./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.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_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/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_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/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_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/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 5c6d968f3bfd626cfd1fff51fa64657ab37ae457da61332877d0ea5ab7fc90f2 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 23:49:12,099 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 23:49:12,219 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-13 23:49:12,229 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 23:49:12,230 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 23:49:12,281 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 23:49:12,283 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 23:49:12,284 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 23:49:12,284 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 23:49:12,285 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 23:49:12,285 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-13 23:49:12,285 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-13 23:49:12,285 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-13 23:49:12,285 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-13 23:49:12,285 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-13 23:49:12,285 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-13 23:49:12,286 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-13 23:49:12,286 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-13 23:49:12,286 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-13 23:49:12,286 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-13 23:49:12,286 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-13 23:49:12,286 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-13 23:49:12,289 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 23:49:12,289 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 23:49:12,289 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 23:49:12,289 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 23:49:12,290 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 23:49:12,290 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 23:49:12,290 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 23:49:12,290 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 23:49:12,290 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 23:49:12,290 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 23:49:12,290 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 23:49:12,290 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 23:49:12,291 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 23:49:12,291 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 23:49:12,291 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 23:49:12,291 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 23:49:12,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:49:12,292 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 23:49:12,292 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 23:49:12,292 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 23:49:12,292 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-13 23:49:12,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 23:49:12,292 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 23:49:12,292 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-13 23:49:12,292 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 23:49:12,293 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_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/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 -> 5c6d968f3bfd626cfd1fff51fa64657ab37ae457da61332877d0ea5ab7fc90f2 [2024-11-13 23:49:12,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 23:49:12,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 23:49:12,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 23:49:12,640 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 23:49:12,640 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 23:49:12,642 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c Unable to find full path for "g++" [2024-11-13 23:49:14,677 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 23:49:15,086 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 23:49:15,086 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c [2024-11-13 23:49:15,108 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/data/18f490e9b/d34cca1e889c480598a4515896e38e5a/FLAG1b9d2ab75 [2024-11-13 23:49:15,135 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/data/18f490e9b/d34cca1e889c480598a4515896e38e5a [2024-11-13 23:49:15,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 23:49:15,145 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 23:49:15,148 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 23:49:15,148 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 23:49:15,153 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 23:49:15,154 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:49:15" (1/1) ... [2024-11-13 23:49:15,155 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@380b6b93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:15, skipping insertion in model container [2024-11-13 23:49:15,156 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:49:15" (1/1) ... [2024-11-13 23:49:15,209 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 23:49:15,578 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_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c[14698,14711] [2024-11-13 23:49:15,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:49:15,596 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 23:49:15,677 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_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c[14698,14711] [2024-11-13 23:49:15,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:49:15,696 INFO L204 MainTranslator]: Completed translation [2024-11-13 23:49:15,697 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:15 WrapperNode [2024-11-13 23:49:15,697 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 23:49:15,698 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 23:49:15,698 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 23:49:15,698 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 23:49:15,711 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:15" (1/1) ... [2024-11-13 23:49:15,726 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:15" (1/1) ... [2024-11-13 23:49:15,769 INFO L138 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 509 [2024-11-13 23:49:15,769 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 23:49:15,770 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 23:49:15,770 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 23:49:15,770 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 23:49:15,778 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:15" (1/1) ... [2024-11-13 23:49:15,778 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:15" (1/1) ... [2024-11-13 23:49:15,783 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:15" (1/1) ... [2024-11-13 23:49:15,783 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:15" (1/1) ... [2024-11-13 23:49:15,795 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:15" (1/1) ... [2024-11-13 23:49:15,802 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:15" (1/1) ... [2024-11-13 23:49:15,806 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:15" (1/1) ... [2024-11-13 23:49:15,808 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:15" (1/1) ... [2024-11-13 23:49:15,813 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 23:49:15,814 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 23:49:15,814 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 23:49:15,814 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 23:49:15,815 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:15" (1/1) ... [2024-11-13 23:49:15,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:49:15,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:49:15,861 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-13 23:49:15,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-13 23:49:15,904 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2024-11-13 23:49:15,905 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2024-11-13 23:49:15,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 23:49:15,905 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2024-11-13 23:49:15,905 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2024-11-13 23:49:15,906 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2024-11-13 23:49:15,906 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2024-11-13 23:49:15,906 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2024-11-13 23:49:15,906 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2024-11-13 23:49:15,906 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-13 23:49:15,906 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-13 23:49:15,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-13 23:49:15,906 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2024-11-13 23:49:15,906 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2024-11-13 23:49:15,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 23:49:15,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 23:49:15,907 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2024-11-13 23:49:15,907 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2024-11-13 23:49:16,065 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 23:49:16,068 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 23:49:16,883 INFO L? ?]: Removed 114 outVars from TransFormulas that were not future-live. [2024-11-13 23:49:16,883 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 23:49:17,155 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 23:49:17,155 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-13 23:49:17,160 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:49:17 BoogieIcfgContainer [2024-11-13 23:49:17,160 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 23:49:17,164 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 23:49:17,164 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 23:49:17,169 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 23:49:17,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 11:49:15" (1/3) ... [2024-11-13 23:49:17,170 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21f58dfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:49:17, skipping insertion in model container [2024-11-13 23:49:17,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:15" (2/3) ... [2024-11-13 23:49:17,171 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21f58dfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:49:17, skipping insertion in model container [2024-11-13 23:49:17,171 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:49:17" (3/3) ... [2024-11-13 23:49:17,173 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c [2024-11-13 23:49:17,194 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 23:49:17,196 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c that has 8 procedures, 150 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-13 23:49:17,283 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 23:49:17,304 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;@7762155f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 23:49:17,304 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 23:49:17,312 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 110 states have (on average 1.5363636363636364) internal successors, (169), 111 states have internal predecessors, (169), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-11-13 23:49:17,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-13 23:49:17,324 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:17,324 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:17,326 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:17,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:17,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1444549694, now seen corresponding path program 1 times [2024-11-13 23:49:17,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:17,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393378767] [2024-11-13 23:49:17,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:17,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:18,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:18,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393378767] [2024-11-13 23:49:18,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393378767] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:18,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:18,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 23:49:18,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135955585] [2024-11-13 23:49:18,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:18,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:49:18,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:18,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:49:18,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:49:18,193 INFO L87 Difference]: Start difference. First operand has 150 states, 110 states have (on average 1.5363636363636364) internal successors, (169), 111 states have internal predecessors, (169), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:49:18,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:18,409 INFO L93 Difference]: Finished difference Result 301 states and 489 transitions. [2024-11-13 23:49:18,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:49:18,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 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 [2024-11-13 23:49:18,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:18,427 INFO L225 Difference]: With dead ends: 301 [2024-11-13 23:49:18,427 INFO L226 Difference]: Without dead ends: 153 [2024-11-13 23:49:18,434 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:49:18,440 INFO L432 NwaCegarLoop]: 216 mSDtfsCounter, 3 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:18,443 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 638 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:18,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-11-13 23:49:18,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2024-11-13 23:49:18,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 113 states have (on average 1.5044247787610618) internal successors, (170), 113 states have internal predecessors, (170), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-11-13 23:49:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 232 transitions. [2024-11-13 23:49:18,516 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 232 transitions. Word has length 19 [2024-11-13 23:49:18,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:18,517 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 232 transitions. [2024-11-13 23:49:18,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:49:18,517 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 232 transitions. [2024-11-13 23:49:18,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-13 23:49:18,519 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:18,519 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:18,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 23:49:18,520 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:18,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:18,520 INFO L85 PathProgramCache]: Analyzing trace with hash -933848562, now seen corresponding path program 1 times [2024-11-13 23:49:18,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:18,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452689498] [2024-11-13 23:49:18,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:18,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:18,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:49:18,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:18,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452689498] [2024-11-13 23:49:18,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452689498] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:18,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:18,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 23:49:18,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157204587] [2024-11-13 23:49:18,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:18,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 23:49:18,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:18,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 23:49:18,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:49:18,829 INFO L87 Difference]: Start difference. First operand 153 states and 232 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:49:19,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:19,162 INFO L93 Difference]: Finished difference Result 339 states and 514 transitions. [2024-11-13 23:49:19,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 23:49:19,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2024-11-13 23:49:19,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:19,165 INFO L225 Difference]: With dead ends: 339 [2024-11-13 23:49:19,165 INFO L226 Difference]: Without dead ends: 189 [2024-11-13 23:49:19,166 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-13 23:49:19,170 INFO L432 NwaCegarLoop]: 194 mSDtfsCounter, 325 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:19,171 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 575 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:49:19,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-11-13 23:49:19,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2024-11-13 23:49:19,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 142 states have (on average 1.5070422535211268) internal successors, (214), 142 states have internal predecessors, (214), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-13 23:49:19,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 282 transitions. [2024-11-13 23:49:19,218 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 282 transitions. Word has length 30 [2024-11-13 23:49:19,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:19,219 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 282 transitions. [2024-11-13 23:49:19,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:49:19,219 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 282 transitions. [2024-11-13 23:49:19,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 23:49:19,221 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:19,222 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:19,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 23:49:19,222 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:19,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:19,223 INFO L85 PathProgramCache]: Analyzing trace with hash 666509892, now seen corresponding path program 1 times [2024-11-13 23:49:19,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:19,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262922465] [2024-11-13 23:49:19,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:19,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:19,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:49:19,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:19,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262922465] [2024-11-13 23:49:19,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262922465] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:19,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:19,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 23:49:19,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352457829] [2024-11-13 23:49:19,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:19,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 23:49:19,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:19,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 23:49:19,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:49:19,537 INFO L87 Difference]: Start difference. First operand 187 states and 282 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:49:19,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:19,810 INFO L93 Difference]: Finished difference Result 338 states and 511 transitions. [2024-11-13 23:49:19,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 23:49:19,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2024-11-13 23:49:19,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:19,814 INFO L225 Difference]: With dead ends: 338 [2024-11-13 23:49:19,816 INFO L226 Difference]: Without dead ends: 188 [2024-11-13 23:49:19,817 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-13 23:49:19,818 INFO L432 NwaCegarLoop]: 195 mSDtfsCounter, 320 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:19,820 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 578 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:49:19,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-11-13 23:49:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2024-11-13 23:49:19,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 142 states have (on average 1.5) internal successors, (213), 142 states have internal predecessors, (213), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-13 23:49:19,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 281 transitions. [2024-11-13 23:49:19,856 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 281 transitions. Word has length 31 [2024-11-13 23:49:19,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:19,856 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 281 transitions. [2024-11-13 23:49:19,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:49:19,856 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 281 transitions. [2024-11-13 23:49:19,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-13 23:49:19,857 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:19,857 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:19,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 23:49:19,858 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:19,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:19,858 INFO L85 PathProgramCache]: Analyzing trace with hash 413829262, now seen corresponding path program 1 times [2024-11-13 23:49:19,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:19,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395012342] [2024-11-13 23:49:19,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:19,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:49:20,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:20,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395012342] [2024-11-13 23:49:20,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395012342] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:20,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:20,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 23:49:20,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358854337] [2024-11-13 23:49:20,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:20,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:49:20,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:20,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:49:20,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:49:20,228 INFO L87 Difference]: Start difference. First operand 187 states and 281 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 23:49:20,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:20,342 INFO L93 Difference]: Finished difference Result 342 states and 516 transitions. [2024-11-13 23:49:20,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:49:20,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2024-11-13 23:49:20,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:20,345 INFO L225 Difference]: With dead ends: 342 [2024-11-13 23:49:20,345 INFO L226 Difference]: Without dead ends: 192 [2024-11-13 23:49:20,346 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:49:20,350 INFO L432 NwaCegarLoop]: 218 mSDtfsCounter, 4 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:20,351 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 650 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:20,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-13 23:49:20,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2024-11-13 23:49:20,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 146 states have (on average 1.4863013698630136) internal successors, (217), 146 states have internal predecessors, (217), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-13 23:49:20,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 285 transitions. [2024-11-13 23:49:20,391 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 285 transitions. Word has length 33 [2024-11-13 23:49:20,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:20,392 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 285 transitions. [2024-11-13 23:49:20,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 23:49:20,393 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 285 transitions. [2024-11-13 23:49:20,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-13 23:49:20,396 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:20,397 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:20,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 23:49:20,397 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:20,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:20,398 INFO L85 PathProgramCache]: Analyzing trace with hash -95561516, now seen corresponding path program 1 times [2024-11-13 23:49:20,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:20,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490659625] [2024-11-13 23:49:20,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:20,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:49:20,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:20,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490659625] [2024-11-13 23:49:20,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490659625] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:20,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:20,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 23:49:20,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698540517] [2024-11-13 23:49:20,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:20,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:49:20,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:20,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:49:20,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:49:20,723 INFO L87 Difference]: Start difference. First operand 192 states and 285 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 23:49:20,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:20,860 INFO L93 Difference]: Finished difference Result 352 states and 527 transitions. [2024-11-13 23:49:20,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:49:20,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2024-11-13 23:49:20,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:20,862 INFO L225 Difference]: With dead ends: 352 [2024-11-13 23:49:20,862 INFO L226 Difference]: Without dead ends: 197 [2024-11-13 23:49:20,863 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:49:20,866 INFO L432 NwaCegarLoop]: 215 mSDtfsCounter, 4 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:20,867 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 636 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:20,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-13 23:49:20,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2024-11-13 23:49:20,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 150 states have (on average 1.4733333333333334) internal successors, (221), 150 states have internal predecessors, (221), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-13 23:49:20,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2024-11-13 23:49:20,900 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 41 [2024-11-13 23:49:20,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:20,900 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2024-11-13 23:49:20,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 23:49:20,900 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2024-11-13 23:49:20,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 23:49:20,902 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:20,902 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:20,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 23:49:20,902 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:20,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:20,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1029949886, now seen corresponding path program 1 times [2024-11-13 23:49:20,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:20,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394735707] [2024-11-13 23:49:20,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:20,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:49:21,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:21,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394735707] [2024-11-13 23:49:21,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394735707] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:21,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:21,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 23:49:21,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367650653] [2024-11-13 23:49:21,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:21,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:49:21,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:21,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:49:21,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:49:21,217 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-13 23:49:21,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:21,341 INFO L93 Difference]: Finished difference Result 361 states and 531 transitions. [2024-11-13 23:49:21,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:49:21,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2024-11-13 23:49:21,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:21,345 INFO L225 Difference]: With dead ends: 361 [2024-11-13 23:49:21,345 INFO L226 Difference]: Without dead ends: 201 [2024-11-13 23:49:21,346 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:49:21,348 INFO L432 NwaCegarLoop]: 220 mSDtfsCounter, 3 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:21,348 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 646 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:21,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-11-13 23:49:21,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2024-11-13 23:49:21,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 153 states have (on average 1.4640522875816993) internal successors, (224), 153 states have internal predecessors, (224), 34 states have call successors, (34), 13 states have call predecessors, (34), 13 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-13 23:49:21,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 292 transitions. [2024-11-13 23:49:21,377 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 292 transitions. Word has length 49 [2024-11-13 23:49:21,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:21,378 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 292 transitions. [2024-11-13 23:49:21,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-13 23:49:21,378 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 292 transitions. [2024-11-13 23:49:21,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 23:49:21,382 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:21,383 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:21,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 23:49:21,383 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:21,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:21,383 INFO L85 PathProgramCache]: Analyzing trace with hash -868558107, now seen corresponding path program 1 times [2024-11-13 23:49:21,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:21,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397422777] [2024-11-13 23:49:21,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:21,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:49:21,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:21,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397422777] [2024-11-13 23:49:21,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397422777] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:21,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:21,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 23:49:21,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221695280] [2024-11-13 23:49:21,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:21,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:49:21,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:21,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:49:21,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:49:21,690 INFO L87 Difference]: Start difference. First operand 201 states and 292 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-13 23:49:21,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:21,839 INFO L93 Difference]: Finished difference Result 370 states and 541 transitions. [2024-11-13 23:49:21,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:49:21,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2024-11-13 23:49:21,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:21,842 INFO L225 Difference]: With dead ends: 370 [2024-11-13 23:49:21,842 INFO L226 Difference]: Without dead ends: 206 [2024-11-13 23:49:21,847 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:49:21,847 INFO L432 NwaCegarLoop]: 215 mSDtfsCounter, 4 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:21,848 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 636 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:21,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-13 23:49:21,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2024-11-13 23:49:21,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 157 states have (on average 1.4522292993630572) internal successors, (228), 157 states have internal predecessors, (228), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-13 23:49:21,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 296 transitions. [2024-11-13 23:49:21,878 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 296 transitions. Word has length 49 [2024-11-13 23:49:21,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:21,878 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 296 transitions. [2024-11-13 23:49:21,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-13 23:49:21,879 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 296 transitions. [2024-11-13 23:49:21,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-13 23:49:21,880 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:21,880 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 23:49:21,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 23:49:21,882 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:21,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:21,883 INFO L85 PathProgramCache]: Analyzing trace with hash -274681243, now seen corresponding path program 1 times [2024-11-13 23:49:21,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:21,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74832282] [2024-11-13 23:49:21,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:21,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:22,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 23:49:22,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:22,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74832282] [2024-11-13 23:49:22,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74832282] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:22,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:22,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 23:49:22,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980541578] [2024-11-13 23:49:22,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:22,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:49:22,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:22,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:49:22,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:49:22,221 INFO L87 Difference]: Start difference. First operand 206 states and 296 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 23:49:22,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:22,344 INFO L93 Difference]: Finished difference Result 381 states and 548 transitions. [2024-11-13 23:49:22,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:49:22,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 57 [2024-11-13 23:49:22,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:22,347 INFO L225 Difference]: With dead ends: 381 [2024-11-13 23:49:22,347 INFO L226 Difference]: Without dead ends: 212 [2024-11-13 23:49:22,348 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:49:22,352 INFO L432 NwaCegarLoop]: 219 mSDtfsCounter, 5 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:22,352 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 648 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:22,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-11-13 23:49:22,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2024-11-13 23:49:22,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 162 states have (on average 1.4382716049382716) internal successors, (233), 162 states have internal predecessors, (233), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-13 23:49:22,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 301 transitions. [2024-11-13 23:49:22,380 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 301 transitions. Word has length 57 [2024-11-13 23:49:22,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:22,382 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 301 transitions. [2024-11-13 23:49:22,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 23:49:22,383 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 301 transitions. [2024-11-13 23:49:22,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-13 23:49:22,384 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:22,384 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:22,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 23:49:22,386 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:22,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:22,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1672917955, now seen corresponding path program 1 times [2024-11-13 23:49:22,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:22,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302975194] [2024-11-13 23:49:22,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:22,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 23:49:23,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:23,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302975194] [2024-11-13 23:49:23,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302975194] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:49:23,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103913926] [2024-11-13 23:49:23,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:23,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:23,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:49:23,411 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:49:23,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 23:49:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:23,648 INFO L255 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 23:49:23,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:49:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:49:23,889 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 23:49:23,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103913926] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:23,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 23:49:23,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2024-11-13 23:49:23,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424235079] [2024-11-13 23:49:23,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:23,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 23:49:23,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:23,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 23:49:23,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-13 23:49:23,892 INFO L87 Difference]: Start difference. First operand 212 states and 301 transitions. Second operand has 6 states, 4 states have (on average 11.25) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-13 23:49:24,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:24,267 INFO L93 Difference]: Finished difference Result 601 states and 839 transitions. [2024-11-13 23:49:24,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 23:49:24,268 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 11.25) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 60 [2024-11-13 23:49:24,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:24,272 INFO L225 Difference]: With dead ends: 601 [2024-11-13 23:49:24,272 INFO L226 Difference]: Without dead ends: 400 [2024-11-13 23:49:24,274 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-13 23:49:24,277 INFO L432 NwaCegarLoop]: 220 mSDtfsCounter, 217 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:24,279 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 1016 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 23:49:24,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2024-11-13 23:49:24,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 396. [2024-11-13 23:49:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 300 states have (on average 1.42) internal successors, (426), 301 states have internal predecessors, (426), 65 states have call successors, (65), 30 states have call predecessors, (65), 30 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2024-11-13 23:49:24,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 556 transitions. [2024-11-13 23:49:24,349 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 556 transitions. Word has length 60 [2024-11-13 23:49:24,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:24,349 INFO L471 AbstractCegarLoop]: Abstraction has 396 states and 556 transitions. [2024-11-13 23:49:24,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 11.25) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-13 23:49:24,350 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 556 transitions. [2024-11-13 23:49:24,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-13 23:49:24,353 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:24,353 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:24,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-13 23:49:24,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:24,556 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:24,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:24,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1913291170, now seen corresponding path program 1 times [2024-11-13 23:49:24,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:24,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551040007] [2024-11-13 23:49:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:24,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 23:49:25,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:25,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551040007] [2024-11-13 23:49:25,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551040007] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:49:25,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246486239] [2024-11-13 23:49:25,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:25,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:25,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:49:25,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:49:25,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 23:49:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:25,672 INFO L255 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 23:49:25,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:49:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:26,242 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:49:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 23:49:26,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246486239] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:49:26,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [252136326] [2024-11-13 23:49:26,499 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2024-11-13 23:49:26,500 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:49:26,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:49:26,509 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:49:26,509 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:49:41,230 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 16 for LOIs [2024-11-13 23:49:41,237 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2024-11-13 23:49:41,239 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 80 for LOIs [2024-11-13 23:49:41,600 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 131 for LOIs [2024-11-13 23:49:43,219 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 106 for LOIs [2024-11-13 23:49:43,924 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 68 for LOIs [2024-11-13 23:49:44,060 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:50:09,754 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7762#(and (<= 0 ~side2Failed_History_0~0) (= |assert_#in~arg| 0) (exists ((|v_ULTIMATE.start_check_#t~ret16#1_15| Int) (|v_ULTIMATE.start_check_~tmp___8~0#1_14| Int)) (and (= |v_ULTIMATE.start_check_#t~ret16#1_15| 0) (exists ((|v_ULTIMATE.start_check_#t~ret15#1_15| Int) (|v_ULTIMATE.start_check_~tmp___7~0#1_14| Int)) (and (not (= |v_ULTIMATE.start_check_#t~ret15#1_15| 0)) (<= |v_ULTIMATE.start_check_#t~ret15#1_15| 1) (<= 0 |v_ULTIMATE.start_check_#t~ret15#1_15|) (exists ((|v_ULTIMATE.start_check_~tmp___0~0#1_15| Int)) (and (<= |v_ULTIMATE.start_check_~tmp___0~0#1_15| 127) (or (and (= ~s1p_new~0 ~nomsg~0) (= ~manual_selection_History_1~0 |v_ULTIMATE.start_check_~tmp___0~0#1_15|) (exists ((|v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side1~2#1_23| Int) (|v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side2~2#1_23| Int)) (and (not (= |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side1~2#1_23| 0)) (or (and (= ~active_side_History_0~0 0) (not (= 0 |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side2~2#1_23|))) (and (= ~active_side_History_0~0 0) (not (= ~nomsg~0 |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side1~2#1_23|)))) (not (= 1 |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side2~2#1_23|)) (not (= |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side1~2#1_23| 1)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= ~nomsg~0 ~s2p_new~0) (= ~nomsg~0 ~cs1_new~0) (= ~nomsg~0 ~s2s2_new~0) (= (mod ~side1Failed~0 256) 0) (= ~nomsg~0 ~cs2_new~0) (= ~nomsg~0 ~s1s2_new~0)) (and (= ~s1p_new~0 ~nomsg~0) (not (= (mod ~side1Failed~0 256) 0)) (= ~manual_selection_History_1~0 |v_ULTIMATE.start_check_~tmp___0~0#1_15|) (exists ((|v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side1~2#1_23| Int) (|v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side2~2#1_23| Int)) (and (not (= |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side1~2#1_23| 0)) (or (and (= ~active_side_History_0~0 0) (not (= 0 |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side2~2#1_23|))) (and (= ~active_side_History_0~0 0) (not (= ~nomsg~0 |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side1~2#1_23|)))) (not (= 1 |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side2~2#1_23|)) (not (= |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side1~2#1_23| 1)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (= ~nomsg~0 ~cs1_new~0) (= ~nomsg~0 ~s2s2_new~0) (= ~nomsg~0 ~cs2_new~0) (= ~nomsg~0 ~s1s2_new~0))) (<= 0 (+ 128 |v_ULTIMATE.start_check_~tmp___0~0#1_15|)) (not (= |v_ULTIMATE.start_check_~tmp___0~0#1_15| 0)))) (= |v_ULTIMATE.start_check_~tmp___7~0#1_14| 1) (not (= (mod ~side1Failed_History_1~0 256) 0)))) (= ~side2Failed_History_1~0 0) (= |v_ULTIMATE.start_check_~tmp___8~0#1_14| 0))) (<= ~side2Failed_History_0~0 1) (<= 0 ~side2Failed_History_2~0) (= ~side2_written~0 0) (<= ~side2Failed_History_2~0 1))' at error location [2024-11-13 23:50:09,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:50:09,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:50:09,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2024-11-13 23:50:09,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183226680] [2024-11-13 23:50:09,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:50:09,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 23:50:09,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:09,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 23:50:09,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=3440, Unknown=2, NotChecked=0, Total=3782 [2024-11-13 23:50:09,763 INFO L87 Difference]: Start difference. First operand 396 states and 556 transitions. Second operand has 18 states, 13 states have (on average 6.769230769230769) internal successors, (88), 16 states have internal predecessors, (88), 6 states have call successors, (20), 3 states have call predecessors, (20), 8 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2024-11-13 23:50:10,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:10,562 INFO L93 Difference]: Finished difference Result 1014 states and 1405 transitions. [2024-11-13 23:50:10,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 23:50:10,562 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 6.769230769230769) internal successors, (88), 16 states have internal predecessors, (88), 6 states have call successors, (20), 3 states have call predecessors, (20), 8 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 62 [2024-11-13 23:50:10,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:10,569 INFO L225 Difference]: With dead ends: 1014 [2024-11-13 23:50:10,569 INFO L226 Difference]: Without dead ends: 678 [2024-11-13 23:50:10,572 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=404, Invalid=4706, Unknown=2, NotChecked=0, Total=5112 [2024-11-13 23:50:10,573 INFO L432 NwaCegarLoop]: 288 mSDtfsCounter, 263 mSDsluCounter, 3294 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 3582 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:10,576 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 3582 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 23:50:10,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2024-11-13 23:50:10,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 515. [2024-11-13 23:50:10,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 385 states have (on average 1.412987012987013) internal successors, (544), 388 states have internal predecessors, (544), 88 states have call successors, (88), 41 states have call predecessors, (88), 41 states have return successors, (88), 85 states have call predecessors, (88), 88 states have call successors, (88) [2024-11-13 23:50:10,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 720 transitions. [2024-11-13 23:50:10,625 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 720 transitions. Word has length 62 [2024-11-13 23:50:10,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:10,625 INFO L471 AbstractCegarLoop]: Abstraction has 515 states and 720 transitions. [2024-11-13 23:50:10,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 6.769230769230769) internal successors, (88), 16 states have internal predecessors, (88), 6 states have call successors, (20), 3 states have call predecessors, (20), 8 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2024-11-13 23:50:10,626 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 720 transitions. [2024-11-13 23:50:10,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-13 23:50:10,627 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:10,627 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:50:10,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 23:50:10,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 23:50:10,831 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:50:10,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:10,832 INFO L85 PathProgramCache]: Analyzing trace with hash 896996213, now seen corresponding path program 1 times [2024-11-13 23:50:10,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:10,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005454813] [2024-11-13 23:50:10,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:10,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 23:50:11,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:11,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005454813] [2024-11-13 23:50:11,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005454813] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:50:11,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:50:11,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 23:50:11,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154541613] [2024-11-13 23:50:11,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:50:11,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:50:11,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:11,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:50:11,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:50:11,034 INFO L87 Difference]: Start difference. First operand 515 states and 720 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-13 23:50:11,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:11,134 INFO L93 Difference]: Finished difference Result 971 states and 1357 transitions. [2024-11-13 23:50:11,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:50:11,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 66 [2024-11-13 23:50:11,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:11,139 INFO L225 Difference]: With dead ends: 971 [2024-11-13 23:50:11,139 INFO L226 Difference]: Without dead ends: 527 [2024-11-13 23:50:11,141 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:50:11,142 INFO L432 NwaCegarLoop]: 220 mSDtfsCounter, 3 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:11,142 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 646 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:50:11,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2024-11-13 23:50:11,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 527. [2024-11-13 23:50:11,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 394 states have (on average 1.4035532994923858) internal successors, (553), 397 states have internal predecessors, (553), 88 states have call successors, (88), 44 states have call predecessors, (88), 44 states have return successors, (88), 85 states have call predecessors, (88), 88 states have call successors, (88) [2024-11-13 23:50:11,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 729 transitions. [2024-11-13 23:50:11,189 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 729 transitions. Word has length 66 [2024-11-13 23:50:11,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:11,190 INFO L471 AbstractCegarLoop]: Abstraction has 527 states and 729 transitions. [2024-11-13 23:50:11,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-13 23:50:11,190 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 729 transitions. [2024-11-13 23:50:11,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-13 23:50:11,191 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:11,191 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:50:11,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-13 23:50:11,191 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:50:11,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:11,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1401464673, now seen corresponding path program 1 times [2024-11-13 23:50:11,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:11,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668578736] [2024-11-13 23:50:11,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:11,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 23:50:11,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:11,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668578736] [2024-11-13 23:50:11,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668578736] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:50:11,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:50:11,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-13 23:50:11,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431252431] [2024-11-13 23:50:11,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:50:11,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 23:50:11,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:11,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 23:50:11,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-13 23:50:11,832 INFO L87 Difference]: Start difference. First operand 527 states and 729 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-13 23:50:12,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:12,382 INFO L93 Difference]: Finished difference Result 1120 states and 1521 transitions. [2024-11-13 23:50:12,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 23:50:12,383 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 71 [2024-11-13 23:50:12,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:12,387 INFO L225 Difference]: With dead ends: 1120 [2024-11-13 23:50:12,388 INFO L226 Difference]: Without dead ends: 660 [2024-11-13 23:50:12,390 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-13 23:50:12,391 INFO L432 NwaCegarLoop]: 232 mSDtfsCounter, 495 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:12,391 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 1176 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 23:50:12,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2024-11-13 23:50:12,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 648. [2024-11-13 23:50:12,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 480 states have (on average 1.3625) internal successors, (654), 483 states have internal predecessors, (654), 109 states have call successors, (109), 58 states have call predecessors, (109), 58 states have return successors, (109), 106 states have call predecessors, (109), 109 states have call successors, (109) [2024-11-13 23:50:12,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 872 transitions. [2024-11-13 23:50:12,459 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 872 transitions. Word has length 71 [2024-11-13 23:50:12,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:12,460 INFO L471 AbstractCegarLoop]: Abstraction has 648 states and 872 transitions. [2024-11-13 23:50:12,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-13 23:50:12,460 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 872 transitions. [2024-11-13 23:50:12,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-13 23:50:12,463 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:12,463 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:50:12,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-13 23:50:12,463 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:50:12,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:12,464 INFO L85 PathProgramCache]: Analyzing trace with hash -722680063, now seen corresponding path program 1 times [2024-11-13 23:50:12,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:12,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375546841] [2024-11-13 23:50:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:12,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 23:50:12,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:12,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375546841] [2024-11-13 23:50:12,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375546841] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:50:12,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:50:12,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 23:50:12,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657683439] [2024-11-13 23:50:12,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:50:12,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:50:12,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:12,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:50:12,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:50:12,574 INFO L87 Difference]: Start difference. First operand 648 states and 872 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-13 23:50:12,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:12,770 INFO L93 Difference]: Finished difference Result 1579 states and 2125 transitions. [2024-11-13 23:50:12,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 23:50:12,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2024-11-13 23:50:12,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:12,778 INFO L225 Difference]: With dead ends: 1579 [2024-11-13 23:50:12,778 INFO L226 Difference]: Without dead ends: 1142 [2024-11-13 23:50:12,779 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 [2024-11-13 23:50:12,781 INFO L432 NwaCegarLoop]: 379 mSDtfsCounter, 188 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:12,781 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 956 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:50:12,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2024-11-13 23:50:12,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 1057. [2024-11-13 23:50:12,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 782 states have (on average 1.3516624040920715) internal successors, (1057), 788 states have internal predecessors, (1057), 178 states have call successors, (178), 96 states have call predecessors, (178), 96 states have return successors, (178), 172 states have call predecessors, (178), 178 states have call successors, (178) [2024-11-13 23:50:12,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1413 transitions. [2024-11-13 23:50:12,893 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1413 transitions. Word has length 71 [2024-11-13 23:50:12,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:12,894 INFO L471 AbstractCegarLoop]: Abstraction has 1057 states and 1413 transitions. [2024-11-13 23:50:12,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-13 23:50:12,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1413 transitions. [2024-11-13 23:50:12,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-13 23:50:12,897 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:12,897 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 23:50:12,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-13 23:50:12,897 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:50:12,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:12,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1174449427, now seen corresponding path program 1 times [2024-11-13 23:50:12,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:12,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980441234] [2024-11-13 23:50:12,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:12,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-13 23:50:13,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:13,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980441234] [2024-11-13 23:50:13,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980441234] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:50:13,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:50:13,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 23:50:13,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465128935] [2024-11-13 23:50:13,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:50:13,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 23:50:13,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:13,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 23:50:13,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 23:50:13,199 INFO L87 Difference]: Start difference. First operand 1057 states and 1413 transitions. Second operand has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-13 23:50:13,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:13,445 INFO L93 Difference]: Finished difference Result 1409 states and 1964 transitions. [2024-11-13 23:50:13,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 23:50:13,445 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 73 [2024-11-13 23:50:13,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:13,457 INFO L225 Difference]: With dead ends: 1409 [2024-11-13 23:50:13,457 INFO L226 Difference]: Without dead ends: 1407 [2024-11-13 23:50:13,458 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-13 23:50:13,458 INFO L432 NwaCegarLoop]: 392 mSDtfsCounter, 124 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1785 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:13,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 1785 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:50:13,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2024-11-13 23:50:13,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1064. [2024-11-13 23:50:13,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 785 states have (on average 1.3503184713375795) internal successors, (1060), 793 states have internal predecessors, (1060), 180 states have call successors, (180), 98 states have call predecessors, (180), 98 states have return successors, (180), 172 states have call predecessors, (180), 180 states have call successors, (180) [2024-11-13 23:50:13,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1420 transitions. [2024-11-13 23:50:13,597 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1420 transitions. Word has length 73 [2024-11-13 23:50:13,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:13,597 INFO L471 AbstractCegarLoop]: Abstraction has 1064 states and 1420 transitions. [2024-11-13 23:50:13,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-13 23:50:13,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1420 transitions. [2024-11-13 23:50:13,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-13 23:50:13,601 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:13,601 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:50:13,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-13 23:50:13,601 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:50:13,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:13,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1910101910, now seen corresponding path program 1 times [2024-11-13 23:50:13,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:13,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510583272] [2024-11-13 23:50:13,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:13,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 23:50:14,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:14,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510583272] [2024-11-13 23:50:14,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510583272] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:50:14,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:50:14,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-13 23:50:14,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519255416] [2024-11-13 23:50:14,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:50:14,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 23:50:14,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:14,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 23:50:14,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-13 23:50:14,150 INFO L87 Difference]: Start difference. First operand 1064 states and 1420 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-13 23:50:14,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:14,939 INFO L93 Difference]: Finished difference Result 2502 states and 3328 transitions. [2024-11-13 23:50:14,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 23:50:14,940 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 73 [2024-11-13 23:50:14,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:14,955 INFO L225 Difference]: With dead ends: 2502 [2024-11-13 23:50:14,955 INFO L226 Difference]: Without dead ends: 1700 [2024-11-13 23:50:14,959 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-13 23:50:14,960 INFO L432 NwaCegarLoop]: 409 mSDtfsCounter, 405 mSDsluCounter, 1478 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 1887 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:14,960 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 1887 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 23:50:14,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2024-11-13 23:50:15,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1651. [2024-11-13 23:50:15,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1207 states have (on average 1.3347141673570837) internal successors, (1611), 1220 states have internal predecessors, (1611), 288 states have call successors, (288), 155 states have call predecessors, (288), 155 states have return successors, (288), 275 states have call predecessors, (288), 288 states have call successors, (288) [2024-11-13 23:50:15,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 2187 transitions. [2024-11-13 23:50:15,184 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 2187 transitions. Word has length 73 [2024-11-13 23:50:15,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:15,185 INFO L471 AbstractCegarLoop]: Abstraction has 1651 states and 2187 transitions. [2024-11-13 23:50:15,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-13 23:50:15,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 2187 transitions. [2024-11-13 23:50:15,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-13 23:50:15,187 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:15,188 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 23:50:15,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-13 23:50:15,188 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:50:15,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:15,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1542486590, now seen corresponding path program 1 times [2024-11-13 23:50:15,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:15,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555702455] [2024-11-13 23:50:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:15,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:15,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-13 23:50:15,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:15,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555702455] [2024-11-13 23:50:15,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555702455] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:50:15,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:50:15,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 23:50:15,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434417215] [2024-11-13 23:50:15,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:50:15,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:50:15,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:15,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:50:15,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:50:15,405 INFO L87 Difference]: Start difference. First operand 1651 states and 2187 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-13 23:50:15,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:15,632 INFO L93 Difference]: Finished difference Result 2858 states and 3800 transitions. [2024-11-13 23:50:15,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:50:15,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 76 [2024-11-13 23:50:15,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:15,643 INFO L225 Difference]: With dead ends: 2858 [2024-11-13 23:50:15,643 INFO L226 Difference]: Without dead ends: 1629 [2024-11-13 23:50:15,647 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:50:15,647 INFO L432 NwaCegarLoop]: 215 mSDtfsCounter, 5 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:15,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 638 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:50:15,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2024-11-13 23:50:15,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1629. [2024-11-13 23:50:15,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1196 states have (on average 1.310200668896321) internal successors, (1567), 1209 states have internal predecessors, (1567), 277 states have call successors, (277), 155 states have call predecessors, (277), 155 states have return successors, (277), 264 states have call predecessors, (277), 277 states have call successors, (277) [2024-11-13 23:50:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2121 transitions. [2024-11-13 23:50:15,850 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2121 transitions. Word has length 76 [2024-11-13 23:50:15,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:15,850 INFO L471 AbstractCegarLoop]: Abstraction has 1629 states and 2121 transitions. [2024-11-13 23:50:15,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-13 23:50:15,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2121 transitions. [2024-11-13 23:50:15,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-13 23:50:15,852 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:15,853 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:50:15,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-13 23:50:15,853 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:50:15,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:15,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1391261915, now seen corresponding path program 1 times [2024-11-13 23:50:15,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:15,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716462853] [2024-11-13 23:50:15,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:15,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 23:50:15,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:15,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716462853] [2024-11-13 23:50:15,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716462853] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:50:15,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:50:15,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 23:50:15,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981957689] [2024-11-13 23:50:15,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:50:15,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:50:15,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:15,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:50:15,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:50:15,949 INFO L87 Difference]: Start difference. First operand 1629 states and 2121 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-13 23:50:16,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:16,331 INFO L93 Difference]: Finished difference Result 3720 states and 4864 transitions. [2024-11-13 23:50:16,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 23:50:16,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 75 [2024-11-13 23:50:16,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:16,345 INFO L225 Difference]: With dead ends: 3720 [2024-11-13 23:50:16,345 INFO L226 Difference]: Without dead ends: 2632 [2024-11-13 23:50:16,348 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 [2024-11-13 23:50:16,349 INFO L432 NwaCegarLoop]: 263 mSDtfsCounter, 188 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:16,349 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 724 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:50:16,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2024-11-13 23:50:16,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2347. [2024-11-13 23:50:16,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 1720 states have (on average 1.302906976744186) internal successors, (2241), 1738 states have internal predecessors, (2241), 404 states have call successors, (404), 222 states have call predecessors, (404), 222 states have return successors, (404), 386 states have call predecessors, (404), 404 states have call successors, (404) [2024-11-13 23:50:16,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 3049 transitions. [2024-11-13 23:50:16,637 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 3049 transitions. Word has length 75 [2024-11-13 23:50:16,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:16,637 INFO L471 AbstractCegarLoop]: Abstraction has 2347 states and 3049 transitions. [2024-11-13 23:50:16,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-13 23:50:16,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 3049 transitions. [2024-11-13 23:50:16,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-13 23:50:16,641 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:16,641 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:50:16,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-13 23:50:16,642 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:50:16,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:16,642 INFO L85 PathProgramCache]: Analyzing trace with hash 814223361, now seen corresponding path program 1 times [2024-11-13 23:50:16,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:16,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320955365] [2024-11-13 23:50:16,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:16,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 23:50:16,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:16,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320955365] [2024-11-13 23:50:16,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320955365] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:50:16,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:50:16,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 23:50:16,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901124695] [2024-11-13 23:50:16,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:50:16,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:50:16,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:16,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:50:16,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:50:16,729 INFO L87 Difference]: Start difference. First operand 2347 states and 3049 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-13 23:50:17,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:17,165 INFO L93 Difference]: Finished difference Result 5042 states and 6576 transitions. [2024-11-13 23:50:17,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 23:50:17,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 75 [2024-11-13 23:50:17,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:17,185 INFO L225 Difference]: With dead ends: 5042 [2024-11-13 23:50:17,185 INFO L226 Difference]: Without dead ends: 3262 [2024-11-13 23:50:17,190 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 [2024-11-13 23:50:17,191 INFO L432 NwaCegarLoop]: 413 mSDtfsCounter, 182 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:17,191 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 1017 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:50:17,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3262 states. [2024-11-13 23:50:17,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3262 to 3237. [2024-11-13 23:50:17,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 2369 states have (on average 1.2950612072604475) internal successors, (3068), 2394 states have internal predecessors, (3068), 561 states have call successors, (561), 306 states have call predecessors, (561), 306 states have return successors, (561), 536 states have call predecessors, (561), 561 states have call successors, (561) [2024-11-13 23:50:17,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 4190 transitions. [2024-11-13 23:50:17,622 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 4190 transitions. Word has length 75 [2024-11-13 23:50:17,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:17,623 INFO L471 AbstractCegarLoop]: Abstraction has 3237 states and 4190 transitions. [2024-11-13 23:50:17,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-13 23:50:17,623 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 4190 transitions. [2024-11-13 23:50:17,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-13 23:50:17,629 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:17,630 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:50:17,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-13 23:50:17,630 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:50:17,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:17,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1924167453, now seen corresponding path program 1 times [2024-11-13 23:50:17,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:17,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643369323] [2024-11-13 23:50:17,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:17,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 23:50:17,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:17,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643369323] [2024-11-13 23:50:17,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643369323] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:50:17,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:50:17,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 23:50:17,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074452793] [2024-11-13 23:50:17,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:50:17,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:50:17,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:17,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:50:17,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:50:17,686 INFO L87 Difference]: Start difference. First operand 3237 states and 4190 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-13 23:50:18,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:18,092 INFO L93 Difference]: Finished difference Result 5850 states and 7608 transitions. [2024-11-13 23:50:18,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:50:18,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 76 [2024-11-13 23:50:18,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:18,113 INFO L225 Difference]: With dead ends: 5850 [2024-11-13 23:50:18,113 INFO L226 Difference]: Without dead ends: 3262 [2024-11-13 23:50:18,120 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 [2024-11-13 23:50:18,121 INFO L432 NwaCegarLoop]: 216 mSDtfsCounter, 6 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:18,121 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 404 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:50:18,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3262 states. [2024-11-13 23:50:18,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3262 to 3242. [2024-11-13 23:50:18,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3242 states, 2374 states have (on average 1.2944397641112046) internal successors, (3073), 2399 states have internal predecessors, (3073), 561 states have call successors, (561), 306 states have call predecessors, (561), 306 states have return successors, (561), 536 states have call predecessors, (561), 561 states have call successors, (561) [2024-11-13 23:50:18,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3242 states to 3242 states and 4195 transitions. [2024-11-13 23:50:18,560 INFO L78 Accepts]: Start accepts. Automaton has 3242 states and 4195 transitions. Word has length 76 [2024-11-13 23:50:18,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:18,560 INFO L471 AbstractCegarLoop]: Abstraction has 3242 states and 4195 transitions. [2024-11-13 23:50:18,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-13 23:50:18,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3242 states and 4195 transitions. [2024-11-13 23:50:18,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-13 23:50:18,565 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:18,565 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 23:50:18,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-13 23:50:18,566 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:50:18,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:18,566 INFO L85 PathProgramCache]: Analyzing trace with hash -417616236, now seen corresponding path program 1 times [2024-11-13 23:50:18,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:18,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691042745] [2024-11-13 23:50:18,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:18,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-13 23:50:19,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:19,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691042745] [2024-11-13 23:50:19,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691042745] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:50:19,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109724721] [2024-11-13 23:50:19,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:19,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:50:19,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:50:19,128 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:50:19,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 23:50:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:19,334 INFO L255 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-13 23:50:19,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:50:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 23:50:19,626 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:50:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 23:50:19,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109724721] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:50:19,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [459383438] [2024-11-13 23:50:19,895 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2024-11-13 23:50:19,895 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:50:19,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:50:19,895 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:50:19,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:50:24,517 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 16 for LOIs [2024-11-13 23:50:24,521 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2024-11-13 23:50:24,522 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 18 for LOIs [2024-11-13 23:50:24,532 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 72 for LOIs [2024-11-13 23:50:24,599 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 39 for LOIs [2024-11-13 23:50:24,621 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 68 for LOIs [2024-11-13 23:50:24,743 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:50:34,709 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '65450#(and (exists ((|v_ULTIMATE.start_check_#t~ret20#1_16| Int) (|v_ULTIMATE.start_check_~tmp___12~0#1_15| Int)) (and (exists ((|v_ULTIMATE.start_check_#t~ret11#1_17| Int) (|v_ULTIMATE.start_check_~tmp___1~0#1_16| Int)) (and (<= 0 |v_ULTIMATE.start_check_#t~ret11#1_17|) (not (= |v_ULTIMATE.start_check_#t~ret11#1_17| 0)) (<= |v_ULTIMATE.start_check_#t~ret11#1_17| 1) (= |v_ULTIMATE.start_check_~tmp___1~0#1_16| 1))) (<= 0 |v_ULTIMATE.start_check_#t~ret20#1_16|) (<= |v_ULTIMATE.start_check_#t~ret20#1_16| 1) (= |v_ULTIMATE.start_check_~tmp___12~0#1_15| 1) (= (mod ~side1Failed_History_1~0 256) 0) (not (= |v_ULTIMATE.start_check_#t~ret20#1_16| 0)) (not (= ~side2Failed_History_1~0 0)))) (<= 0 ~side2Failed_History_0~0) (<= ~active_side_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (not (= ~active_side_History_0~0 1)) (<= 0 ~side2Failed_History_1~0) (<= ~side2Failed_History_1~0 1) (<= ~side2Failed_History_0~0 1) (<= 0 ~side2Failed_History_2~0) (= ~side2_written~0 0) (<= 0 (+ ~active_side_History_0~0 128)) (<= ~side2Failed_History_2~0 1))' at error location [2024-11-13 23:50:34,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:50:34,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:50:34,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 9] total 22 [2024-11-13 23:50:34,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684592853] [2024-11-13 23:50:34,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:50:34,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 23:50:34,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:34,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 23:50:34,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=4605, Unknown=0, NotChecked=0, Total=4970 [2024-11-13 23:50:34,713 INFO L87 Difference]: Start difference. First operand 3242 states and 4195 transitions. Second operand has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 17 states have internal predecessors, (85), 4 states have call successors, (16), 4 states have call predecessors, (16), 9 states have return successors, (18), 9 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-13 23:50:36,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:36,960 INFO L93 Difference]: Finished difference Result 7854 states and 10334 transitions. [2024-11-13 23:50:36,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-13 23:50:36,960 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 17 states have internal predecessors, (85), 4 states have call successors, (16), 4 states have call predecessors, (16), 9 states have return successors, (18), 9 states have call predecessors, (18), 4 states have call successors, (18) Word has length 78 [2024-11-13 23:50:36,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:36,987 INFO L225 Difference]: With dead ends: 7854 [2024-11-13 23:50:36,988 INFO L226 Difference]: Without dead ends: 5039 [2024-11-13 23:50:36,996 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=523, Invalid=6959, Unknown=0, NotChecked=0, Total=7482 [2024-11-13 23:50:36,998 INFO L432 NwaCegarLoop]: 304 mSDtfsCounter, 738 mSDsluCounter, 2845 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 3149 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:37,000 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 3149 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-13 23:50:37,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5039 states. [2024-11-13 23:50:37,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5039 to 3921. [2024-11-13 23:50:37,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3921 states, 2864 states have (on average 1.285963687150838) internal successors, (3683), 2896 states have internal predecessors, (3683), 680 states have call successors, (680), 376 states have call predecessors, (680), 376 states have return successors, (680), 648 states have call predecessors, (680), 680 states have call successors, (680) [2024-11-13 23:50:37,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3921 states to 3921 states and 5043 transitions. [2024-11-13 23:50:37,576 INFO L78 Accepts]: Start accepts. Automaton has 3921 states and 5043 transitions. Word has length 78 [2024-11-13 23:50:37,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:37,577 INFO L471 AbstractCegarLoop]: Abstraction has 3921 states and 5043 transitions. [2024-11-13 23:50:37,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 17 states have internal predecessors, (85), 4 states have call successors, (16), 4 states have call predecessors, (16), 9 states have return successors, (18), 9 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-13 23:50:37,577 INFO L276 IsEmpty]: Start isEmpty. Operand 3921 states and 5043 transitions. [2024-11-13 23:50:37,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-13 23:50:37,579 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:37,580 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:50:37,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 23:50:37,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:50:37,785 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:50:37,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:37,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1496402532, now seen corresponding path program 1 times [2024-11-13 23:50:37,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:37,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958326858] [2024-11-13 23:50:37,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:37,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 23:50:37,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:37,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958326858] [2024-11-13 23:50:37,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958326858] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:50:37,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:50:37,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 23:50:37,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6912747] [2024-11-13 23:50:37,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:50:37,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:50:37,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:37,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:50:37,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:50:37,917 INFO L87 Difference]: Start difference. First operand 3921 states and 5043 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-13 23:50:38,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:38,319 INFO L93 Difference]: Finished difference Result 6862 states and 8843 transitions. [2024-11-13 23:50:38,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:50:38,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 77 [2024-11-13 23:50:38,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:38,342 INFO L225 Difference]: With dead ends: 6862 [2024-11-13 23:50:38,342 INFO L226 Difference]: Without dead ends: 3088 [2024-11-13 23:50:38,354 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:50:38,354 INFO L432 NwaCegarLoop]: 220 mSDtfsCounter, 57 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:38,355 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 626 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:50:38,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2024-11-13 23:50:38,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 3088. [2024-11-13 23:50:38,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 2256 states have (on average 1.2929964539007093) internal successors, (2917), 2282 states have internal predecessors, (2917), 533 states have call successors, (533), 298 states have call predecessors, (533), 298 states have return successors, (533), 507 states have call predecessors, (533), 533 states have call successors, (533) [2024-11-13 23:50:38,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 3983 transitions. [2024-11-13 23:50:38,798 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 3983 transitions. Word has length 77 [2024-11-13 23:50:38,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:38,799 INFO L471 AbstractCegarLoop]: Abstraction has 3088 states and 3983 transitions. [2024-11-13 23:50:38,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-13 23:50:38,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 3983 transitions. [2024-11-13 23:50:38,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-13 23:50:38,801 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:38,802 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:50:38,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-13 23:50:38,803 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:50:38,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:38,803 INFO L85 PathProgramCache]: Analyzing trace with hash 381492807, now seen corresponding path program 1 times [2024-11-13 23:50:38,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:38,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5289325] [2024-11-13 23:50:38,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:38,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 23:50:38,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:38,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5289325] [2024-11-13 23:50:38,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5289325] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:50:38,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:50:38,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 23:50:38,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750341577] [2024-11-13 23:50:38,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:50:38,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:50:38,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:38,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:50:38,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:50:38,861 INFO L87 Difference]: Start difference. First operand 3088 states and 3983 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-13 23:50:39,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:39,273 INFO L93 Difference]: Finished difference Result 6009 states and 7768 transitions. [2024-11-13 23:50:39,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:50:39,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 78 [2024-11-13 23:50:39,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:39,298 INFO L225 Difference]: With dead ends: 6009 [2024-11-13 23:50:39,298 INFO L226 Difference]: Without dead ends: 3124 [2024-11-13 23:50:39,305 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 [2024-11-13 23:50:39,307 INFO L432 NwaCegarLoop]: 217 mSDtfsCounter, 6 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:39,308 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 404 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:50:39,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3124 states. [2024-11-13 23:50:39,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3124 to 3094. [2024-11-13 23:50:39,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3094 states, 2262 states have (on average 1.2922192749778956) internal successors, (2923), 2288 states have internal predecessors, (2923), 533 states have call successors, (533), 298 states have call predecessors, (533), 298 states have return successors, (533), 507 states have call predecessors, (533), 533 states have call successors, (533) [2024-11-13 23:50:39,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3094 states to 3094 states and 3989 transitions. [2024-11-13 23:50:39,728 INFO L78 Accepts]: Start accepts. Automaton has 3094 states and 3989 transitions. Word has length 78 [2024-11-13 23:50:39,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:39,729 INFO L471 AbstractCegarLoop]: Abstraction has 3094 states and 3989 transitions. [2024-11-13 23:50:39,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-13 23:50:39,729 INFO L276 IsEmpty]: Start isEmpty. Operand 3094 states and 3989 transitions. [2024-11-13 23:50:39,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-13 23:50:39,730 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:39,731 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:50:39,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-13 23:50:39,731 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:50:39,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:39,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1037315052, now seen corresponding path program 1 times [2024-11-13 23:50:39,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:39,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429477365] [2024-11-13 23:50:39,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:39,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:39,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 23:50:39,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:39,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429477365] [2024-11-13 23:50:39,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429477365] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:50:39,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:50:39,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 23:50:39,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918033927] [2024-11-13 23:50:39,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:50:39,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:50:39,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:39,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:50:39,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:50:39,870 INFO L87 Difference]: Start difference. First operand 3094 states and 3989 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-13 23:50:40,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:40,517 INFO L93 Difference]: Finished difference Result 5890 states and 7597 transitions. [2024-11-13 23:50:40,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:50:40,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 78 [2024-11-13 23:50:40,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:40,549 INFO L225 Difference]: With dead ends: 5890 [2024-11-13 23:50:40,549 INFO L226 Difference]: Without dead ends: 2947 [2024-11-13 23:50:40,556 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:50:40,557 INFO L432 NwaCegarLoop]: 215 mSDtfsCounter, 39 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:40,557 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 616 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:50:40,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2024-11-13 23:50:40,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2402. [2024-11-13 23:50:40,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 1754 states have (on average 1.2919042189281642) internal successors, (2266), 1771 states have internal predecessors, (2266), 416 states have call successors, (416), 231 states have call predecessors, (416), 231 states have return successors, (416), 399 states have call predecessors, (416), 416 states have call successors, (416) [2024-11-13 23:50:40,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 3098 transitions. [2024-11-13 23:50:40,933 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 3098 transitions. Word has length 78 [2024-11-13 23:50:40,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:40,933 INFO L471 AbstractCegarLoop]: Abstraction has 2402 states and 3098 transitions. [2024-11-13 23:50:40,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-13 23:50:40,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 3098 transitions. [2024-11-13 23:50:40,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-13 23:50:40,935 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:40,936 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 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, 1] [2024-11-13 23:50:40,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-13 23:50:40,937 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:50:40,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:40,937 INFO L85 PathProgramCache]: Analyzing trace with hash 999979656, now seen corresponding path program 1 times [2024-11-13 23:50:40,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:40,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260402361] [2024-11-13 23:50:40,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:40,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:41,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 23:50:41,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:41,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260402361] [2024-11-13 23:50:41,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260402361] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:50:41,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755704429] [2024-11-13 23:50:41,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:41,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:50:41,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:50:41,794 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:50:41,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 23:50:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:41,965 INFO L255 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 23:50:41,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:50:42,505 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-13 23:50:42,505 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:50:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 23:50:42,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755704429] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:50:42,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [373290394] [2024-11-13 23:50:42,862 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2024-11-13 23:50:42,862 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:50:42,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:50:42,863 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:50:42,863 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:50:49,460 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 16 for LOIs [2024-11-13 23:50:49,464 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2024-11-13 23:50:49,465 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 19 for LOIs [2024-11-13 23:50:49,481 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 47 for LOIs [2024-11-13 23:50:49,499 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 135 for LOIs [2024-11-13 23:50:49,802 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 68 for LOIs [2024-11-13 23:50:49,938 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:51:04,398 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '119562#(and (<= 0 ~side2Failed_History_0~0) (<= ~active_side_History_0~0 127) (= ~manual_selection_History_1~0 0) (exists ((|v_ULTIMATE.start_check_~tmp___12~0#1_20| Int) (|v_ULTIMATE.start_check_#t~ret20#1_22| Int)) (and (not (= |v_ULTIMATE.start_check_#t~ret20#1_22| 0)) (<= 0 |v_ULTIMATE.start_check_#t~ret20#1_22|) (<= |v_ULTIMATE.start_check_#t~ret20#1_22| 1) (= |v_ULTIMATE.start_check_~tmp___12~0#1_20| 1))) (= |assert_#in~arg| 0) (not (= ~active_side_History_0~0 1)) (<= 0 ~side2Failed_History_1~0) (<= ~side2Failed_History_1~0 1) (<= ~side2Failed_History_0~0 1) (<= 0 ~side2Failed_History_2~0) (= ~side2_written~0 0) (<= 0 (+ ~active_side_History_0~0 128)) (<= ~side2Failed_History_2~0 1))' at error location [2024-11-13 23:51:04,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:51:04,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:51:04,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 10] total 26 [2024-11-13 23:51:04,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814248475] [2024-11-13 23:51:04,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:51:04,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-13 23:51:04,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:51:04,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-13 23:51:04,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=5302, Unknown=0, NotChecked=0, Total=5700 [2024-11-13 23:51:04,401 INFO L87 Difference]: Start difference. First operand 2402 states and 3098 transitions. Second operand has 26 states, 21 states have (on average 5.857142857142857) internal successors, (123), 21 states have internal predecessors, (123), 6 states have call successors, (29), 4 states have call predecessors, (29), 10 states have return successors, (29), 9 states have call predecessors, (29), 6 states have call successors, (29) [2024-11-13 23:51:05,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:51:05,680 INFO L93 Difference]: Finished difference Result 4720 states and 6075 transitions. [2024-11-13 23:51:05,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 23:51:05,681 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 5.857142857142857) internal successors, (123), 21 states have internal predecessors, (123), 6 states have call successors, (29), 4 states have call predecessors, (29), 10 states have return successors, (29), 9 states have call predecessors, (29), 6 states have call successors, (29) Word has length 85 [2024-11-13 23:51:05,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:51:05,701 INFO L225 Difference]: With dead ends: 4720 [2024-11-13 23:51:05,701 INFO L226 Difference]: Without dead ends: 2473 [2024-11-13 23:51:05,707 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 185 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2831 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=508, Invalid=7148, Unknown=0, NotChecked=0, Total=7656 [2024-11-13 23:51:05,709 INFO L432 NwaCegarLoop]: 181 mSDtfsCounter, 501 mSDsluCounter, 2195 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 2376 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 23:51:05,709 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 2376 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 23:51:05,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2024-11-13 23:51:05,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 2381. [2024-11-13 23:51:05,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 1739 states have (on average 1.288671650373778) internal successors, (2241), 1756 states have internal predecessors, (2241), 410 states have call successors, (410), 231 states have call predecessors, (410), 231 states have return successors, (410), 393 states have call predecessors, (410), 410 states have call successors, (410) [2024-11-13 23:51:05,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 3061 transitions. [2024-11-13 23:51:06,006 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 3061 transitions. Word has length 85 [2024-11-13 23:51:06,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:51:06,006 INFO L471 AbstractCegarLoop]: Abstraction has 2381 states and 3061 transitions. [2024-11-13 23:51:06,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 5.857142857142857) internal successors, (123), 21 states have internal predecessors, (123), 6 states have call successors, (29), 4 states have call predecessors, (29), 10 states have return successors, (29), 9 states have call predecessors, (29), 6 states have call successors, (29) [2024-11-13 23:51:06,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 3061 transitions. [2024-11-13 23:51:06,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-13 23:51:06,008 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:51:06,008 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 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] [2024-11-13 23:51:06,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 23:51:06,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-13 23:51:06,209 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:51:06,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:51:06,209 INFO L85 PathProgramCache]: Analyzing trace with hash 667893638, now seen corresponding path program 1 times [2024-11-13 23:51:06,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:51:06,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663684726] [2024-11-13 23:51:06,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:51:06,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:51:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:51:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-13 23:51:06,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:51:06,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663684726] [2024-11-13 23:51:06,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663684726] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:51:06,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:51:06,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 23:51:06,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950944882] [2024-11-13 23:51:06,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:51:06,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:51:06,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:51:06,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:51:06,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:51:06,411 INFO L87 Difference]: Start difference. First operand 2381 states and 3061 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-13 23:51:06,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:51:06,759 INFO L93 Difference]: Finished difference Result 4492 states and 5810 transitions. [2024-11-13 23:51:06,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:51:06,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 92 [2024-11-13 23:51:06,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:51:06,774 INFO L225 Difference]: With dead ends: 4492 [2024-11-13 23:51:06,775 INFO L226 Difference]: Without dead ends: 2347 [2024-11-13 23:51:06,779 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:51:06,780 INFO L432 NwaCegarLoop]: 211 mSDtfsCounter, 5 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:51:06,781 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 620 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:51:06,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2024-11-13 23:51:07,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 2347. [2024-11-13 23:51:07,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 1722 states have (on average 1.2619047619047619) internal successors, (2173), 1739 states have internal predecessors, (2173), 393 states have call successors, (393), 231 states have call predecessors, (393), 231 states have return successors, (393), 376 states have call predecessors, (393), 393 states have call successors, (393) [2024-11-13 23:51:07,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 2959 transitions. [2024-11-13 23:51:07,107 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 2959 transitions. Word has length 92 [2024-11-13 23:51:07,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:51:07,107 INFO L471 AbstractCegarLoop]: Abstraction has 2347 states and 2959 transitions. [2024-11-13 23:51:07,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-13 23:51:07,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 2959 transitions. [2024-11-13 23:51:07,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-13 23:51:07,111 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:51:07,111 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 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, 1, 1, 1] [2024-11-13 23:51:07,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-13 23:51:07,111 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:51:07,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:51:07,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1869077053, now seen corresponding path program 1 times [2024-11-13 23:51:07,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:51:07,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949034687] [2024-11-13 23:51:07,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:51:07,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:51:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:51:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-13 23:51:07,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:51:07,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949034687] [2024-11-13 23:51:07,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949034687] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:51:07,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:51:07,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 23:51:07,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582006488] [2024-11-13 23:51:07,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:51:07,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:51:07,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:51:07,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:51:07,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:51:07,324 INFO L87 Difference]: Start difference. First operand 2347 states and 2959 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2024-11-13 23:51:07,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:51:07,655 INFO L93 Difference]: Finished difference Result 4376 states and 5555 transitions. [2024-11-13 23:51:07,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:51:07,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 108 [2024-11-13 23:51:07,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:51:07,671 INFO L225 Difference]: With dead ends: 4376 [2024-11-13 23:51:07,671 INFO L226 Difference]: Without dead ends: 2313 [2024-11-13 23:51:07,676 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:51:07,676 INFO L432 NwaCegarLoop]: 207 mSDtfsCounter, 5 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:51:07,678 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 608 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:51:07,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2024-11-13 23:51:07,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2238. [2024-11-13 23:51:07,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 1651 states have (on average 1.23137492428831) internal successors, (2033), 1668 states have internal predecessors, (2033), 364 states have call successors, (364), 222 states have call predecessors, (364), 222 states have return successors, (364), 347 states have call predecessors, (364), 364 states have call successors, (364) [2024-11-13 23:51:07,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 2761 transitions. [2024-11-13 23:51:07,952 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 2761 transitions. Word has length 108 [2024-11-13 23:51:07,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:51:07,953 INFO L471 AbstractCegarLoop]: Abstraction has 2238 states and 2761 transitions. [2024-11-13 23:51:07,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2024-11-13 23:51:07,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 2761 transitions. [2024-11-13 23:51:07,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-13 23:51:07,956 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:51:07,957 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:51:07,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-13 23:51:07,957 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:51:07,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:51:07,958 INFO L85 PathProgramCache]: Analyzing trace with hash 270756800, now seen corresponding path program 1 times [2024-11-13 23:51:07,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:51:07,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123905510] [2024-11-13 23:51:07,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:51:07,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:51:07,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:51:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2024-11-13 23:51:08,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:51:08,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123905510] [2024-11-13 23:51:08,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123905510] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:51:08,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:51:08,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 23:51:08,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260755301] [2024-11-13 23:51:08,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:51:08,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:51:08,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:51:08,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:51:08,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:51:08,166 INFO L87 Difference]: Start difference. First operand 2238 states and 2761 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2024-11-13 23:51:08,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:51:08,475 INFO L93 Difference]: Finished difference Result 4123 states and 5122 transitions. [2024-11-13 23:51:08,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:51:08,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 124 [2024-11-13 23:51:08,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:51:08,491 INFO L225 Difference]: With dead ends: 4123 [2024-11-13 23:51:08,491 INFO L226 Difference]: Without dead ends: 2196 [2024-11-13 23:51:08,495 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:51:08,496 INFO L432 NwaCegarLoop]: 204 mSDtfsCounter, 4 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:51:08,496 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 599 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:51:08,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2024-11-13 23:51:08,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 2085. [2024-11-13 23:51:08,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2085 states, 1538 states have (on average 1.2035110533159947) internal successors, (1851), 1555 states have internal predecessors, (1851), 337 states have call successors, (337), 209 states have call predecessors, (337), 209 states have return successors, (337), 320 states have call predecessors, (337), 337 states have call successors, (337) [2024-11-13 23:51:08,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2085 states to 2085 states and 2525 transitions. [2024-11-13 23:51:08,763 INFO L78 Accepts]: Start accepts. Automaton has 2085 states and 2525 transitions. Word has length 124 [2024-11-13 23:51:08,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:51:08,766 INFO L471 AbstractCegarLoop]: Abstraction has 2085 states and 2525 transitions. [2024-11-13 23:51:08,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2024-11-13 23:51:08,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2085 states and 2525 transitions. [2024-11-13 23:51:08,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-13 23:51:08,770 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:51:08,770 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:51:08,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-13 23:51:08,771 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:51:08,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:51:08,771 INFO L85 PathProgramCache]: Analyzing trace with hash 201673949, now seen corresponding path program 1 times [2024-11-13 23:51:08,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:51:08,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106173459] [2024-11-13 23:51:08,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:51:08,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:51:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:51:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-13 23:51:09,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:51:09,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106173459] [2024-11-13 23:51:09,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106173459] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:51:09,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748250351] [2024-11-13 23:51:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:51:09,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:51:09,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:51:09,453 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:51:09,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 23:51:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:51:09,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 23:51:09,650 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:51:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 61 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-13 23:51:09,935 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:51:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-13 23:51:10,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748250351] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:51:10,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [234416148] [2024-11-13 23:51:10,148 INFO L159 IcfgInterpreter]: Started Sifa with 86 locations of interest [2024-11-13 23:51:10,148 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:51:10,148 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:51:10,148 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:51:10,149 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:51:22,640 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 18 for LOIs [2024-11-13 23:51:22,660 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2024-11-13 23:51:22,661 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 20 for LOIs [2024-11-13 23:51:22,695 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 212 for LOIs [2024-11-13 23:51:23,281 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 190 for LOIs [2024-11-13 23:51:25,471 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 24 for LOIs [2024-11-13 23:51:25,488 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:52:11,112 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '157006#(and (<= 0 ~side2Failed_History_0~0) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (exists ((|v_ULTIMATE.start_check_#t~ret26#1_20| Int) (|v_ULTIMATE.start_check_~tmp___14~0#1_19| Int) (|v_ULTIMATE.start_check_~tmp___15~0#1_19| Int)) (and (= |v_ULTIMATE.start_check_~tmp___15~0#1_19| |v_ULTIMATE.start_check_~tmp___14~0#1_19|) (<= |v_ULTIMATE.start_check_#t~ret26#1_20| 1) (or (and (= |v_ULTIMATE.start_check_~tmp___15~0#1_19| 1) (not (= |v_ULTIMATE.start_check_#t~ret26#1_20| 0))) (and (= |v_ULTIMATE.start_check_#t~ret26#1_20| 0) (= |v_ULTIMATE.start_check_~tmp___15~0#1_19| 0))) (or (and (= ~s1p_new~0 ~nomsg~0) (not (= (mod ~side1Failed~0 256) 0)) (exists ((|v_ULTIMATE.start_check_~tmp___7~0#1_26| Int) (|v_ULTIMATE.start_check_#t~ret15#1_30| Int)) (and (= |v_ULTIMATE.start_check_#t~ret15#1_30| 0) (= |v_ULTIMATE.start_check_~tmp___7~0#1_26| 0))) (exists ((|v_ULTIMATE.start_check_#t~ret19#1_27| Int) (|v_ULTIMATE.start_check_~tmp___11~0#1_24| Int)) (and (= |v_ULTIMATE.start_check_~tmp___11~0#1_24| 1) (<= 0 |v_ULTIMATE.start_check_#t~ret19#1_27|) (not (= |v_ULTIMATE.start_check_#t~ret19#1_27| 0)) (<= |v_ULTIMATE.start_check_#t~ret19#1_27| 1))) (exists ((|v_ULTIMATE.start_check_#t~ret11#1_27| Int) (|v_ULTIMATE.start_check_~tmp___1~0#1_24| Int)) (and (= |v_ULTIMATE.start_check_#t~ret11#1_27| 0) (= |v_ULTIMATE.start_check_~tmp___1~0#1_24| 0))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (exists ((|v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side1~2#1_32| Int) (|v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side2~2#1_32| Int)) (and (not (= 1 |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side2~2#1_32|)) (not (= |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side1~2#1_32| 0)) (not (= |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side1~2#1_32| 1)) (or (and (= ~active_side_History_0~0 0) (not (= ~nomsg~0 |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side1~2#1_32|))) (and (or (and (not (= 0 |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side2~2#1_32|)) (= ~active_side_History_0~0 0)) (and (= 2 ~active_side_History_0~0) (= 0 |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side2~2#1_32|))) (= ~nomsg~0 |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side1~2#1_32|))))) (exists ((|v_ULTIMATE.start_check_#t~ret12#1_23| Int) (|v_ULTIMATE.start_check_~tmp___2~0#1_21| Int)) (and (<= |v_ULTIMATE.start_check_#t~ret12#1_23| 1) (<= 0 |v_ULTIMATE.start_check_#t~ret12#1_23|) (not (= |v_ULTIMATE.start_check_#t~ret12#1_23| 0)) (= |v_ULTIMATE.start_check_~tmp___2~0#1_21| 1))) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (exists ((|v_ULTIMATE.start_check_#t~ret25#1_20| Int)) (and (<= 0 |v_ULTIMATE.start_check_#t~ret25#1_20|) (<= |v_ULTIMATE.start_check_#t~ret25#1_20| 1) (or (and (= |v_ULTIMATE.start_check_#t~ret25#1_20| 0) (= |v_ULTIMATE.start_check_~tmp___14~0#1_19| 0)) (and (= |v_ULTIMATE.start_check_~tmp___14~0#1_19| 1) (not (= |v_ULTIMATE.start_check_#t~ret25#1_20| 0)))))) (= ~nomsg~0 ~cs1_new~0) (= ~nomsg~0 ~s2s2_new~0) (= ~nomsg~0 ~cs2_new~0) (= ~nomsg~0 ~s1s2_new~0)) (and (= ~s1p_new~0 ~nomsg~0) (exists ((|v_ULTIMATE.start_check_~tmp___7~0#1_26| Int) (|v_ULTIMATE.start_check_#t~ret15#1_30| Int)) (and (= |v_ULTIMATE.start_check_#t~ret15#1_30| 0) (= |v_ULTIMATE.start_check_~tmp___7~0#1_26| 0))) (exists ((|v_ULTIMATE.start_check_#t~ret19#1_27| Int) (|v_ULTIMATE.start_check_~tmp___11~0#1_24| Int)) (and (= |v_ULTIMATE.start_check_~tmp___11~0#1_24| 1) (<= 0 |v_ULTIMATE.start_check_#t~ret19#1_27|) (not (= |v_ULTIMATE.start_check_#t~ret19#1_27| 0)) (<= |v_ULTIMATE.start_check_#t~ret19#1_27| 1))) (exists ((|v_ULTIMATE.start_check_#t~ret11#1_27| Int) (|v_ULTIMATE.start_check_~tmp___1~0#1_24| Int)) (and (= |v_ULTIMATE.start_check_#t~ret11#1_27| 0) (= |v_ULTIMATE.start_check_~tmp___1~0#1_24| 0))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (exists ((|v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side1~2#1_32| Int) (|v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side2~2#1_32| Int)) (and (not (= 1 |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side2~2#1_32|)) (not (= |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side1~2#1_32| 0)) (not (= |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side1~2#1_32| 1)) (or (and (= ~active_side_History_0~0 0) (not (= ~nomsg~0 |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side1~2#1_32|))) (and (or (and (not (= 0 |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side2~2#1_32|)) (= ~active_side_History_0~0 0)) (and (= 2 ~active_side_History_0~0) (= 0 |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side2~2#1_32|))) (= ~nomsg~0 |v_ULTIMATE.start_Pendulum_prism_task_each_pals_period_~side1~2#1_32|))))) (exists ((|v_ULTIMATE.start_check_#t~ret12#1_23| Int) (|v_ULTIMATE.start_check_~tmp___2~0#1_21| Int)) (and (<= |v_ULTIMATE.start_check_#t~ret12#1_23| 1) (<= 0 |v_ULTIMATE.start_check_#t~ret12#1_23|) (not (= |v_ULTIMATE.start_check_#t~ret12#1_23| 0)) (= |v_ULTIMATE.start_check_~tmp___2~0#1_21| 1))) (= ~nomsg~0 ~s2p_new~0) (exists ((|v_ULTIMATE.start_check_#t~ret25#1_20| Int)) (and (<= 0 |v_ULTIMATE.start_check_#t~ret25#1_20|) (<= |v_ULTIMATE.start_check_#t~ret25#1_20| 1) (or (and (= |v_ULTIMATE.start_check_#t~ret25#1_20| 0) (= |v_ULTIMATE.start_check_~tmp___14~0#1_19| 0)) (and (= |v_ULTIMATE.start_check_~tmp___14~0#1_19| 1) (not (= |v_ULTIMATE.start_check_#t~ret25#1_20| 0)))))) (= ~nomsg~0 ~cs1_new~0) (= ~nomsg~0 ~s2s2_new~0) (= (mod ~side1Failed~0 256) 0) (= ~nomsg~0 ~cs2_new~0) (= ~nomsg~0 ~s1s2_new~0))) (<= 0 |v_ULTIMATE.start_check_#t~ret26#1_20|))) (<= 0 ~side2Failed_History_1~0) (<= ~side2Failed_History_1~0 1) (<= ~side2Failed_History_0~0 1) (<= 0 ~side2Failed_History_2~0) (exists ((|v_ULTIMATE.start_check_#t~ret27#1_20| Int) (|v_ULTIMATE.start_check_~tmp___16~0#1_19| Int) (|v_ULTIMATE.start_check_#t~ret28#1_20| Int) (|v_ULTIMATE.start_check_~tmp___17~0#1_19| Int)) (and (<= 0 |v_ULTIMATE.start_check_#t~ret28#1_20|) (= |v_ULTIMATE.start_check_~tmp___17~0#1_19| |v_ULTIMATE.start_check_~tmp___16~0#1_19|) (<= 0 |v_ULTIMATE.start_check_#t~ret27#1_20|) (or (and (not (= |v_ULTIMATE.start_check_#t~ret28#1_20| 0)) (= |v_ULTIMATE.start_check_~tmp___17~0#1_19| 1)) (and (= |v_ULTIMATE.start_check_#t~ret28#1_20| 0) (= |v_ULTIMATE.start_check_~tmp___17~0#1_19| 0))) (<= |v_ULTIMATE.start_check_#t~ret28#1_20| 1) (or (and (= |v_ULTIMATE.start_check_~tmp___16~0#1_19| 0) (= |v_ULTIMATE.start_check_#t~ret27#1_20| 0)) (and (= |v_ULTIMATE.start_check_~tmp___16~0#1_19| 1) (not (= |v_ULTIMATE.start_check_#t~ret27#1_20| 0)))) (<= |v_ULTIMATE.start_check_#t~ret27#1_20| 1))) (= ~side2_written~0 0) (= ~manual_selection_History_2~0 0) (exists ((|v_ULTIMATE.start_check_~tmp___19~0#1_19| Int) (|v_ULTIMATE.start_check_~tmp___18~0#1_19| Int)) (and (not (= |v_ULTIMATE.start_check_~tmp___18~0#1_19| |v_ULTIMATE.start_check_~tmp___19~0#1_19|)) (<= 0 (+ |v_ULTIMATE.start_check_~tmp___18~0#1_19| 128)) (<= 0 (+ 128 |v_ULTIMATE.start_check_~tmp___19~0#1_19|)) (<= |v_ULTIMATE.start_check_~tmp___18~0#1_19| 127) (<= |v_ULTIMATE.start_check_~tmp___19~0#1_19| 127))) (<= ~side2Failed_History_2~0 1))' at error location [2024-11-13 23:52:11,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:52:11,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:52:11,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-11-13 23:52:11,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413633821] [2024-11-13 23:52:11,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:52:11,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 23:52:11,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:52:11,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 23:52:11,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=6155, Unknown=0, NotChecked=0, Total=6642 [2024-11-13 23:52:11,116 INFO L87 Difference]: Start difference. First operand 2085 states and 2525 transitions. Second operand has 19 states, 14 states have (on average 11.214285714285714) internal successors, (157), 16 states have internal predecessors, (157), 8 states have call successors, (42), 4 states have call predecessors, (42), 9 states have return successors, (41), 8 states have call predecessors, (41), 8 states have call successors, (41) [2024-11-13 23:52:12,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:52:12,156 INFO L93 Difference]: Finished difference Result 5115 states and 6162 transitions. [2024-11-13 23:52:12,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-13 23:52:12,156 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 11.214285714285714) internal successors, (157), 16 states have internal predecessors, (157), 8 states have call successors, (42), 4 states have call predecessors, (42), 9 states have return successors, (41), 8 states have call predecessors, (41), 8 states have call successors, (41) Word has length 134 [2024-11-13 23:52:12,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:52:12,176 INFO L225 Difference]: With dead ends: 5115 [2024-11-13 23:52:12,176 INFO L226 Difference]: Without dead ends: 3197 [2024-11-13 23:52:12,182 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 317 SyntacticMatches, 16 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3210 ImplicationChecksByTransitivity, 46.1s TimeCoverageRelationStatistics Valid=588, Invalid=8724, Unknown=0, NotChecked=0, Total=9312 [2024-11-13 23:52:12,183 INFO L432 NwaCegarLoop]: 226 mSDtfsCounter, 222 mSDsluCounter, 2596 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 2822 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 23:52:12,184 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 2822 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 23:52:12,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2024-11-13 23:52:12,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 2283. [2024-11-13 23:52:12,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 1683 states have (on average 1.196078431372549) internal successors, (2013), 1703 states have internal predecessors, (2013), 364 states have call successors, (364), 235 states have call predecessors, (364), 235 states have return successors, (364), 344 states have call predecessors, (364), 364 states have call successors, (364) [2024-11-13 23:52:12,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 2741 transitions. [2024-11-13 23:52:12,503 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 2741 transitions. Word has length 134 [2024-11-13 23:52:12,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:52:12,504 INFO L471 AbstractCegarLoop]: Abstraction has 2283 states and 2741 transitions. [2024-11-13 23:52:12,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 11.214285714285714) internal successors, (157), 16 states have internal predecessors, (157), 8 states have call successors, (42), 4 states have call predecessors, (42), 9 states have return successors, (41), 8 states have call predecessors, (41), 8 states have call successors, (41) [2024-11-13 23:52:12,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 2741 transitions. [2024-11-13 23:52:12,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-13 23:52:12,508 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:52:12,508 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:52:12,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 23:52:12,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-13 23:52:12,709 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:52:12,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:52:12,709 INFO L85 PathProgramCache]: Analyzing trace with hash -872921583, now seen corresponding path program 1 times [2024-11-13 23:52:12,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:52:12,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370998916] [2024-11-13 23:52:12,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:52:12,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:52:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:52:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2024-11-13 23:52:13,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:52:13,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370998916] [2024-11-13 23:52:13,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370998916] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:52:13,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943609367] [2024-11-13 23:52:13,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:52:13,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:52:13,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:52:13,123 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:52:13,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 23:52:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:52:13,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-13 23:52:13,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:52:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-13 23:52:14,293 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:52:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-13 23:52:15,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943609367] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:52:15,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [203383997] [2024-11-13 23:52:15,548 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2024-11-13 23:52:15,549 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:52:15,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:52:15,549 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:52:15,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:52:23,458 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 72 for LOIs [2024-11-13 23:52:23,648 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2024-11-13 23:52:23,649 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 40 for LOIs [2024-11-13 23:52:23,692 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 144 for LOIs [2024-11-13 23:52:24,183 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 74 for LOIs [2024-11-13 23:52:24,243 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 16 for LOIs [2024-11-13 23:52:24,248 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:52:38,608 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '168070#(exists ((|v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_13| Int)) (and (<= 0 ~side2Failed_History_0~0) (<= ~active_side_History_0~0 127) (= |assert_#in~arg| 0) (<= ~manual_selection_History_1~0 127) (exists ((|v_ULTIMATE.start_check_#t~ret16#1_28| Int) (|v_ULTIMATE.start_check_~tmp___8~0#1_26| Int)) (and (= |v_ULTIMATE.start_check_#t~ret16#1_28| 0) (= ~side2Failed_History_1~0 0) (exists ((|v_ULTIMATE.start_check_~tmp___7~0#1_34| Int) (|v_ULTIMATE.start_check_#t~ret15#1_40| Int)) (and (not (= |v_ULTIMATE.start_check_#t~ret15#1_40| 0)) (= |v_ULTIMATE.start_check_~tmp___7~0#1_34| 1) (<= |v_ULTIMATE.start_check_#t~ret15#1_40| 1) (<= 0 |v_ULTIMATE.start_check_#t~ret15#1_40|))) (= |v_ULTIMATE.start_check_~tmp___8~0#1_26| 0))) (<= ~side2Failed_History_0~0 1) (<= 0 ~side2Failed_History_2~0) (= ~side2_written~0 0) (not (= 2 ~active_side_History_0~0)) (<= 0 (+ ~manual_selection_History_1~0 128)) (= |v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_13| 0) (<= 0 (+ ~active_side_History_0~0 128)) (<= ~side2Failed_History_2~0 1)))' at error location [2024-11-13 23:52:38,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:52:38,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:52:38,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 17] total 33 [2024-11-13 23:52:38,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466600554] [2024-11-13 23:52:38,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:52:38,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-13 23:52:38,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:52:38,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-13 23:52:38,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=573, Invalid=7983, Unknown=0, NotChecked=0, Total=8556 [2024-11-13 23:52:38,612 INFO L87 Difference]: Start difference. First operand 2283 states and 2741 transitions. Second operand has 33 states, 33 states have (on average 6.333333333333333) internal successors, (209), 32 states have internal predecessors, (209), 11 states have call successors, (51), 5 states have call predecessors, (51), 7 states have return successors, (50), 12 states have call predecessors, (50), 11 states have call successors, (50) [2024-11-13 23:52:45,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:52:45,790 INFO L93 Difference]: Finished difference Result 7343 states and 9044 transitions. [2024-11-13 23:52:45,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-13 23:52:45,791 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.333333333333333) internal successors, (209), 32 states have internal predecessors, (209), 11 states have call successors, (51), 5 states have call predecessors, (51), 7 states have return successors, (50), 12 states have call predecessors, (50), 11 states have call successors, (50) Word has length 144 [2024-11-13 23:52:45,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:52:45,816 INFO L225 Difference]: With dead ends: 7343 [2024-11-13 23:52:45,816 INFO L226 Difference]: Without dead ends: 5255 [2024-11-13 23:52:45,827 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 357 SyntacticMatches, 7 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9362 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=2202, Invalid=21360, Unknown=0, NotChecked=0, Total=23562 [2024-11-13 23:52:45,828 INFO L432 NwaCegarLoop]: 463 mSDtfsCounter, 4410 mSDsluCounter, 4559 mSDsCounter, 0 mSdLazyCounter, 3176 mSolverCounterSat, 1721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4410 SdHoareTripleChecker+Valid, 5022 SdHoareTripleChecker+Invalid, 4897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1721 IncrementalHoareTripleChecker+Valid, 3176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-11-13 23:52:45,828 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4410 Valid, 5022 Invalid, 4897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1721 Valid, 3176 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-11-13 23:52:45,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5255 states. [2024-11-13 23:52:46,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5255 to 4096. [2024-11-13 23:52:46,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4096 states, 3034 states have (on average 1.1858932102834543) internal successors, (3598), 3067 states have internal predecessors, (3598), 639 states have call successors, (639), 422 states have call predecessors, (639), 422 states have return successors, (639), 606 states have call predecessors, (639), 639 states have call successors, (639) [2024-11-13 23:52:46,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4096 states to 4096 states and 4876 transitions. [2024-11-13 23:52:46,597 INFO L78 Accepts]: Start accepts. Automaton has 4096 states and 4876 transitions. Word has length 144 [2024-11-13 23:52:46,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:52:46,597 INFO L471 AbstractCegarLoop]: Abstraction has 4096 states and 4876 transitions. [2024-11-13 23:52:46,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.333333333333333) internal successors, (209), 32 states have internal predecessors, (209), 11 states have call successors, (51), 5 states have call predecessors, (51), 7 states have return successors, (50), 12 states have call predecessors, (50), 11 states have call successors, (50) [2024-11-13 23:52:46,598 INFO L276 IsEmpty]: Start isEmpty. Operand 4096 states and 4876 transitions. [2024-11-13 23:52:46,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-13 23:52:46,604 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:52:46,604 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:52:46,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 23:52:46,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-13 23:52:46,805 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:52:46,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:52:46,806 INFO L85 PathProgramCache]: Analyzing trace with hash -270878095, now seen corresponding path program 1 times [2024-11-13 23:52:46,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:52:46,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565357096] [2024-11-13 23:52:46,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:52:46,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:52:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:52:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-13 23:52:47,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:52:47,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565357096] [2024-11-13 23:52:47,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565357096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:52:47,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543375780] [2024-11-13 23:52:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:52:47,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:52:47,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:52:47,728 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:52:47,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 23:52:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:52:47,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-13 23:52:47,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:52:48,224 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 23 proven. 52 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-13 23:52:48,224 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:52:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-13 23:52:48,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543375780] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:52:48,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1642162475] [2024-11-13 23:52:48,516 INFO L159 IcfgInterpreter]: Started Sifa with 80 locations of interest [2024-11-13 23:52:48,519 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:52:48,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:52:48,520 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:52:48,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:53:02,728 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 16 for LOIs [2024-11-13 23:53:02,748 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2024-11-13 23:53:02,749 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 44 for LOIs [2024-11-13 23:53:02,826 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 146 for LOIs [2024-11-13 23:53:03,420 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 76 for LOIs [2024-11-13 23:53:03,479 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 20 for LOIs [2024-11-13 23:53:03,521 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:53:18,299 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '184711#(exists ((|v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_24| Int)) (and (<= 0 ~side2Failed_History_0~0) (<= ~active_side_History_0~0 127) (= |assert_#in~arg| 0) (<= ~manual_selection_History_1~0 127) (<= ~active_side_History_1~0 127) (exists ((|v_ULTIMATE.start_check_~tmp___8~0#1_34| Int) (|v_ULTIMATE.start_check_#t~ret16#1_37| Int)) (and (= ~side2Failed_History_1~0 0) (= |v_ULTIMATE.start_check_#t~ret16#1_37| 0) (exists ((|v_ULTIMATE.start_check_~tmp___7~0#1_44| Int) (|v_ULTIMATE.start_check_#t~ret15#1_52| Int)) (and (<= |v_ULTIMATE.start_check_#t~ret15#1_52| 1) (not (= |v_ULTIMATE.start_check_#t~ret15#1_52| 0)) (= |v_ULTIMATE.start_check_~tmp___7~0#1_44| 1) (<= 0 |v_ULTIMATE.start_check_#t~ret15#1_52|))) (= |v_ULTIMATE.start_check_~tmp___8~0#1_34| 0))) (<= ~side2Failed_History_0~0 1) (<= 0 ~side2Failed_History_2~0) (= |v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_24| 0) (not (= 2 ~active_side_History_0~0)) (<= 0 (+ ~manual_selection_History_1~0 128)) (<= 0 (+ ~active_side_History_1~0 128)) (<= 0 (+ ~active_side_History_0~0 128)) (<= ~side2Failed_History_2~0 1)))' at error location [2024-11-13 23:53:18,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:53:18,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:53:18,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 8] total 23 [2024-11-13 23:53:18,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385161756] [2024-11-13 23:53:18,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:53:18,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 23:53:18,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:53:18,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 23:53:18,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=6741, Unknown=0, NotChecked=0, Total=7140 [2024-11-13 23:53:18,302 INFO L87 Difference]: Start difference. First operand 4096 states and 4876 transitions. Second operand has 23 states, 23 states have (on average 8.956521739130435) internal successors, (206), 20 states have internal predecessors, (206), 9 states have call successors, (49), 4 states have call predecessors, (49), 8 states have return successors, (48), 12 states have call predecessors, (48), 9 states have call successors, (48) [2024-11-13 23:53:21,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:53:21,272 INFO L93 Difference]: Finished difference Result 10039 states and 11958 transitions. [2024-11-13 23:53:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-13 23:53:21,272 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 8.956521739130435) internal successors, (206), 20 states have internal predecessors, (206), 9 states have call successors, (49), 4 states have call predecessors, (49), 8 states have return successors, (48), 12 states have call predecessors, (48), 9 states have call successors, (48) Word has length 144 [2024-11-13 23:53:21,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:53:21,308 INFO L225 Difference]: With dead ends: 10039 [2024-11-13 23:53:21,308 INFO L226 Difference]: Without dead ends: 7607 [2024-11-13 23:53:21,318 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 353 SyntacticMatches, 9 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4210 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=637, Invalid=10075, Unknown=0, NotChecked=0, Total=10712 [2024-11-13 23:53:21,318 INFO L432 NwaCegarLoop]: 603 mSDtfsCounter, 895 mSDsluCounter, 5154 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 5757 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:53:21,319 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 5757 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-13 23:53:21,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7607 states. [2024-11-13 23:53:22,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7607 to 4662. [2024-11-13 23:53:22,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4662 states, 3465 states have (on average 1.1927849927849927) internal successors, (4133), 3502 states have internal predecessors, (4133), 717 states have call successors, (717), 479 states have call predecessors, (717), 479 states have return successors, (717), 680 states have call predecessors, (717), 717 states have call successors, (717) [2024-11-13 23:53:22,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4662 states to 4662 states and 5567 transitions. [2024-11-13 23:53:22,220 INFO L78 Accepts]: Start accepts. Automaton has 4662 states and 5567 transitions. Word has length 144 [2024-11-13 23:53:22,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:53:22,221 INFO L471 AbstractCegarLoop]: Abstraction has 4662 states and 5567 transitions. [2024-11-13 23:53:22,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.956521739130435) internal successors, (206), 20 states have internal predecessors, (206), 9 states have call successors, (49), 4 states have call predecessors, (49), 8 states have return successors, (48), 12 states have call predecessors, (48), 9 states have call successors, (48) [2024-11-13 23:53:22,221 INFO L276 IsEmpty]: Start isEmpty. Operand 4662 states and 5567 transitions. [2024-11-13 23:53:22,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-13 23:53:22,227 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:53:22,227 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:53:22,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-13 23:53:22,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:53:22,428 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:53:22,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:53:22,428 INFO L85 PathProgramCache]: Analyzing trace with hash -647757153, now seen corresponding path program 1 times [2024-11-13 23:53:22,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:53:22,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826722706] [2024-11-13 23:53:22,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:53:22,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:53:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:53:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2024-11-13 23:53:22,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:53:22,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826722706] [2024-11-13 23:53:22,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826722706] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:53:22,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:53:22,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-13 23:53:22,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265610237] [2024-11-13 23:53:22,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:53:22,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 23:53:22,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:53:22,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 23:53:22,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-13 23:53:22,614 INFO L87 Difference]: Start difference. First operand 4662 states and 5567 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-13 23:53:24,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:53:24,264 INFO L93 Difference]: Finished difference Result 13290 states and 15929 transitions. [2024-11-13 23:53:24,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 23:53:24,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2024-11-13 23:53:24,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:53:24,300 INFO L225 Difference]: With dead ends: 13290 [2024-11-13 23:53:24,300 INFO L226 Difference]: Without dead ends: 8997 [2024-11-13 23:53:24,312 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-13 23:53:24,312 INFO L432 NwaCegarLoop]: 333 mSDtfsCounter, 193 mSDsluCounter, 1461 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1794 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:53:24,313 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 1794 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:53:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8997 states. [2024-11-13 23:53:25,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8997 to 6385. [2024-11-13 23:53:25,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6385 states, 4708 states have (on average 1.187553101104503) internal successors, (5591), 4761 states have internal predecessors, (5591), 1020 states have call successors, (1020), 656 states have call predecessors, (1020), 656 states have return successors, (1020), 967 states have call predecessors, (1020), 1020 states have call successors, (1020) [2024-11-13 23:53:25,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6385 states to 6385 states and 7631 transitions. [2024-11-13 23:53:25,512 INFO L78 Accepts]: Start accepts. Automaton has 6385 states and 7631 transitions. Word has length 145 [2024-11-13 23:53:25,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:53:25,513 INFO L471 AbstractCegarLoop]: Abstraction has 6385 states and 7631 transitions. [2024-11-13 23:53:25,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-13 23:53:25,513 INFO L276 IsEmpty]: Start isEmpty. Operand 6385 states and 7631 transitions. [2024-11-13 23:53:25,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-11-13 23:53:25,521 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:53:25,521 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:53:25,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-11-13 23:53:25,522 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:53:25,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:53:25,522 INFO L85 PathProgramCache]: Analyzing trace with hash 918145324, now seen corresponding path program 1 times [2024-11-13 23:53:25,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:53:25,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582961069] [2024-11-13 23:53:25,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:53:25,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:53:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:53:26,518 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-13 23:53:26,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:53:26,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582961069] [2024-11-13 23:53:26,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582961069] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:53:26,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834358447] [2024-11-13 23:53:26,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:53:26,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:53:26,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:53:26,521 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:53:26,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 23:53:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:53:26,757 INFO L255 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-13 23:53:26,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:53:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 22 proven. 55 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-13 23:53:27,356 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:53:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-13 23:53:27,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834358447] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:53:27,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1026709113] [2024-11-13 23:53:27,818 INFO L159 IcfgInterpreter]: Started Sifa with 80 locations of interest [2024-11-13 23:53:27,820 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:53:27,821 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:53:27,821 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:53:27,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:53:38,757 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 19 for LOIs [2024-11-13 23:53:38,770 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2024-11-13 23:53:38,771 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 44 for LOIs [2024-11-13 23:53:38,820 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 146 for LOIs [2024-11-13 23:53:39,416 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 76 for LOIs [2024-11-13 23:53:39,500 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 20 for LOIs [2024-11-13 23:53:39,510 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:53:56,076 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '232593#(exists ((|v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_33| Int)) (and (<= 0 ~side2Failed_History_0~0) (exists ((|v_ULTIMATE.start_check_~tmp___8~0#1_41| Int) (|v_ULTIMATE.start_check_#t~ret16#1_45| Int)) (and (= ~side2Failed_History_1~0 0) (= |v_ULTIMATE.start_check_#t~ret16#1_45| 0) (exists ((|v_ULTIMATE.start_check_~tmp___7~0#1_54| Int) (|v_ULTIMATE.start_check_#t~ret15#1_64| Int)) (and (not (= |v_ULTIMATE.start_check_#t~ret15#1_64| 0)) (<= |v_ULTIMATE.start_check_#t~ret15#1_64| 1) (= |v_ULTIMATE.start_check_~tmp___7~0#1_54| 1) (<= 0 |v_ULTIMATE.start_check_#t~ret15#1_64|))) (= |v_ULTIMATE.start_check_~tmp___8~0#1_41| 0))) (<= ~active_side_History_0~0 127) (= |assert_#in~arg| 0) (<= ~manual_selection_History_1~0 127) (<= ~active_side_History_1~0 127) (<= ~side2Failed_History_0~0 1) (<= 0 ~side2Failed_History_2~0) (not (= 2 ~active_side_History_0~0)) (<= 0 (+ ~manual_selection_History_1~0 128)) (<= 0 (+ ~active_side_History_1~0 128)) (<= 0 (+ ~active_side_History_0~0 128)) (= |v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_33| 0) (<= ~side2Failed_History_2~0 1)))' at error location [2024-11-13 23:53:56,076 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:53:56,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:53:56,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 10] total 29 [2024-11-13 23:53:56,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934382057] [2024-11-13 23:53:56,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:53:56,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-13 23:53:56,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:53:56,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-13 23:53:56,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=7422, Unknown=0, NotChecked=0, Total=7832 [2024-11-13 23:53:56,079 INFO L87 Difference]: Start difference. First operand 6385 states and 7631 transitions. Second operand has 29 states, 29 states have (on average 7.172413793103448) internal successors, (208), 26 states have internal predecessors, (208), 10 states have call successors, (44), 5 states have call predecessors, (44), 9 states have return successors, (43), 13 states have call predecessors, (43), 10 states have call successors, (43) [2024-11-13 23:54:02,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:54:02,113 INFO L93 Difference]: Finished difference Result 13312 states and 15852 transitions. [2024-11-13 23:54:02,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-13 23:54:02,113 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 7.172413793103448) internal successors, (208), 26 states have internal predecessors, (208), 10 states have call successors, (44), 5 states have call predecessors, (44), 9 states have return successors, (43), 13 states have call predecessors, (43), 10 states have call successors, (43) Word has length 146 [2024-11-13 23:54:02,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:54:02,138 INFO L225 Difference]: With dead ends: 13312 [2024-11-13 23:54:02,138 INFO L226 Difference]: Without dead ends: 7192 [2024-11-13 23:54:02,151 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 358 SyntacticMatches, 10 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5462 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=1036, Invalid=13484, Unknown=0, NotChecked=0, Total=14520 [2024-11-13 23:54:02,152 INFO L432 NwaCegarLoop]: 786 mSDtfsCounter, 1189 mSDsluCounter, 7529 mSDsCounter, 0 mSdLazyCounter, 2983 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 8315 SdHoareTripleChecker+Invalid, 3379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 2983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:54:02,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1189 Valid, 8315 Invalid, 3379 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [396 Valid, 2983 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-13 23:54:02,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7192 states. [2024-11-13 23:54:03,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7192 to 4813. [2024-11-13 23:54:03,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4813 states, 3541 states have (on average 1.1883648686811634) internal successors, (4208), 3583 states have internal predecessors, (4208), 770 states have call successors, (770), 501 states have call predecessors, (770), 501 states have return successors, (770), 728 states have call predecessors, (770), 770 states have call successors, (770) [2024-11-13 23:54:03,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4813 states to 4813 states and 5748 transitions. [2024-11-13 23:54:03,087 INFO L78 Accepts]: Start accepts. Automaton has 4813 states and 5748 transitions. Word has length 146 [2024-11-13 23:54:03,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:54:03,088 INFO L471 AbstractCegarLoop]: Abstraction has 4813 states and 5748 transitions. [2024-11-13 23:54:03,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.172413793103448) internal successors, (208), 26 states have internal predecessors, (208), 10 states have call successors, (44), 5 states have call predecessors, (44), 9 states have return successors, (43), 13 states have call predecessors, (43), 10 states have call successors, (43) [2024-11-13 23:54:03,089 INFO L276 IsEmpty]: Start isEmpty. Operand 4813 states and 5748 transitions. [2024-11-13 23:54:03,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-11-13 23:54:03,093 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:54:03,093 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:54:03,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 23:54:03,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:54:03,298 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:54:03,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:54:03,299 INFO L85 PathProgramCache]: Analyzing trace with hash 380023189, now seen corresponding path program 1 times [2024-11-13 23:54:03,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:54:03,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039686871] [2024-11-13 23:54:03,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:54:03,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:54:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:54:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2024-11-13 23:54:04,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:54:04,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039686871] [2024-11-13 23:54:04,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039686871] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:54:04,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360353154] [2024-11-13 23:54:04,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:54:04,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:54:04,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:54:04,273 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:54:04,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 23:54:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:54:04,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-13 23:54:04,513 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:54:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 70 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-13 23:54:05,673 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:54:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-13 23:54:07,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360353154] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:54:07,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [586488919] [2024-11-13 23:54:07,334 INFO L159 IcfgInterpreter]: Started Sifa with 80 locations of interest [2024-11-13 23:54:07,334 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:54:07,335 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:54:07,335 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:54:07,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:54:27,280 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 19 for LOIs [2024-11-13 23:54:27,301 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2024-11-13 23:54:27,302 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 21 for LOIs [2024-11-13 23:54:27,319 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 142 for LOIs [2024-11-13 23:54:28,172 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 72 for LOIs [2024-11-13 23:54:28,245 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 72 for LOIs [2024-11-13 23:54:28,371 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:54:46,890 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '258457#(exists ((|v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_44| Int)) (and (<= 0 ~side2Failed_History_0~0) (<= ~active_side_History_0~0 127) (= |assert_#in~arg| 0) (<= ~active_side_History_1~0 127) (<= ~side2Failed_History_0~0 1) (<= 0 ~side2Failed_History_2~0) (= |v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_44| 0) (not (= 2 ~active_side_History_0~0)) (exists ((|v_ULTIMATE.start_check_~tmp___8~0#1_48| Int) (|v_ULTIMATE.start_check_#t~ret16#1_53| Int)) (and (= ~side2Failed_History_1~0 0) (= |v_ULTIMATE.start_check_#t~ret16#1_53| 0) (exists ((|v_ULTIMATE.start_check_~tmp___7~0#1_64| Int) (|v_ULTIMATE.start_check_#t~ret15#1_76| Int)) (and (not (= |v_ULTIMATE.start_check_#t~ret15#1_76| 0)) (= |v_ULTIMATE.start_check_~tmp___7~0#1_64| 1) (<= |v_ULTIMATE.start_check_#t~ret15#1_76| 1) (<= 0 |v_ULTIMATE.start_check_#t~ret15#1_76|))) (= |v_ULTIMATE.start_check_~tmp___8~0#1_48| 0))) (<= 0 (+ ~active_side_History_1~0 128)) (<= 0 (+ ~active_side_History_0~0 128)) (<= ~side2Failed_History_2~0 1)))' at error location [2024-11-13 23:54:46,890 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:54:46,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:54:46,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 18] total 35 [2024-11-13 23:54:46,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812931875] [2024-11-13 23:54:46,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:54:46,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-13 23:54:46,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:54:46,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-13 23:54:46,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=8413, Unknown=0, NotChecked=0, Total=8930 [2024-11-13 23:54:46,893 INFO L87 Difference]: Start difference. First operand 4813 states and 5748 transitions. Second operand has 35 states, 35 states have (on average 5.9714285714285715) internal successors, (209), 34 states have internal predecessors, (209), 11 states have call successors, (51), 5 states have call predecessors, (51), 7 states have return successors, (50), 12 states have call predecessors, (50), 11 states have call successors, (50) [2024-11-13 23:54:55,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:54:55,098 INFO L93 Difference]: Finished difference Result 10707 states and 12883 transitions. [2024-11-13 23:54:55,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-13 23:54:55,099 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.9714285714285715) internal successors, (209), 34 states have internal predecessors, (209), 11 states have call successors, (51), 5 states have call predecessors, (51), 7 states have return successors, (50), 12 states have call predecessors, (50), 11 states have call successors, (50) Word has length 147 [2024-11-13 23:54:55,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:54:55,123 INFO L225 Difference]: With dead ends: 10707 [2024-11-13 23:54:55,123 INFO L226 Difference]: Without dead ends: 6142 [2024-11-13 23:54:55,134 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 362 SyntacticMatches, 10 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8756 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=1436, Invalid=21214, Unknown=0, NotChecked=0, Total=22650 [2024-11-13 23:54:55,134 INFO L432 NwaCegarLoop]: 425 mSDtfsCounter, 2067 mSDsluCounter, 5612 mSDsCounter, 0 mSdLazyCounter, 3643 mSolverCounterSat, 786 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2067 SdHoareTripleChecker+Valid, 6037 SdHoareTripleChecker+Invalid, 4429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 3643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-13 23:54:55,134 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2067 Valid, 6037 Invalid, 4429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [786 Valid, 3643 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-13 23:54:55,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6142 states. [2024-11-13 23:54:56,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6142 to 5397. [2024-11-13 23:54:56,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5397 states, 3965 states have (on average 1.1831021437578815) internal successors, (4691), 4013 states have internal predecessors, (4691), 864 states have call successors, (864), 567 states have call predecessors, (864), 567 states have return successors, (864), 816 states have call predecessors, (864), 864 states have call successors, (864) [2024-11-13 23:54:56,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5397 states to 5397 states and 6419 transitions. [2024-11-13 23:54:56,251 INFO L78 Accepts]: Start accepts. Automaton has 5397 states and 6419 transitions. Word has length 147 [2024-11-13 23:54:56,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:54:56,251 INFO L471 AbstractCegarLoop]: Abstraction has 5397 states and 6419 transitions. [2024-11-13 23:54:56,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.9714285714285715) internal successors, (209), 34 states have internal predecessors, (209), 11 states have call successors, (51), 5 states have call predecessors, (51), 7 states have return successors, (50), 12 states have call predecessors, (50), 11 states have call successors, (50) [2024-11-13 23:54:56,251 INFO L276 IsEmpty]: Start isEmpty. Operand 5397 states and 6419 transitions. [2024-11-13 23:54:56,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-13 23:54:56,254 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:54:56,254 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:54:56,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 23:54:56,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:54:56,458 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:54:56,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:54:56,458 INFO L85 PathProgramCache]: Analyzing trace with hash -460751814, now seen corresponding path program 1 times [2024-11-13 23:54:56,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:54:56,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687967406] [2024-11-13 23:54:56,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:54:56,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:54:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:54:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-13 23:54:58,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:54:58,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687967406] [2024-11-13 23:54:58,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687967406] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:54:58,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403981092] [2024-11-13 23:54:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:54:58,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:54:58,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:54:58,091 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:54:58,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 23:54:58,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:54:58,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-13 23:54:58,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:54:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 6 proven. 76 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-13 23:54:59,503 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:55:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-13 23:55:00,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403981092] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:55:00,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1446270645] [2024-11-13 23:55:00,781 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2024-11-13 23:55:00,781 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:55:00,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:55:00,781 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:55:00,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:55:11,789 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 19 for LOIs [2024-11-13 23:55:11,803 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2024-11-13 23:55:11,805 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 21 for LOIs [2024-11-13 23:55:11,819 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 142 for LOIs [2024-11-13 23:55:12,271 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 72 for LOIs [2024-11-13 23:55:12,325 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 72 for LOIs [2024-11-13 23:55:12,450 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:55:31,830 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '281601#(exists ((|v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_53| Int)) (and (<= 0 ~side2Failed_History_0~0) (<= ~active_side_History_0~0 127) (= |assert_#in~arg| 0) (exists ((|v_ULTIMATE.start_check_~tmp___8~0#1_55| Int) (|v_ULTIMATE.start_check_#t~ret16#1_61| Int)) (and (= ~side2Failed_History_1~0 0) (= |v_ULTIMATE.start_check_~tmp___8~0#1_55| 0) (exists ((|v_ULTIMATE.start_check_~tmp___7~0#1_73| Int) (|v_ULTIMATE.start_check_#t~ret15#1_87| Int)) (and (not (= |v_ULTIMATE.start_check_#t~ret15#1_87| 0)) (<= |v_ULTIMATE.start_check_#t~ret15#1_87| 1) (= |v_ULTIMATE.start_check_~tmp___7~0#1_73| 1) (<= 0 |v_ULTIMATE.start_check_#t~ret15#1_87|))) (= |v_ULTIMATE.start_check_#t~ret16#1_61| 0))) (<= ~active_side_History_1~0 127) (<= ~side2Failed_History_0~0 1) (<= 0 ~side2Failed_History_2~0) (= |v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_53| 0) (not (= 2 ~active_side_History_0~0)) (<= 0 (+ ~active_side_History_1~0 128)) (<= 0 (+ ~active_side_History_0~0 128)) (<= ~side2Failed_History_2~0 1)))' at error location [2024-11-13 23:55:31,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:55:31,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:55:31,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 39 [2024-11-13 23:55:31,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966170885] [2024-11-13 23:55:31,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:55:31,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-13 23:55:31,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:55:31,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-13 23:55:31,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=9556, Unknown=0, NotChecked=0, Total=10100 [2024-11-13 23:55:31,833 INFO L87 Difference]: Start difference. First operand 5397 states and 6419 transitions. Second operand has 39 states, 39 states have (on average 5.666666666666667) internal successors, (221), 38 states have internal predecessors, (221), 13 states have call successors, (47), 7 states have call predecessors, (47), 10 states have return successors, (47), 13 states have call predecessors, (47), 12 states have call successors, (47) [2024-11-13 23:55:44,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:55:44,820 INFO L93 Difference]: Finished difference Result 15766 states and 18732 transitions. [2024-11-13 23:55:44,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2024-11-13 23:55:44,821 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.666666666666667) internal successors, (221), 38 states have internal predecessors, (221), 13 states have call successors, (47), 7 states have call predecessors, (47), 10 states have return successors, (47), 13 states have call predecessors, (47), 12 states have call successors, (47) Word has length 149 [2024-11-13 23:55:44,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:55:44,852 INFO L225 Difference]: With dead ends: 15766 [2024-11-13 23:55:44,852 INFO L226 Difference]: Without dead ends: 10617 [2024-11-13 23:55:44,863 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 384 SyntacticMatches, 10 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24082 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=4072, Invalid=55708, Unknown=0, NotChecked=0, Total=59780 [2024-11-13 23:55:44,864 INFO L432 NwaCegarLoop]: 525 mSDtfsCounter, 3149 mSDsluCounter, 7629 mSDsCounter, 0 mSdLazyCounter, 5978 mSolverCounterSat, 1093 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3154 SdHoareTripleChecker+Valid, 8154 SdHoareTripleChecker+Invalid, 7071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1093 IncrementalHoareTripleChecker+Valid, 5978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-13 23:55:44,864 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3154 Valid, 8154 Invalid, 7071 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1093 Valid, 5978 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-11-13 23:55:44,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10617 states. [2024-11-13 23:55:46,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10617 to 6860. [2024-11-13 23:55:46,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6860 states, 5061 states have (on average 1.1780280576961075) internal successors, (5962), 5118 states have internal predecessors, (5962), 1078 states have call successors, (1078), 720 states have call predecessors, (1078), 720 states have return successors, (1078), 1021 states have call predecessors, (1078), 1078 states have call successors, (1078) [2024-11-13 23:55:46,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6860 states to 6860 states and 8118 transitions. [2024-11-13 23:55:46,391 INFO L78 Accepts]: Start accepts. Automaton has 6860 states and 8118 transitions. Word has length 149 [2024-11-13 23:55:46,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:55:46,391 INFO L471 AbstractCegarLoop]: Abstraction has 6860 states and 8118 transitions. [2024-11-13 23:55:46,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.666666666666667) internal successors, (221), 38 states have internal predecessors, (221), 13 states have call successors, (47), 7 states have call predecessors, (47), 10 states have return successors, (47), 13 states have call predecessors, (47), 12 states have call successors, (47) [2024-11-13 23:55:46,392 INFO L276 IsEmpty]: Start isEmpty. Operand 6860 states and 8118 transitions. [2024-11-13 23:55:46,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-13 23:55:46,394 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:55:46,394 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:55:46,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 23:55:46,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:55:46,595 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:55:46,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:55:46,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1710148969, now seen corresponding path program 1 times [2024-11-13 23:55:46,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:55:46,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592496987] [2024-11-13 23:55:46,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:55:46,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:55:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:55:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-13 23:55:46,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:55:46,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592496987] [2024-11-13 23:55:46,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592496987] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:55:46,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:55:46,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-13 23:55:46,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040132192] [2024-11-13 23:55:46,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:55:46,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 23:55:46,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:55:46,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 23:55:46,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-13 23:55:46,783 INFO L87 Difference]: Start difference. First operand 6860 states and 8118 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-13 23:55:49,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:55:49,310 INFO L93 Difference]: Finished difference Result 17643 states and 20910 transitions. [2024-11-13 23:55:49,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 23:55:49,311 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 152 [2024-11-13 23:55:49,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:55:49,338 INFO L225 Difference]: With dead ends: 17643 [2024-11-13 23:55:49,338 INFO L226 Difference]: Without dead ends: 11058 [2024-11-13 23:55:49,348 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-13 23:55:49,348 INFO L432 NwaCegarLoop]: 395 mSDtfsCounter, 190 mSDsluCounter, 1701 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 2096 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:55:49,349 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 2096 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:55:49,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11058 states. [2024-11-13 23:55:51,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11058 to 9600. [2024-11-13 23:55:51,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9600 states, 7038 states have (on average 1.1712134129013925) internal successors, (8243), 7121 states have internal predecessors, (8243), 1539 states have call successors, (1539), 1022 states have call predecessors, (1539), 1022 states have return successors, (1539), 1456 states have call predecessors, (1539), 1539 states have call successors, (1539) [2024-11-13 23:55:51,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9600 states to 9600 states and 11321 transitions. [2024-11-13 23:55:51,206 INFO L78 Accepts]: Start accepts. Automaton has 9600 states and 11321 transitions. Word has length 152 [2024-11-13 23:55:51,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:55:51,207 INFO L471 AbstractCegarLoop]: Abstraction has 9600 states and 11321 transitions. [2024-11-13 23:55:51,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-13 23:55:51,207 INFO L276 IsEmpty]: Start isEmpty. Operand 9600 states and 11321 transitions. [2024-11-13 23:55:51,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-11-13 23:55:51,210 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:55:51,210 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 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, 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] [2024-11-13 23:55:51,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-11-13 23:55:51,210 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:55:51,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:55:51,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1185947643, now seen corresponding path program 1 times [2024-11-13 23:55:51,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:55:51,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811300395] [2024-11-13 23:55:51,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:55:51,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:55:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:55:51,537 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-13 23:55:51,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:55:51,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811300395] [2024-11-13 23:55:51,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811300395] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:55:51,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073815602] [2024-11-13 23:55:51,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:55:51,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:55:51,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:55:51,540 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:55:51,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ca4514-503e-4bbd-97fc-59f5b0af4cd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 23:55:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:55:51,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 23:55:51,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:55:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 83 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-13 23:55:52,033 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:55:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-13 23:55:52,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073815602] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:55:52,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1963155328] [2024-11-13 23:55:52,265 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2024-11-13 23:55:52,265 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:55:52,266 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:55:52,266 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:55:52,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs