./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array23_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array23_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e6bb9e1c9705c406859f1248122e92b7c01da6449c586b213f4fa087ea45e218 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:26:40,115 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:26:40,209 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:26:40,216 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:26:40,219 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:26:40,253 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:26:40,254 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:26:40,255 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:26:40,256 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:26:40,257 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:26:40,257 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:26:40,258 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:26:40,258 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:26:40,259 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:26:40,261 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:26:40,262 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:26:40,262 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:26:40,262 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:26:40,263 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:26:40,263 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:26:40,263 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:26:40,267 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:26:40,268 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:26:40,268 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:26:40,268 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:26:40,269 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:26:40,269 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:26:40,282 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:26:40,282 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:26:40,283 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:26:40,283 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:26:40,283 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:26:40,284 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:26:40,284 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:26:40,284 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:26:40,285 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:26:40,285 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:26:40,285 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:26:40,286 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:26:40,286 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:26:40,286 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:26:40,287 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:26:40,288 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:26:40,288 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:26:40,289 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:26:40,289 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:26:40,289 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:26:40,290 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6bb9e1c9705c406859f1248122e92b7c01da6449c586b213f4fa087ea45e218 [2024-11-09 05:26:40,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:26:40,609 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:26:40,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:26:40,621 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:26:40,623 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:26:40,625 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-patterns/array23_pattern.c Unable to find full path for "g++" [2024-11-09 05:26:42,585 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:26:42,786 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:26:42,786 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/sv-benchmarks/c/array-patterns/array23_pattern.c [2024-11-09 05:26:42,795 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/data/c209afcb1/468f9e64e99146c3b5e8f5e4b3b293b1/FLAG23c4a8f1f [2024-11-09 05:26:42,808 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/data/c209afcb1/468f9e64e99146c3b5e8f5e4b3b293b1 [2024-11-09 05:26:42,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:26:42,812 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:26:42,813 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:26:42,814 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:26:42,823 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:26:42,824 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:26:42" (1/1) ... [2024-11-09 05:26:42,825 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dc67075 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:42, skipping insertion in model container [2024-11-09 05:26:42,825 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:26:42" (1/1) ... [2024-11-09 05:26:42,858 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:26:43,067 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_d5fca947-2f46-42d9-a181-e10cf45dcc68/sv-benchmarks/c/array-patterns/array23_pattern.c[1347,1360] [2024-11-09 05:26:43,113 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:26:43,127 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:26:43,144 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_d5fca947-2f46-42d9-a181-e10cf45dcc68/sv-benchmarks/c/array-patterns/array23_pattern.c[1347,1360] [2024-11-09 05:26:43,170 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:26:43,193 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:26:43,194 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:43 WrapperNode [2024-11-09 05:26:43,194 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:26:43,196 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:26:43,196 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:26:43,196 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:26:43,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:43" (1/1) ... [2024-11-09 05:26:43,214 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:43" (1/1) ... [2024-11-09 05:26:43,235 INFO L138 Inliner]: procedures = 17, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 105 [2024-11-09 05:26:43,235 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:26:43,236 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:26:43,236 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:26:43,236 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:26:43,245 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:43" (1/1) ... [2024-11-09 05:26:43,246 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:43" (1/1) ... [2024-11-09 05:26:43,248 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:43" (1/1) ... [2024-11-09 05:26:43,248 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:43" (1/1) ... [2024-11-09 05:26:43,254 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:43" (1/1) ... [2024-11-09 05:26:43,257 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:43" (1/1) ... [2024-11-09 05:26:43,259 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:43" (1/1) ... [2024-11-09 05:26:43,260 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:43" (1/1) ... [2024-11-09 05:26:43,264 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:26:43,265 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:26:43,265 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:26:43,266 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:26:43,267 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:43" (1/1) ... [2024-11-09 05:26:43,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:26:43,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:26:43,297 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:26:43,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:26:43,334 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2024-11-09 05:26:43,334 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2024-11-09 05:26:43,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:26:43,334 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-09 05:26:43,334 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-09 05:26:43,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:26:43,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 05:26:43,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 05:26:43,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:26:43,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:26:43,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 05:26:43,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 05:26:43,409 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:26:43,411 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:26:43,654 INFO L? ?]: Removed 29 outVars from TransFormulas that were not future-live. [2024-11-09 05:26:43,654 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:26:43,762 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:26:43,762 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 05:26:43,763 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:26:43 BoogieIcfgContainer [2024-11-09 05:26:43,763 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:26:43,767 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:26:43,767 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:26:43,770 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:26:43,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:26:42" (1/3) ... [2024-11-09 05:26:43,771 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d76f44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:26:43, skipping insertion in model container [2024-11-09 05:26:43,772 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:43" (2/3) ... [2024-11-09 05:26:43,772 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d76f44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:26:43, skipping insertion in model container [2024-11-09 05:26:43,772 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:26:43" (3/3) ... [2024-11-09 05:26:43,773 INFO L112 eAbstractionObserver]: Analyzing ICFG array23_pattern.c [2024-11-09 05:26:43,790 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:26:43,790 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:26:43,855 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:26:43,861 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;@55ac46b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:26:43,861 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:26:43,865 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 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) [2024-11-09 05:26:43,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 05:26:43,873 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:26:43,873 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:26:43,874 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:26:43,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:26:43,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1973252798, now seen corresponding path program 1 times [2024-11-09 05:26:43,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:26:43,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229302801] [2024-11-09 05:26:43,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:43,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:26:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:26:44,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:26:44,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229302801] [2024-11-09 05:26:44,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229302801] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:26:44,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:26:44,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:26:44,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135221450] [2024-11-09 05:26:44,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:26:44,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 05:26:44,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:26:44,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 05:26:44,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 05:26:44,076 INFO L87 Difference]: Start difference. First operand has 32 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2024-11-09 05:26:44,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:26:44,116 INFO L93 Difference]: Finished difference Result 44 states and 61 transitions. [2024-11-09 05:26:44,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 05:26:44,119 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 12 [2024-11-09 05:26:44,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:26:44,127 INFO L225 Difference]: With dead ends: 44 [2024-11-09 05:26:44,127 INFO L226 Difference]: Without dead ends: 30 [2024-11-09 05:26:44,131 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 05:26:44,138 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:26:44,143 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:26:44,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-09 05:26:44,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-09 05:26:44,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 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) [2024-11-09 05:26:44,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2024-11-09 05:26:44,189 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 12 [2024-11-09 05:26:44,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:26:44,191 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2024-11-09 05:26:44,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2024-11-09 05:26:44,192 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2024-11-09 05:26:44,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 05:26:44,195 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:26:44,195 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] [2024-11-09 05:26:44,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:26:44,196 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:26:44,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:26:44,198 INFO L85 PathProgramCache]: Analyzing trace with hash 190025996, now seen corresponding path program 1 times [2024-11-09 05:26:44,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:26:44,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640843804] [2024-11-09 05:26:44,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:44,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:26:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 05:26:44,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:26:44,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640843804] [2024-11-09 05:26:44,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640843804] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:26:44,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:26:44,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 05:26:44,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662626103] [2024-11-09 05:26:44,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:26:44,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:26:44,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:26:44,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:26:44,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:26:44,678 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-11-09 05:26:44,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:26:44,721 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2024-11-09 05:26:44,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:26:44,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 27 [2024-11-09 05:26:44,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:26:44,723 INFO L225 Difference]: With dead ends: 39 [2024-11-09 05:26:44,724 INFO L226 Difference]: Without dead ends: 35 [2024-11-09 05:26:44,724 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 [2024-11-09 05:26:44,726 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:26:44,727 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 83 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:26:44,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-09 05:26:44,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-09 05:26:44,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 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) [2024-11-09 05:26:44,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 48 transitions. [2024-11-09 05:26:44,741 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 48 transitions. Word has length 27 [2024-11-09 05:26:44,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:26:44,742 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 48 transitions. [2024-11-09 05:26:44,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-11-09 05:26:44,743 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 48 transitions. [2024-11-09 05:26:44,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 05:26:44,744 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:26:44,744 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, 1] [2024-11-09 05:26:44,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 05:26:44,745 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:26:44,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:26:44,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1744159896, now seen corresponding path program 1 times [2024-11-09 05:26:44,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:26:44,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157387335] [2024-11-09 05:26:44,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:44,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:26:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:26:45,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:26:45,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157387335] [2024-11-09 05:26:45,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157387335] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:26:45,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:26:45,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 05:26:45,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122430633] [2024-11-09 05:26:45,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:26:45,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:26:45,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:26:45,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:26:45,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:26:45,064 INFO L87 Difference]: Start difference. First operand 35 states and 48 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2024-11-09 05:26:45,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:26:45,247 INFO L93 Difference]: Finished difference Result 76 states and 105 transitions. [2024-11-09 05:26:45,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:26:45,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 33 [2024-11-09 05:26:45,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:26:45,251 INFO L225 Difference]: With dead ends: 76 [2024-11-09 05:26:45,251 INFO L226 Difference]: Without dead ends: 48 [2024-11-09 05:26:45,252 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 [2024-11-09 05:26:45,255 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:26:45,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 56 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:26:45,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-09 05:26:45,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2024-11-09 05:26:45,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 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) [2024-11-09 05:26:45,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2024-11-09 05:26:45,271 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 33 [2024-11-09 05:26:45,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:26:45,272 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2024-11-09 05:26:45,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2024-11-09 05:26:45,273 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2024-11-09 05:26:45,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-09 05:26:45,275 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:26:45,275 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, 1, 1, 1, 1, 1] [2024-11-09 05:26:45,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 05:26:45,276 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:26:45,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:26:45,281 INFO L85 PathProgramCache]: Analyzing trace with hash 533367647, now seen corresponding path program 1 times [2024-11-09 05:26:45,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:26:45,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604529061] [2024-11-09 05:26:45,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:45,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:26:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:26:45,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:26:45,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604529061] [2024-11-09 05:26:45,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604529061] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:26:45,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:26:45,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 05:26:45,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037406458] [2024-11-09 05:26:45,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:26:45,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:26:45,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:26:45,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:26:45,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:26:45,504 INFO L87 Difference]: Start difference. First operand 37 states and 50 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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) [2024-11-09 05:26:45,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:26:45,625 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2024-11-09 05:26:45,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:26:45,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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 37 [2024-11-09 05:26:45,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:26:45,627 INFO L225 Difference]: With dead ends: 76 [2024-11-09 05:26:45,628 INFO L226 Difference]: Without dead ends: 44 [2024-11-09 05:26:45,628 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:26:45,631 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:26:45,636 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 57 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:26:45,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-09 05:26:45,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2024-11-09 05:26:45,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 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) [2024-11-09 05:26:45,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2024-11-09 05:26:45,645 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 37 [2024-11-09 05:26:45,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:26:45,646 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2024-11-09 05:26:45,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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) [2024-11-09 05:26:45,648 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2024-11-09 05:26:45,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 05:26:45,649 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:26:45,649 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:26:45,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 05:26:45,650 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:26:45,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:26:45,650 INFO L85 PathProgramCache]: Analyzing trace with hash -89419324, now seen corresponding path program 1 times [2024-11-09 05:26:45,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:26:45,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047070930] [2024-11-09 05:26:45,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:45,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:26:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 05:26:45,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:26:45,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047070930] [2024-11-09 05:26:45,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047070930] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:26:45,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349936594] [2024-11-09 05:26:45,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:45,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:26:45,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:26:45,908 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:26:45,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:26:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:46,018 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 05:26:46,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:26:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:26:46,149 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:26:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 05:26:46,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349936594] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:26:46,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [179950188] [2024-11-09 05:26:46,286 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-09 05:26:46,287 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:26:46,290 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:26:46,297 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:26:46,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:26:48,531 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-09 05:26:48,535 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 46 for LOIs [2024-11-09 05:26:48,568 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:26:50,239 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '595#true' at error location [2024-11-09 05:26:50,240 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:26:50,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:26:50,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-09 05:26:50,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699934402] [2024-11-09 05:26:50,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:26:50,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 05:26:50,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:26:50,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 05:26:50,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=553, Unknown=16, NotChecked=0, Total=650 [2024-11-09 05:26:50,243 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 10 states, 8 states have (on average 4.625) internal successors, (37), 10 states have internal predecessors, (37), 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) [2024-11-09 05:26:50,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:26:50,476 INFO L93 Difference]: Finished difference Result 79 states and 107 transitions. [2024-11-09 05:26:50,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 05:26:50,477 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.625) internal successors, (37), 10 states have internal predecessors, (37), 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 39 [2024-11-09 05:26:50,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:26:50,478 INFO L225 Difference]: With dead ends: 79 [2024-11-09 05:26:50,478 INFO L226 Difference]: Without dead ends: 48 [2024-11-09 05:26:50,479 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=94, Invalid=644, Unknown=18, NotChecked=0, Total=756 [2024-11-09 05:26:50,480 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:26:50,480 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 65 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:26:50,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-09 05:26:50,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2024-11-09 05:26:50,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 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) [2024-11-09 05:26:50,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2024-11-09 05:26:50,488 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 39 [2024-11-09 05:26:50,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:26:50,489 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2024-11-09 05:26:50,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.625) internal successors, (37), 10 states have internal predecessors, (37), 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) [2024-11-09 05:26:50,489 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2024-11-09 05:26:50,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 05:26:50,491 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:26:50,491 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:26:50,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:26:50,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:26:50,692 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:26:50,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:26:50,693 INFO L85 PathProgramCache]: Analyzing trace with hash 683428078, now seen corresponding path program 2 times [2024-11-09 05:26:50,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:26:50,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652290034] [2024-11-09 05:26:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:50,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:26:50,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:26:50,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:26:50,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652290034] [2024-11-09 05:26:50,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652290034] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:26:50,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708533348] [2024-11-09 05:26:50,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:26:50,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:26:50,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:26:50,951 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:26:50,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:26:51,051 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 05:26:51,052 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:26:51,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 05:26:51,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:26:51,211 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:26:51,211 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:26:51,344 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 05:26:51,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708533348] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:26:51,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [318550242] [2024-11-09 05:26:51,348 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-09 05:26:51,348 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:26:51,348 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:26:51,348 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:26:51,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:26:52,653 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-09 05:26:52,654 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 46 for LOIs [2024-11-09 05:26:52,667 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:26:55,996 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1035#true' at error location [2024-11-09 05:26:55,996 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:26:55,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:26:55,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-11-09 05:26:55,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748448006] [2024-11-09 05:26:55,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:26:55,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 05:26:55,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:26:56,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 05:26:56,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=698, Unknown=24, NotChecked=0, Total=812 [2024-11-09 05:26:56,000 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 13 states, 11 states have (on average 5.454545454545454) internal successors, (60), 13 states have internal predecessors, (60), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 05:26:56,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:26:56,333 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2024-11-09 05:26:56,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 05:26:56,334 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.454545454545454) internal successors, (60), 13 states have internal predecessors, (60), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 43 [2024-11-09 05:26:56,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:26:56,335 INFO L225 Difference]: With dead ends: 97 [2024-11-09 05:26:56,335 INFO L226 Difference]: Without dead ends: 70 [2024-11-09 05:26:56,336 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=131, Invalid=897, Unknown=28, NotChecked=0, Total=1056 [2024-11-09 05:26:56,336 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:26:56,337 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 59 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:26:56,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-09 05:26:56,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2024-11-09 05:26:56,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 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) [2024-11-09 05:26:56,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2024-11-09 05:26:56,355 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 43 [2024-11-09 05:26:56,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:26:56,356 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2024-11-09 05:26:56,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.454545454545454) internal successors, (60), 13 states have internal predecessors, (60), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 05:26:56,357 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2024-11-09 05:26:56,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-09 05:26:56,360 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:26:56,360 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:26:56,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:26:56,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:26:56,564 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:26:56,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:26:56,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1133265712, now seen corresponding path program 3 times [2024-11-09 05:26:56,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:26:56,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551412373] [2024-11-09 05:26:56,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:56,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:26:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 05:26:56,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751460390] [2024-11-09 05:26:56,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:26:56,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:26:56,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:26:56,615 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:26:56,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:26:57,128 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:26:57,128 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:26:57,131 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-09 05:26:57,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:26:57,241 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 [2024-11-09 05:26:57,331 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 [2024-11-09 05:26:57,597 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:26:57,598 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 [2024-11-09 05:26:57,701 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:26:57,702 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 [2024-11-09 05:26:58,850 INFO L349 Elim1Store]: treesize reduction 208, result has 33.5 percent of original size [2024-11-09 05:26:58,850 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 [2024-11-09 05:27:00,295 INFO L349 Elim1Store]: treesize reduction 96, result has 41.8 percent of original size [2024-11-09 05:27:00,296 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 [2024-11-09 05:27:01,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:27:01,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:27:01,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:27:01,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:27:01,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:27:01,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:27:01,282 INFO L349 Elim1Store]: treesize reduction 212, result has 0.5 percent of original size [2024-11-09 05:27:01,283 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 [2024-11-09 05:27:01,333 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-11-09 05:27:03,645 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:27:03,645 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 149 treesize of output 69 [2024-11-09 05:27:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:27:03,725 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:27:32,514 WARN L286 SmtUtils]: Spent 13.76s on a formula simplification that was a NOOP. DAG size: 131 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:27:50,481 WARN L286 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:28:14,256 WARN L286 SmtUtils]: Spent 7.73s on a formula simplification. DAG size of input: 140 DAG size of output: 136 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:28:22,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:22,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551412373] [2024-11-09 05:28:22,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 05:28:22,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751460390] [2024-11-09 05:28:22,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751460390] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:22,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1767627819] [2024-11-09 05:28:22,567 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-09 05:28:22,567 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:28:22,568 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:28:22,568 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:28:22,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:28:23,557 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-09 05:28:23,559 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 46 for LOIs [2024-11-09 05:28:23,570 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:28:55,506 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1557#true' at error location [2024-11-09 05:28:55,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:28:55,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:28:55,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2024-11-09 05:28:55,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371830315] [2024-11-09 05:28:55,507 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 05:28:55,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-09 05:28:55,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:55,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-09 05:28:55,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=4313, Unknown=70, NotChecked=0, Total=4692 [2024-11-09 05:28:55,511 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 35 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 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) [2024-11-09 05:28:57,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:57,257 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2024-11-09 05:28:57,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-09 05:28:57,257 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 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 59 [2024-11-09 05:28:57,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:57,259 INFO L225 Difference]: With dead ends: 124 [2024-11-09 05:28:57,259 INFO L226 Difference]: Without dead ends: 120 [2024-11-09 05:28:57,260 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 90.4s TimeCoverageRelationStatistics Valid=309, Invalid=4313, Unknown=70, NotChecked=0, Total=4692 [2024-11-09 05:28:57,261 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 56 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:57,262 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 173 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-09 05:28:57,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-09 05:28:57,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 98. [2024-11-09 05:28:57,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 82 states have internal predecessors, (95), 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) [2024-11-09 05:28:57,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2024-11-09 05:28:57,284 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 59 [2024-11-09 05:28:57,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:57,284 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2024-11-09 05:28:57,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 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) [2024-11-09 05:28:57,285 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2024-11-09 05:28:57,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 05:28:57,286 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:57,286 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:28:57,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 05:28:57,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:57,488 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:57,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:57,488 INFO L85 PathProgramCache]: Analyzing trace with hash 935180661, now seen corresponding path program 4 times [2024-11-09 05:28:57,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:57,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794546308] [2024-11-09 05:28:57,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:57,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-09 05:28:57,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:57,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794546308] [2024-11-09 05:28:57,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794546308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:57,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023114236] [2024-11-09 05:28:57,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:28:57,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:57,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:57,738 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:57,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:28:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:57,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:28:57,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 05:28:57,950 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:28:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-09 05:28:58,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023114236] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:28:58,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [401449263] [2024-11-09 05:28:58,080 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-09 05:28:58,080 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:28:58,080 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:28:58,081 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:28:58,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:28:59,009 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-09 05:28:59,010 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 46 for LOIs [2024-11-09 05:28:59,018 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:29:02,491 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2609#(exists ((|v_ULTIMATE.start_main_~row~0#1_83| Int)) (and (<= 1 ~ARR_SIZE~0) (<= ~ARR_SIZE~0 |v_ULTIMATE.start_main_~row~0#1_83|)))' at error location [2024-11-09 05:29:02,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:29:02,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:29:02,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-09 05:29:02,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184651845] [2024-11-09 05:29:02,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:29:02,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 05:29:02,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:29:02,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 05:29:02,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1077, Unknown=48, NotChecked=0, Total=1260 [2024-11-09 05:29:02,493 INFO L87 Difference]: Start difference. First operand 98 states and 113 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 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) [2024-11-09 05:29:03,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:29:03,028 INFO L93 Difference]: Finished difference Result 254 states and 296 transitions. [2024-11-09 05:29:03,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 05:29:03,028 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 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 61 [2024-11-09 05:29:03,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:29:03,029 INFO L225 Difference]: With dead ends: 254 [2024-11-09 05:29:03,030 INFO L226 Difference]: Without dead ends: 174 [2024-11-09 05:29:03,031 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 143 SyntacticMatches, 13 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=193, Invalid=1475, Unknown=54, NotChecked=0, Total=1722 [2024-11-09 05:29:03,031 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 37 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:29:03,032 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 185 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:29:03,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-09 05:29:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 156. [2024-11-09 05:29:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 127 states have (on average 1.1496062992125984) internal successors, (146), 128 states have internal predecessors, (146), 17 states have call successors, (17), 11 states have call predecessors, (17), 11 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-09 05:29:03,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 180 transitions. [2024-11-09 05:29:03,074 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 180 transitions. Word has length 61 [2024-11-09 05:29:03,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:29:03,074 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 180 transitions. [2024-11-09 05:29:03,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 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) [2024-11-09 05:29:03,075 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 180 transitions. [2024-11-09 05:29:03,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 05:29:03,076 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:29:03,077 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:29:03,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 05:29:03,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:03,281 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:29:03,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:29:03,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1129802475, now seen corresponding path program 5 times [2024-11-09 05:29:03,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:29:03,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540837763] [2024-11-09 05:29:03,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:03,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:29:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:29:03,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:29:03,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540837763] [2024-11-09 05:29:03,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540837763] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:29:03,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661432862] [2024-11-09 05:29:03,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:29:03,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:03,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:29:03,505 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:29:03,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:29:03,658 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 05:29:03,658 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:29:03,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:29:03,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:29:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-09 05:29:03,828 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:29:04,014 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-09 05:29:04,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661432862] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:29:04,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1016995593] [2024-11-09 05:29:04,016 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-09 05:29:04,017 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:29:04,017 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:29:04,017 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:29:04,017 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:29:04,896 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-09 05:29:04,897 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 46 for LOIs [2024-11-09 05:29:04,909 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:29:08,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3286#true' at error location [2024-11-09 05:29:08,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:29:08,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:29:08,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-11-09 05:29:08,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420637323] [2024-11-09 05:29:08,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:29:08,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 05:29:08,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:29:08,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 05:29:08,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1272, Unknown=16, NotChecked=0, Total=1406 [2024-11-09 05:29:08,266 INFO L87 Difference]: Start difference. First operand 156 states and 180 transitions. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 2 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 05:29:09,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:29:09,916 INFO L93 Difference]: Finished difference Result 252 states and 290 transitions. [2024-11-09 05:29:09,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-09 05:29:09,916 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 2 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 61 [2024-11-09 05:29:09,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:29:09,918 INFO L225 Difference]: With dead ends: 252 [2024-11-09 05:29:09,918 INFO L226 Difference]: Without dead ends: 192 [2024-11-09 05:29:09,920 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=582, Invalid=4219, Unknown=29, NotChecked=0, Total=4830 [2024-11-09 05:29:09,921 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 196 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:29:09,921 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 160 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 05:29:09,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-09 05:29:09,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 171. [2024-11-09 05:29:09,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 149 states have (on average 1.1208053691275168) internal successors, (167), 149 states have internal predecessors, (167), 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) [2024-11-09 05:29:09,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 193 transitions. [2024-11-09 05:29:09,961 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 193 transitions. Word has length 61 [2024-11-09 05:29:09,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:29:09,962 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 193 transitions. [2024-11-09 05:29:09,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 2 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 05:29:09,962 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 193 transitions. [2024-11-09 05:29:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-09 05:29:09,963 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:29:09,964 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:29:09,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 05:29:10,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:10,164 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:29:10,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:29:10,165 INFO L85 PathProgramCache]: Analyzing trace with hash 603058849, now seen corresponding path program 6 times [2024-11-09 05:29:10,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:29:10,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546840922] [2024-11-09 05:29:10,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:10,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:29:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 37 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 05:29:10,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:29:10,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546840922] [2024-11-09 05:29:10,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546840922] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:29:10,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855543929] [2024-11-09 05:29:10,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:29:10,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:10,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:29:10,381 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:29:10,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:29:10,478 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:29:10,478 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:29:10,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:29:10,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:29:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 05:29:10,650 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:29:10,784 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 54 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 05:29:10,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855543929] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:29:10,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1560521627] [2024-11-09 05:29:10,786 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-09 05:29:10,787 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:29:10,787 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:29:10,787 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:29:10,787 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:29:11,724 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-09 05:29:11,726 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 46 for LOIs [2024-11-09 05:29:11,736 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:29:14,933 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse10 (<= 1 c_~ARR_SIZE~0))) (let ((.cse11 (and (<= 1 |c_ULTIMATE.start_main_~row~0#1|) .cse10)) (.cse0 (= |c_ULTIMATE.start_main_~row~0#1| 0))) (and (or (and .cse0 (exists ((|v_ULTIMATE.start_main_~index1~0#1_47| Int) (|v_ULTIMATE.start_main_#t~mem13#1_17| Int) (|v_ULTIMATE.start_main_~index2~0#1_41| Int) (|v_ULTIMATE.start_main_#t~ite14#1_16| Int) (|v_ULTIMATE.start_main_#t~ret12#1_40| Int) (|v_#memory_int_130| (Array Int (Array Int Int)))) (let ((.cse9 (* |v_ULTIMATE.start_main_~index2~0#1_41| 4)) (.cse7 (mod (+ c_~ARR_SIZE~0 4294967295 (* |v_ULTIMATE.start_main_~index1~0#1_47| 4294967295)) 4294967296)) (.cse8 (* c_~ARR_SIZE~0 4))) (let ((.cse4 (+ .cse9 |c_ULTIMATE.start_main_~#array~0#1.offset| (* (+ .cse7 (- 4294967296)) .cse8))) (.cse5 (<= 2147483648 .cse7)) (.cse1 (<= .cse7 2147483647)) (.cse2 (select |v_#memory_int_130| |c_ULTIMATE.start_main_~#array~0#1.base|)) (.cse3 (+ (* .cse7 .cse8) .cse9 |c_ULTIMATE.start_main_~#array~0#1.offset|))) (and (<= |v_ULTIMATE.start_main_~index1~0#1_47| 32767) (<= |v_ULTIMATE.start_main_~index2~0#1_41| 32767) (<= 0 |v_ULTIMATE.start_main_~index2~0#1_41|) (or (and .cse1 (= (store |v_#memory_int_130| |c_ULTIMATE.start_main_~#array~0#1.base| (store .cse2 .cse3 |v_ULTIMATE.start_main_#t~ite14#1_16|)) |c_#memory_int|)) (and (= (store |v_#memory_int_130| |c_ULTIMATE.start_main_~#array~0#1.base| (store .cse2 .cse4 |v_ULTIMATE.start_main_#t~ite14#1_16|)) |c_#memory_int|) .cse5)) (<= 0 |v_ULTIMATE.start_main_#t~ret12#1_40|) (let ((.cse6 (= |v_ULTIMATE.start_main_#t~ret12#1_40| 0))) (or (and (or (and (= (select .cse2 .cse4) |v_ULTIMATE.start_main_#t~mem13#1_17|) .cse5) (and .cse1 (= (select .cse2 .cse3) |v_ULTIMATE.start_main_#t~mem13#1_17|))) .cse6 (= |v_ULTIMATE.start_main_#t~ite14#1_16| |v_ULTIMATE.start_main_#t~mem13#1_17|)) (and (not .cse6) (= |v_ULTIMATE.start_main_#t~ite14#1_16| |c_ULTIMATE.start_main_~num~0#1|)))) (<= |v_ULTIMATE.start_main_#t~ret12#1_40| 1) (<= 0 |v_ULTIMATE.start_main_~index1~0#1_47|))))) .cse10) .cse11) (or .cse11 (and .cse0 .cse10))))) is different from true [2024-11-09 05:29:15,535 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4836#(exists ((|v_ULTIMATE.start_main_~row~0#1_115| Int)) (and (<= ~ARR_SIZE~0 |v_ULTIMATE.start_main_~row~0#1_115|) (<= 1 ~ARR_SIZE~0)))' at error location [2024-11-09 05:29:15,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:29:15,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:29:15,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-09 05:29:15,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869533280] [2024-11-09 05:29:15,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:29:15,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 05:29:15,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:29:15,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 05:29:15,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1110, Unknown=24, NotChecked=68, Total=1332 [2024-11-09 05:29:15,538 INFO L87 Difference]: Start difference. First operand 171 states and 193 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 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) [2024-11-09 05:29:15,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:29:15,873 INFO L93 Difference]: Finished difference Result 202 states and 223 transitions. [2024-11-09 05:29:15,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 05:29:15,874 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 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 67 [2024-11-09 05:29:15,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:29:15,875 INFO L225 Difference]: With dead ends: 202 [2024-11-09 05:29:15,875 INFO L226 Difference]: Without dead ends: 172 [2024-11-09 05:29:15,876 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 168 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=223, Invalid=1737, Unknown=24, NotChecked=86, Total=2070 [2024-11-09 05:29:15,877 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:29:15,877 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 89 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:29:15,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-09 05:29:15,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 162. [2024-11-09 05:29:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 140 states have (on average 1.1142857142857143) internal successors, (156), 140 states have internal predecessors, (156), 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) [2024-11-09 05:29:15,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 182 transitions. [2024-11-09 05:29:15,907 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 182 transitions. Word has length 67 [2024-11-09 05:29:15,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:29:15,908 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 182 transitions. [2024-11-09 05:29:15,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 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) [2024-11-09 05:29:15,908 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 182 transitions. [2024-11-09 05:29:15,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-09 05:29:15,909 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:29:15,910 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:29:15,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 05:29:16,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 05:29:16,114 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:29:16,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:29:16,115 INFO L85 PathProgramCache]: Analyzing trace with hash -189867793, now seen corresponding path program 1 times [2024-11-09 05:29:16,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:29:16,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256239741] [2024-11-09 05:29:16,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:16,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:29:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 05:29:16,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403459944] [2024-11-09 05:29:16,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:16,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:16,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:29:16,170 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:29:16,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5fca947-2f46-42d9-a181-e10cf45dcc68/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:29:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:18,664 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-11-09 05:29:18,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:29:18,794 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 [2024-11-09 05:29:18,876 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 [2024-11-09 05:29:19,145 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:29:19,145 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 [2024-11-09 05:29:19,241 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:29:19,241 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 [2024-11-09 05:29:20,183 INFO L349 Elim1Store]: treesize reduction 208, result has 33.5 percent of original size [2024-11-09 05:29:20,183 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 [2024-11-09 05:29:21,414 INFO L349 Elim1Store]: treesize reduction 96, result has 41.8 percent of original size [2024-11-09 05:29:21,414 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 [2024-11-09 05:29:22,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:29:22,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:29:22,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:29:22,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:29:22,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:29:22,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:29:22,433 INFO L349 Elim1Store]: treesize reduction 212, result has 0.5 percent of original size [2024-11-09 05:29:22,434 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 [2024-11-09 05:29:22,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:29:22,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:29:22,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:29:22,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:29:22,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:29:22,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:29:22,617 INFO L349 Elim1Store]: treesize reduction 144, result has 37.1 percent of original size [2024-11-09 05:29:22,618 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 [2024-11-09 05:29:26,476 INFO L349 Elim1Store]: treesize reduction 704, result has 34.1 percent of original size [2024-11-09 05:29:26,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 20 select indices, 20 select index equivalence classes, 6 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 210 case distinctions, treesize of input 263 treesize of output 499 [2024-11-09 05:30:07,782 INFO L349 Elim1Store]: treesize reduction 896, result has 21.1 percent of original size [2024-11-09 05:30:07,783 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 952 treesize of output 984 [2024-11-09 05:30:44,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:30:44,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:30:44,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:30:44,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:30:44,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:30:44,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:30:45,708 INFO L349 Elim1Store]: treesize reduction 806, result has 24.0 percent of original size [2024-11-09 05:30:45,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 9 select indices, 9 select index equivalence classes, 13 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 42 case distinctions, treesize of input 1276 treesize of output 1491 [2024-11-09 05:36:00,823 WARN L286 SmtUtils]: Spent 13.94s on a formula simplification that was a NOOP. DAG size: 865 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 05:36:21,402 WARN L286 SmtUtils]: Spent 6.88s on a formula simplification that was a NOOP. DAG size: 854 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 05:38:46,252 WARN L286 SmtUtils]: Spent 7.89s on a formula simplification that was a NOOP. DAG size: 27418 (called from [L 158] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate) [2024-11-09 05:38:54,699 WARN L286 SmtUtils]: Spent 8.31s on a formula simplification that was a NOOP. DAG size: 27410 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 05:39:02,187 WARN L286 SmtUtils]: Spent 7.43s on a formula simplification that was a NOOP. DAG size: 27410 (called from [L 163] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate) [2024-11-09 05:39:10,746 WARN L286 SmtUtils]: Spent 8.16s on a formula simplification. DAG size of input: 27412 DAG size of output: 27411 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 05:40:16,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:40:16,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:40:16,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:40:16,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:40:16,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:40:16,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:40:17,234 INFO L224 Elim1Store]: Index analysis took 445 ms