./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.1.ufo.BOUNDED-10.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.1.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E --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 d6dd7af8c681da9a32811252853803422c95f4df19741eb4bc23f2d0511fe647 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:40:18,198 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:40:18,294 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:40:18,300 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:40:18,300 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:40:18,346 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:40:18,347 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:40:18,347 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:40:18,348 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:40:18,348 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:40:18,348 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:40:18,348 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:40:18,348 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:40:18,349 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:40:18,349 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:40:18,349 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:40:18,349 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:40:18,349 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:40:18,349 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:40:18,350 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:40:18,350 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:40:18,350 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:40:18,350 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:40:18,350 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:40:18,350 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:40:18,351 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:40:18,351 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:40:18,351 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:40:18,351 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:40:18,351 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:40:18,351 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:40:18,351 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:40:18,351 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:40:18,352 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:40:18,352 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:40:18,352 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:40:18,352 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:40:18,352 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:40:18,352 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:40:18,352 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:40:18,353 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:40:18,353 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:40:18,354 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:40:18,354 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:40:18,354 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:40:18,354 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:40:18,354 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:40:18,354 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E 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 -> d6dd7af8c681da9a32811252853803422c95f4df19741eb4bc23f2d0511fe647 [2024-11-14 04:40:18,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:40:18,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:40:18,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:40:18,691 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:40:18,691 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:40:18,694 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.1.ufo.BOUNDED-10.pals.c Unable to find full path for "g++" [2024-11-14 04:40:20,956 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:40:21,361 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:40:21,362 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.1.ufo.BOUNDED-10.pals.c [2024-11-14 04:40:21,381 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/data/d0ab371fa/9684778a9e314281889ab6907be40694/FLAG04115a587 [2024-11-14 04:40:21,565 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/data/d0ab371fa/9684778a9e314281889ab6907be40694 [2024-11-14 04:40:21,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:40:21,572 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:40:21,574 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:40:21,574 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:40:21,585 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:40:21,586 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:40:21" (1/1) ... [2024-11-14 04:40:21,590 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@590aafcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:21, skipping insertion in model container [2024-11-14 04:40:21,590 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:40:21" (1/1) ... [2024-11-14 04:40:21,633 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:40:21,936 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_cc53a2d8-0b98-434b-83af-487dbe7df90c/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.1.ufo.BOUNDED-10.pals.c[11956,11969] [2024-11-14 04:40:21,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:40:21,954 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:40:22,035 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_cc53a2d8-0b98-434b-83af-487dbe7df90c/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.1.ufo.BOUNDED-10.pals.c[11956,11969] [2024-11-14 04:40:22,036 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:40:22,066 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:40:22,070 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:22 WrapperNode [2024-11-14 04:40:22,070 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:40:22,072 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:40:22,072 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:40:22,072 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:40:22,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:22" (1/1) ... [2024-11-14 04:40:22,096 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:22" (1/1) ... [2024-11-14 04:40:22,139 INFO L138 Inliner]: procedures = 27, calls = 46, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 426 [2024-11-14 04:40:22,140 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:40:22,141 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:40:22,141 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:40:22,141 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:40:22,150 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:22" (1/1) ... [2024-11-14 04:40:22,151 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:22" (1/1) ... [2024-11-14 04:40:22,156 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:22" (1/1) ... [2024-11-14 04:40:22,156 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:22" (1/1) ... [2024-11-14 04:40:22,168 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:22" (1/1) ... [2024-11-14 04:40:22,176 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:22" (1/1) ... [2024-11-14 04:40:22,182 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:22" (1/1) ... [2024-11-14 04:40:22,185 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:22" (1/1) ... [2024-11-14 04:40:22,190 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:40:22,195 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:40:22,195 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:40:22,196 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:40:22,197 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:22" (1/1) ... [2024-11-14 04:40:22,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:40:22,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:40:22,249 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:40:22,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:40:22,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:40:22,278 INFO L130 BoogieDeclarations]: Found specification of procedure write_history_bool [2024-11-14 04:40:22,278 INFO L138 BoogieDeclarations]: Found implementation of procedure write_history_bool [2024-11-14 04:40:22,278 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2024-11-14 04:40:22,278 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2024-11-14 04:40:22,278 INFO L130 BoogieDeclarations]: Found specification of procedure read_history_int8 [2024-11-14 04:40:22,278 INFO L138 BoogieDeclarations]: Found implementation of procedure read_history_int8 [2024-11-14 04:40:22,278 INFO L130 BoogieDeclarations]: Found specification of procedure read_history_bool [2024-11-14 04:40:22,278 INFO L138 BoogieDeclarations]: Found implementation of procedure read_history_bool [2024-11-14 04:40:22,279 INFO L130 BoogieDeclarations]: Found specification of procedure add_history_type [2024-11-14 04:40:22,279 INFO L138 BoogieDeclarations]: Found implementation of procedure add_history_type [2024-11-14 04:40:22,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:40:22,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:40:22,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:40:22,426 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:40:22,428 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:40:23,395 INFO L? ?]: Removed 106 outVars from TransFormulas that were not future-live. [2024-11-14 04:40:23,396 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:40:23,749 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:40:23,749 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-14 04:40:23,750 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:40:23 BoogieIcfgContainer [2024-11-14 04:40:23,750 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:40:23,756 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:40:23,756 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:40:23,762 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:40:23,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:40:21" (1/3) ... [2024-11-14 04:40:23,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62fff2f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:40:23, skipping insertion in model container [2024-11-14 04:40:23,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:22" (2/3) ... [2024-11-14 04:40:23,766 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62fff2f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:40:23, skipping insertion in model container [2024-11-14 04:40:23,766 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:40:23" (3/3) ... [2024-11-14 04:40:23,768 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_Triplicated.1.ufo.BOUNDED-10.pals.c [2024-11-14 04:40:23,789 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:40:23,793 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG pals_STARTPALS_Triplicated.1.ufo.BOUNDED-10.pals.c that has 6 procedures, 131 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-14 04:40:23,859 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:40:23,874 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;@311ccf35, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:40:23,874 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:40:23,879 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 92 states have (on average 1.5) internal successors, (138), 96 states have internal predecessors, (138), 32 states have call successors, (32), 5 states have call predecessors, (32), 5 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-14 04:40:23,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 04:40:23,889 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:40:23,890 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:40:23,891 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:40:23,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:40:23,897 INFO L85 PathProgramCache]: Analyzing trace with hash 71175272, now seen corresponding path program 1 times [2024-11-14 04:40:23,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:40:23,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149527138] [2024-11-14 04:40:23,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:23,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:40:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:40:24,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:40:24,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149527138] [2024-11-14 04:40:24,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149527138] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:40:24,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:40:24,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:40:24,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290372325] [2024-11-14 04:40:24,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:40:24,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:40:24,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:40:24,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:40:24,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:40:24,404 INFO L87 Difference]: Start difference. First operand has 131 states, 92 states have (on average 1.5) internal successors, (138), 96 states have internal predecessors, (138), 32 states have call successors, (32), 5 states have call predecessors, (32), 5 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:40:24,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:40:24,677 INFO L93 Difference]: Finished difference Result 264 states and 437 transitions. [2024-11-14 04:40:24,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:40:24,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-14 04:40:24,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:40:24,690 INFO L225 Difference]: With dead ends: 264 [2024-11-14 04:40:24,691 INFO L226 Difference]: Without dead ends: 134 [2024-11-14 04:40:24,698 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:40:24,702 INFO L432 NwaCegarLoop]: 179 mSDtfsCounter, 3 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:40:24,703 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 525 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:40:24,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-14 04:40:24,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2024-11-14 04:40:24,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 95 states have (on average 1.4631578947368422) internal successors, (139), 98 states have internal predecessors, (139), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-14 04:40:24,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 203 transitions. [2024-11-14 04:40:24,791 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 203 transitions. Word has length 14 [2024-11-14 04:40:24,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:40:24,792 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 203 transitions. [2024-11-14 04:40:24,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:40:24,794 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 203 transitions. [2024-11-14 04:40:24,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 04:40:24,796 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:40:24,796 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:40:24,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:40:24,797 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:40:24,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:40:24,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1585489339, now seen corresponding path program 1 times [2024-11-14 04:40:24,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:40:24,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843869528] [2024-11-14 04:40:24,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:24,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:40:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:25,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:40:25,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:40:25,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843869528] [2024-11-14 04:40:25,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843869528] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:40:25,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:40:25,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:40:25,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883140231] [2024-11-14 04:40:25,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:40:25,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:40:25,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:40:25,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:40:25,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:40:25,050 INFO L87 Difference]: Start difference. First operand 134 states and 203 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:40:25,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:40:25,254 INFO L93 Difference]: Finished difference Result 280 states and 428 transitions. [2024-11-14 04:40:25,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:40:25,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-14 04:40:25,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:40:25,284 INFO L225 Difference]: With dead ends: 280 [2024-11-14 04:40:25,284 INFO L226 Difference]: Without dead ends: 148 [2024-11-14 04:40:25,285 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:40:25,286 INFO L432 NwaCegarLoop]: 182 mSDtfsCounter, 22 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:40:25,292 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 535 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:40:25,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-11-14 04:40:25,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2024-11-14 04:40:25,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 105 states have (on average 1.4476190476190476) internal successors, (152), 108 states have internal predecessors, (152), 33 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-14 04:40:25,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 218 transitions. [2024-11-14 04:40:25,328 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 218 transitions. Word has length 15 [2024-11-14 04:40:25,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:40:25,328 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 218 transitions. [2024-11-14 04:40:25,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:40:25,329 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 218 transitions. [2024-11-14 04:40:25,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 04:40:25,332 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:40:25,333 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:40:25,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:40:25,333 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:40:25,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:40:25,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1071998122, now seen corresponding path program 1 times [2024-11-14 04:40:25,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:40:25,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983491232] [2024-11-14 04:40:25,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:25,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:40:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:40:25,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:40:25,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983491232] [2024-11-14 04:40:25,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983491232] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:40:25,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:40:25,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:40:25,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050627938] [2024-11-14 04:40:25,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:40:25,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:40:25,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:40:25,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:40:25,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:40:25,513 INFO L87 Difference]: Start difference. First operand 146 states and 218 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 04:40:25,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:40:25,613 INFO L93 Difference]: Finished difference Result 312 states and 474 transitions. [2024-11-14 04:40:25,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:40:25,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-11-14 04:40:25,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:40:25,616 INFO L225 Difference]: With dead ends: 312 [2024-11-14 04:40:25,617 INFO L226 Difference]: Without dead ends: 175 [2024-11-14 04:40:25,618 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:40:25,619 INFO L432 NwaCegarLoop]: 182 mSDtfsCounter, 22 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:40:25,619 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 363 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:40:25,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-14 04:40:25,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 148. [2024-11-14 04:40:25,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 107 states have (on average 1.439252336448598) internal successors, (154), 110 states have internal predecessors, (154), 33 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-14 04:40:25,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 220 transitions. [2024-11-14 04:40:25,643 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 220 transitions. Word has length 19 [2024-11-14 04:40:25,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:40:25,644 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 220 transitions. [2024-11-14 04:40:25,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 04:40:25,644 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 220 transitions. [2024-11-14 04:40:25,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-14 04:40:25,650 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:40:25,650 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:40:25,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 04:40:25,650 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:40:25,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:40:25,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1341697871, now seen corresponding path program 1 times [2024-11-14 04:40:25,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:40:25,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431159544] [2024-11-14 04:40:25,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:25,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:40:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:40:25,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:40:25,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431159544] [2024-11-14 04:40:25,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431159544] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:40:25,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:40:25,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:40:25,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860166483] [2024-11-14 04:40:25,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:40:25,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:40:25,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:40:25,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:40:25,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:40:25,773 INFO L87 Difference]: Start difference. First operand 148 states and 220 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:40:25,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:40:25,867 INFO L93 Difference]: Finished difference Result 249 states and 371 transitions. [2024-11-14 04:40:25,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:40:25,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2024-11-14 04:40:25,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:40:25,869 INFO L225 Difference]: With dead ends: 249 [2024-11-14 04:40:25,869 INFO L226 Difference]: Without dead ends: 148 [2024-11-14 04:40:25,870 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:40:25,873 INFO L432 NwaCegarLoop]: 183 mSDtfsCounter, 0 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:40:25,873 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 363 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:40:25,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-11-14 04:40:25,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2024-11-14 04:40:25,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 107 states have (on average 1.411214953271028) internal successors, (151), 110 states have internal predecessors, (151), 33 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-14 04:40:25,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 217 transitions. [2024-11-14 04:40:25,905 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 217 transitions. Word has length 27 [2024-11-14 04:40:25,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:40:25,906 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 217 transitions. [2024-11-14 04:40:25,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:40:25,906 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 217 transitions. [2024-11-14 04:40:25,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-14 04:40:25,907 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:40:25,907 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:40:25,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 04:40:25,908 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:40:25,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:40:25,908 INFO L85 PathProgramCache]: Analyzing trace with hash 704020266, now seen corresponding path program 1 times [2024-11-14 04:40:25,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:40:25,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902279082] [2024-11-14 04:40:25,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:25,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:40:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:40:26,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:40:26,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902279082] [2024-11-14 04:40:26,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902279082] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:40:26,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:40:26,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:40:26,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102315819] [2024-11-14 04:40:26,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:40:26,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:40:26,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:40:26,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:40:26,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:40:26,122 INFO L87 Difference]: Start difference. First operand 148 states and 217 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:40:26,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:40:26,318 INFO L93 Difference]: Finished difference Result 288 states and 425 transitions. [2024-11-14 04:40:26,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:40:26,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2024-11-14 04:40:26,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:40:26,323 INFO L225 Difference]: With dead ends: 288 [2024-11-14 04:40:26,323 INFO L226 Difference]: Without dead ends: 150 [2024-11-14 04:40:26,324 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:40:26,325 INFO L432 NwaCegarLoop]: 180 mSDtfsCounter, 0 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:40:26,327 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 715 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:40:26,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-14 04:40:26,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2024-11-14 04:40:26,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 107 states have (on average 1.4018691588785046) internal successors, (150), 110 states have internal predecessors, (150), 33 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-14 04:40:26,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 216 transitions. [2024-11-14 04:40:26,354 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 216 transitions. Word has length 30 [2024-11-14 04:40:26,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:40:26,354 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 216 transitions. [2024-11-14 04:40:26,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:40:26,355 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 216 transitions. [2024-11-14 04:40:26,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 04:40:26,358 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:40:26,358 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:40:26,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 04:40:26,359 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:40:26,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:40:26,360 INFO L85 PathProgramCache]: Analyzing trace with hash 230074297, now seen corresponding path program 1 times [2024-11-14 04:40:26,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:40:26,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347637241] [2024-11-14 04:40:26,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:26,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:40:26,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:40:26,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:40:26,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347637241] [2024-11-14 04:40:26,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347637241] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:40:26,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292251098] [2024-11-14 04:40:26,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:26,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:40:26,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:40:26,538 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:40:26,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:40:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:26,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:40:26,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:40:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:40:26,786 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:40:26,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:40:26,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292251098] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:40:26,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1741571285] [2024-11-14 04:40:26,889 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-14 04:40:26,889 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:40:26,893 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:40:26,900 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:40:26,900 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:40:28,578 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 55 for LOIs [2024-11-14 04:40:30,814 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 04:40:30,881 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:40:34,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1741571285] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:40:34,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:40:34,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [4, 4, 4] total 22 [2024-11-14 04:40:34,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703591282] [2024-11-14 04:40:34,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:40:34,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 04:40:34,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:40:34,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 04:40:34,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-11-14 04:40:34,232 INFO L87 Difference]: Start difference. First operand 148 states and 216 transitions. Second operand has 18 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:40:37,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:40:37,082 INFO L93 Difference]: Finished difference Result 354 states and 518 transitions. [2024-11-14 04:40:37,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 04:40:37,083 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2024-11-14 04:40:37,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:40:37,087 INFO L225 Difference]: With dead ends: 354 [2024-11-14 04:40:37,090 INFO L226 Difference]: Without dead ends: 219 [2024-11-14 04:40:37,092 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2024-11-14 04:40:37,093 INFO L432 NwaCegarLoop]: 162 mSDtfsCounter, 158 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:40:37,093 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 1080 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 04:40:37,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-11-14 04:40:37,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 202. [2024-11-14 04:40:37,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 149 states have (on average 1.395973154362416) internal successors, (208), 152 states have internal predecessors, (208), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2024-11-14 04:40:37,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 286 transitions. [2024-11-14 04:40:37,143 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 286 transitions. Word has length 32 [2024-11-14 04:40:37,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:40:37,144 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 286 transitions. [2024-11-14 04:40:37,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:40:37,144 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 286 transitions. [2024-11-14 04:40:37,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 04:40:37,149 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:40:37,150 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:40:37,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:40:37,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:40:37,354 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:40:37,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:40:37,355 INFO L85 PathProgramCache]: Analyzing trace with hash 496347496, now seen corresponding path program 1 times [2024-11-14 04:40:37,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:40:37,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075519547] [2024-11-14 04:40:37,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:37,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:40:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 04:40:37,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:40:37,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075519547] [2024-11-14 04:40:37,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075519547] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:40:37,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802227249] [2024-11-14 04:40:37,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:37,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:40:37,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:40:37,525 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:40:37,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:40:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:37,656 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:40:37,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:40:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 04:40:37,690 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:40:37,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802227249] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:40:37,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:40:37,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-14 04:40:37,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797191910] [2024-11-14 04:40:37,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:40:37,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:40:37,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:40:37,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:40:37,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:40:37,692 INFO L87 Difference]: Start difference. First operand 202 states and 286 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:40:37,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:40:37,836 INFO L93 Difference]: Finished difference Result 388 states and 557 transitions. [2024-11-14 04:40:37,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:40:37,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-11-14 04:40:37,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:40:37,839 INFO L225 Difference]: With dead ends: 388 [2024-11-14 04:40:37,840 INFO L226 Difference]: Without dead ends: 205 [2024-11-14 04:40:37,844 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:40:37,845 INFO L432 NwaCegarLoop]: 179 mSDtfsCounter, 7 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:40:37,846 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 343 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:40:37,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-14 04:40:37,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2024-11-14 04:40:37,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 151 states have (on average 1.3841059602649006) internal successors, (209), 154 states have internal predecessors, (209), 37 states have call successors, (37), 13 states have call predecessors, (37), 13 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-14 04:40:37,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 283 transitions. [2024-11-14 04:40:37,894 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 283 transitions. Word has length 44 [2024-11-14 04:40:37,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:40:37,896 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 283 transitions. [2024-11-14 04:40:37,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:40:37,896 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 283 transitions. [2024-11-14 04:40:37,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 04:40:37,897 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:40:37,897 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:40:37,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 04:40:38,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 04:40:38,098 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:40:38,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:40:38,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1955742821, now seen corresponding path program 1 times [2024-11-14 04:40:38,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:40:38,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678614812] [2024-11-14 04:40:38,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:38,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:40:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:40:38,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:40:38,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678614812] [2024-11-14 04:40:38,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678614812] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:40:38,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245286357] [2024-11-14 04:40:38,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:38,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:40:38,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:40:38,233 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:40:38,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:40:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:38,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:40:38,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:40:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:40:38,402 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:40:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:40:38,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245286357] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:40:38,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2018762218] [2024-11-14 04:40:38,468 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2024-11-14 04:40:38,468 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:40:38,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:40:38,469 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:40:38,469 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:40:39,624 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 56 for LOIs [2024-11-14 04:40:41,385 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 56 for LOIs [2024-11-14 04:40:41,414 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:40:44,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2018762218] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:40:44,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:40:44,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [4, 4, 4] total 23 [2024-11-14 04:40:44,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479391193] [2024-11-14 04:40:44,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:40:44,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 04:40:44,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:40:44,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 04:40:44,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2024-11-14 04:40:44,650 INFO L87 Difference]: Start difference. First operand 202 states and 283 transitions. Second operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:40:46,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:40:46,687 INFO L93 Difference]: Finished difference Result 425 states and 600 transitions. [2024-11-14 04:40:46,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 04:40:46,688 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2024-11-14 04:40:46,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:40:46,690 INFO L225 Difference]: With dead ends: 425 [2024-11-14 04:40:46,690 INFO L226 Difference]: Without dead ends: 240 [2024-11-14 04:40:46,691 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2024-11-14 04:40:46,692 INFO L432 NwaCegarLoop]: 158 mSDtfsCounter, 78 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:40:46,692 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 999 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-14 04:40:46,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-11-14 04:40:46,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 223. [2024-11-14 04:40:46,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 168 states have (on average 1.3869047619047619) internal successors, (233), 171 states have internal predecessors, (233), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-14 04:40:46,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 313 transitions. [2024-11-14 04:40:46,738 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 313 transitions. Word has length 47 [2024-11-14 04:40:46,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:40:46,738 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 313 transitions. [2024-11-14 04:40:46,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:40:46,738 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 313 transitions. [2024-11-14 04:40:46,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-14 04:40:46,739 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:40:46,739 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:40:46,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 04:40:46,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 04:40:46,940 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:40:46,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:40:46,941 INFO L85 PathProgramCache]: Analyzing trace with hash -2129697488, now seen corresponding path program 1 times [2024-11-14 04:40:46,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:40:46,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124264224] [2024-11-14 04:40:46,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:46,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:40:46,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:40:47,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:40:47,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124264224] [2024-11-14 04:40:47,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124264224] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:40:47,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87562152] [2024-11-14 04:40:47,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:47,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:40:47,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:40:47,124 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:40:47,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:40:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:47,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:40:47,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:40:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 04:40:47,301 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:40:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:40:47,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87562152] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:40:47,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [268699358] [2024-11-14 04:40:47,366 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2024-11-14 04:40:47,366 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:40:47,366 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:40:47,367 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:40:47,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:40:48,257 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 56 for LOIs [2024-11-14 04:40:49,657 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 60 for LOIs [2024-11-14 04:40:49,738 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:40:53,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [268699358] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:40:53,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:40:53,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [4, 4, 4] total 24 [2024-11-14 04:40:53,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101039176] [2024-11-14 04:40:53,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:40:53,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 04:40:53,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:40:53,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 04:40:53,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2024-11-14 04:40:53,739 INFO L87 Difference]: Start difference. First operand 223 states and 313 transitions. Second operand has 20 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 14 states have internal predecessors, (26), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:40:55,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:40:55,830 INFO L93 Difference]: Finished difference Result 424 states and 600 transitions. [2024-11-14 04:40:55,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-14 04:40:55,831 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 14 states have internal predecessors, (26), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2024-11-14 04:40:55,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:40:55,833 INFO L225 Difference]: With dead ends: 424 [2024-11-14 04:40:55,833 INFO L226 Difference]: Without dead ends: 236 [2024-11-14 04:40:55,834 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 120 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2024-11-14 04:40:55,838 INFO L432 NwaCegarLoop]: 157 mSDtfsCounter, 75 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:40:55,838 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 888 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-14 04:40:55,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-11-14 04:40:55,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 221. [2024-11-14 04:40:55,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 167 states have (on average 1.3712574850299402) internal successors, (229), 170 states have internal predecessors, (229), 39 states have call successors, (39), 14 states have call predecessors, (39), 14 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2024-11-14 04:40:55,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 307 transitions. [2024-11-14 04:40:55,888 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 307 transitions. Word has length 48 [2024-11-14 04:40:55,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:40:55,888 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 307 transitions. [2024-11-14 04:40:55,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 14 states have internal predecessors, (26), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:40:55,889 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 307 transitions. [2024-11-14 04:40:55,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-14 04:40:55,890 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:40:55,890 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:40:55,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:40:56,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-14 04:40:56,094 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:40:56,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:40:56,095 INFO L85 PathProgramCache]: Analyzing trace with hash -274751096, now seen corresponding path program 1 times [2024-11-14 04:40:56,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:40:56,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85663738] [2024-11-14 04:40:56,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:56,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:40:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-14 04:40:56,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:40:56,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85663738] [2024-11-14 04:40:56,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85663738] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:40:56,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194208348] [2024-11-14 04:40:56,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:56,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:40:56,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:40:56,241 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:40:56,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:40:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:56,382 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:40:56,390 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:40:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-14 04:40:56,418 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:40:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-14 04:40:56,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194208348] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:40:56,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [774553495] [2024-11-14 04:40:56,503 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2024-11-14 04:40:56,505 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:40:56,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:40:56,505 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:40:56,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:40:57,512 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:40:58,838 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 69 for LOIs [2024-11-14 04:40:58,894 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 57 for LOIs [2024-11-14 04:40:58,906 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:41:02,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [774553495] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:41:02,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:41:02,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [4, 4, 4] total 28 [2024-11-14 04:41:02,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937019189] [2024-11-14 04:41:02,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:41:02,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 04:41:02,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:41:02,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 04:41:02,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2024-11-14 04:41:02,826 INFO L87 Difference]: Start difference. First operand 221 states and 307 transitions. Second operand has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 16 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 04:41:04,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:41:04,803 INFO L93 Difference]: Finished difference Result 383 states and 538 transitions. [2024-11-14 04:41:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 04:41:04,803 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 16 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2024-11-14 04:41:04,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:41:04,806 INFO L225 Difference]: With dead ends: 383 [2024-11-14 04:41:04,806 INFO L226 Difference]: Without dead ends: 225 [2024-11-14 04:41:04,807 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 159 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2024-11-14 04:41:04,808 INFO L432 NwaCegarLoop]: 145 mSDtfsCounter, 38 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:41:04,808 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 932 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-14 04:41:04,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-11-14 04:41:04,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 213. [2024-11-14 04:41:04,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 161 states have (on average 1.360248447204969) internal successors, (219), 164 states have internal predecessors, (219), 38 states have call successors, (38), 13 states have call predecessors, (38), 13 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2024-11-14 04:41:04,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 295 transitions. [2024-11-14 04:41:04,860 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 295 transitions. Word has length 62 [2024-11-14 04:41:04,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:41:04,861 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 295 transitions. [2024-11-14 04:41:04,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 16 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 04:41:04,861 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 295 transitions. [2024-11-14 04:41:04,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-14 04:41:04,863 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:41:04,863 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:41:04,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 04:41:05,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 04:41:05,064 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:41:05,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:41:05,064 INFO L85 PathProgramCache]: Analyzing trace with hash -766143211, now seen corresponding path program 1 times [2024-11-14 04:41:05,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:41:05,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888163827] [2024-11-14 04:41:05,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:41:05,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:41:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:41:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-14 04:41:05,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:41:05,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888163827] [2024-11-14 04:41:05,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888163827] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:41:05,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812494184] [2024-11-14 04:41:05,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:41:05,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:41:05,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:41:05,237 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:41:05,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:41:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:41:05,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:41:05,404 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:41:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-14 04:41:05,440 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:41:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-14 04:41:05,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812494184] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:41:05,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1798905493] [2024-11-14 04:41:05,525 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-14 04:41:05,527 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:41:05,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:41:05,527 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:41:05,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:41:07,806 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 122 for LOIs [2024-11-14 04:41:07,838 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 56 for LOIs [2024-11-14 04:41:08,634 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 6 for LOIs [2024-11-14 04:41:08,639 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:41:14,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1798905493] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:41:14,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:41:14,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [4, 4, 4] total 29 [2024-11-14 04:41:14,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024300313] [2024-11-14 04:41:14,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:41:14,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 04:41:14,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:41:14,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 04:41:14,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2024-11-14 04:41:14,950 INFO L87 Difference]: Start difference. First operand 213 states and 295 transitions. Second operand has 25 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 04:41:20,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:41:20,872 INFO L93 Difference]: Finished difference Result 385 states and 547 transitions. [2024-11-14 04:41:20,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-14 04:41:20,873 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2024-11-14 04:41:20,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:41:20,876 INFO L225 Difference]: With dead ends: 385 [2024-11-14 04:41:20,876 INFO L226 Difference]: Without dead ends: 285 [2024-11-14 04:41:20,877 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 190 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 04:41:20,878 INFO L432 NwaCegarLoop]: 149 mSDtfsCounter, 158 mSDsluCounter, 1971 mSDsCounter, 0 mSdLazyCounter, 1712 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 2120 SdHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:41:20,878 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 2120 Invalid, 1740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1712 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-11-14 04:41:20,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2024-11-14 04:41:20,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 217. [2024-11-14 04:41:20,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 164 states have (on average 1.353658536585366) internal successors, (222), 167 states have internal predecessors, (222), 39 states have call successors, (39), 14 states have call predecessors, (39), 13 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2024-11-14 04:41:20,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 300 transitions. [2024-11-14 04:41:20,929 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 300 transitions. Word has length 73 [2024-11-14 04:41:20,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:41:20,930 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 300 transitions. [2024-11-14 04:41:20,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 04:41:20,930 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 300 transitions. [2024-11-14 04:41:20,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-14 04:41:20,931 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:41:20,932 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:41:20,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-14 04:41:21,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 04:41:21,133 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:41:21,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:41:21,133 INFO L85 PathProgramCache]: Analyzing trace with hash 623253388, now seen corresponding path program 1 times [2024-11-14 04:41:21,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:41:21,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667072562] [2024-11-14 04:41:21,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:41:21,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:41:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:41:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-14 04:41:21,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:41:21,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667072562] [2024-11-14 04:41:21,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667072562] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:41:21,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209594254] [2024-11-14 04:41:21,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:41:21,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:41:21,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:41:21,332 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:41:21,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:41:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:41:21,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:41:21,513 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:41:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-14 04:41:21,545 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:41:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-14 04:41:21,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209594254] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:41:21,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1095484452] [2024-11-14 04:41:21,640 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2024-11-14 04:41:21,643 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:41:21,644 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:41:21,644 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:41:21,644 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:41:26,419 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 61 for LOIs [2024-11-14 04:41:26,466 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:41:27,116 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 6 for LOIs [2024-11-14 04:41:27,122 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:41:38,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1095484452] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:41:38,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:41:38,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [4, 4, 4] total 34 [2024-11-14 04:41:38,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547931249] [2024-11-14 04:41:38,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:41:38,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-14 04:41:38,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:41:38,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-14 04:41:38,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 04:41:38,337 INFO L87 Difference]: Start difference. First operand 217 states and 300 transitions. Second operand has 30 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 20 states have internal predecessors, (32), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-14 04:41:44,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:41:52,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:41:55,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:41:59,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:42:04,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:42:04,777 INFO L93 Difference]: Finished difference Result 351 states and 487 transitions. [2024-11-14 04:42:04,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-14 04:42:04,778 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 20 states have internal predecessors, (32), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 79 [2024-11-14 04:42:04,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:42:04,780 INFO L225 Difference]: With dead ends: 351 [2024-11-14 04:42:04,780 INFO L226 Difference]: Without dead ends: 251 [2024-11-14 04:42:04,781 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 203 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=214, Invalid=1945, Unknown=3, NotChecked=0, Total=2162 [2024-11-14 04:42:04,784 INFO L432 NwaCegarLoop]: 151 mSDtfsCounter, 93 mSDsluCounter, 2229 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 21 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 2380 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:42:04,784 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 2380 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1684 Invalid, 4 Unknown, 0 Unchecked, 15.0s Time] [2024-11-14 04:42:04,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-11-14 04:42:04,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 226. [2024-11-14 04:42:04,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 170 states have (on average 1.3470588235294119) internal successors, (229), 174 states have internal predecessors, (229), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-14 04:42:04,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 309 transitions. [2024-11-14 04:42:04,845 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 309 transitions. Word has length 79 [2024-11-14 04:42:04,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:42:04,845 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 309 transitions. [2024-11-14 04:42:04,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 20 states have internal predecessors, (32), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-14 04:42:04,845 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 309 transitions. [2024-11-14 04:42:04,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-14 04:42:04,847 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:04,847 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:42:04,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 04:42:05,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 04:42:05,048 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:42:05,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:05,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1161884359, now seen corresponding path program 1 times [2024-11-14 04:42:05,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:05,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553506828] [2024-11-14 04:42:05,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:05,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:05,188 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-14 04:42:05,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:42:05,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553506828] [2024-11-14 04:42:05,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553506828] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:42:05,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551377378] [2024-11-14 04:42:05,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:05,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:05,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:42:05,192 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:42:05,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:42:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:05,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:42:05,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:42:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-14 04:42:05,388 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:42:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-14 04:42:05,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551377378] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:42:05,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1876160900] [2024-11-14 04:42:05,470 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2024-11-14 04:42:05,470 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:42:05,471 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:42:05,471 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:42:05,471 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:42:10,084 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-14 04:42:10,178 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:42:11,002 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 6 for LOIs [2024-11-14 04:42:11,008 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:42:24,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1876160900] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:42:24,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:42:24,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [4, 4, 4] total 36 [2024-11-14 04:42:24,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151504896] [2024-11-14 04:42:24,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:42:24,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-14 04:42:24,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:42:24,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-14 04:42:24,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1150, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 04:42:24,838 INFO L87 Difference]: Start difference. First operand 226 states and 309 transitions. Second operand has 32 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 22 states have internal predecessors, (34), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 04:42:37,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:42:40,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:42:46,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:42:46,777 INFO L93 Difference]: Finished difference Result 402 states and 563 transitions. [2024-11-14 04:42:46,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-14 04:42:46,778 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 22 states have internal predecessors, (34), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 86 [2024-11-14 04:42:46,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:42:46,781 INFO L225 Difference]: With dead ends: 402 [2024-11-14 04:42:46,781 INFO L226 Difference]: Without dead ends: 300 [2024-11-14 04:42:46,783 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 222 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=228, Invalid=2221, Unknown=1, NotChecked=0, Total=2450 [2024-11-14 04:42:46,784 INFO L432 NwaCegarLoop]: 144 mSDtfsCounter, 93 mSDsluCounter, 2362 mSDsCounter, 0 mSdLazyCounter, 2148 mSolverCounterSat, 29 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 2506 SdHoareTripleChecker+Invalid, 2179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2148 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:42:46,784 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 2506 Invalid, 2179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2148 Invalid, 2 Unknown, 0 Unchecked, 13.2s Time] [2024-11-14 04:42:46,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2024-11-14 04:42:46,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 234. [2024-11-14 04:42:46,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 176 states have (on average 1.3352272727272727) internal successors, (235), 180 states have internal predecessors, (235), 41 states have call successors, (41), 16 states have call predecessors, (41), 16 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2024-11-14 04:42:46,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 317 transitions. [2024-11-14 04:42:46,835 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 317 transitions. Word has length 86 [2024-11-14 04:42:46,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:42:46,835 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 317 transitions. [2024-11-14 04:42:46,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 22 states have internal predecessors, (34), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 04:42:46,836 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 317 transitions. [2024-11-14 04:42:46,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-14 04:42:46,837 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:46,837 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:42:46,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 04:42:47,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:47,038 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:42:47,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:47,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1973907073, now seen corresponding path program 1 times [2024-11-14 04:42:47,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:47,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881951946] [2024-11-14 04:42:47,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:47,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:47,208 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-14 04:42:47,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:42:47,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881951946] [2024-11-14 04:42:47,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881951946] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:42:47,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656744506] [2024-11-14 04:42:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:47,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:47,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:42:47,211 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:42:47,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:42:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:47,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:42:47,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:42:47,463 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-14 04:42:47,464 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:42:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-14 04:42:47,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656744506] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:42:47,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1896146577] [2024-11-14 04:42:47,570 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2024-11-14 04:42:47,571 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:42:47,572 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:42:47,573 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:42:47,573 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:42:51,197 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-14 04:42:51,291 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:42:51,934 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 6 for LOIs [2024-11-14 04:42:51,940 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:43:01,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1896146577] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:43:01,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:43:01,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [4, 4, 4] total 37 [2024-11-14 04:43:01,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504308958] [2024-11-14 04:43:01,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:43:01,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-14 04:43:01,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:43:01,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-14 04:43:01,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 04:43:01,819 INFO L87 Difference]: Start difference. First operand 234 states and 317 transitions. Second operand has 33 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 24 states have internal predecessors, (38), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-14 04:43:13,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:43:18,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:43:18,191 INFO L93 Difference]: Finished difference Result 401 states and 560 transitions. [2024-11-14 04:43:18,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-14 04:43:18,191 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 24 states have internal predecessors, (38), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 92 [2024-11-14 04:43:18,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:43:18,193 INFO L225 Difference]: With dead ends: 401 [2024-11-14 04:43:18,194 INFO L226 Difference]: Without dead ends: 301 [2024-11-14 04:43:18,195 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 239 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=221, Invalid=2130, Unknown=1, NotChecked=0, Total=2352 [2024-11-14 04:43:18,196 INFO L432 NwaCegarLoop]: 140 mSDtfsCounter, 153 mSDsluCounter, 1729 mSDsCounter, 0 mSdLazyCounter, 1711 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 1869 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1711 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:43:18,196 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 1869 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1711 Invalid, 1 Unknown, 0 Unchecked, 7.8s Time] [2024-11-14 04:43:18,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2024-11-14 04:43:18,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 238. [2024-11-14 04:43:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 180 states have (on average 1.3277777777777777) internal successors, (239), 183 states have internal predecessors, (239), 41 states have call successors, (41), 16 states have call predecessors, (41), 16 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2024-11-14 04:43:18,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 321 transitions. [2024-11-14 04:43:18,262 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 321 transitions. Word has length 92 [2024-11-14 04:43:18,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:43:18,262 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 321 transitions. [2024-11-14 04:43:18,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 24 states have internal predecessors, (38), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-14 04:43:18,262 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 321 transitions. [2024-11-14 04:43:18,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-14 04:43:18,264 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:43:18,264 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:43:18,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 04:43:18,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:18,464 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:43:18,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:43:18,465 INFO L85 PathProgramCache]: Analyzing trace with hash 458564815, now seen corresponding path program 1 times [2024-11-14 04:43:18,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:43:18,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126704982] [2024-11-14 04:43:18,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:43:18,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:43:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:43:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-14 04:43:18,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:43:18,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126704982] [2024-11-14 04:43:18,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126704982] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:43:18,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355213550] [2024-11-14 04:43:18,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:43:18,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:18,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:43:18,644 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:43:18,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:43:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:43:18,876 INFO L255 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:43:18,880 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:43:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-14 04:43:18,904 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:43:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-14 04:43:19,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355213550] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:43:19,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [276935648] [2024-11-14 04:43:19,015 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-14 04:43:19,019 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:43:19,020 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:43:19,020 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:43:19,020 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:43:24,907 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-14 04:43:25,016 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:43:25,708 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 8 for LOIs [2024-11-14 04:43:25,732 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 68 for LOIs [2024-11-14 04:43:25,745 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:43:39,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [276935648] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:43:39,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:43:39,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [4, 4, 4] total 45 [2024-11-14 04:43:39,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913075764] [2024-11-14 04:43:39,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:43:39,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-14 04:43:39,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:43:39,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-14 04:43:39,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1845, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 04:43:39,996 INFO L87 Difference]: Start difference. First operand 238 states and 321 transitions. Second operand has 41 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 29 states have internal predecessors, (43), 8 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-14 04:43:56,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:44:05,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:44:05,258 INFO L93 Difference]: Finished difference Result 416 states and 580 transitions. [2024-11-14 04:44:05,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-14 04:44:05,259 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 29 states have internal predecessors, (43), 8 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 103 [2024-11-14 04:44:05,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:44:05,261 INFO L225 Difference]: With dead ends: 416 [2024-11-14 04:44:05,261 INFO L226 Difference]: Without dead ends: 316 [2024-11-14 04:44:05,265 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 264 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=253, Invalid=3166, Unknown=3, NotChecked=0, Total=3422 [2024-11-14 04:44:05,266 INFO L432 NwaCegarLoop]: 128 mSDtfsCounter, 133 mSDsluCounter, 2170 mSDsCounter, 0 mSdLazyCounter, 3508 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 2298 SdHoareTripleChecker+Invalid, 3532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3508 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:44:05,266 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 2298 Invalid, 3532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3508 Invalid, 1 Unknown, 0 Unchecked, 12.6s Time] [2024-11-14 04:44:05,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-11-14 04:44:05,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 261. [2024-11-14 04:44:05,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 195 states have (on average 1.323076923076923) internal successors, (258), 199 states have internal predecessors, (258), 48 states have call successors, (48), 17 states have call predecessors, (48), 17 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-14 04:44:05,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 354 transitions. [2024-11-14 04:44:05,342 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 354 transitions. Word has length 103 [2024-11-14 04:44:05,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:44:05,343 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 354 transitions. [2024-11-14 04:44:05,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 29 states have internal predecessors, (43), 8 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-14 04:44:05,343 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 354 transitions. [2024-11-14 04:44:05,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-14 04:44:05,344 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:44:05,345 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:44:05,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 04:44:05,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:44:05,545 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:44:05,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:44:05,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1564652362, now seen corresponding path program 1 times [2024-11-14 04:44:05,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:44:05,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358080772] [2024-11-14 04:44:05,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:44:05,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:44:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:44:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-14 04:44:05,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:44:05,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358080772] [2024-11-14 04:44:05,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358080772] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:44:05,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046755010] [2024-11-14 04:44:05,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:44:05,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:44:05,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:44:05,712 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:44:05,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:44:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:44:05,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:44:05,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:44:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-14 04:44:05,972 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:44:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-14 04:44:06,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046755010] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:44:06,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1558779708] [2024-11-14 04:44:06,074 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-14 04:44:06,074 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:44:06,074 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:44:06,075 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:44:06,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:44:09,957 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-14 04:44:10,052 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 56 for LOIs [2024-11-14 04:44:10,647 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 54 for LOIs [2024-11-14 04:44:10,695 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:44:28,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1558779708] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:44:28,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:44:28,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [4, 4, 4] total 42 [2024-11-14 04:44:28,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469957100] [2024-11-14 04:44:28,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:44:28,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-14 04:44:28,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:44:28,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-14 04:44:28,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1597, Unknown=1, NotChecked=0, Total=1722 [2024-11-14 04:44:28,953 INFO L87 Difference]: Start difference. First operand 261 states and 354 transitions. Second operand has 38 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 29 states have internal predecessors, (44), 8 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-14 04:44:33,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:44:36,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:44:47,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:44:54,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:44:57,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:45:05,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:45:05,300 INFO L93 Difference]: Finished difference Result 481 states and 676 transitions. [2024-11-14 04:45:05,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-14 04:45:05,301 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 29 states have internal predecessors, (44), 8 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 105 [2024-11-14 04:45:05,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:45:05,304 INFO L225 Difference]: With dead ends: 481 [2024-11-14 04:45:05,304 INFO L226 Difference]: Without dead ends: 361 [2024-11-14 04:45:05,305 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 272 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 35.4s TimeCoverageRelationStatistics Valid=237, Invalid=2839, Unknown=4, NotChecked=0, Total=3080 [2024-11-14 04:45:05,306 INFO L432 NwaCegarLoop]: 118 mSDtfsCounter, 135 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 3519 mSolverCounterSat, 29 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 3553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3519 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:45:05,306 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 1699 Invalid, 3553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 3519 Invalid, 5 Unknown, 0 Unchecked, 19.0s Time] [2024-11-14 04:45:05,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2024-11-14 04:45:05,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 279. [2024-11-14 04:45:05,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 208 states have (on average 1.3173076923076923) internal successors, (274), 212 states have internal predecessors, (274), 51 states have call successors, (51), 19 states have call predecessors, (51), 19 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2024-11-14 04:45:05,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 376 transitions. [2024-11-14 04:45:05,399 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 376 transitions. Word has length 105 [2024-11-14 04:45:05,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:45:05,399 INFO L471 AbstractCegarLoop]: Abstraction has 279 states and 376 transitions. [2024-11-14 04:45:05,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 29 states have internal predecessors, (44), 8 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-14 04:45:05,400 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 376 transitions. [2024-11-14 04:45:05,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-14 04:45:05,407 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:45:05,408 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:45:05,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 04:45:05,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:45:05,608 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:45:05,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:45:05,609 INFO L85 PathProgramCache]: Analyzing trace with hash 91035143, now seen corresponding path program 1 times [2024-11-14 04:45:05,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:45:05,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445976856] [2024-11-14 04:45:05,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:45:05,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:45:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:45:05,768 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-14 04:45:05,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:45:05,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445976856] [2024-11-14 04:45:05,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445976856] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:45:05,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209297292] [2024-11-14 04:45:05,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:45:05,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:45:05,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:45:05,772 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:45:05,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:45:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:45:06,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:45:06,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:45:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-14 04:45:06,055 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:45:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-14 04:45:06,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209297292] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:45:06,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1567937954] [2024-11-14 04:45:06,167 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2024-11-14 04:45:06,168 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:45:06,169 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:45:06,169 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:45:06,169 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:45:12,578 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-14 04:45:12,681 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:45:13,429 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 8 for LOIs [2024-11-14 04:45:13,447 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 78 for LOIs [2024-11-14 04:45:13,616 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:45:33,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1567937954] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:45:33,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:45:33,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [4, 4, 4] total 49 [2024-11-14 04:45:33,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200385028] [2024-11-14 04:45:33,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:45:33,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-14 04:45:33,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:45:33,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-14 04:45:33,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2204, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 04:45:33,150 INFO L87 Difference]: Start difference. First operand 279 states and 376 transitions. Second operand has 45 states, 38 states have (on average 1.236842105263158) internal successors, (47), 32 states have internal predecessors, (47), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-14 04:45:44,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:45:47,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:45:59,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:45:59,277 INFO L93 Difference]: Finished difference Result 485 states and 681 transitions. [2024-11-14 04:45:59,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-14 04:45:59,277 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 38 states have (on average 1.236842105263158) internal successors, (47), 32 states have internal predecessors, (47), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 110 [2024-11-14 04:45:59,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:45:59,280 INFO L225 Difference]: With dead ends: 485 [2024-11-14 04:45:59,281 INFO L226 Difference]: Without dead ends: 385 [2024-11-14 04:45:59,283 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 281 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=279, Invalid=4010, Unknown=1, NotChecked=0, Total=4290 [2024-11-14 04:45:59,284 INFO L432 NwaCegarLoop]: 117 mSDtfsCounter, 267 mSDsluCounter, 1741 mSDsCounter, 0 mSdLazyCounter, 3467 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 3529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 3467 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:45:59,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 1858 Invalid, 3529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 3467 Invalid, 1 Unknown, 0 Unchecked, 15.6s Time] [2024-11-14 04:45:59,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-11-14 04:45:59,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 293. [2024-11-14 04:45:59,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 217 states have (on average 1.3179723502304148) internal successors, (286), 222 states have internal predecessors, (286), 55 states have call successors, (55), 20 states have call predecessors, (55), 20 states have return successors, (55), 53 states have call predecessors, (55), 55 states have call successors, (55) [2024-11-14 04:45:59,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 396 transitions. [2024-11-14 04:45:59,379 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 396 transitions. Word has length 110 [2024-11-14 04:45:59,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:45:59,380 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 396 transitions. [2024-11-14 04:45:59,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 38 states have (on average 1.236842105263158) internal successors, (47), 32 states have internal predecessors, (47), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-14 04:45:59,380 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 396 transitions. [2024-11-14 04:45:59,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-14 04:45:59,383 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:45:59,383 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:45:59,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 04:45:59,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 04:45:59,590 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:45:59,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:45:59,590 INFO L85 PathProgramCache]: Analyzing trace with hash -97225920, now seen corresponding path program 1 times [2024-11-14 04:45:59,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:45:59,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309931434] [2024-11-14 04:45:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:45:59,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:45:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:45:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-14 04:45:59,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:45:59,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309931434] [2024-11-14 04:45:59,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309931434] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:45:59,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708503382] [2024-11-14 04:45:59,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:45:59,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:45:59,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:45:59,757 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:45:59,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 04:46:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:00,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:46:00,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:46:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-14 04:46:00,034 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:46:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-14 04:46:00,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708503382] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:46:00,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [839888193] [2024-11-14 04:46:00,150 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2024-11-14 04:46:00,150 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:46:00,150 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:46:00,151 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:46:00,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:46:06,485 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-14 04:46:06,590 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:46:07,284 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 8 for LOIs [2024-11-14 04:46:07,302 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 77 for LOIs [2024-11-14 04:46:07,466 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:46:27,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [839888193] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:46:27,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:46:27,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [4, 4, 4] total 49 [2024-11-14 04:46:27,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420511607] [2024-11-14 04:46:27,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:46:27,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-14 04:46:27,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:46:27,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-14 04:46:27,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2204, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 04:46:27,013 INFO L87 Difference]: Start difference. First operand 293 states and 396 transitions. Second operand has 45 states, 38 states have (on average 1.236842105263158) internal successors, (47), 32 states have internal predecessors, (47), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-14 04:46:39,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:46:49,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:46:49,996 INFO L93 Difference]: Finished difference Result 504 states and 702 transitions. [2024-11-14 04:46:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-14 04:46:49,997 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 38 states have (on average 1.236842105263158) internal successors, (47), 32 states have internal predecessors, (47), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 110 [2024-11-14 04:46:49,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:46:50,000 INFO L225 Difference]: With dead ends: 504 [2024-11-14 04:46:50,000 INFO L226 Difference]: Without dead ends: 389 [2024-11-14 04:46:50,002 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 281 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=279, Invalid=4011, Unknown=0, NotChecked=0, Total=4290 [2024-11-14 04:46:50,003 INFO L432 NwaCegarLoop]: 132 mSDtfsCounter, 253 mSDsluCounter, 2001 mSDsCounter, 0 mSdLazyCounter, 4038 mSolverCounterSat, 63 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 2133 SdHoareTripleChecker+Invalid, 4102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 4038 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:46:50,003 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 2133 Invalid, 4102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 4038 Invalid, 1 Unknown, 0 Unchecked, 14.4s Time] [2024-11-14 04:46:50,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2024-11-14 04:46:50,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 312. [2024-11-14 04:46:50,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 230 states have (on average 1.3217391304347825) internal successors, (304), 235 states have internal predecessors, (304), 60 states have call successors, (60), 21 states have call predecessors, (60), 21 states have return successors, (60), 58 states have call predecessors, (60), 60 states have call successors, (60) [2024-11-14 04:46:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 424 transitions. [2024-11-14 04:46:50,090 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 424 transitions. Word has length 110 [2024-11-14 04:46:50,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:46:50,091 INFO L471 AbstractCegarLoop]: Abstraction has 312 states and 424 transitions. [2024-11-14 04:46:50,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 38 states have (on average 1.236842105263158) internal successors, (47), 32 states have internal predecessors, (47), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-14 04:46:50,091 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 424 transitions. [2024-11-14 04:46:50,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-14 04:46:50,093 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:46:50,093 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:46:50,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 04:46:50,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 04:46:50,294 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:46:50,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:46:50,295 INFO L85 PathProgramCache]: Analyzing trace with hash 491490670, now seen corresponding path program 1 times [2024-11-14 04:46:50,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:46:50,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075797782] [2024-11-14 04:46:50,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:46:50,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:46:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-14 04:46:50,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:46:50,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075797782] [2024-11-14 04:46:50,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075797782] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:46:50,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626731284] [2024-11-14 04:46:50,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:46:50,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:46:50,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:46:50,458 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:46:50,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 04:46:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:50,718 INFO L255 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:46:50,720 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:46:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-11-14 04:46:50,746 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:46:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-14 04:46:50,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626731284] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:46:50,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1376137466] [2024-11-14 04:46:50,860 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2024-11-14 04:46:50,862 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:46:50,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:46:50,862 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:46:50,862 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:46:51,626 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 68 for LOIs [2024-11-14 04:46:52,287 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 56 for LOIs [2024-11-14 04:46:52,308 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:46:55,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1376137466] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:46:55,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:46:55,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [4, 4, 4] total 20 [2024-11-14 04:46:55,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936747454] [2024-11-14 04:46:55,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:46:55,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 04:46:55,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:46:55,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 04:46:55,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2024-11-14 04:46:55,195 INFO L87 Difference]: Start difference. First operand 312 states and 424 transitions. Second operand has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 11 states have internal predecessors, (47), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 04:46:57,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:46:57,543 INFO L93 Difference]: Finished difference Result 609 states and 832 transitions. [2024-11-14 04:46:57,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 04:46:57,544 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 11 states have internal predecessors, (47), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 113 [2024-11-14 04:46:57,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:46:57,547 INFO L225 Difference]: With dead ends: 609 [2024-11-14 04:46:57,547 INFO L226 Difference]: Without dead ends: 320 [2024-11-14 04:46:57,548 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 321 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2024-11-14 04:46:57,549 INFO L432 NwaCegarLoop]: 163 mSDtfsCounter, 86 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:46:57,549 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1061 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-14 04:46:57,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-11-14 04:46:57,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 313. [2024-11-14 04:46:57,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 231 states have (on average 1.3203463203463204) internal successors, (305), 236 states have internal predecessors, (305), 60 states have call successors, (60), 21 states have call predecessors, (60), 21 states have return successors, (60), 58 states have call predecessors, (60), 60 states have call successors, (60) [2024-11-14 04:46:57,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 425 transitions. [2024-11-14 04:46:57,627 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 425 transitions. Word has length 113 [2024-11-14 04:46:57,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:46:57,627 INFO L471 AbstractCegarLoop]: Abstraction has 313 states and 425 transitions. [2024-11-14 04:46:57,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 11 states have internal predecessors, (47), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 04:46:57,627 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 425 transitions. [2024-11-14 04:46:57,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-14 04:46:57,631 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:46:57,631 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:46:57,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 04:46:57,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:46:57,832 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:46:57,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:46:57,832 INFO L85 PathProgramCache]: Analyzing trace with hash -263568252, now seen corresponding path program 1 times [2024-11-14 04:46:57,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:46:57,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771471874] [2024-11-14 04:46:57,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:46:57,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:46:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-11-14 04:46:57,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:46:57,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771471874] [2024-11-14 04:46:57,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771471874] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:46:57,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981960494] [2024-11-14 04:46:57,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:46:57,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:46:57,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:46:57,977 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:46:57,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 04:46:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:58,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:46:58,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:46:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-14 04:46:58,273 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:46:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-11-14 04:46:58,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981960494] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:46:58,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [616141279] [2024-11-14 04:46:58,383 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2024-11-14 04:46:58,383 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:46:58,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:46:58,383 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:46:58,383 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:46:58,871 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 57 for LOIs [2024-11-14 04:46:59,650 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 04:46:59,756 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:47:03,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [616141279] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:47:03,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:47:03,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [4, 4, 4] total 25 [2024-11-14 04:47:03,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762339922] [2024-11-14 04:47:03,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:47:03,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 04:47:03,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:47:03,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 04:47:03,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2024-11-14 04:47:03,241 INFO L87 Difference]: Start difference. First operand 313 states and 425 transitions. Second operand has 21 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 14 states have internal predecessors, (51), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-14 04:47:05,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:47:05,292 INFO L93 Difference]: Finished difference Result 603 states and 821 transitions. [2024-11-14 04:47:05,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-14 04:47:05,292 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 14 states have internal predecessors, (51), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 115 [2024-11-14 04:47:05,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:47:05,295 INFO L225 Difference]: With dead ends: 603 [2024-11-14 04:47:05,295 INFO L226 Difference]: Without dead ends: 321 [2024-11-14 04:47:05,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 321 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2024-11-14 04:47:05,301 INFO L432 NwaCegarLoop]: 161 mSDtfsCounter, 67 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:47:05,301 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1272 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-14 04:47:05,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2024-11-14 04:47:05,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 317. [2024-11-14 04:47:05,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 234 states have (on average 1.3162393162393162) internal successors, (308), 239 states have internal predecessors, (308), 61 states have call successors, (61), 21 states have call predecessors, (61), 21 states have return successors, (61), 59 states have call predecessors, (61), 61 states have call successors, (61) [2024-11-14 04:47:05,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 430 transitions. [2024-11-14 04:47:05,517 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 430 transitions. Word has length 115 [2024-11-14 04:47:05,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:47:05,517 INFO L471 AbstractCegarLoop]: Abstraction has 317 states and 430 transitions. [2024-11-14 04:47:05,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 14 states have internal predecessors, (51), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-14 04:47:05,517 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 430 transitions. [2024-11-14 04:47:05,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-14 04:47:05,519 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:47:05,519 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:47:05,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 04:47:05,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:47:05,719 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:47:05,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:47:05,720 INFO L85 PathProgramCache]: Analyzing trace with hash -898648237, now seen corresponding path program 1 times [2024-11-14 04:47:05,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:47:05,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189983736] [2024-11-14 04:47:05,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:47:05,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:47:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:47:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-11-14 04:47:05,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:47:05,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189983736] [2024-11-14 04:47:05,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189983736] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:47:05,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720023558] [2024-11-14 04:47:05,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:47:05,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:47:05,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:47:05,881 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:47:05,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 04:47:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:47:06,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:47:06,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:47:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-11-14 04:47:06,197 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:47:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-11-14 04:47:06,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720023558] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:47:06,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1539623727] [2024-11-14 04:47:06,316 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2024-11-14 04:47:06,317 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:47:06,317 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:47:06,317 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:47:06,317 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:47:09,850 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-14 04:47:09,965 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:47:11,044 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 72 for LOIs [2024-11-14 04:47:11,175 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:47:21,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1539623727] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:47:21,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:47:21,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [4, 4, 4] total 49 [2024-11-14 04:47:21,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930766280] [2024-11-14 04:47:21,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:47:21,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-14 04:47:21,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:47:21,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-14 04:47:21,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2171, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 04:47:21,789 INFO L87 Difference]: Start difference. First operand 317 states and 430 transitions. Second operand has 45 states, 40 states have (on average 1.275) internal successors, (51), 34 states have internal predecessors, (51), 9 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-14 04:47:30,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:47:30,092 INFO L93 Difference]: Finished difference Result 627 states and 854 transitions. [2024-11-14 04:47:30,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-14 04:47:30,093 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 1.275) internal successors, (51), 34 states have internal predecessors, (51), 9 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 117 [2024-11-14 04:47:30,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:47:30,096 INFO L225 Difference]: With dead ends: 627 [2024-11-14 04:47:30,096 INFO L226 Difference]: Without dead ends: 337 [2024-11-14 04:47:30,098 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 303 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=285, Invalid=3621, Unknown=0, NotChecked=0, Total=3906 [2024-11-14 04:47:30,100 INFO L432 NwaCegarLoop]: 107 mSDtfsCounter, 145 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 3257 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 3294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:47:30,100 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 1274 Invalid, 3294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 3257 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2024-11-14 04:47:30,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2024-11-14 04:47:30,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 319. [2024-11-14 04:47:30,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 236 states have (on average 1.2923728813559323) internal successors, (305), 241 states have internal predecessors, (305), 60 states have call successors, (60), 22 states have call predecessors, (60), 22 states have return successors, (60), 58 states have call predecessors, (60), 60 states have call successors, (60) [2024-11-14 04:47:30,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 425 transitions. [2024-11-14 04:47:30,221 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 425 transitions. Word has length 117 [2024-11-14 04:47:30,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:47:30,221 INFO L471 AbstractCegarLoop]: Abstraction has 319 states and 425 transitions. [2024-11-14 04:47:30,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 1.275) internal successors, (51), 34 states have internal predecessors, (51), 9 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-14 04:47:30,222 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 425 transitions. [2024-11-14 04:47:30,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-11-14 04:47:30,223 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:47:30,224 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:47:30,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 04:47:30,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:47:30,424 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:47:30,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:47:30,425 INFO L85 PathProgramCache]: Analyzing trace with hash -2048912836, now seen corresponding path program 1 times [2024-11-14 04:47:30,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:47:30,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28310893] [2024-11-14 04:47:30,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:47:30,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:47:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:47:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-14 04:47:30,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:47:30,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28310893] [2024-11-14 04:47:30,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28310893] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:47:30,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025964505] [2024-11-14 04:47:30,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:47:30,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:47:30,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:47:30,568 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:47:30,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 04:47:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:47:30,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:47:30,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:47:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-11-14 04:47:30,885 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:47:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-14 04:47:30,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025964505] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:47:30,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [33685076] [2024-11-14 04:47:30,992 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2024-11-14 04:47:30,992 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:47:30,992 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:47:30,992 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:47:30,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:47:33,955 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-14 04:47:34,070 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:47:35,153 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 67 for LOIs [2024-11-14 04:47:35,166 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 71 for LOIs [2024-11-14 04:47:35,344 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 78 for LOIs [2024-11-14 04:47:35,611 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:47:48,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [33685076] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:47:48,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:47:48,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [4, 4, 4] total 58 [2024-11-14 04:47:48,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294882013] [2024-11-14 04:47:48,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:47:48,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-14 04:47:48,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:47:48,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-14 04:47:48,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=3097, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 04:47:48,813 INFO L87 Difference]: Start difference. First operand 319 states and 425 transitions. Second operand has 54 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 40 states have internal predecessors, (56), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 04:48:01,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:48:01,200 INFO L93 Difference]: Finished difference Result 449 states and 607 transitions. [2024-11-14 04:48:01,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-14 04:48:01,201 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 40 states have internal predecessors, (56), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) Word has length 120 [2024-11-14 04:48:01,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:48:01,204 INFO L225 Difference]: With dead ends: 449 [2024-11-14 04:48:01,204 INFO L226 Difference]: Without dead ends: 338 [2024-11-14 04:48:01,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 304 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1837 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=331, Invalid=5219, Unknown=0, NotChecked=0, Total=5550 [2024-11-14 04:48:01,209 INFO L432 NwaCegarLoop]: 104 mSDtfsCounter, 116 mSDsluCounter, 1728 mSDsCounter, 0 mSdLazyCounter, 5011 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1832 SdHoareTripleChecker+Invalid, 5038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 5011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:48:01,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1832 Invalid, 5038 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [27 Valid, 5011 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2024-11-14 04:48:01,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2024-11-14 04:48:01,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 319. [2024-11-14 04:48:01,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 237 states have (on average 1.2784810126582278) internal successors, (303), 242 states have internal predecessors, (303), 58 states have call successors, (58), 23 states have call predecessors, (58), 23 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2024-11-14 04:48:01,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 419 transitions. [2024-11-14 04:48:01,288 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 419 transitions. Word has length 120 [2024-11-14 04:48:01,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:48:01,288 INFO L471 AbstractCegarLoop]: Abstraction has 319 states and 419 transitions. [2024-11-14 04:48:01,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 40 states have internal predecessors, (56), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 04:48:01,289 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 419 transitions. [2024-11-14 04:48:01,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 04:48:01,290 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:48:01,290 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:48:01,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-14 04:48:01,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:48:01,491 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:48:01,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:48:01,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1069952085, now seen corresponding path program 1 times [2024-11-14 04:48:01,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:48:01,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044520855] [2024-11-14 04:48:01,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:48:01,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:48:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:48:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-11-14 04:48:01,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:48:01,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044520855] [2024-11-14 04:48:01,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044520855] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:48:01,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570194839] [2024-11-14 04:48:01,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:48:01,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:48:01,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:48:01,638 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:48:01,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 04:48:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:48:01,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:48:01,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:48:01,928 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 45 proven. 1 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2024-11-14 04:48:01,928 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:48:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-11-14 04:48:02,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570194839] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:48:02,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [300522865] [2024-11-14 04:48:02,024 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2024-11-14 04:48:02,024 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:48:02,025 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:48:02,025 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:48:02,025 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:48:04,808 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-14 04:48:04,924 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:48:06,082 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 72 for LOIs [2024-11-14 04:48:06,246 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 99 for LOIs [2024-11-14 04:48:06,271 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:48:17,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [300522865] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:48:17,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:48:17,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [4, 4, 4] total 54 [2024-11-14 04:48:17,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451777697] [2024-11-14 04:48:17,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:48:17,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-14 04:48:17,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:48:17,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-14 04:48:17,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2668, Unknown=0, NotChecked=0, Total=2862 [2024-11-14 04:48:17,998 INFO L87 Difference]: Start difference. First operand 319 states and 419 transitions. Second operand has 50 states, 44 states have (on average 1.25) internal successors, (55), 37 states have internal predecessors, (55), 10 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-14 04:48:27,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:48:27,882 INFO L93 Difference]: Finished difference Result 511 states and 681 transitions. [2024-11-14 04:48:27,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-14 04:48:27,883 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 44 states have (on average 1.25) internal successors, (55), 37 states have internal predecessors, (55), 10 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) Word has length 124 [2024-11-14 04:48:27,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:48:27,885 INFO L225 Difference]: With dead ends: 511 [2024-11-14 04:48:27,885 INFO L226 Difference]: Without dead ends: 342 [2024-11-14 04:48:27,886 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 319 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=313, Invalid=4657, Unknown=0, NotChecked=0, Total=4970 [2024-11-14 04:48:27,887 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 172 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 3663 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 3711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 3663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:48:27,887 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 1227 Invalid, 3711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 3663 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2024-11-14 04:48:27,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-11-14 04:48:27,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 323. [2024-11-14 04:48:27,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 240 states have (on average 1.275) internal successors, (306), 245 states have internal predecessors, (306), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2024-11-14 04:48:27,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 422 transitions. [2024-11-14 04:48:27,986 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 422 transitions. Word has length 124 [2024-11-14 04:48:27,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:48:27,987 INFO L471 AbstractCegarLoop]: Abstraction has 323 states and 422 transitions. [2024-11-14 04:48:27,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 44 states have (on average 1.25) internal successors, (55), 37 states have internal predecessors, (55), 10 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-14 04:48:27,987 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 422 transitions. [2024-11-14 04:48:27,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-14 04:48:27,989 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:48:27,989 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:48:28,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-14 04:48:28,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:48:28,190 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:48:28,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:48:28,191 INFO L85 PathProgramCache]: Analyzing trace with hash -769412267, now seen corresponding path program 1 times [2024-11-14 04:48:28,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:48:28,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243259449] [2024-11-14 04:48:28,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:48:28,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:48:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:48:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-14 04:48:28,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:48:28,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243259449] [2024-11-14 04:48:28,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243259449] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:48:28,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180031117] [2024-11-14 04:48:28,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:48:28,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:48:28,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:48:28,340 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:48:28,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 04:48:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:48:28,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:48:28,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:48:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-14 04:48:28,655 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:48:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-14 04:48:28,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180031117] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:48:28,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2145941643] [2024-11-14 04:48:28,753 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2024-11-14 04:48:28,753 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:48:28,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:48:28,753 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:48:28,754 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:48:31,556 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-14 04:48:31,675 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:48:32,664 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 81 for LOIs [2024-11-14 04:48:32,750 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 72 for LOIs [2024-11-14 04:48:32,916 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 77 for LOIs [2024-11-14 04:48:33,051 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:48:46,247 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31606#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ ~votedValue_History_1~0 1)) (= (+ ~votedValue_History_0~0 1) 0) (= |assert_#in~arg| 0) (= (+ ~g1v_new~0 1) 0) (= ~g2v~0 0) (<= ~votedValue_History_2~0 127) (= (+ ~nomsg~0 1) 0) (exists ((|v_ULTIMATE.start_check_~tmp___7~0#1_26| Int) (|v_ULTIMATE.start_check_#t~ret24#1_27| Int)) (and (= |v_ULTIMATE.start_check_#t~ret24#1_27| 0) (= |v_ULTIMATE.start_check_~tmp___7~0#1_26| 0))) (= ~g3v~0 0) (= (+ ~g3v_new~0 1) 0) (= (+ ~g2v_new~0 1) 0) (= ~g1v~0 0) (exists ((|v_ULTIMATE.start_check_#t~ret13#1_52| Int) (|v_ULTIMATE.start_check_~tmp___3~0#1_42| Int)) (and (<= 0 |v_ULTIMATE.start_check_#t~ret13#1_52|) (not (= |v_ULTIMATE.start_check_#t~ret13#1_52| 0)) (<= |v_ULTIMATE.start_check_#t~ret13#1_52| 1) (= |v_ULTIMATE.start_check_~tmp___3~0#1_42| 1))) (= (+ ~VALUE2~0 1) 0) (<= ~votedValue_History_1~0 127) (= (+ ~VALUE3~0 1) 0) (<= 0 (+ ~votedValue_History_2~0 128)) (= (+ ~VALUE1~0 1) 0))' at error location [2024-11-14 04:48:46,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:48:46,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:48:46,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-14 04:48:46,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649742501] [2024-11-14 04:48:46,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:48:46,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:48:46,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:48:46,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:48:46,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=3323, Unknown=0, NotChecked=0, Total=3540 [2024-11-14 04:48:46,249 INFO L87 Difference]: Start difference. First operand 323 states and 422 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) [2024-11-14 04:48:46,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:48:46,452 INFO L93 Difference]: Finished difference Result 757 states and 1010 transitions. [2024-11-14 04:48:46,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:48:46,453 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) Word has length 126 [2024-11-14 04:48:46,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:48:46,456 INFO L225 Difference]: With dead ends: 757 [2024-11-14 04:48:46,456 INFO L226 Difference]: Without dead ends: 444 [2024-11-14 04:48:46,458 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 320 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=217, Invalid=3323, Unknown=0, NotChecked=0, Total=3540 [2024-11-14 04:48:46,458 INFO L432 NwaCegarLoop]: 180 mSDtfsCounter, 104 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:48:46,458 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 373 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:48:46,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2024-11-14 04:48:46,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 428. [2024-11-14 04:48:46,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 328 states have (on average 1.2652439024390243) internal successors, (415), 333 states have internal predecessors, (415), 75 states have call successors, (75), 24 states have call predecessors, (75), 24 states have return successors, (75), 73 states have call predecessors, (75), 75 states have call successors, (75) [2024-11-14 04:48:46,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 565 transitions. [2024-11-14 04:48:46,591 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 565 transitions. Word has length 126 [2024-11-14 04:48:46,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:48:46,591 INFO L471 AbstractCegarLoop]: Abstraction has 428 states and 565 transitions. [2024-11-14 04:48:46,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) [2024-11-14 04:48:46,592 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 565 transitions. [2024-11-14 04:48:46,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-11-14 04:48:46,594 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:48:46,594 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:48:46,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-14 04:48:46,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:48:46,795 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:48:46,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:48:46,795 INFO L85 PathProgramCache]: Analyzing trace with hash 159271672, now seen corresponding path program 1 times [2024-11-14 04:48:46,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:48:46,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241982145] [2024-11-14 04:48:46,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:48:46,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:48:46,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:48:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2024-11-14 04:48:46,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:48:46,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241982145] [2024-11-14 04:48:46,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241982145] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:48:46,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399253564] [2024-11-14 04:48:46,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:48:46,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:48:46,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:48:46,962 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:48:46,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 04:48:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:48:47,215 INFO L255 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:48:47,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:48:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2024-11-14 04:48:47,242 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:48:47,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399253564] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:48:47,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:48:47,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-14 04:48:47,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119438226] [2024-11-14 04:48:47,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:48:47,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:48:47,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:48:47,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:48:47,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:48:47,243 INFO L87 Difference]: Start difference. First operand 428 states and 565 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 04:48:47,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:48:47,521 INFO L93 Difference]: Finished difference Result 741 states and 980 transitions. [2024-11-14 04:48:47,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:48:47,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 156 [2024-11-14 04:48:47,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:48:47,523 INFO L225 Difference]: With dead ends: 741 [2024-11-14 04:48:47,524 INFO L226 Difference]: Without dead ends: 394 [2024-11-14 04:48:47,524 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:48:47,525 INFO L432 NwaCegarLoop]: 167 mSDtfsCounter, 31 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:48:47,525 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 467 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:48:47,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2024-11-14 04:48:47,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2024-11-14 04:48:47,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 300 states have (on average 1.2566666666666666) internal successors, (377), 305 states have internal predecessors, (377), 69 states have call successors, (69), 24 states have call predecessors, (69), 24 states have return successors, (69), 67 states have call predecessors, (69), 69 states have call successors, (69) [2024-11-14 04:48:47,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 515 transitions. [2024-11-14 04:48:47,626 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 515 transitions. Word has length 156 [2024-11-14 04:48:47,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:48:47,626 INFO L471 AbstractCegarLoop]: Abstraction has 394 states and 515 transitions. [2024-11-14 04:48:47,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 04:48:47,627 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 515 transitions. [2024-11-14 04:48:47,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-14 04:48:47,628 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:48:47,628 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:48:47,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-14 04:48:47,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-14 04:48:47,829 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:48:47,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:48:47,829 INFO L85 PathProgramCache]: Analyzing trace with hash -543070728, now seen corresponding path program 1 times [2024-11-14 04:48:47,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:48:47,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677085817] [2024-11-14 04:48:47,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:48:47,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:48:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:48:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2024-11-14 04:48:47,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:48:47,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677085817] [2024-11-14 04:48:47,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677085817] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:48:47,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916456835] [2024-11-14 04:48:47,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:48:47,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:48:47,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:48:47,986 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:48:47,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 04:48:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:48:48,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:48:48,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:48:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2024-11-14 04:48:48,264 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:48:48,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916456835] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:48:48,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:48:48,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-14 04:48:48,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974726913] [2024-11-14 04:48:48,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:48:48,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:48:48,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:48:48,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:48:48,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:48:48,266 INFO L87 Difference]: Start difference. First operand 394 states and 515 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 04:48:48,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:48:48,441 INFO L93 Difference]: Finished difference Result 686 states and 902 transitions. [2024-11-14 04:48:48,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:48:48,441 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 160 [2024-11-14 04:48:48,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:48:48,444 INFO L225 Difference]: With dead ends: 686 [2024-11-14 04:48:48,445 INFO L226 Difference]: Without dead ends: 356 [2024-11-14 04:48:48,445 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:48:48,446 INFO L432 NwaCegarLoop]: 166 mSDtfsCounter, 33 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:48:48,446 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 463 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:48:48,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2024-11-14 04:48:48,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2024-11-14 04:48:48,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 268 states have (on average 1.2350746268656716) internal successors, (331), 273 states have internal predecessors, (331), 63 states have call successors, (63), 24 states have call predecessors, (63), 24 states have return successors, (63), 61 states have call predecessors, (63), 63 states have call successors, (63) [2024-11-14 04:48:48,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 457 transitions. [2024-11-14 04:48:48,539 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 457 transitions. Word has length 160 [2024-11-14 04:48:48,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:48:48,539 INFO L471 AbstractCegarLoop]: Abstraction has 356 states and 457 transitions. [2024-11-14 04:48:48,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 04:48:48,540 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 457 transitions. [2024-11-14 04:48:48,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2024-11-14 04:48:48,541 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:48:48,542 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:48:48,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-14 04:48:48,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-14 04:48:48,742 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:48:48,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:48:48,743 INFO L85 PathProgramCache]: Analyzing trace with hash -618505368, now seen corresponding path program 1 times [2024-11-14 04:48:48,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:48:48,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572643902] [2024-11-14 04:48:48,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:48:48,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:48:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:48:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-11-14 04:48:48,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:48:48,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572643902] [2024-11-14 04:48:48,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572643902] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:48:48,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144618449] [2024-11-14 04:48:48,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:48:48,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:48:48,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:48:48,892 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:48:48,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-14 04:48:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:48:49,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 04:48:49,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:48:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2024-11-14 04:48:49,200 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:48:49,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144618449] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:48:49,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:48:49,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-14 04:48:49,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573451142] [2024-11-14 04:48:49,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:48:49,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:48:49,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:48:49,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:48:49,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:48:49,201 INFO L87 Difference]: Start difference. First operand 356 states and 457 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-14 04:48:49,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:48:49,348 INFO L93 Difference]: Finished difference Result 573 states and 746 transitions. [2024-11-14 04:48:49,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:48:49,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 163 [2024-11-14 04:48:49,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:48:49,352 INFO L225 Difference]: With dead ends: 573 [2024-11-14 04:48:49,353 INFO L226 Difference]: Without dead ends: 360 [2024-11-14 04:48:49,353 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:48:49,354 INFO L432 NwaCegarLoop]: 179 mSDtfsCounter, 0 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:48:49,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 712 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:48:49,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2024-11-14 04:48:49,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 356. [2024-11-14 04:48:49,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 268 states have (on average 1.212686567164179) internal successors, (325), 273 states have internal predecessors, (325), 63 states have call successors, (63), 24 states have call predecessors, (63), 24 states have return successors, (63), 61 states have call predecessors, (63), 63 states have call successors, (63) [2024-11-14 04:48:49,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 451 transitions. [2024-11-14 04:48:49,459 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 451 transitions. Word has length 163 [2024-11-14 04:48:49,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:48:49,459 INFO L471 AbstractCegarLoop]: Abstraction has 356 states and 451 transitions. [2024-11-14 04:48:49,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-14 04:48:49,460 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 451 transitions. [2024-11-14 04:48:49,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2024-11-14 04:48:49,461 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:48:49,461 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:48:49,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-14 04:48:49,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-14 04:48:49,662 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:48:49,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:48:49,662 INFO L85 PathProgramCache]: Analyzing trace with hash 763282617, now seen corresponding path program 1 times [2024-11-14 04:48:49,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:48:49,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572777180] [2024-11-14 04:48:49,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:48:49,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:48:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:48:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2024-11-14 04:48:49,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:48:49,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572777180] [2024-11-14 04:48:49,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572777180] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:48:49,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112353037] [2024-11-14 04:48:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:48:49,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:48:49,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:48:49,915 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:48:49,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 04:48:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:48:50,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 04:48:50,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:48:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 150 proven. 31 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-11-14 04:48:50,572 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:48:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 86 proven. 28 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2024-11-14 04:48:51,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112353037] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:48:51,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1860993497] [2024-11-14 04:48:51,158 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2024-11-14 04:48:51,158 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:48:51,159 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:48:51,159 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:48:51,159 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:48:53,775 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-14 04:48:53,879 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:48:54,932 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 81 for LOIs [2024-11-14 04:48:54,977 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 72 for LOIs [2024-11-14 04:48:55,147 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 61 for LOIs [2024-11-14 04:48:55,174 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:49:11,313 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40117#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ ~votedValue_History_1~0 1)) (= (+ ~votedValue_History_0~0 1) 0) (exists ((|v_ULTIMATE.start_check_~tmp___7~0#1_30| Int) (|v_ULTIMATE.start_check_#t~ret24#1_32| Int)) (and (= |v_ULTIMATE.start_check_~tmp___7~0#1_30| 0) (= |v_ULTIMATE.start_check_#t~ret24#1_32| 0))) (= |assert_#in~arg| 0) (= (+ ~g1v_new~0 1) 0) (= ~g2v~0 0) (<= ~votedValue_History_2~0 127) (= (+ ~nomsg~0 1) 0) (= ~g3v~0 0) (= (+ ~g3v_new~0 1) 0) (= (+ ~g2v_new~0 1) 0) (= ~g1v~0 0) (= (+ ~VALUE2~0 1) 0) (<= ~votedValue_History_1~0 127) (= (+ ~VALUE3~0 1) 0) (exists ((|v_ULTIMATE.start_check_~tmp___3~0#1_46| Int) (|v_ULTIMATE.start_check_#t~ret13#1_57| Int)) (and (<= |v_ULTIMATE.start_check_#t~ret13#1_57| 1) (= |v_ULTIMATE.start_check_~tmp___3~0#1_46| 1) (<= 0 |v_ULTIMATE.start_check_#t~ret13#1_57|) (not (= |v_ULTIMATE.start_check_#t~ret13#1_57| 0)))) (<= 0 (+ ~votedValue_History_2~0 128)) (= (+ ~VALUE1~0 1) 0))' at error location [2024-11-14 04:49:11,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:49:11,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:49:11,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 13] total 22 [2024-11-14 04:49:11,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130816053] [2024-11-14 04:49:11,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:49:11,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-14 04:49:11,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:49:11,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-14 04:49:11,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=6457, Unknown=0, NotChecked=0, Total=6806 [2024-11-14 04:49:11,316 INFO L87 Difference]: Start difference. First operand 356 states and 451 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 18 states have internal predecessors, (138), 5 states have call successors, (33), 4 states have call predecessors, (33), 9 states have return successors, (34), 8 states have call predecessors, (34), 5 states have call successors, (34) [2024-11-14 04:49:13,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:49:13,120 INFO L93 Difference]: Finished difference Result 878 states and 1134 transitions. [2024-11-14 04:49:13,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-14 04:49:13,120 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 18 states have internal predecessors, (138), 5 states have call successors, (33), 4 states have call predecessors, (33), 9 states have return successors, (34), 8 states have call predecessors, (34), 5 states have call successors, (34) Word has length 191 [2024-11-14 04:49:13,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:49:13,123 INFO L225 Difference]: With dead ends: 878 [2024-11-14 04:49:13,124 INFO L226 Difference]: Without dead ends: 581 [2024-11-14 04:49:13,126 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 493 SyntacticMatches, 8 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3076 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=483, Invalid=9417, Unknown=0, NotChecked=0, Total=9900 [2024-11-14 04:49:13,127 INFO L432 NwaCegarLoop]: 235 mSDtfsCounter, 168 mSDsluCounter, 2994 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 3229 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:49:13,127 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 3229 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 04:49:13,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2024-11-14 04:49:13,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 561. [2024-11-14 04:49:13,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 419 states have (on average 1.2147971360381862) internal successors, (509), 429 states have internal predecessors, (509), 99 states have call successors, (99), 41 states have call predecessors, (99), 42 states have return successors, (100), 95 states have call predecessors, (100), 99 states have call successors, (100) [2024-11-14 04:49:13,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 708 transitions. [2024-11-14 04:49:13,235 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 708 transitions. Word has length 191 [2024-11-14 04:49:13,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:49:13,235 INFO L471 AbstractCegarLoop]: Abstraction has 561 states and 708 transitions. [2024-11-14 04:49:13,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 18 states have internal predecessors, (138), 5 states have call successors, (33), 4 states have call predecessors, (33), 9 states have return successors, (34), 8 states have call predecessors, (34), 5 states have call successors, (34) [2024-11-14 04:49:13,236 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 708 transitions. [2024-11-14 04:49:13,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2024-11-14 04:49:13,238 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:49:13,238 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 10, 9, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:49:13,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-14 04:49:13,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-14 04:49:13,438 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:49:13,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:49:13,439 INFO L85 PathProgramCache]: Analyzing trace with hash -713821838, now seen corresponding path program 1 times [2024-11-14 04:49:13,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:49:13,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967750250] [2024-11-14 04:49:13,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:49:13,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:49:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:49:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2024-11-14 04:49:13,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:49:13,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967750250] [2024-11-14 04:49:13,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967750250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:49:13,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404661337] [2024-11-14 04:49:13,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:49:13,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:49:13,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:49:13,625 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:49:13,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-14 04:49:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:49:13,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:49:13,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:49:13,966 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 185 proven. 9 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2024-11-14 04:49:13,966 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:49:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked. [2024-11-14 04:49:14,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404661337] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 04:49:14,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:49:14,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2024-11-14 04:49:14,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227097269] [2024-11-14 04:49:14,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:49:14,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:49:14,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:49:14,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:49:14,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:49:14,140 INFO L87 Difference]: Start difference. First operand 561 states and 708 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 04:49:14,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:49:14,304 INFO L93 Difference]: Finished difference Result 847 states and 1096 transitions. [2024-11-14 04:49:14,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:49:14,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 208 [2024-11-14 04:49:14,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:49:14,307 INFO L225 Difference]: With dead ends: 847 [2024-11-14 04:49:14,308 INFO L226 Difference]: Without dead ends: 411 [2024-11-14 04:49:14,308 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 412 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:49:14,309 INFO L432 NwaCegarLoop]: 175 mSDtfsCounter, 26 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:49:14,309 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 325 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:49:14,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2024-11-14 04:49:14,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2024-11-14 04:49:14,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 309 states have (on average 1.2297734627831716) internal successors, (380), 315 states have internal predecessors, (380), 72 states have call successors, (72), 29 states have call predecessors, (72), 29 states have return successors, (72), 71 states have call predecessors, (72), 72 states have call successors, (72) [2024-11-14 04:49:14,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 524 transitions. [2024-11-14 04:49:14,369 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 524 transitions. Word has length 208 [2024-11-14 04:49:14,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:49:14,370 INFO L471 AbstractCegarLoop]: Abstraction has 411 states and 524 transitions. [2024-11-14 04:49:14,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 04:49:14,370 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 524 transitions. [2024-11-14 04:49:14,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2024-11-14 04:49:14,370 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:49:14,371 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 8, 8, 7, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:49:14,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-14 04:49:14,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-14 04:49:14,571 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:49:14,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:49:14,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1258348675, now seen corresponding path program 1 times [2024-11-14 04:49:14,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:49:14,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802483269] [2024-11-14 04:49:14,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:49:14,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:49:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:49:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2024-11-14 04:49:14,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:49:14,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802483269] [2024-11-14 04:49:14,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802483269] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:49:14,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937937042] [2024-11-14 04:49:14,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:49:14,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:49:14,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:49:14,757 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:49:14,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-14 04:49:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:49:15,052 INFO L255 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 04:49:15,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:49:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2024-11-14 04:49:15,082 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:49:15,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937937042] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:49:15,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:49:15,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-14 04:49:15,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677422806] [2024-11-14 04:49:15,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:49:15,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:49:15,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:49:15,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:49:15,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:49:15,084 INFO L87 Difference]: Start difference. First operand 411 states and 524 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-14 04:49:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:49:15,235 INFO L93 Difference]: Finished difference Result 607 states and 813 transitions. [2024-11-14 04:49:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:49:15,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 211 [2024-11-14 04:49:15,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:49:15,238 INFO L225 Difference]: With dead ends: 607 [2024-11-14 04:49:15,238 INFO L226 Difference]: Without dead ends: 419 [2024-11-14 04:49:15,239 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:49:15,239 INFO L432 NwaCegarLoop]: 173 mSDtfsCounter, 3 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:49:15,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 512 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:49:15,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2024-11-14 04:49:15,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 419. [2024-11-14 04:49:15,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 315 states have (on average 1.2222222222222223) internal successors, (385), 321 states have internal predecessors, (385), 72 states have call successors, (72), 31 states have call predecessors, (72), 31 states have return successors, (72), 71 states have call predecessors, (72), 72 states have call successors, (72) [2024-11-14 04:49:15,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 529 transitions. [2024-11-14 04:49:15,302 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 529 transitions. Word has length 211 [2024-11-14 04:49:15,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:49:15,303 INFO L471 AbstractCegarLoop]: Abstraction has 419 states and 529 transitions. [2024-11-14 04:49:15,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-14 04:49:15,303 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 529 transitions. [2024-11-14 04:49:15,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2024-11-14 04:49:15,304 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:49:15,304 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 8, 8, 7, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:49:15,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-14 04:49:15,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:49:15,505 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:49:15,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:49:15,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1608161402, now seen corresponding path program 2 times [2024-11-14 04:49:15,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:49:15,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354245055] [2024-11-14 04:49:15,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:49:15,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:49:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:49:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2024-11-14 04:49:15,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:49:15,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354245055] [2024-11-14 04:49:15,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354245055] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:49:15,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099236892] [2024-11-14 04:49:15,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:49:15,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:49:15,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:49:15,728 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:49:15,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-14 04:49:15,986 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 04:49:15,986 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:49:15,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 04:49:15,993 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:49:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2024-11-14 04:49:16,014 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:49:16,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099236892] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:49:16,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:49:16,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-14 04:49:16,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993429771] [2024-11-14 04:49:16,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:49:16,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:49:16,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:49:16,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:49:16,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:49:16,016 INFO L87 Difference]: Start difference. First operand 419 states and 529 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-14 04:49:16,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:49:16,158 INFO L93 Difference]: Finished difference Result 623 states and 827 transitions. [2024-11-14 04:49:16,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:49:16,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 217 [2024-11-14 04:49:16,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:49:16,160 INFO L225 Difference]: With dead ends: 623 [2024-11-14 04:49:16,160 INFO L226 Difference]: Without dead ends: 429 [2024-11-14 04:49:16,161 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:49:16,161 INFO L432 NwaCegarLoop]: 174 mSDtfsCounter, 4 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:49:16,162 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 514 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:49:16,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2024-11-14 04:49:16,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2024-11-14 04:49:16,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 323 states have (on average 1.21671826625387) internal successors, (393), 329 states have internal predecessors, (393), 72 states have call successors, (72), 33 states have call predecessors, (72), 33 states have return successors, (72), 71 states have call predecessors, (72), 72 states have call successors, (72) [2024-11-14 04:49:16,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 537 transitions. [2024-11-14 04:49:16,252 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 537 transitions. Word has length 217 [2024-11-14 04:49:16,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:49:16,253 INFO L471 AbstractCegarLoop]: Abstraction has 429 states and 537 transitions. [2024-11-14 04:49:16,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-14 04:49:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 537 transitions. [2024-11-14 04:49:16,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2024-11-14 04:49:16,254 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:49:16,254 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:49:16,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-14 04:49:16,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:49:16,456 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:49:16,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:49:16,457 INFO L85 PathProgramCache]: Analyzing trace with hash 260908577, now seen corresponding path program 1 times [2024-11-14 04:49:16,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:49:16,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41090814] [2024-11-14 04:49:16,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:49:16,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:49:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:49:16,639 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2024-11-14 04:49:16,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:49:16,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41090814] [2024-11-14 04:49:16,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41090814] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:49:16,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160670480] [2024-11-14 04:49:16,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:49:16,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:49:16,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:49:16,643 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:49:16,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-14 04:49:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:49:16,997 INFO L255 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-14 04:49:17,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:49:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 129 proven. 12 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2024-11-14 04:49:17,959 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:49:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2024-11-14 04:49:19,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160670480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:49:19,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [108821985] [2024-11-14 04:49:19,557 INFO L159 IcfgInterpreter]: Started Sifa with 84 locations of interest [2024-11-14 04:49:19,557 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:49:19,558 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:49:19,558 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:49:19,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:49:22,865 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-14 04:49:22,983 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:49:24,033 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 04:49:24,171 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 125 for LOIs [2024-11-14 04:49:24,428 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:49:47,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [108821985] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:49:47,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:49:47,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [5, 22, 20] total 104 [2024-11-14 04:49:47,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742756218] [2024-11-14 04:49:47,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:49:47,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-14 04:49:47,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:49:47,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-14 04:49:47,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=10016, Unknown=0, NotChecked=0, Total=10712 [2024-11-14 04:49:47,041 INFO L87 Difference]: Start difference. First operand 429 states and 537 transitions. Second operand has 63 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 45 states have internal predecessors, (69), 14 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 17 states have call predecessors, (17), 13 states have call successors, (17) [2024-11-14 04:50:03,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:50:03,464 INFO L93 Difference]: Finished difference Result 634 states and 830 transitions. [2024-11-14 04:50:03,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-14 04:50:03,465 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 45 states have internal predecessors, (69), 14 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 17 states have call predecessors, (17), 13 states have call successors, (17) Word has length 221 [2024-11-14 04:50:03,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:50:03,468 INFO L225 Difference]: With dead ends: 634 [2024-11-14 04:50:03,468 INFO L226 Difference]: Without dead ends: 430 [2024-11-14 04:50:03,475 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 559 SyntacticMatches, 5 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6626 ImplicationChecksByTransitivity, 32.7s TimeCoverageRelationStatistics Valid=1116, Invalid=17244, Unknown=0, NotChecked=0, Total=18360 [2024-11-14 04:50:03,476 INFO L432 NwaCegarLoop]: 106 mSDtfsCounter, 59 mSDsluCounter, 1543 mSDsCounter, 0 mSdLazyCounter, 4617 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 4633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:50:03,477 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1649 Invalid, 4633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4617 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2024-11-14 04:50:03,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2024-11-14 04:50:03,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 429. [2024-11-14 04:50:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 323 states have (on average 1.2136222910216719) internal successors, (392), 329 states have internal predecessors, (392), 72 states have call successors, (72), 33 states have call predecessors, (72), 33 states have return successors, (72), 71 states have call predecessors, (72), 72 states have call successors, (72) [2024-11-14 04:50:03,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 536 transitions. [2024-11-14 04:50:03,588 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 536 transitions. Word has length 221 [2024-11-14 04:50:03,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:50:03,588 INFO L471 AbstractCegarLoop]: Abstraction has 429 states and 536 transitions. [2024-11-14 04:50:03,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 45 states have internal predecessors, (69), 14 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 17 states have call predecessors, (17), 13 states have call successors, (17) [2024-11-14 04:50:03,589 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 536 transitions. [2024-11-14 04:50:03,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2024-11-14 04:50:03,590 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:50:03,590 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 8, 8, 7, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:50:03,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-14 04:50:03,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:50:03,791 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:50:03,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:50:03,792 INFO L85 PathProgramCache]: Analyzing trace with hash -145603445, now seen corresponding path program 3 times [2024-11-14 04:50:03,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:50:03,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012023617] [2024-11-14 04:50:03,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:50:03,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:50:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:50:03,979 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-14 04:50:03,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:50:03,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012023617] [2024-11-14 04:50:03,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012023617] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:50:03,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371506595] [2024-11-14 04:50:03,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:50:03,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:50:03,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:50:03,982 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:50:03,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-14 04:50:04,369 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:50:04,369 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:50:04,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 04:50:04,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:50:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2024-11-14 04:50:04,400 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:50:04,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371506595] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:50:04,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:50:04,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-14 04:50:04,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211485282] [2024-11-14 04:50:04,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:50:04,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:50:04,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:50:04,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:50:04,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:50:04,402 INFO L87 Difference]: Start difference. First operand 429 states and 536 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-14 04:50:04,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:50:04,582 INFO L93 Difference]: Finished difference Result 631 states and 826 transitions. [2024-11-14 04:50:04,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:50:04,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 224 [2024-11-14 04:50:04,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:50:04,585 INFO L225 Difference]: With dead ends: 631 [2024-11-14 04:50:04,585 INFO L226 Difference]: Without dead ends: 427 [2024-11-14 04:50:04,586 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:50:04,586 INFO L432 NwaCegarLoop]: 171 mSDtfsCounter, 5 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:50:04,587 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 504 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:50:04,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2024-11-14 04:50:04,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2024-11-14 04:50:04,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 323 states have (on average 1.195046439628483) internal successors, (386), 327 states have internal predecessors, (386), 70 states have call successors, (70), 33 states have call predecessors, (70), 33 states have return successors, (70), 69 states have call predecessors, (70), 70 states have call successors, (70) [2024-11-14 04:50:04,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 526 transitions. [2024-11-14 04:50:04,704 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 526 transitions. Word has length 224 [2024-11-14 04:50:04,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:50:04,704 INFO L471 AbstractCegarLoop]: Abstraction has 427 states and 526 transitions. [2024-11-14 04:50:04,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-14 04:50:04,705 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 526 transitions. [2024-11-14 04:50:04,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2024-11-14 04:50:04,707 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:50:04,707 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 8, 8, 7, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:50:04,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-14 04:50:04,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-14 04:50:04,908 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:50:04,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:50:04,908 INFO L85 PathProgramCache]: Analyzing trace with hash 544497747, now seen corresponding path program 1 times [2024-11-14 04:50:04,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:50:04,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408008266] [2024-11-14 04:50:04,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:50:04,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:50:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:50:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2024-11-14 04:50:05,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:50:05,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408008266] [2024-11-14 04:50:05,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408008266] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:50:05,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281788928] [2024-11-14 04:50:05,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:50:05,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:50:05,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:50:05,135 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:50:05,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-14 04:50:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:50:05,534 INFO L255 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 04:50:05,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:50:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2024-11-14 04:50:05,556 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:50:05,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281788928] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:50:05,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:50:05,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-14 04:50:05,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958664896] [2024-11-14 04:50:05,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:50:05,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:50:05,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:50:05,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:50:05,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:50:05,559 INFO L87 Difference]: Start difference. First operand 427 states and 526 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-14 04:50:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:50:05,712 INFO L93 Difference]: Finished difference Result 570 states and 720 transitions. [2024-11-14 04:50:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:50:05,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 230 [2024-11-14 04:50:05,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:50:05,716 INFO L225 Difference]: With dead ends: 570 [2024-11-14 04:50:05,716 INFO L226 Difference]: Without dead ends: 368 [2024-11-14 04:50:05,716 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:50:05,717 INFO L432 NwaCegarLoop]: 169 mSDtfsCounter, 0 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:50:05,717 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 337 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:50:05,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2024-11-14 04:50:05,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 366. [2024-11-14 04:50:05,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 281 states have (on average 1.1601423487544484) internal successors, (326), 283 states have internal predecessors, (326), 54 states have call successors, (54), 30 states have call predecessors, (54), 30 states have return successors, (54), 53 states have call predecessors, (54), 54 states have call successors, (54) [2024-11-14 04:50:05,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 434 transitions. [2024-11-14 04:50:05,829 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 434 transitions. Word has length 230 [2024-11-14 04:50:05,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:50:05,830 INFO L471 AbstractCegarLoop]: Abstraction has 366 states and 434 transitions. [2024-11-14 04:50:05,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-14 04:50:05,830 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 434 transitions. [2024-11-14 04:50:05,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2024-11-14 04:50:05,832 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:50:05,832 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 8, 8, 7, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:50:05,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-14 04:50:06,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-14 04:50:06,034 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:50:06,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:50:06,034 INFO L85 PathProgramCache]: Analyzing trace with hash -733999089, now seen corresponding path program 1 times [2024-11-14 04:50:06,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:50:06,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216156211] [2024-11-14 04:50:06,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:50:06,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:50:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:50:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2024-11-14 04:50:06,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:50:06,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216156211] [2024-11-14 04:50:06,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216156211] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:50:06,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591971000] [2024-11-14 04:50:06,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:50:06,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:50:06,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:50:06,264 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:50:06,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-14 04:50:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:50:06,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 04:50:06,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:50:06,706 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2024-11-14 04:50:06,706 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:50:06,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591971000] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:50:06,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:50:06,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-14 04:50:06,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870226933] [2024-11-14 04:50:06,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:50:06,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:50:06,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:50:06,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:50:06,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:50:06,708 INFO L87 Difference]: Start difference. First operand 366 states and 434 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-14 04:50:07,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:50:07,132 INFO L93 Difference]: Finished difference Result 668 states and 843 transitions. [2024-11-14 04:50:07,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:50:07,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 233 [2024-11-14 04:50:07,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:50:07,137 INFO L225 Difference]: With dead ends: 668 [2024-11-14 04:50:07,137 INFO L226 Difference]: Without dead ends: 555 [2024-11-14 04:50:07,137 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:50:07,138 INFO L432 NwaCegarLoop]: 362 mSDtfsCounter, 213 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:50:07,138 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 712 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:50:07,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2024-11-14 04:50:07,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 402. [2024-11-14 04:50:07,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 304 states have (on average 1.1776315789473684) internal successors, (358), 306 states have internal predecessors, (358), 67 states have call successors, (67), 30 states have call predecessors, (67), 30 states have return successors, (67), 65 states have call predecessors, (67), 67 states have call successors, (67) [2024-11-14 04:50:07,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 492 transitions. [2024-11-14 04:50:07,249 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 492 transitions. Word has length 233 [2024-11-14 04:50:07,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:50:07,250 INFO L471 AbstractCegarLoop]: Abstraction has 402 states and 492 transitions. [2024-11-14 04:50:07,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-14 04:50:07,250 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 492 transitions. [2024-11-14 04:50:07,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2024-11-14 04:50:07,252 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:50:07,253 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 7, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:50:07,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-14 04:50:07,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-14 04:50:07,453 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:50:07,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:50:07,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2056176707, now seen corresponding path program 1 times [2024-11-14 04:50:07,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:50:07,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224654311] [2024-11-14 04:50:07,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:50:07,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:50:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:50:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2024-11-14 04:50:07,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:50:07,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224654311] [2024-11-14 04:50:07,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224654311] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:50:07,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218966094] [2024-11-14 04:50:07,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:50:07,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:50:07,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:50:07,657 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:50:07,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-14 04:50:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:50:08,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 04:50:08,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:50:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2024-11-14 04:50:08,104 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:50:08,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218966094] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:50:08,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:50:08,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-14 04:50:08,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134266196] [2024-11-14 04:50:08,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:50:08,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:50:08,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:50:08,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:50:08,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:50:08,106 INFO L87 Difference]: Start difference. First operand 402 states and 492 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-14 04:50:08,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:50:08,294 INFO L93 Difference]: Finished difference Result 575 states and 752 transitions. [2024-11-14 04:50:08,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:50:08,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 241 [2024-11-14 04:50:08,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:50:08,297 INFO L225 Difference]: With dead ends: 575 [2024-11-14 04:50:08,297 INFO L226 Difference]: Without dead ends: 398 [2024-11-14 04:50:08,298 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:50:08,298 INFO L432 NwaCegarLoop]: 150 mSDtfsCounter, 3 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:50:08,299 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 439 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:50:08,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2024-11-14 04:50:08,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2024-11-14 04:50:08,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 302 states have (on average 1.1721854304635762) internal successors, (354), 304 states have internal predecessors, (354), 65 states have call successors, (65), 30 states have call predecessors, (65), 30 states have return successors, (65), 63 states have call predecessors, (65), 65 states have call successors, (65) [2024-11-14 04:50:08,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 484 transitions. [2024-11-14 04:50:08,383 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 484 transitions. Word has length 241 [2024-11-14 04:50:08,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:50:08,384 INFO L471 AbstractCegarLoop]: Abstraction has 398 states and 484 transitions. [2024-11-14 04:50:08,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-14 04:50:08,384 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 484 transitions. [2024-11-14 04:50:08,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2024-11-14 04:50:08,386 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:50:08,386 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 7, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:50:08,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-14 04:50:08,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-14 04:50:08,589 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:50:08,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:50:08,590 INFO L85 PathProgramCache]: Analyzing trace with hash -164667356, now seen corresponding path program 1 times [2024-11-14 04:50:08,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:50:08,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950267604] [2024-11-14 04:50:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:50:08,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:50:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:50:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2024-11-14 04:50:08,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:50:08,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950267604] [2024-11-14 04:50:08,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950267604] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:50:08,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739769985] [2024-11-14 04:50:08,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:50:08,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:50:08,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:50:08,819 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:50:08,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-14 04:50:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:50:09,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 04:50:09,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:50:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2024-11-14 04:50:09,266 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:50:09,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739769985] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:50:09,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:50:09,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-14 04:50:09,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422293641] [2024-11-14 04:50:09,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:50:09,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:50:09,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:50:09,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:50:09,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:50:09,268 INFO L87 Difference]: Start difference. First operand 398 states and 484 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-14 04:50:09,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:50:09,498 INFO L93 Difference]: Finished difference Result 581 states and 740 transitions. [2024-11-14 04:50:09,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:50:09,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 243 [2024-11-14 04:50:09,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:50:09,502 INFO L225 Difference]: With dead ends: 581 [2024-11-14 04:50:09,502 INFO L226 Difference]: Without dead ends: 408 [2024-11-14 04:50:09,503 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:50:09,504 INFO L432 NwaCegarLoop]: 158 mSDtfsCounter, 4 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:50:09,504 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 461 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:50:09,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2024-11-14 04:50:09,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2024-11-14 04:50:09,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 310 states have (on average 1.167741935483871) internal successors, (362), 312 states have internal predecessors, (362), 65 states have call successors, (65), 32 states have call predecessors, (65), 32 states have return successors, (65), 63 states have call predecessors, (65), 65 states have call successors, (65) [2024-11-14 04:50:09,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 492 transitions. [2024-11-14 04:50:09,598 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 492 transitions. Word has length 243 [2024-11-14 04:50:09,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:50:09,599 INFO L471 AbstractCegarLoop]: Abstraction has 408 states and 492 transitions. [2024-11-14 04:50:09,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-14 04:50:09,599 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 492 transitions. [2024-11-14 04:50:09,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2024-11-14 04:50:09,601 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:50:09,601 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 7, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:50:09,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-14 04:50:09,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-14 04:50:09,802 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:50:09,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:50:09,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1469951268, now seen corresponding path program 1 times [2024-11-14 04:50:09,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:50:09,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298345982] [2024-11-14 04:50:09,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:50:09,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:50:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:50:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2024-11-14 04:50:09,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:50:09,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298345982] [2024-11-14 04:50:09,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298345982] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:50:09,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745352087] [2024-11-14 04:50:09,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:50:09,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:50:09,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:50:09,989 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:50:09,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-14 04:50:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:50:10,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 04:50:10,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:50:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2024-11-14 04:50:10,410 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:50:10,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745352087] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:50:10,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:50:10,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-14 04:50:10,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645436192] [2024-11-14 04:50:10,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:50:10,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:50:10,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:50:10,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:50:10,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:50:10,411 INFO L87 Difference]: Start difference. First operand 408 states and 492 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2024-11-14 04:50:10,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:50:10,578 INFO L93 Difference]: Finished difference Result 587 states and 738 transitions. [2024-11-14 04:50:10,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:50:10,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 251 [2024-11-14 04:50:10,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:50:10,582 INFO L225 Difference]: With dead ends: 587 [2024-11-14 04:50:10,582 INFO L226 Difference]: Without dead ends: 404 [2024-11-14 04:50:10,583 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:50:10,583 INFO L432 NwaCegarLoop]: 154 mSDtfsCounter, 5 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:50:10,584 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 449 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:50:10,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2024-11-14 04:50:10,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 395. [2024-11-14 04:50:10,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 301 states have (on average 1.1461794019933556) internal successors, (345), 303 states have internal predecessors, (345), 62 states have call successors, (62), 31 states have call predecessors, (62), 31 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2024-11-14 04:50:10,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 469 transitions. [2024-11-14 04:50:10,695 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 469 transitions. Word has length 251 [2024-11-14 04:50:10,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:50:10,696 INFO L471 AbstractCegarLoop]: Abstraction has 395 states and 469 transitions. [2024-11-14 04:50:10,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2024-11-14 04:50:10,696 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 469 transitions. [2024-11-14 04:50:10,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2024-11-14 04:50:10,698 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:50:10,698 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 7, 7, 7, 7, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:50:10,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-14 04:50:10,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-14 04:50:10,899 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:50:10,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:50:10,900 INFO L85 PathProgramCache]: Analyzing trace with hash -782115309, now seen corresponding path program 1 times [2024-11-14 04:50:10,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:50:10,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560584256] [2024-11-14 04:50:10,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:50:10,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:50:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:50:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2024-11-14 04:50:11,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:50:11,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560584256] [2024-11-14 04:50:11,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560584256] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:50:11,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028456970] [2024-11-14 04:50:11,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:50:11,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:50:11,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:50:11,082 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:50:11,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-14 04:50:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:50:11,498 INFO L255 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 04:50:11,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:50:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 32 proven. 162 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-11-14 04:50:12,043 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:50:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 23 proven. 20 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2024-11-14 04:50:12,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028456970] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:50:12,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1706532822] [2024-11-14 04:50:12,492 INFO L159 IcfgInterpreter]: Started Sifa with 80 locations of interest [2024-11-14 04:50:12,492 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:50:12,493 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:50:12,493 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:50:12,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:50:21,182 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 10 for LOIs [2024-11-14 04:50:21,242 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:50:22,483 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 67 for LOIs [2024-11-14 04:50:22,512 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 43 for LOIs [2024-11-14 04:50:22,624 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 42 for LOIs [2024-11-14 04:50:22,646 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:50:40,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1706532822] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:50:40,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:50:40,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [5, 12, 13] total 80 [2024-11-14 04:50:40,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359039826] [2024-11-14 04:50:40,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:50:40,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-14 04:50:40,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:50:40,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-14 04:50:40,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=5908, Unknown=0, NotChecked=0, Total=6320 [2024-11-14 04:50:40,639 INFO L87 Difference]: Start difference. First operand 395 states and 469 transitions. Second operand has 64 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 47 states have internal predecessors, (68), 12 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 12 states have call successors, (15) [2024-11-14 04:50:58,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:50:58,340 INFO L93 Difference]: Finished difference Result 658 states and 823 transitions. [2024-11-14 04:50:58,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-11-14 04:50:58,341 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 47 states have internal predecessors, (68), 12 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 12 states have call successors, (15) Word has length 254 [2024-11-14 04:50:58,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:50:58,344 INFO L225 Difference]: With dead ends: 658 [2024-11-14 04:50:58,344 INFO L226 Difference]: Without dead ends: 488 [2024-11-14 04:50:58,346 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 795 GetRequests, 673 SyntacticMatches, 14 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3408 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=736, Invalid=11254, Unknown=0, NotChecked=0, Total=11990 [2024-11-14 04:50:58,347 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 128 mSDsluCounter, 1860 mSDsCounter, 0 mSdLazyCounter, 6234 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1943 SdHoareTripleChecker+Invalid, 6294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 6234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:50:58,350 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 1943 Invalid, 6294 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [60 Valid, 6234 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2024-11-14 04:50:58,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2024-11-14 04:50:58,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 469. [2024-11-14 04:50:58,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 352 states have (on average 1.1619318181818181) internal successors, (409), 355 states have internal predecessors, (409), 81 states have call successors, (81), 35 states have call predecessors, (81), 35 states have return successors, (81), 78 states have call predecessors, (81), 81 states have call successors, (81) [2024-11-14 04:50:58,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 571 transitions. [2024-11-14 04:50:58,485 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 571 transitions. Word has length 254 [2024-11-14 04:50:58,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:50:58,486 INFO L471 AbstractCegarLoop]: Abstraction has 469 states and 571 transitions. [2024-11-14 04:50:58,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 47 states have internal predecessors, (68), 12 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 12 states have call successors, (15) [2024-11-14 04:50:58,486 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 571 transitions. [2024-11-14 04:50:58,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2024-11-14 04:50:58,488 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:50:58,488 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 7, 7, 7, 7, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:50:58,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-14 04:50:58,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-14 04:50:58,689 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:50:58,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:50:58,690 INFO L85 PathProgramCache]: Analyzing trace with hash -422526394, now seen corresponding path program 1 times [2024-11-14 04:50:58,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:50:58,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390478445] [2024-11-14 04:50:58,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:50:58,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:50:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:50:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2024-11-14 04:50:58,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:50:58,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390478445] [2024-11-14 04:50:58,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390478445] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:50:58,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467149546] [2024-11-14 04:50:58,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:50:58,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:50:58,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:50:58,877 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:50:58,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-14 04:50:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:50:59,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 04:50:59,322 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:50:59,991 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 32 proven. 162 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-11-14 04:50:59,992 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:51:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 23 proven. 20 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2024-11-14 04:51:00,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467149546] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:51:00,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1001815880] [2024-11-14 04:51:00,432 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2024-11-14 04:51:00,433 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:51:00,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:51:00,433 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:51:00,433 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:51:08,575 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 10 for LOIs [2024-11-14 04:51:08,602 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:51:10,204 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 90 for LOIs [2024-11-14 04:51:10,263 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 72 for LOIs [2024-11-14 04:51:10,439 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 42 for LOIs [2024-11-14 04:51:10,460 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:51:29,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1001815880] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:51:29,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:51:29,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [5, 12, 13] total 81 [2024-11-14 04:51:29,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922973552] [2024-11-14 04:51:29,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:51:29,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-14 04:51:29,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:51:29,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-14 04:51:29,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=6046, Unknown=0, NotChecked=0, Total=6480 [2024-11-14 04:51:29,024 INFO L87 Difference]: Start difference. First operand 469 states and 571 transitions. Second operand has 65 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 48 states have internal predecessors, (70), 12 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 12 states have call successors, (15) [2024-11-14 04:51:43,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:51:43,128 INFO L93 Difference]: Finished difference Result 802 states and 1023 transitions. [2024-11-14 04:51:43,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-11-14 04:51:43,128 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 48 states have internal predecessors, (70), 12 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 12 states have call successors, (15) Word has length 255 [2024-11-14 04:51:43,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:51:43,131 INFO L225 Difference]: With dead ends: 802 [2024-11-14 04:51:43,131 INFO L226 Difference]: Without dead ends: 632 [2024-11-14 04:51:43,133 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 675 SyntacticMatches, 14 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3175 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=685, Invalid=10235, Unknown=0, NotChecked=0, Total=10920 [2024-11-14 04:51:43,133 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 116 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 5655 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 5700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 5655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:51:43,133 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 1351 Invalid, 5700 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [45 Valid, 5655 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2024-11-14 04:51:43,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2024-11-14 04:51:43,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 624. [2024-11-14 04:51:43,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 462 states have (on average 1.1926406926406927) internal successors, (551), 468 states have internal predecessors, (551), 117 states have call successors, (117), 44 states have call predecessors, (117), 44 states have return successors, (117), 111 states have call predecessors, (117), 117 states have call successors, (117) [2024-11-14 04:51:43,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 785 transitions. [2024-11-14 04:51:43,324 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 785 transitions. Word has length 255 [2024-11-14 04:51:43,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:51:43,325 INFO L471 AbstractCegarLoop]: Abstraction has 624 states and 785 transitions. [2024-11-14 04:51:43,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 48 states have internal predecessors, (70), 12 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 12 states have call successors, (15) [2024-11-14 04:51:43,325 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 785 transitions. [2024-11-14 04:51:43,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2024-11-14 04:51:43,327 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:51:43,328 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:51:43,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-14 04:51:43,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-14 04:51:43,528 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:51:43,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:51:43,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1220738580, now seen corresponding path program 1 times [2024-11-14 04:51:43,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:51:43,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746913076] [2024-11-14 04:51:43,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:51:43,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:51:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:51:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 584 trivial. 0 not checked. [2024-11-14 04:51:43,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:51:43,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746913076] [2024-11-14 04:51:43,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746913076] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:51:43,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956369687] [2024-11-14 04:51:43,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:51:43,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:51:43,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:51:43,684 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:51:43,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-14 04:51:44,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:51:44,099 INFO L255 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-14 04:51:44,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:51:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2024-11-14 04:51:44,893 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:51:44,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956369687] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:51:44,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:51:44,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [5] total 18 [2024-11-14 04:51:44,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208789870] [2024-11-14 04:51:44,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:51:44,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 04:51:44,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:51:44,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 04:51:44,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2024-11-14 04:51:44,895 INFO L87 Difference]: Start difference. First operand 624 states and 785 transitions. Second operand has 15 states, 14 states have (on average 6.214285714285714) internal successors, (87), 13 states have internal predecessors, (87), 4 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2024-11-14 04:51:46,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:51:46,323 INFO L93 Difference]: Finished difference Result 1254 states and 1648 transitions. [2024-11-14 04:51:46,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-14 04:51:46,324 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.214285714285714) internal successors, (87), 13 states have internal predecessors, (87), 4 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 260 [2024-11-14 04:51:46,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:51:46,330 INFO L225 Difference]: With dead ends: 1254 [2024-11-14 04:51:46,330 INFO L226 Difference]: Without dead ends: 1084 [2024-11-14 04:51:46,331 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2024-11-14 04:51:46,331 INFO L432 NwaCegarLoop]: 181 mSDtfsCounter, 183 mSDsluCounter, 2041 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 2222 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:51:46,331 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 2222 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 04:51:46,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2024-11-14 04:51:46,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 762. [2024-11-14 04:51:46,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 558 states have (on average 1.1971326164874552) internal successors, (668), 569 states have internal predecessors, (668), 147 states have call successors, (147), 57 states have call predecessors, (147), 56 states have return successors, (147), 135 states have call predecessors, (147), 147 states have call successors, (147) [2024-11-14 04:51:46,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 962 transitions. [2024-11-14 04:51:46,517 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 962 transitions. Word has length 260 [2024-11-14 04:51:46,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:51:46,517 INFO L471 AbstractCegarLoop]: Abstraction has 762 states and 962 transitions. [2024-11-14 04:51:46,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.214285714285714) internal successors, (87), 13 states have internal predecessors, (87), 4 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2024-11-14 04:51:46,518 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 962 transitions. [2024-11-14 04:51:46,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2024-11-14 04:51:46,521 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:51:46,521 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 9, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:51:46,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-14 04:51:46,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-14 04:51:46,722 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:51:46,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:51:46,722 INFO L85 PathProgramCache]: Analyzing trace with hash -777278994, now seen corresponding path program 1 times [2024-11-14 04:51:46,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:51:46,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488461147] [2024-11-14 04:51:46,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:51:46,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:51:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:51:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2024-11-14 04:51:46,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:51:46,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488461147] [2024-11-14 04:51:46,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488461147] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:51:46,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393798903] [2024-11-14 04:51:46,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:51:46,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:51:46,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:51:46,937 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:51:46,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-14 04:51:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:51:47,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 04:51:47,468 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:51:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2024-11-14 04:51:47,481 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:51:47,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393798903] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:51:47,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:51:47,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2024-11-14 04:51:47,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262933305] [2024-11-14 04:51:47,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:51:47,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:51:47,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:51:47,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:51:47,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:51:47,483 INFO L87 Difference]: Start difference. First operand 762 states and 962 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-14 04:51:47,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:51:47,819 INFO L93 Difference]: Finished difference Result 1428 states and 1816 transitions. [2024-11-14 04:51:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:51:47,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 268 [2024-11-14 04:51:47,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:51:47,825 INFO L225 Difference]: With dead ends: 1428 [2024-11-14 04:51:47,825 INFO L226 Difference]: Without dead ends: 762 [2024-11-14 04:51:47,827 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:51:47,831 INFO L432 NwaCegarLoop]: 157 mSDtfsCounter, 0 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:51:47,832 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 625 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:51:47,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2024-11-14 04:51:48,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 762. [2024-11-14 04:51:48,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 558 states have (on average 1.1917562724014337) internal successors, (665), 569 states have internal predecessors, (665), 147 states have call successors, (147), 57 states have call predecessors, (147), 56 states have return successors, (147), 135 states have call predecessors, (147), 147 states have call successors, (147) [2024-11-14 04:51:48,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 959 transitions. [2024-11-14 04:51:48,067 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 959 transitions. Word has length 268 [2024-11-14 04:51:48,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:51:48,067 INFO L471 AbstractCegarLoop]: Abstraction has 762 states and 959 transitions. [2024-11-14 04:51:48,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-14 04:51:48,067 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 959 transitions. [2024-11-14 04:51:48,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2024-11-14 04:51:48,070 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:51:48,071 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 9, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:51:48,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-14 04:51:48,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-14 04:51:48,275 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:51:48,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:51:48,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1943606587, now seen corresponding path program 1 times [2024-11-14 04:51:48,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:51:48,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950915799] [2024-11-14 04:51:48,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:51:48,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:51:48,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:51:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 57 proven. 77 refuted. 0 times theorem prover too weak. 734 trivial. 0 not checked. [2024-11-14 04:51:54,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:51:54,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950915799] [2024-11-14 04:51:54,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950915799] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:51:54,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113532525] [2024-11-14 04:51:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:51:54,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:51:54,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:51:54,995 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:51:54,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-14 04:51:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:51:55,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-14 04:51:55,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:51:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 289 proven. 155 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2024-11-14 04:51:56,938 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:51:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 52 proven. 200 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2024-11-14 04:51:59,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113532525] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:51:59,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [80601064] [2024-11-14 04:51:59,044 INFO L159 IcfgInterpreter]: Started Sifa with 89 locations of interest [2024-11-14 04:51:59,044 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:51:59,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:51:59,045 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:51:59,045 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:52:12,933 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 10 for LOIs [2024-11-14 04:52:12,958 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:52:14,579 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 133 for LOIs [2024-11-14 04:52:15,054 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 63 for LOIs [2024-11-14 04:52:15,155 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 61 for LOIs [2024-11-14 04:52:15,189 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:52:48,431 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '80678#(exists ((|v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_123| Int)) (and (= |v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_123| 0) (exists ((|v_ULTIMATE.start_check_#t~ret24#1_58| Int) (|v_ULTIMATE.start_check_~tmp___7~0#1_54| Int)) (and (= |v_ULTIMATE.start_check_~tmp___7~0#1_54| 0) (= |v_ULTIMATE.start_check_#t~ret24#1_58| 0))) (= |assert_#in~arg| 0) (= ~g2v~0 0) (<= ~nomsg~0 127) (<= ~votedValue_History_2~0 127) (<= 0 (+ ~votedValue_History_0~0 128)) (= ~nomsg~0 ~votedValue_History_0~0) (= ~g3v~0 0) (= ~g1v~0 0) (<= ~votedValue_History_1~0 127) (<= 0 (+ ~votedValue_History_2~0 128)) (exists ((|v_ULTIMATE.start_check_~tmp___10~0#1_77| Int)) (and (or (and (exists ((|v_ULTIMATE.start_check_#t~ret13#1_103| Int) (|v_ULTIMATE.start_check_~tmp___3~0#1_89| Int)) (and (<= |v_ULTIMATE.start_check_#t~ret13#1_103| 1) (= |v_ULTIMATE.start_check_~tmp___3~0#1_89| 1) (not (= |v_ULTIMATE.start_check_#t~ret13#1_103| 0)) (<= 0 |v_ULTIMATE.start_check_#t~ret13#1_103|))) (= |v_ULTIMATE.start_check_~tmp___10~0#1_77| ~votedValue_History_1~0)) (and (= |v_ULTIMATE.start_check_~tmp___10~0#1_77| ~votedValue_History_1~0) (exists ((|v_ULTIMATE.start_check_#t~ret14#1_62| Int) (|v_ULTIMATE.start_check_~tmp___4~0#1_56| Int)) (and (<= |v_ULTIMATE.start_check_#t~ret14#1_62| 1) (<= 0 |v_ULTIMATE.start_check_#t~ret14#1_62|) (not (= |v_ULTIMATE.start_check_#t~ret14#1_62| 0)) (= |v_ULTIMATE.start_check_~tmp___4~0#1_56| 1))) (exists ((|v_ULTIMATE.start_check_#t~ret13#1_103| Int) (|v_ULTIMATE.start_check_~tmp___3~0#1_88| Int)) (and (= |v_ULTIMATE.start_check_~tmp___3~0#1_88| 0) (= |v_ULTIMATE.start_check_#t~ret13#1_103| 0))))) (<= 0 (+ |v_ULTIMATE.start_check_~tmp___10~0#1_77| 1))))))' at error location [2024-11-14 04:52:48,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:52:48,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:52:48,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 16, 20] total 61 [2024-11-14 04:52:48,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093957247] [2024-11-14 04:52:48,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:52:48,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-14 04:52:48,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:52:48,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-14 04:52:48,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=706, Invalid=17116, Unknown=0, NotChecked=0, Total=17822 [2024-11-14 04:52:48,436 INFO L87 Difference]: Start difference. First operand 762 states and 959 transitions. Second operand has 61 states, 60 states have (on average 4.45) internal successors, (267), 52 states have internal predecessors, (267), 17 states have call successors, (63), 9 states have call predecessors, (63), 20 states have return successors, (65), 22 states have call predecessors, (65), 17 states have call successors, (65) [2024-11-14 04:53:08,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:53:08,350 INFO L93 Difference]: Finished difference Result 1572 states and 2031 transitions. [2024-11-14 04:53:08,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2024-11-14 04:53:08,350 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 4.45) internal successors, (267), 52 states have internal predecessors, (267), 17 states have call successors, (63), 9 states have call predecessors, (63), 20 states have return successors, (65), 22 states have call predecessors, (65), 17 states have call successors, (65) Word has length 298 [2024-11-14 04:53:08,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:53:08,355 INFO L225 Difference]: With dead ends: 1572 [2024-11-14 04:53:08,356 INFO L226 Difference]: Without dead ends: 1014 [2024-11-14 04:53:08,360 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1034 GetRequests, 791 SyntacticMatches, 16 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16572 ImplicationChecksByTransitivity, 45.4s TimeCoverageRelationStatistics Valid=2336, Invalid=49876, Unknown=0, NotChecked=0, Total=52212 [2024-11-14 04:53:08,360 INFO L432 NwaCegarLoop]: 217 mSDtfsCounter, 1448 mSDsluCounter, 6153 mSDsCounter, 0 mSdLazyCounter, 11572 mSolverCounterSat, 672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1448 SdHoareTripleChecker+Valid, 6370 SdHoareTripleChecker+Invalid, 12244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 672 IncrementalHoareTripleChecker+Valid, 11572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:53:08,361 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1448 Valid, 6370 Invalid, 12244 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [672 Valid, 11572 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2024-11-14 04:53:08,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2024-11-14 04:53:08,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 721. [2024-11-14 04:53:08,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 531 states have (on average 1.1619585687382297) internal successors, (617), 542 states have internal predecessors, (617), 132 states have call successors, (132), 58 states have call predecessors, (132), 57 states have return successors, (132), 120 states have call predecessors, (132), 132 states have call successors, (132) [2024-11-14 04:53:08,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 881 transitions. [2024-11-14 04:53:08,543 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 881 transitions. Word has length 298 [2024-11-14 04:53:08,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:53:08,544 INFO L471 AbstractCegarLoop]: Abstraction has 721 states and 881 transitions. [2024-11-14 04:53:08,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 4.45) internal successors, (267), 52 states have internal predecessors, (267), 17 states have call successors, (63), 9 states have call predecessors, (63), 20 states have return successors, (65), 22 states have call predecessors, (65), 17 states have call successors, (65) [2024-11-14 04:53:08,544 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 881 transitions. [2024-11-14 04:53:08,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2024-11-14 04:53:08,548 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:53:08,548 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 12, 12, 9, 8, 7, 7, 7, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:53:08,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-14 04:53:08,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:53:08,752 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:53:08,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:53:08,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2098902367, now seen corresponding path program 1 times [2024-11-14 04:53:08,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:53:08,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020938375] [2024-11-14 04:53:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:53:08,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:53:09,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:53:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 100 proven. 60 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2024-11-14 04:53:15,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:53:15,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020938375] [2024-11-14 04:53:15,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020938375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:53:15,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257113313] [2024-11-14 04:53:15,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:53:15,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:53:15,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:53:15,088 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:53:15,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc53a2d8-0b98-434b-83af-487dbe7df90c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-14 04:53:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:53:15,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-14 04:53:15,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:53:18,341 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 442 proven. 169 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2024-11-14 04:53:18,342 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:53:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 128 proven. 203 refuted. 0 times theorem prover too weak. 596 trivial. 0 not checked. [2024-11-14 04:53:21,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257113313] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:53:21,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [314341588] [2024-11-14 04:53:21,931 INFO L159 IcfgInterpreter]: Started Sifa with 92 locations of interest [2024-11-14 04:53:21,931 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:53:21,932 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:53:21,932 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:53:21,932 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:53:36,982 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 10 for LOIs [2024-11-14 04:53:37,006 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:53:38,300 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 150 for LOIs [2024-11-14 04:53:38,914 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 63 for LOIs [2024-11-14 04:53:39,023 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 61 for LOIs [2024-11-14 04:53:39,059 INFO L180 IcfgInterpreter]: Interpretation finished