./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array22_pattern.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_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/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_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array22_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/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_d9c4d4cd-0d22-407c-8011-343698bb91ac/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 31d323b6985f030ac0fb5fda45d0cb8af14c3bb3898c8ff09cf5a292e40f357b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 05:49:18,855 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 05:49:18,956 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 05:49:18,963 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 05:49:18,964 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 05:49:19,002 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 05:49:19,003 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 05:49:19,003 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 05:49:19,003 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 05:49:19,004 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 05:49:19,004 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 05:49:19,004 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 05:49:19,004 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 05:49:19,004 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 05:49:19,004 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 05:49:19,004 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 05:49:19,004 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 05:49:19,004 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 05:49:19,005 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 05:49:19,005 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 05:49:19,005 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 05:49:19,005 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 05:49:19,005 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 05:49:19,006 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 05:49:19,006 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 05:49:19,006 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 05:49:19,006 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 05:49:19,006 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 05:49:19,008 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 05:49:19,008 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 05:49:19,008 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 05:49:19,008 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 05:49:19,008 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 05:49:19,008 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 05:49:19,009 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 05:49:19,009 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 05:49:19,009 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 05:49:19,009 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 05:49:19,009 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:49:19,009 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 05:49:19,009 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 05:49:19,009 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 05:49:19,010 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 05:49:19,010 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 05:49:19,010 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 05:49:19,010 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 05:49:19,010 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 05:49:19,010 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_d9c4d4cd-0d22-407c-8011-343698bb91ac/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 -> 31d323b6985f030ac0fb5fda45d0cb8af14c3bb3898c8ff09cf5a292e40f357b [2024-11-14 05:49:19,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 05:49:19,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 05:49:19,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 05:49:19,319 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 05:49:19,319 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 05:49:19,320 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-patterns/array22_pattern.c Unable to find full path for "g++" [2024-11-14 05:49:21,333 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 05:49:21,629 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 05:49:21,632 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/sv-benchmarks/c/array-patterns/array22_pattern.c [2024-11-14 05:49:21,642 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/data/ad719dad6/a870268d830b4bcbaf58d021d9fb4439/FLAGcc2c54782 [2024-11-14 05:49:21,666 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/data/ad719dad6/a870268d830b4bcbaf58d021d9fb4439 [2024-11-14 05:49:21,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 05:49:21,673 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 05:49:21,674 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 05:49:21,674 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 05:49:21,680 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 05:49:21,681 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:49:21" (1/1) ... [2024-11-14 05:49:21,682 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aa1a934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:49:21, skipping insertion in model container [2024-11-14 05:49:21,682 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:49:21" (1/1) ... [2024-11-14 05:49:21,705 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 05:49:21,874 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_d9c4d4cd-0d22-407c-8011-343698bb91ac/sv-benchmarks/c/array-patterns/array22_pattern.c[1347,1360] [2024-11-14 05:49:21,918 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:49:21,928 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 05:49:21,940 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_d9c4d4cd-0d22-407c-8011-343698bb91ac/sv-benchmarks/c/array-patterns/array22_pattern.c[1347,1360] [2024-11-14 05:49:21,968 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:49:21,988 INFO L204 MainTranslator]: Completed translation [2024-11-14 05:49:21,989 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:49:21 WrapperNode [2024-11-14 05:49:21,990 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 05:49:21,991 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 05:49:21,991 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 05:49:21,992 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 05:49:21,999 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:49:21" (1/1) ... [2024-11-14 05:49:22,006 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:49:21" (1/1) ... [2024-11-14 05:49:22,034 INFO L138 Inliner]: procedures = 17, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 105 [2024-11-14 05:49:22,035 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 05:49:22,035 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 05:49:22,035 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 05:49:22,035 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 05:49:22,045 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:49:21" (1/1) ... [2024-11-14 05:49:22,045 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:49:21" (1/1) ... [2024-11-14 05:49:22,049 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:49:21" (1/1) ... [2024-11-14 05:49:22,049 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:49:21" (1/1) ... [2024-11-14 05:49:22,056 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:49:21" (1/1) ... [2024-11-14 05:49:22,064 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:49:21" (1/1) ... [2024-11-14 05:49:22,068 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:49:21" (1/1) ... [2024-11-14 05:49:22,069 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:49:21" (1/1) ... [2024-11-14 05:49:22,071 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 05:49:22,072 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 05:49:22,076 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 05:49:22,076 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 05:49:22,077 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:49:21" (1/1) ... [2024-11-14 05:49:22,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:49:22,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:49:22,116 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 05:49:22,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 05:49:22,147 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2024-11-14 05:49:22,147 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2024-11-14 05:49:22,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 05:49:22,148 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-14 05:49:22,148 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-14 05:49:22,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 05:49:22,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 05:49:22,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 05:49:22,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 05:49:22,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 05:49:22,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 05:49:22,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 05:49:22,242 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 05:49:22,245 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 05:49:22,474 INFO L? ?]: Removed 25 outVars from TransFormulas that were not future-live. [2024-11-14 05:49:22,474 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 05:49:22,597 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 05:49:22,598 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-14 05:49:22,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:49:22 BoogieIcfgContainer [2024-11-14 05:49:22,598 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 05:49:22,601 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 05:49:22,601 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 05:49:22,607 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 05:49:22,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 05:49:21" (1/3) ... [2024-11-14 05:49:22,608 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11867d4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:49:22, skipping insertion in model container [2024-11-14 05:49:22,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:49:21" (2/3) ... [2024-11-14 05:49:22,608 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11867d4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:49:22, skipping insertion in model container [2024-11-14 05:49:22,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:49:22" (3/3) ... [2024-11-14 05:49:22,610 INFO L112 eAbstractionObserver]: Analyzing ICFG array22_pattern.c [2024-11-14 05:49:22,629 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 05:49:22,632 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG array22_pattern.c that has 3 procedures, 25 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2024-11-14 05:49:22,689 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 05:49:22,703 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;@717779de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 05:49:22,703 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 05:49:22,707 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 05:49:22,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 05:49:22,715 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:49:22,716 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:49:22,717 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:49:22,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:49:22,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1966802634, now seen corresponding path program 1 times [2024-11-14 05:49:22,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:49:22,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500397279] [2024-11-14 05:49:22,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:49:22,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:49:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:49:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:49:22,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:49:22,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500397279] [2024-11-14 05:49:22,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500397279] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:49:22,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:49:22,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 05:49:22,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938537256] [2024-11-14 05:49:22,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:49:22,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-14 05:49:22,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:49:22,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-14 05:49:22,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 05:49:22,939 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 05:49:22,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:49:22,989 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2024-11-14 05:49:22,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-14 05:49:22,992 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-11-14 05:49:22,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:49:23,002 INFO L225 Difference]: With dead ends: 33 [2024-11-14 05:49:23,002 INFO L226 Difference]: Without dead ends: 23 [2024-11-14 05:49:23,005 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 05:49:23,009 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:49:23,010 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:49:23,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-14 05:49:23,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-14 05:49:23,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 05:49:23,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2024-11-14 05:49:23,047 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 11 [2024-11-14 05:49:23,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:49:23,049 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2024-11-14 05:49:23,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 05:49:23,049 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2024-11-14 05:49:23,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 05:49:23,051 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:49:23,051 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:49:23,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 05:49:23,052 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:49:23,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:49:23,053 INFO L85 PathProgramCache]: Analyzing trace with hash 413866603, now seen corresponding path program 1 times [2024-11-14 05:49:23,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:49:23,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835323526] [2024-11-14 05:49:23,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:49:23,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:49:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:49:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 05:49:23,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:49:23,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835323526] [2024-11-14 05:49:23,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835323526] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:49:23,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:49:23,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 05:49:23,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86335573] [2024-11-14 05:49:23,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:49:23,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:49:23,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:49:23,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:49:23,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:49:23,495 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 05:49:23,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:49:23,562 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2024-11-14 05:49:23,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:49:23,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2024-11-14 05:49:23,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:49:23,564 INFO L225 Difference]: With dead ends: 28 [2024-11-14 05:49:23,564 INFO L226 Difference]: Without dead ends: 25 [2024-11-14 05:49:23,564 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:49:23,565 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:49:23,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 48 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:49:23,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-14 05:49:23,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-14 05:49:23,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 05:49:23,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2024-11-14 05:49:23,578 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 26 [2024-11-14 05:49:23,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:49:23,578 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2024-11-14 05:49:23,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 05:49:23,579 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2024-11-14 05:49:23,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-14 05:49:23,580 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:49:23,580 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:49:23,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 05:49:23,580 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:49:23,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:49:23,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1131275090, now seen corresponding path program 1 times [2024-11-14 05:49:23,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:49:23,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429295095] [2024-11-14 05:49:23,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:49:23,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:49:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:49:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 05:49:23,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:49:23,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429295095] [2024-11-14 05:49:23,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429295095] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:49:23,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:49:23,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:49:23,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255154325] [2024-11-14 05:49:23,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:49:23,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:49:23,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:49:23,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:49:23,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:49:23,827 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 05:49:23,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:49:23,983 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2024-11-14 05:49:23,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:49:23,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2024-11-14 05:49:23,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:49:23,985 INFO L225 Difference]: With dead ends: 51 [2024-11-14 05:49:23,985 INFO L226 Difference]: Without dead ends: 30 [2024-11-14 05:49:23,986 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 [2024-11-14 05:49:23,987 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:49:23,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 45 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:49:23,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-14 05:49:23,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2024-11-14 05:49:23,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 05:49:24,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2024-11-14 05:49:24,000 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 29 [2024-11-14 05:49:24,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:49:24,000 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2024-11-14 05:49:24,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 05:49:24,001 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2024-11-14 05:49:24,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-14 05:49:24,001 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:49:24,001 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:49:24,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 05:49:24,002 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:49:24,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:49:24,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1757652080, now seen corresponding path program 1 times [2024-11-14 05:49:24,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:49:24,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672950993] [2024-11-14 05:49:24,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:49:24,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:49:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:49:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 05:49:24,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:49:24,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672950993] [2024-11-14 05:49:24,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672950993] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:49:24,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:49:24,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 05:49:24,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665449178] [2024-11-14 05:49:24,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:49:24,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:49:24,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:49:24,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:49:24,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:49:24,206 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 05:49:24,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:49:24,290 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2024-11-14 05:49:24,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:49:24,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2024-11-14 05:49:24,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:49:24,291 INFO L225 Difference]: With dead ends: 51 [2024-11-14 05:49:24,291 INFO L226 Difference]: Without dead ends: 29 [2024-11-14 05:49:24,292 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:49:24,293 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:49:24,293 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 44 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:49:24,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-14 05:49:24,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-11-14 05:49:24,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 05:49:24,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-14 05:49:24,305 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 31 [2024-11-14 05:49:24,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:49:24,306 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-14 05:49:24,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 05:49:24,307 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-14 05:49:24,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 05:49:24,308 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:49:24,309 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:49:24,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 05:49:24,309 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:49:24,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:49:24,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1725411946, now seen corresponding path program 1 times [2024-11-14 05:49:24,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:49:24,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123649832] [2024-11-14 05:49:24,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:49:24,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:49:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:49:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 05:49:24,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:49:24,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123649832] [2024-11-14 05:49:24,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123649832] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:49:24,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041509281] [2024-11-14 05:49:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:49:24,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:49:24,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:49:24,563 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:49:24,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 05:49:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:49:24,673 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 05:49:24,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:49:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:49:24,792 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:49:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 05:49:24,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041509281] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:49:24,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [823960232] [2024-11-14 05:49:24,956 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 05:49:24,956 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:49:24,960 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:49:24,965 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:49:24,966 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:49:27,985 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-14 05:49:27,987 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 120 for LOIs [2024-11-14 05:49:28,219 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:49:31,507 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '476#true' at error location [2024-11-14 05:49:31,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:49:31,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:49:31,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-14 05:49:31,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145110624] [2024-11-14 05:49:31,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:49:31,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 05:49:31,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:49:31,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 05:49:31,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=535, Unknown=25, NotChecked=0, Total=650 [2024-11-14 05:49:31,510 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 10 states, 8 states have (on average 3.5) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-14 05:49:31,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:49:31,673 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2024-11-14 05:49:31,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 05:49:31,674 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.5) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 32 [2024-11-14 05:49:31,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:49:31,675 INFO L225 Difference]: With dead ends: 55 [2024-11-14 05:49:31,675 INFO L226 Difference]: Without dead ends: 33 [2024-11-14 05:49:31,688 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=95, Invalid=581, Unknown=26, NotChecked=0, Total=702 [2024-11-14 05:49:31,689 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:49:31,689 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 41 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:49:31,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-14 05:49:31,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2024-11-14 05:49:31,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 05:49:31,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-11-14 05:49:31,698 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 32 [2024-11-14 05:49:31,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:49:31,698 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-11-14 05:49:31,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.5) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-14 05:49:31,698 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-11-14 05:49:31,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 05:49:31,699 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:49:31,699 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 05:49:31,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 05:49:31,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:49:31,902 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:49:31,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:49:31,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1076447757, now seen corresponding path program 2 times [2024-11-14 05:49:31,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:49:31,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460339231] [2024-11-14 05:49:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:49:31,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:49:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:49:32,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 05:49:32,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:49:32,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460339231] [2024-11-14 05:49:32,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460339231] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:49:32,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020801525] [2024-11-14 05:49:32,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:49:32,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:49:32,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:49:32,062 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:49:32,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 05:49:32,142 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 05:49:32,142 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:49:32,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 05:49:32,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:49:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 05:49:32,328 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:49:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 05:49:32,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020801525] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:49:32,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1610264644] [2024-11-14 05:49:32,549 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 05:49:32,550 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:49:32,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:49:32,550 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:49:32,550 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:49:34,158 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-14 05:49:34,160 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 118 for LOIs [2024-11-14 05:49:34,216 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:49:36,903 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '837#true' at error location [2024-11-14 05:49:36,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:49:36,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:49:36,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2024-11-14 05:49:36,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914936796] [2024-11-14 05:49:36,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:49:36,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 05:49:36,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:49:36,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 05:49:36,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=881, Unknown=28, NotChecked=0, Total=1056 [2024-11-14 05:49:36,907 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 17 states, 13 states have (on average 4.0) internal successors, (52), 17 states have internal predecessors, (52), 5 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-14 05:49:37,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:49:37,180 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2024-11-14 05:49:37,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 05:49:37,180 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 4.0) internal successors, (52), 17 states have internal predecessors, (52), 5 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 34 [2024-11-14 05:49:37,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:49:37,181 INFO L225 Difference]: With dead ends: 66 [2024-11-14 05:49:37,181 INFO L226 Difference]: Without dead ends: 45 [2024-11-14 05:49:37,182 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=185, Invalid=1043, Unknown=32, NotChecked=0, Total=1260 [2024-11-14 05:49:37,183 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:49:37,183 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 37 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:49:37,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-14 05:49:37,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2024-11-14 05:49:37,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 05:49:37,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2024-11-14 05:49:37,191 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 34 [2024-11-14 05:49:37,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:49:37,191 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2024-11-14 05:49:37,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 4.0) internal successors, (52), 17 states have internal predecessors, (52), 5 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-14 05:49:37,192 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2024-11-14 05:49:37,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 05:49:37,193 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:49:37,193 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 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] [2024-11-14 05:49:37,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 05:49:37,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:49:37,393 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:49:37,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:49:37,394 INFO L85 PathProgramCache]: Analyzing trace with hash 525298555, now seen corresponding path program 3 times [2024-11-14 05:49:37,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:49:37,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343081387] [2024-11-14 05:49:37,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:49:37,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:49:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:49:37,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900328980] [2024-11-14 05:49:37,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:49:37,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:49:37,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:49:37,457 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:49:37,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 05:49:38,294 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:49:38,294 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:49:38,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-14 05:49:38,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:49:38,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:49:38,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-14 05:49:38,617 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:49:38,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-14 05:49:38,689 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:49:38,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-11-14 05:49:39,860 INFO L349 Elim1Store]: treesize reduction 208, result has 33.5 percent of original size [2024-11-14 05:49:39,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 74 treesize of output 142 [2024-11-14 05:49:41,170 INFO L349 Elim1Store]: treesize reduction 96, result has 41.8 percent of original size [2024-11-14 05:49:41,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 265 treesize of output 279 [2024-11-14 05:49:42,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:49:42,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:49:42,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:49:42,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:49:42,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:49:42,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:49:42,179 INFO L349 Elim1Store]: treesize reduction 212, result has 0.5 percent of original size [2024-11-14 05:49:42,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 126 treesize of output 223 [2024-11-14 05:49:42,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:49:42,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:49:42,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:49:42,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:49:42,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:49:42,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:49:42,345 INFO L349 Elim1Store]: treesize reduction 144, result has 37.1 percent of original size [2024-11-14 05:49:42,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 137 treesize of output 171 [2024-11-14 05:49:44,417 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:49:44,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 68 [2024-11-14 05:49:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:49:44,475 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:50:12,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:50:12,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343081387] [2024-11-14 05:50:12,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:50:12,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900328980] [2024-11-14 05:50:12,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900328980] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:50:12,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [471764563] [2024-11-14 05:50:12,693 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 05:50:12,693 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:50:12,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:50:12,694 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:50:12,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:50:13,432 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-14 05:50:13,433 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 46 for LOIs [2024-11-14 05:50:13,440 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:50:26,343 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1259#true' at error location [2024-11-14 05:50:26,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:50:26,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:50:26,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2024-11-14 05:50:26,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479262881] [2024-11-14 05:50:26,344 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 05:50:26,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-14 05:50:26,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:50:26,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-14 05:50:26,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=3545, Unknown=58, NotChecked=0, Total=3906 [2024-11-14 05:50:26,347 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 33 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 26 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 05:50:28,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:50:28,056 INFO L93 Difference]: Finished difference Result 105 states and 131 transitions. [2024-11-14 05:50:28,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-14 05:50:28,058 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 26 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2024-11-14 05:50:28,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:50:28,059 INFO L225 Difference]: With dead ends: 105 [2024-11-14 05:50:28,059 INFO L226 Difference]: Without dead ends: 75 [2024-11-14 05:50:28,060 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=332, Invalid=3770, Unknown=58, NotChecked=0, Total=4160 [2024-11-14 05:50:28,061 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:50:28,065 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 137 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 05:50:28,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-14 05:50:28,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2024-11-14 05:50:28,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 52 states have internal predecessors, (64), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-14 05:50:28,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2024-11-14 05:50:28,096 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 42 [2024-11-14 05:50:28,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:50:28,097 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2024-11-14 05:50:28,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 26 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 05:50:28,097 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2024-11-14 05:50:28,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-14 05:50:28,099 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:50:28,100 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 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] [2024-11-14 05:50:28,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 05:50:28,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:28,300 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:50:28,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:50:28,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1269797260, now seen corresponding path program 4 times [2024-11-14 05:50:28,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:50:28,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105349331] [2024-11-14 05:50:28,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:28,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:50:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:28,550 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 05:50:28,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:50:28,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105349331] [2024-11-14 05:50:28,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105349331] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:50:28,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632837948] [2024-11-14 05:50:28,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:50:28,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:28,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:50:28,553 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:50:28,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 05:50:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:28,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 05:50:28,651 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:50:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 05:50:28,758 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:50:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 05:50:28,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632837948] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:50:28,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1011635531] [2024-11-14 05:50:28,845 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 05:50:28,846 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:50:28,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:50:28,846 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:50:28,846 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:50:29,901 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-14 05:50:29,903 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 118 for LOIs [2024-11-14 05:50:30,090 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:50:34,954 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1826#true' at error location [2024-11-14 05:50:34,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:50:34,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:50:34,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-14 05:50:34,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690427969] [2024-11-14 05:50:34,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:50:34,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 05:50:34,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:50:34,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 05:50:34,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=809, Unknown=24, NotChecked=0, Total=930 [2024-11-14 05:50:34,956 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 05:50:35,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:50:35,170 INFO L93 Difference]: Finished difference Result 154 states and 190 transitions. [2024-11-14 05:50:35,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 05:50:35,171 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 43 [2024-11-14 05:50:35,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:50:35,172 INFO L225 Difference]: With dead ends: 154 [2024-11-14 05:50:35,172 INFO L226 Difference]: Without dead ends: 100 [2024-11-14 05:50:35,173 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 102 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=116, Invalid=916, Unknown=24, NotChecked=0, Total=1056 [2024-11-14 05:50:35,173 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:50:35,174 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 62 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:50:35,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-14 05:50:35,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2024-11-14 05:50:35,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 71 states have internal predecessors, (86), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-14 05:50:35,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2024-11-14 05:50:35,198 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 43 [2024-11-14 05:50:35,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:50:35,198 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2024-11-14 05:50:35,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 05:50:35,198 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2024-11-14 05:50:35,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-14 05:50:35,199 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:50:35,199 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 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] [2024-11-14 05:50:35,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 05:50:35,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 05:50:35,400 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:50:35,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:50:35,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1761745333, now seen corresponding path program 5 times [2024-11-14 05:50:35,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:50:35,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102906306] [2024-11-14 05:50:35,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:35,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:50:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 05:50:35,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:50:35,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102906306] [2024-11-14 05:50:35,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102906306] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:50:35,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556588903] [2024-11-14 05:50:35,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:50:35,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:35,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:50:35,634 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:50:35,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 05:50:36,103 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-14 05:50:36,104 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:50:36,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 05:50:36,107 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:50:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 05:50:36,219 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:50:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 05:50:36,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556588903] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:50:36,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [327260189] [2024-11-14 05:50:36,339 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 05:50:36,339 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:50:36,339 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:50:36,339 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:50:36,340 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:50:37,327 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-14 05:50:37,328 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 118 for LOIs [2024-11-14 05:50:37,581 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:50:40,214 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2559#true' at error location [2024-11-14 05:50:40,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:50:40,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:50:40,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-11-14 05:50:40,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599526644] [2024-11-14 05:50:40,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:50:40,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 05:50:40,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:50:40,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 05:50:40,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=930, Unknown=27, NotChecked=0, Total=1056 [2024-11-14 05:50:40,216 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-14 05:50:41,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:50:41,432 INFO L93 Difference]: Finished difference Result 130 states and 156 transitions. [2024-11-14 05:50:41,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-14 05:50:41,432 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 43 [2024-11-14 05:50:41,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:50:41,433 INFO L225 Difference]: With dead ends: 130 [2024-11-14 05:50:41,433 INFO L226 Difference]: Without dead ends: 101 [2024-11-14 05:50:41,434 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=338, Invalid=2271, Unknown=43, NotChecked=0, Total=2652 [2024-11-14 05:50:41,435 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:50:41,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 229 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:50:41,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-14 05:50:41,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2024-11-14 05:50:41,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 72 states have internal predecessors, (84), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-14 05:50:41,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 110 transitions. [2024-11-14 05:50:41,462 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 110 transitions. Word has length 43 [2024-11-14 05:50:41,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:50:41,462 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 110 transitions. [2024-11-14 05:50:41,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-14 05:50:41,462 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 110 transitions. [2024-11-14 05:50:41,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 05:50:41,463 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:50:41,463 INFO L215 NwaCegarLoop]: trace histogram [6, 4, 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] [2024-11-14 05:50:41,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 05:50:41,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:41,668 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:50:41,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:50:41,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1300129727, now seen corresponding path program 6 times [2024-11-14 05:50:41,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:50:41,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668938780] [2024-11-14 05:50:41,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:41,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:50:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:41,899 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 23 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 05:50:41,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:50:41,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668938780] [2024-11-14 05:50:41,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668938780] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:50:41,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114266597] [2024-11-14 05:50:41,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:50:41,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:41,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:50:41,902 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:50:41,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 05:50:41,994 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:50:41,994 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:50:41,997 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 05:50:41,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:50:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 39 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 05:50:42,121 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:50:42,219 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 05:50:42,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114266597] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:50:42,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [284700566] [2024-11-14 05:50:42,221 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 05:50:42,221 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:50:42,221 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:50:42,221 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:50:42,221 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:50:43,103 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-14 05:50:43,104 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 118 for LOIs [2024-11-14 05:50:43,131 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:50:46,380 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3286#true' at error location [2024-11-14 05:50:46,381 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:50:46,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:50:46,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-14 05:50:46,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118198721] [2024-11-14 05:50:46,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:50:46,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 05:50:46,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:50:46,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 05:50:46,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=812, Unknown=25, NotChecked=0, Total=930 [2024-11-14 05:50:46,382 INFO L87 Difference]: Start difference. First operand 94 states and 110 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 05:50:46,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:50:46,837 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2024-11-14 05:50:46,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 05:50:46,837 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 46 [2024-11-14 05:50:46,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:50:46,838 INFO L225 Difference]: With dead ends: 109 [2024-11-14 05:50:46,838 INFO L226 Difference]: Without dead ends: 92 [2024-11-14 05:50:46,840 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 111 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=183, Invalid=1352, Unknown=25, NotChecked=0, Total=1560 [2024-11-14 05:50:46,841 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:50:46,841 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 85 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:50:46,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-14 05:50:46,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2024-11-14 05:50:46,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 67 states have internal predecessors, (77), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-14 05:50:46,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2024-11-14 05:50:46,866 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 46 [2024-11-14 05:50:46,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:50:46,866 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2024-11-14 05:50:46,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 05:50:46,866 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2024-11-14 05:50:46,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-14 05:50:46,868 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:50:46,868 INFO L215 NwaCegarLoop]: trace histogram [9, 6, 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] [2024-11-14 05:50:46,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 05:50:47,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 05:50:47,068 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:50:47,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:50:47,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1879783086, now seen corresponding path program 7 times [2024-11-14 05:50:47,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:50:47,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792066894] [2024-11-14 05:50:47,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:47,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:50:47,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2024-11-14 05:50:47,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:50:47,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792066894] [2024-11-14 05:50:47,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792066894] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:50:47,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006880857] [2024-11-14 05:50:47,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:50:47,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:47,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:50:47,291 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:50:47,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 05:50:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:47,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 05:50:47,404 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:50:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-11-14 05:50:47,555 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:50:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2024-11-14 05:50:47,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006880857] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:50:47,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1387385037] [2024-11-14 05:50:47,696 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 05:50:47,697 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:50:47,697 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:50:47,698 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:50:47,698 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:50:48,530 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-14 05:50:48,532 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 118 for LOIs [2024-11-14 05:50:48,660 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:50:51,941 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3962#true' at error location [2024-11-14 05:50:51,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:50:51,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:50:51,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-11-14 05:50:51,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841744609] [2024-11-14 05:50:51,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:50:51,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 05:50:51,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:50:51,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 05:50:51,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1158, Unknown=38, NotChecked=0, Total=1332 [2024-11-14 05:50:51,943 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 05:50:52,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:50:52,410 INFO L93 Difference]: Finished difference Result 134 states and 158 transitions. [2024-11-14 05:50:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 05:50:52,410 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 51 [2024-11-14 05:50:52,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:50:52,411 INFO L225 Difference]: With dead ends: 134 [2024-11-14 05:50:52,411 INFO L226 Difference]: Without dead ends: 102 [2024-11-14 05:50:52,412 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=190, Invalid=1406, Unknown=44, NotChecked=0, Total=1640 [2024-11-14 05:50:52,412 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:50:52,413 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 173 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:50:52,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-14 05:50:52,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2024-11-14 05:50:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 72 states have internal predecessors, (83), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-14 05:50:52,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2024-11-14 05:50:52,432 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 51 [2024-11-14 05:50:52,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:50:52,432 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2024-11-14 05:50:52,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 05:50:52,432 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2024-11-14 05:50:52,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-14 05:50:52,433 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:50:52,433 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 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] [2024-11-14 05:50:52,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 05:50:52,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 05:50:52,636 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:50:52,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:50:52,636 INFO L85 PathProgramCache]: Analyzing trace with hash -161034797, now seen corresponding path program 1 times [2024-11-14 05:50:52,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:50:52,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352300341] [2024-11-14 05:50:52,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:52,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:50:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:50:52,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822005737] [2024-11-14 05:50:52,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:52,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:52,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:50:52,700 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:50:52,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c4d4cd-0d22-407c-8011-343698bb91ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 05:50:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:56,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-14 05:50:56,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:50:56,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:50:57,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-14 05:50:57,189 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:50:57,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-14 05:50:57,262 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:50:57,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-11-14 05:50:58,242 INFO L349 Elim1Store]: treesize reduction 208, result has 33.5 percent of original size [2024-11-14 05:50:58,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 74 treesize of output 142 [2024-11-14 05:50:59,497 INFO L349 Elim1Store]: treesize reduction 96, result has 41.8 percent of original size [2024-11-14 05:50:59,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 265 treesize of output 279 [2024-11-14 05:51:00,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:51:00,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:51:00,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:51:00,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:51:00,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:51:00,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:51:00,626 INFO L349 Elim1Store]: treesize reduction 212, result has 0.5 percent of original size [2024-11-14 05:51:00,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 126 treesize of output 223 [2024-11-14 05:51:00,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:51:00,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:51:00,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:51:00,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:51:00,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:51:00,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:51:00,779 INFO L349 Elim1Store]: treesize reduction 144, result has 37.1 percent of original size [2024-11-14 05:51:00,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 137 treesize of output 171 [2024-11-14 05:51:05,100 INFO L349 Elim1Store]: treesize reduction 848, result has 34.2 percent of original size [2024-11-14 05:51:05,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 21 select indices, 21 select index equivalence classes, 6 disjoint index pairs (out of 210 index pairs), introduced 21 new quantified variables, introduced 231 case distinctions, treesize of input 300 treesize of output 601 [2024-11-14 05:52:30,195 INFO L349 Elim1Store]: treesize reduction 896, result has 21.1 percent of original size [2024-11-14 05:52:30,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 119 case distinctions, treesize of input 938 treesize of output 980 [2024-11-14 05:53:05,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:53:05,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:53:06,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:53:06,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:53:06,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:53:06,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:53:07,334 INFO L349 Elim1Store]: treesize reduction 1017, result has 22.5 percent of original size [2024-11-14 05:53:07,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 10 select indices, 10 select index equivalence classes, 13 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 53 case distinctions, treesize of input 1321 treesize of output 1571 [2024-11-14 05:54:34,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:54:34,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:54:34,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:54:34,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:54:34,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:54:34,282 INFO L190 IndexEqualityManager]: detected not equals via solver