding path program 1 times [2024-11-09 04:47:22,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:47:22,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95015909] [2024-11-09 04:47:22,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:22,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:47:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 04:47:22,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:47:22,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95015909] [2024-11-09 04:47:22,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95015909] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:47:22,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587953834] [2024-11-09 04:47:22,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:22,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:47:22,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:47:22,554 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:47:22,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 04:47:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:22,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 04:47:22,635 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:47:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 04:47:22,699 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:47:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 04:47:22,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587953834] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:47:22,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [600936883] [2024-11-09 04:47:22,728 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 04:47:22,728 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:47:22,733 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:47:22,733 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:47:22,734 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:47:23,540 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:47:23,881 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '243#(and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) ~N~0) (or (and (= |ULTIMATE.start_main_~j~0#1| (div ~N~0 2)) (or (< 0 (+ ~N~0 1)) (= (mod ~N~0 2) 0))) (< (div ~N~0 2) |ULTIMATE.start_main_~j~0#1|)))' at error location [2024-11-09 04:47:23,882 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:47:23,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:47:23,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-09 04:47:23,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495680449] [2024-11-09 04:47:23,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:47:23,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 04:47:23,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:47:23,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 04:47:23,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-11-09 04:47:23,884 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:23,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:47:23,948 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2024-11-09 04:47:23,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:47:23,950 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 04:47:23,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:47:23,951 INFO L225 Difference]: With dead ends: 30 [2024-11-09 04:47:23,951 INFO L226 Difference]: Without dead ends: 20 [2024-11-09 04:47:23,952 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-11-09 04:47:23,953 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:47:23,953 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 15 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:47:23,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-09 04:47:23,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-09 04:47:23,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:23,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2024-11-09 04:47:23,961 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2024-11-09 04:47:23,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:47:23,962 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2024-11-09 04:47:23,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:23,964 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2024-11-09 04:47:23,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 04:47:23,965 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:47:23,965 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:47:23,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 04:47:24,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:47:24,166 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:47:24,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:47:24,167 INFO L85 PathProgramCache]: Analyzing trace with hash -661769364, now seen corresponding path program 2 times [2024-11-09 04:47:24,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:47:24,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973197906] [2024-11-09 04:47:24,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:24,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:47:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 04:47:24,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:47:24,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973197906] [2024-11-09 04:47:24,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973197906] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:47:24,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179265954] [2024-11-09 04:47:24,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:47:24,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:47:24,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:47:24,467 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:47:24,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 04:47:24,545 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 04:47:24,545 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:47:24,546 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 04:47:24,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:47:24,817 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:47:24,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 70 treesize of output 62 [2024-11-09 04:47:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 04:47:24,898 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:47:25,275 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:47:25,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 119 treesize of output 111 [2024-11-09 04:47:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 04:47:25,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179265954] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:47:25,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [111865793] [2024-11-09 04:47:25,589 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 04:47:25,589 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:47:25,590 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:47:25,590 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:47:25,590 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:47:26,139 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:47:26,494 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '437#(and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) ~N~0) (or (and (= |ULTIMATE.start_main_~j~0#1| (div ~N~0 2)) (or (< 0 (+ ~N~0 1)) (= (mod ~N~0 2) 0))) (< (div ~N~0 2) |ULTIMATE.start_main_~j~0#1|)))' at error location [2024-11-09 04:47:26,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:47:26,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:47:26,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2024-11-09 04:47:26,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157056470] [2024-11-09 04:47:26,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:47:26,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 04:47:26,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:47:26,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 04:47:26,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-09 04:47:26,499 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:27,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:47:27,207 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2024-11-09 04:47:27,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 04:47:27,208 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-09 04:47:27,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:47:27,209 INFO L225 Difference]: With dead ends: 52 [2024-11-09 04:47:27,210 INFO L226 Difference]: Without dead ends: 42 [2024-11-09 04:47:27,211 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 04:47:27,213 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 35 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:47:27,213 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 21 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:47:27,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-09 04:47:27,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2024-11-09 04:47:27,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:27,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2024-11-09 04:47:27,227 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 19 [2024-11-09 04:47:27,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:47:27,227 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2024-11-09 04:47:27,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:27,228 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2024-11-09 04:47:27,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 04:47:27,229 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:47:27,229 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2024-11-09 04:47:27,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 04:47:27,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:47:27,436 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:47:27,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:47:27,438 INFO L85 PathProgramCache]: Analyzing trace with hash 704061589, now seen corresponding path program 3 times [2024-11-09 04:47:27,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:47:27,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606003072] [2024-11-09 04:47:27,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:27,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:47:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 04:47:27,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:47:27,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606003072] [2024-11-09 04:47:27,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606003072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:47:27,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261580128] [2024-11-09 04:47:27,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:47:27,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:47:27,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:47:27,763 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:47:27,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 04:47:27,855 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:47:27,855 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:47:27,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 04:47:27,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:47:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 04:47:27,968 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:47:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 04:47:28,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261580128] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:47:28,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1709412920] [2024-11-09 04:47:28,093 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 04:47:28,094 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:47:28,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:47:28,094 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:47:28,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:47:28,470 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:47:28,783 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) ~N~0) (or (and (= |ULTIMATE.start_main_~j~0#1| (div ~N~0 2)) (or (< 0 (+ ~N~0 1)) (= (mod ~N~0 2) 0))) (< (div ~N~0 2) |ULTIMATE.start_main_~j~0#1|)))' at error location [2024-11-09 04:47:28,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:47:28,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:47:28,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-09 04:47:28,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630710242] [2024-11-09 04:47:28,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:47:28,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 04:47:28,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:47:28,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 04:47:28,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2024-11-09 04:47:28,786 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:28,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:47:28,900 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2024-11-09 04:47:28,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 04:47:28,901 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-09 04:47:28,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:47:28,902 INFO L225 Difference]: With dead ends: 70 [2024-11-09 04:47:28,902 INFO L226 Difference]: Without dead ends: 48 [2024-11-09 04:47:28,902 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2024-11-09 04:47:28,903 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:47:28,903 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 15 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:47:28,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-09 04:47:28,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-09 04:47:28,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:28,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-11-09 04:47:28,912 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 33 [2024-11-09 04:47:28,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:47:28,912 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-11-09 04:47:28,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:28,913 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-11-09 04:47:28,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 04:47:28,914 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:47:28,914 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2024-11-09 04:47:28,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 04:47:29,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:47:29,118 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:47:29,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:47:29,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1380490475, now seen corresponding path program 4 times [2024-11-09 04:47:29,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:47:29,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790245353] [2024-11-09 04:47:29,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:29,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:47:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 04:47:29,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:47:29,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790245353] [2024-11-09 04:47:29,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790245353] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:47:29,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123643857] [2024-11-09 04:47:29,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:47:29,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:47:29,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:47:29,875 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:47:29,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 04:47:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:29,998 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 04:47:30,000 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:47:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 04:47:30,293 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:47:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 04:47:30,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123643857] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:47:30,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1339993135] [2024-11-09 04:47:30,715 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 04:47:30,716 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:47:30,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:47:30,717 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:47:30,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:47:31,108 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:47:31,475 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1280#(and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) ~N~0) (or (and (= |ULTIMATE.start_main_~j~0#1| (div ~N~0 2)) (or (< 0 (+ ~N~0 1)) (= (mod ~N~0 2) 0))) (< (div ~N~0 2) |ULTIMATE.start_main_~j~0#1|)))' at error location [2024-11-09 04:47:31,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:47:31,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:47:31,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2024-11-09 04:47:31,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931358591] [2024-11-09 04:47:31,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:47:31,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-09 04:47:31,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:47:31,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-09 04:47:31,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=776, Invalid=1480, Unknown=0, NotChecked=0, Total=2256 [2024-11-09 04:47:31,480 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 40 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:31,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:47:31,736 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2024-11-09 04:47:31,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 04:47:31,736 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 40 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-11-09 04:47:31,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:47:31,737 INFO L225 Difference]: With dead ends: 98 [2024-11-09 04:47:31,737 INFO L226 Difference]: Without dead ends: 76 [2024-11-09 04:47:31,739 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=776, Invalid=1480, Unknown=0, NotChecked=0, Total=2256 [2024-11-09 04:47:31,739 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:47:31,740 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:47:31,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-09 04:47:31,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-09 04:47:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:31,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2024-11-09 04:47:31,754 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 47 [2024-11-09 04:47:31,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:47:31,755 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2024-11-09 04:47:31,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 40 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:31,755 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2024-11-09 04:47:31,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-09 04:47:31,757 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:47:31,757 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2024-11-09 04:47:31,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 04:47:31,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 04:47:31,958 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:47:31,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:47:31,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1738733033, now seen corresponding path program 5 times [2024-11-09 04:47:31,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:47:31,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805204537] [2024-11-09 04:47:31,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:31,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:47:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:34,195 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 04:47:34,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:47:34,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805204537] [2024-11-09 04:47:34,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805204537] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:47:34,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461489102] [2024-11-09 04:47:34,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:47:34,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:47:34,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:47:34,198 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:47:34,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 04:47:34,391 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 04:47:34,391 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:47:34,393 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 04:47:34,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:47:35,784 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:47:35,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 116 treesize of output 180 [2024-11-09 04:47:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2024-11-09 04:47:36,053 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:47:39,847 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:47:39,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 415 treesize of output 567 [2024-11-09 04:47:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2024-11-09 04:47:46,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461489102] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:47:46,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [96254289] [2024-11-09 04:47:46,400 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 04:47:46,400 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:47:46,400 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:47:46,400 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:47:46,401 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:47:46,789 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:47:47,283 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2019#(and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) ~N~0) (or (and (= |ULTIMATE.start_main_~j~0#1| (div ~N~0 2)) (or (< 0 (+ ~N~0 1)) (= (mod ~N~0 2) 0))) (< (div ~N~0 2) |ULTIMATE.start_main_~j~0#1|)))' at error location [2024-11-09 04:47:47,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:47:47,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:47:47,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 9, 9] total 44 [2024-11-09 04:47:47,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484482133] [2024-11-09 04:47:47,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:47:47,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-09 04:47:47,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:47:47,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-09 04:47:47,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=2080, Unknown=0, NotChecked=0, Total=2652 [2024-11-09 04:47:47,288 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:51,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:47:51,952 INFO L93 Difference]: Finished difference Result 228 states and 236 transitions. [2024-11-09 04:47:51,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-09 04:47:51,953 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2024-11-09 04:47:51,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:47:51,954 INFO L225 Difference]: With dead ends: 228 [2024-11-09 04:47:51,954 INFO L226 Difference]: Without dead ends: 206 [2024-11-09 04:47:51,961 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2374 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=3082, Invalid=8260, Unknown=0, NotChecked=0, Total=11342 [2024-11-09 04:47:51,962 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 305 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:47:51,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 77 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 04:47:51,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-09 04:47:51,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 102. [2024-11-09 04:47:51,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:51,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2024-11-09 04:47:51,995 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 75 [2024-11-09 04:47:51,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:47:51,996 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2024-11-09 04:47:51,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:51,996 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2024-11-09 04:47:51,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-09 04:47:51,998 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:47:51,998 INFO L215 NwaCegarLoop]: trace histogram [27, 27, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2024-11-09 04:47:52,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 04:47:52,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:47:52,199 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:47:52,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:47:52,200 INFO L85 PathProgramCache]: Analyzing trace with hash -681062801, now seen corresponding path program 6 times [2024-11-09 04:47:52,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:47:52,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980472084] [2024-11-09 04:47:52,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:52,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:47:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:47:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 04:47:54,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:47:54,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980472084] [2024-11-09 04:47:54,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980472084] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:47:54,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094765157] [2024-11-09 04:47:54,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:47:54,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:47:54,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:47:54,797 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:47:54,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 04:47:55,037 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:47:55,037 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:47:55,046 INFO L255 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 04:47:55,054 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:47:55,882 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 04:47:55,885 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:47:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 04:47:57,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094765157] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:47:57,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [243275232] [2024-11-09 04:47:57,325 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 04:47:57,325 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:47:57,326 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:47:57,326 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:47:57,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:47:57,664 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:47:58,031 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3252#(and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) ~N~0) (or (and (= |ULTIMATE.start_main_~j~0#1| (div ~N~0 2)) (or (< 0 (+ ~N~0 1)) (= (mod ~N~0 2) 0))) (< (div ~N~0 2) |ULTIMATE.start_main_~j~0#1|)))' at error location [2024-11-09 04:47:58,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:47:58,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:47:58,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 85 [2024-11-09 04:47:58,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426066999] [2024-11-09 04:47:58,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:47:58,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-09 04:47:58,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:47:58,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-09 04:47:58,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3326, Invalid=5230, Unknown=0, NotChecked=0, Total=8556 [2024-11-09 04:47:58,037 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 85 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:58,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:47:58,418 INFO L93 Difference]: Finished difference Result 206 states and 236 transitions. [2024-11-09 04:47:58,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-09 04:47:58,419 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 85 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2024-11-09 04:47:58,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:47:58,420 INFO L225 Difference]: With dead ends: 206 [2024-11-09 04:47:58,420 INFO L226 Difference]: Without dead ends: 160 [2024-11-09 04:47:58,423 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4024 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3326, Invalid=5230, Unknown=0, NotChecked=0, Total=8556 [2024-11-09 04:47:58,424 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:47:58,424 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:47:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-09 04:47:58,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2024-11-09 04:47:58,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:58,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2024-11-09 04:47:58,450 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 101 [2024-11-09 04:47:58,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:47:58,451 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2024-11-09 04:47:58,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 85 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:47:58,451 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2024-11-09 04:47:58,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-09 04:47:58,454 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:47:58,454 INFO L215 NwaCegarLoop]: trace histogram [56, 56, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2024-11-09 04:47:58,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 04:47:58,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:47:58,658 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:47:58,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:47:58,659 INFO L85 PathProgramCache]: Analyzing trace with hash -294286143, now seen corresponding path program 7 times [2024-11-09 04:47:58,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:47:58,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391186996] [2024-11-09 04:47:58,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:47:58,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:47:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3346 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 04:48:05,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:48:05,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391186996] [2024-11-09 04:48:05,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391186996] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:48:05,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857234283] [2024-11-09 04:48:05,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:48:05,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:48:05,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:48:05,181 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:48:05,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 04:48:05,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:05,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-09 04:48:05,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:48:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3346 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 04:48:07,636 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:48:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3346 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 04:48:12,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857234283] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:48:12,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [599640835] [2024-11-09 04:48:12,620 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 04:48:12,620 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:48:12,621 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:48:12,621 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:48:12,621 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:48:13,026 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:48:13,625 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4893#(and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) ~N~0) (or (and (= |ULTIMATE.start_main_~j~0#1| (div ~N~0 2)) (or (< 0 (+ ~N~0 1)) (= (mod ~N~0 2) 0))) (< (div ~N~0 2) |ULTIMATE.start_main_~j~0#1|)))' at error location [2024-11-09 04:48:13,625 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:48:13,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:48:13,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 172 [2024-11-09 04:48:13,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841880419] [2024-11-09 04:48:13,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:48:13,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2024-11-09 04:48:13,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:48:13,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2024-11-09 04:48:13,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13360, Invalid=18860, Unknown=0, NotChecked=0, Total=32220 [2024-11-09 04:48:13,636 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 173 states, 173 states have (on average 2.0173410404624277) internal successors, (349), 172 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:14,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:48:14,553 INFO L93 Difference]: Finished difference Result 322 states and 381 transitions. [2024-11-09 04:48:14,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-11-09 04:48:14,554 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 2.0173410404624277) internal successors, (349), 172 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2024-11-09 04:48:14,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:48:14,556 INFO L225 Difference]: With dead ends: 322 [2024-11-09 04:48:14,556 INFO L226 Difference]: Without dead ends: 276 [2024-11-09 04:48:14,558 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14812 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=13360, Invalid=18860, Unknown=0, NotChecked=0, Total=32220 [2024-11-09 04:48:14,559 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 04:48:14,559 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 36 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 04:48:14,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2024-11-09 04:48:14,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2024-11-09 04:48:14,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.0072727272727273) internal successors, (277), 275 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 277 transitions. [2024-11-09 04:48:14,595 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 277 transitions. Word has length 159 [2024-11-09 04:48:14,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:48:14,596 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 277 transitions. [2024-11-09 04:48:14,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 2.0173410404624277) internal successors, (349), 172 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:14,597 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 277 transitions. [2024-11-09 04:48:14,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2024-11-09 04:48:14,601 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:48:14,602 INFO L215 NwaCegarLoop]: trace histogram [114, 114, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2024-11-09 04:48:14,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 04:48:14,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:48:14,803 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:48:14,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:48:14,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2023320037, now seen corresponding path program 8 times [2024-11-09 04:48:14,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:48:14,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585816439] [2024-11-09 04:48:14,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:48:14,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:48:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13206 backedges. 0 proven. 12996 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 04:48:34,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:48:34,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585816439] [2024-11-09 04:48:34,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585816439] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:48:34,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461956743] [2024-11-09 04:48:34,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:48:34,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:48:34,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:48:34,818 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:48:34,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 04:48:35,763 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-09 04:48:35,763 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:48:35,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 04:48:35,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:48:42,782 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:48:42,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 227 treesize of output 651 [2024-11-09 04:48:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13206 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 12996 trivial. 0 not checked. [2024-11-09 04:48:45,004 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:49:12,770 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:49:12,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 1208 treesize of output 2032 [2024-11-09 04:50:17,495 INFO L134 CoverageAnalysis]: Checked inductivity of 13206 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 12996 trivial. 0 not checked. [2024-11-09 04:50:17,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461956743] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:50:17,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2113551608] [2024-11-09 04:50:17,497 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 04:50:17,497 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:50:17,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:50:17,498 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:50:17,498 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:50:17,761 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:50:19,092 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7550#(and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) ~N~0) (or (and (= |ULTIMATE.start_main_~j~0#1| (div ~N~0 2)) (or (< 0 (+ ~N~0 1)) (= (mod ~N~0 2) 0))) (< (div ~N~0 2) |ULTIMATE.start_main_~j~0#1|)))' at error location [2024-11-09 04:50:19,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:50:19,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:50:19,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 15, 15] total 144 [2024-11-09 04:50:19,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118630406] [2024-11-09 04:50:19,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:50:19,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2024-11-09 04:50:19,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:50:19,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2024-11-09 04:50:19,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7189, Invalid=15763, Unknown=0, NotChecked=0, Total=22952 [2024-11-09 04:50:19,100 INFO L87 Difference]: Start difference. First operand 276 states and 277 transitions. Second operand has 145 states, 145 states have (on average 2.296551724137931) internal successors, (333), 144 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:09,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:09,657 INFO L93 Difference]: Finished difference Result 932 states and 946 transitions. [2024-11-09 04:51:09,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2024-11-09 04:51:09,659 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.296551724137931) internal successors, (333), 144 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 275 [2024-11-09 04:51:09,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:09,662 INFO L225 Difference]: With dead ends: 932 [2024-11-09 04:51:09,663 INFO L226 Difference]: Without dead ends: 886 [2024-11-09 04:51:09,670 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1118 GetRequests, 786 SyntacticMatches, 3 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20869 ImplicationChecksByTransitivity, 66.4s TimeCoverageRelationStatistics Valid=33513, Invalid=75717, Unknown=0, NotChecked=0, Total=109230 [2024-11-09 04:51:09,670 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 2576 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 601 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2576 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 601 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:09,671 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2576 Valid, 318 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [601 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-09 04:51:09,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2024-11-09 04:51:09,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 326. [2024-11-09 04:51:09,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.0061538461538462) internal successors, (327), 325 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:09,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 327 transitions. [2024-11-09 04:51:09,735 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 327 transitions. Word has length 275 [2024-11-09 04:51:09,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:09,736 INFO L471 AbstractCegarLoop]: Abstraction has 326 states and 327 transitions. [2024-11-09 04:51:09,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 2.296551724137931) internal successors, (333), 144 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:09,736 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 327 transitions. [2024-11-09 04:51:09,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2024-11-09 04:51:09,741 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:09,742 INFO L215 NwaCegarLoop]: trace histogram [115, 115, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2024-11-09 04:51:09,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 04:51:09,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:51:09,943 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:51:09,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:09,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1871745051, now seen corresponding path program 9 times [2024-11-09 04:51:09,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:09,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146217510] [2024-11-09 04:51:09,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:09,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 14215 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2024-11-09 04:51:30,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:30,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146217510] [2024-11-09 04:51:30,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146217510] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:51:30,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850440289] [2024-11-09 04:51:30,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:51:30,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:51:30,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:51:30,516 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:51:30,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 04:51:31,171 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:51:31,172 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:51:31,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 1493 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-11-09 04:51:31,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:51:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 14215 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2024-11-09 04:51:39,707 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:52:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 14215 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2024-11-09 04:52:01,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850440289] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:52:01,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1694992324] [2024-11-09 04:52:01,553 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 04:52:01,553 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:52:01,554 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:52:01,554 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:52:01,554 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:52:01,793 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:52:02,778 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11849#(and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) ~N~0) (or (and (= |ULTIMATE.start_main_~j~0#1| (div ~N~0 2)) (or (< 0 (+ ~N~0 1)) (= (mod ~N~0 2) 0))) (< (div ~N~0 2) |ULTIMATE.start_main_~j~0#1|)))' at error location [2024-11-09 04:52:02,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:52:02,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:52:02,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117, 117] total 349 [2024-11-09 04:52:02,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104518180] [2024-11-09 04:52:02,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:52:02,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 350 states [2024-11-09 04:52:02,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:52:02,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 350 interpolants. [2024-11-09 04:52:02,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54542, Invalid=72550, Unknown=0, NotChecked=0, Total=127092 [2024-11-09 04:52:02,806 INFO L87 Difference]: Start difference. First operand 326 states and 327 transitions. Second operand has 350 states, 350 states have (on average 2.0085714285714285) internal successors, (703), 349 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:05,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:52:05,945 INFO L93 Difference]: Finished difference Result 654 states and 772 transitions. [2024-11-09 04:52:05,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2024-11-09 04:52:05,946 INFO L78 Accepts]: Start accepts. Automaton has has 350 states, 350 states have (on average 2.0085714285714285) internal successors, (703), 349 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 325 [2024-11-09 04:52:05,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:52:05,949 INFO L225 Difference]: With dead ends: 654 [2024-11-09 04:52:05,949 INFO L226 Difference]: Without dead ends: 560 [2024-11-09 04:52:05,957 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1090 GetRequests, 735 SyntacticMatches, 0 SemanticMatches, 355 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57528 ImplicationChecksByTransitivity, 37.4s TimeCoverageRelationStatistics Valid=54542, Invalid=72550, Unknown=0, NotChecked=0, Total=127092 [2024-11-09 04:52:05,958 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:52:05,958 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-09 04:52:05,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2024-11-09 04:52:06,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2024-11-09 04:52:06,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 559 states have (on average 1.003577817531306) internal successors, (561), 559 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 561 transitions. [2024-11-09 04:52:06,050 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 561 transitions. Word has length 325 [2024-11-09 04:52:06,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:52:06,051 INFO L471 AbstractCegarLoop]: Abstraction has 560 states and 561 transitions. [2024-11-09 04:52:06,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 350 states, 350 states have (on average 2.0085714285714285) internal successors, (703), 349 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:06,052 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 561 transitions. [2024-11-09 04:52:06,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2024-11-09 04:52:06,066 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:52:06,066 INFO L215 NwaCegarLoop]: trace histogram [232, 232, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2024-11-09 04:52:06,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 04:52:06,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 04:52:06,267 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:52:06,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:52:06,268 INFO L85 PathProgramCache]: Analyzing trace with hash -662149539, now seen corresponding path program 10 times [2024-11-09 04:52:06,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:52:06,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133979710] [2024-11-09 04:52:06,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:52:06,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:52:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:53:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 54814 backedges. 0 proven. 53824 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2024-11-09 04:53:28,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:53:28,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133979710] [2024-11-09 04:53:28,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133979710] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:53:28,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652956827] [2024-11-09 04:53:28,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:53:28,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:53:28,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:53:28,121 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:53:28,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 04:53:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:53:29,211 INFO L255 TraceCheckSpWp]: Trace formula consists of 2780 conjuncts, 235 conjuncts are in the unsatisfiable core [2024-11-09 04:53:29,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:53:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 54814 backedges. 0 proven. 53824 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2024-11-09 04:53:59,149 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:55:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 54814 backedges. 0 proven. 53824 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2024-11-09 04:55:20,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652956827] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:55:20,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1885383467] [2024-11-09 04:55:20,267 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 04:55:20,267 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:55:20,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:55:20,267 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:55:20,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:55:20,537 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:55:22,289 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17654#(and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) ~N~0) (or (and (= |ULTIMATE.start_main_~j~0#1| (div ~N~0 2)) (or (< 0 (+ ~N~0 1)) (= (mod ~N~0 2) 0))) (< (div ~N~0 2) |ULTIMATE.start_main_~j~0#1|)))' at error location [2024-11-09 04:55:22,290 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:55:22,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:55:22,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [234, 234, 234] total 700 [2024-11-09 04:55:22,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009382751] [2024-11-09 04:55:22,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:55:22,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 701 states [2024-11-09 04:55:22,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:55:22,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 701 interpolants. [2024-11-09 04:55:22,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218576, Invalid=281980, Unknown=0, NotChecked=0, Total=500556 [2024-11-09 04:55:22,349 INFO L87 Difference]: Start difference. First operand 560 states and 561 transitions. Second operand has 701 states, 701 states have (on average 2.0042796005706136) internal successors, (1405), 700 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:55:35,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:55:35,419 INFO L93 Difference]: Finished difference Result 1122 states and 1357 transitions. [2024-11-09 04:55:35,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 468 states. [2024-11-09 04:55:35,420 INFO L78 Accepts]: Start accepts. Automaton has has 701 states, 701 states have (on average 2.0042796005706136) internal successors, (1405), 700 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 559 [2024-11-09 04:55:35,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:55:35,425 INFO L225 Difference]: With dead ends: 1122 [2024-11-09 04:55:35,425 INFO L226 Difference]: Without dead ends: 1028 [2024-11-09 04:55:35,445 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1909 GetRequests, 1203 SyntacticMatches, 0 SemanticMatches, 706 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224604 ImplicationChecksByTransitivity, 138.1s TimeCoverageRelationStatistics Valid=218576, Invalid=281980, Unknown=0, NotChecked=0, Total=500556 [2024-11-09 04:55:35,446 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:55:35,446 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 27 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-09 04:55:35,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2024-11-09 04:55:35,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 1028. [2024-11-09 04:55:35,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 1.0019474196689386) internal successors, (1029), 1027 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:55:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1029 transitions. [2024-11-09 04:55:35,553 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1029 transitions. Word has length 559 [2024-11-09 04:55:35,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:55:35,554 INFO L471 AbstractCegarLoop]: Abstraction has 1028 states and 1029 transitions. [2024-11-09 04:55:35,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 701 states, 701 states have (on average 2.0042796005706136) internal successors, (1405), 700 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:55:35,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1029 transitions. [2024-11-09 04:55:35,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1028 [2024-11-09 04:55:35,566 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:55:35,567 INFO L215 NwaCegarLoop]: trace histogram [466, 466, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2024-11-09 04:55:35,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 04:55:35,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f23ef204-fdc5-458a-9cb5-1b88671e612b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 04:55:35,767 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:55:35,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:55:35,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1990773601, now seen corresponding path program 11 times [2024-11-09 04:55:35,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:55:35,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754148263] [2024-11-09 04:55:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:55:35,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:55:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat