./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.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_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/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_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/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_2846d1aa-fb35-4178-95ca-5ba64ac20684/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 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 06:38:04,321 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:38:04,433 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 06:38:04,440 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:38:04,443 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:38:04,484 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:38:04,485 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:38:04,486 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:38:04,487 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:38:04,488 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:38:04,489 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:38:04,489 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:38:04,490 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:38:04,490 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:38:04,491 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:38:04,491 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:38:04,495 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:38:04,499 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:38:04,499 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:38:04,500 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:38:04,500 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:38:04,501 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:38:04,502 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:38:04,502 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 06:38:04,503 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:38:04,503 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:38:04,503 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:38:04,505 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:38:04,506 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 06:38:04,506 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:38:04,507 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 06:38:04,508 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:38:04,508 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:38:04,509 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 06:38:04,509 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:38:04,510 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:38:04,510 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:38:04,511 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:38:04,511 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:38:04,512 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:38:04,513 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:38:04,514 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 06:38:04,515 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:38:04,515 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:38:04,516 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:38:04,516 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:38:04,517 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:38:04,517 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_2846d1aa-fb35-4178-95ca-5ba64ac20684/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 [2024-11-09 06:38:04,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:38:04,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:38:04,875 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:38:04,877 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:38:04,878 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:38:04,880 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c Unable to find full path for "g++" [2024-11-09 06:38:07,029 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:38:07,332 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:38:07,333 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2024-11-09 06:38:07,345 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/data/6c77e0210/e0b47bbc4e984267b96ba02be97baf9e/FLAGc98847a4e [2024-11-09 06:38:07,622 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/data/6c77e0210/e0b47bbc4e984267b96ba02be97baf9e [2024-11-09 06:38:07,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:38:07,627 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:38:07,628 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:38:07,628 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:38:07,637 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:38:07,638 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:38:07" (1/1) ... [2024-11-09 06:38:07,639 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@258fab5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:38:07, skipping insertion in model container [2024-11-09 06:38:07,639 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:38:07" (1/1) ... [2024-11-09 06:38:07,663 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:38:07,907 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_2846d1aa-fb35-4178-95ca-5ba64ac20684/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2024-11-09 06:38:07,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:38:07,952 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:38:07,965 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_2846d1aa-fb35-4178-95ca-5ba64ac20684/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2024-11-09 06:38:07,984 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:38:08,004 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:38:08,005 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:38:08 WrapperNode [2024-11-09 06:38:08,005 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:38:08,007 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:38:08,007 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:38:08,007 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:38:08,013 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:38:08" (1/1) ... [2024-11-09 06:38:08,020 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:38:08" (1/1) ... [2024-11-09 06:38:08,043 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 127 [2024-11-09 06:38:08,043 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:38:08,044 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:38:08,044 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:38:08,045 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:38:08,053 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:38:08" (1/1) ... [2024-11-09 06:38:08,053 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:38:08" (1/1) ... [2024-11-09 06:38:08,057 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:38:08" (1/1) ... [2024-11-09 06:38:08,057 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:38:08" (1/1) ... [2024-11-09 06:38:08,063 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:38:08" (1/1) ... [2024-11-09 06:38:08,068 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:38:08" (1/1) ... [2024-11-09 06:38:08,070 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:38:08" (1/1) ... [2024-11-09 06:38:08,071 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:38:08" (1/1) ... [2024-11-09 06:38:08,073 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:38:08,074 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:38:08,074 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:38:08,075 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:38:08,075 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:38:08" (1/1) ... [2024-11-09 06:38:08,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:38:08,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:38:08,109 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:38:08,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:38:08,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 06:38:08,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 06:38:08,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 06:38:08,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 06:38:08,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:38:08,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:38:08,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 06:38:08,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 06:38:08,219 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:38:08,222 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:38:08,478 INFO L? ?]: Removed 41 outVars from TransFormulas that were not future-live. [2024-11-09 06:38:08,478 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:38:08,568 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:38:08,569 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 06:38:08,569 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:38:08 BoogieIcfgContainer [2024-11-09 06:38:08,570 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:38:08,573 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:38:08,573 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:38:08,577 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:38:08,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:38:07" (1/3) ... [2024-11-09 06:38:08,579 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bd2fed3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:38:08, skipping insertion in model container [2024-11-09 06:38:08,579 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:38:08" (2/3) ... [2024-11-09 06:38:08,580 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bd2fed3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:38:08, skipping insertion in model container [2024-11-09 06:38:08,580 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:38:08" (3/3) ... [2024-11-09 06:38:08,582 INFO L112 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2024-11-09 06:38:08,604 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:38:08,605 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 06:38:08,690 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:38:08,698 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;@424f4fd5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:38:08,699 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 06:38:08,703 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:08,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 06:38:08,711 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:08,711 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:38:08,712 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:38:08,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:08,717 INFO L85 PathProgramCache]: Analyzing trace with hash -831168110, now seen corresponding path program 1 times [2024-11-09 06:38:08,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:08,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70169041] [2024-11-09 06:38:08,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:08,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:09,085 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 06:38:09,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:09,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70169041] [2024-11-09 06:38:09,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70169041] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:38:09,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:38:09,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:38:09,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627569804] [2024-11-09 06:38:09,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:38:09,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:38:09,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:09,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:38:09,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:38:09,145 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:09,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:09,243 INFO L93 Difference]: Finished difference Result 51 states and 81 transitions. [2024-11-09 06:38:09,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:38:09,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-09 06:38:09,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:09,256 INFO L225 Difference]: With dead ends: 51 [2024-11-09 06:38:09,256 INFO L226 Difference]: Without dead ends: 26 [2024-11-09 06:38:09,260 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:38:09,265 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:09,266 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 47 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:38:09,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-09 06:38:09,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-09 06:38:09,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:09,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 38 transitions. [2024-11-09 06:38:09,311 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 38 transitions. Word has length 12 [2024-11-09 06:38:09,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:09,311 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 38 transitions. [2024-11-09 06:38:09,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:09,312 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 38 transitions. [2024-11-09 06:38:09,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-09 06:38:09,313 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:09,313 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:38:09,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:38:09,314 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:38:09,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:09,316 INFO L85 PathProgramCache]: Analyzing trace with hash 364923821, now seen corresponding path program 1 times [2024-11-09 06:38:09,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:09,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953297551] [2024-11-09 06:38:09,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:09,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:38:09,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:09,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953297551] [2024-11-09 06:38:09,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953297551] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:38:09,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:38:09,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:38:09,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084810331] [2024-11-09 06:38:09,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:38:09,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:38:09,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:09,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:38:09,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:38:09,529 INFO L87 Difference]: Start difference. First operand 26 states and 38 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:09,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:09,637 INFO L93 Difference]: Finished difference Result 46 states and 68 transitions. [2024-11-09 06:38:09,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:38:09,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-09 06:38:09,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:09,639 INFO L225 Difference]: With dead ends: 46 [2024-11-09 06:38:09,639 INFO L226 Difference]: Without dead ends: 33 [2024-11-09 06:38:09,640 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:38:09,641 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:09,645 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 31 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:38:09,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-09 06:38:09,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2024-11-09 06:38:09,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:09,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2024-11-09 06:38:09,653 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 14 [2024-11-09 06:38:09,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:09,653 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2024-11-09 06:38:09,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:09,654 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2024-11-09 06:38:09,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 06:38:09,655 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:09,655 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:38:09,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 06:38:09,656 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:38:09,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:09,656 INFO L85 PathProgramCache]: Analyzing trace with hash 539574685, now seen corresponding path program 1 times [2024-11-09 06:38:09,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:09,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345329357] [2024-11-09 06:38:09,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:09,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:09,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:38:09,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:09,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345329357] [2024-11-09 06:38:09,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345329357] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:38:09,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:38:09,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:38:09,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598637530] [2024-11-09 06:38:09,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:38:09,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:38:09,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:09,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:38:09,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:38:09,816 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:09,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:09,852 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2024-11-09 06:38:09,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:38:09,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-09 06:38:09,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:09,854 INFO L225 Difference]: With dead ends: 40 [2024-11-09 06:38:09,854 INFO L226 Difference]: Without dead ends: 29 [2024-11-09 06:38:09,854 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:38:09,856 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:09,857 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 39 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:38:09,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-09 06:38:09,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-09 06:38:09,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:09,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2024-11-09 06:38:09,863 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 19 [2024-11-09 06:38:09,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:09,864 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2024-11-09 06:38:09,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:09,864 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2024-11-09 06:38:09,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 06:38:09,865 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:09,865 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:38:09,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 06:38:09,866 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:38:09,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:09,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1754764330, now seen corresponding path program 1 times [2024-11-09 06:38:09,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:09,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918914839] [2024-11-09 06:38:09,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:09,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:10,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:38:10,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:10,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918914839] [2024-11-09 06:38:10,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918914839] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:38:10,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864213925] [2024-11-09 06:38:10,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:10,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:10,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:38:10,257 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:38:10,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:38:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:10,403 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 06:38:10,409 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:38:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:38:10,526 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:38:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:38:10,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864213925] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:38:10,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1681660444] [2024-11-09 06:38:10,653 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:38:10,653 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:38:10,657 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:38:10,663 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:38:10,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:38:13,767 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:38:16,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1681660444] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:38:16,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:38:16,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 3, 3] total 17 [2024-11-09 06:38:16,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350605790] [2024-11-09 06:38:16,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:38:16,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 06:38:16,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:16,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 06:38:16,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=224, Unknown=3, NotChecked=0, Total=306 [2024-11-09 06:38:16,018 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:16,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:16,863 INFO L93 Difference]: Finished difference Result 66 states and 93 transitions. [2024-11-09 06:38:16,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 06:38:16,864 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-09 06:38:16,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:16,864 INFO L225 Difference]: With dead ends: 66 [2024-11-09 06:38:16,865 INFO L226 Difference]: Without dead ends: 42 [2024-11-09 06:38:16,865 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=106, Invalid=310, Unknown=4, NotChecked=0, Total=420 [2024-11-09 06:38:16,867 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:16,867 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 57 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:38:16,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-09 06:38:16,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2024-11-09 06:38:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:16,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2024-11-09 06:38:16,877 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 22 [2024-11-09 06:38:16,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:16,878 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2024-11-09 06:38:16,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:16,878 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2024-11-09 06:38:16,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 06:38:16,879 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:16,879 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:38:16,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 06:38:17,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:17,081 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:38:17,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:17,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1746036447, now seen corresponding path program 1 times [2024-11-09 06:38:17,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:17,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460570844] [2024-11-09 06:38:17,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:17,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:17,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 06:38:17,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:17,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460570844] [2024-11-09 06:38:17,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460570844] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:38:17,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438152411] [2024-11-09 06:38:17,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:17,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:17,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:38:17,362 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:38:17,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 06:38:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:17,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 06:38:17,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:38:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 06:38:17,517 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:38:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 06:38:17,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438152411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:38:17,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [855114447] [2024-11-09 06:38:17,558 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-09 06:38:17,559 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:38:17,560 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:38:17,560 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:38:17,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:38:18,758 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:38:19,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '775#(and (<= 2 ~SIZE~0) (= |ULTIMATE.start_main_~i~1#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) |ULTIMATE.start_main_~#set~0#1.offset|) |ULTIMATE.start_main_~element~0#1|))' at error location [2024-11-09 06:38:19,337 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:38:19,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:38:19,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2024-11-09 06:38:19,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420523684] [2024-11-09 06:38:19,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:38:19,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 06:38:19,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:19,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 06:38:19,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2024-11-09 06:38:19,341 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:19,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:19,590 INFO L93 Difference]: Finished difference Result 86 states and 119 transitions. [2024-11-09 06:38:19,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 06:38:19,591 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-09 06:38:19,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:19,591 INFO L225 Difference]: With dead ends: 86 [2024-11-09 06:38:19,591 INFO L226 Difference]: Without dead ends: 55 [2024-11-09 06:38:19,592 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2024-11-09 06:38:19,593 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:19,593 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 54 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:38:19,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-09 06:38:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2024-11-09 06:38:19,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:19,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2024-11-09 06:38:19,615 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 28 [2024-11-09 06:38:19,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:19,616 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2024-11-09 06:38:19,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:19,617 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2024-11-09 06:38:19,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-09 06:38:19,618 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:19,618 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:38:19,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 06:38:19,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:19,822 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:38:19,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:19,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1350180323, now seen corresponding path program 2 times [2024-11-09 06:38:19,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:19,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738629968] [2024-11-09 06:38:19,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:19,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 06:38:20,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:20,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738629968] [2024-11-09 06:38:20,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738629968] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:38:20,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489106497] [2024-11-09 06:38:20,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:38:20,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:20,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:38:20,018 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:38:20,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 06:38:20,138 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 06:38:20,138 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:38:20,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 06:38:20,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:38:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 06:38:20,260 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:38:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 06:38:20,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489106497] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:38:20,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [240390192] [2024-11-09 06:38:20,347 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-09 06:38:20,348 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:38:20,348 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:38:20,348 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:38:20,348 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:38:22,422 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:38:23,613 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1209#(and (<= 2 ~SIZE~0) (= |ULTIMATE.start_main_~i~1#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) |ULTIMATE.start_main_~#set~0#1.offset|) |ULTIMATE.start_main_~element~0#1|))' at error location [2024-11-09 06:38:23,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:38:23,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:38:23,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2024-11-09 06:38:23,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273045475] [2024-11-09 06:38:23,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:38:23,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 06:38:23,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:23,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 06:38:23,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2024-11-09 06:38:23,616 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:23,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:23,984 INFO L93 Difference]: Finished difference Result 182 states and 234 transitions. [2024-11-09 06:38:23,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 06:38:23,985 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-09 06:38:23,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:23,988 INFO L225 Difference]: With dead ends: 182 [2024-11-09 06:38:23,988 INFO L226 Difference]: Without dead ends: 143 [2024-11-09 06:38:23,989 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=200, Invalid=1282, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 06:38:23,990 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 285 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:23,990 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 100 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:38:23,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-09 06:38:24,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 102. [2024-11-09 06:38:24,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.306930693069307) internal successors, (132), 101 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:24,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 132 transitions. [2024-11-09 06:38:24,017 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 132 transitions. Word has length 36 [2024-11-09 06:38:24,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:24,017 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 132 transitions. [2024-11-09 06:38:24,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:24,018 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 132 transitions. [2024-11-09 06:38:24,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-09 06:38:24,019 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:24,020 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:38:24,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 06:38:24,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 06:38:24,221 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:38:24,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:24,222 INFO L85 PathProgramCache]: Analyzing trace with hash 518531384, now seen corresponding path program 3 times [2024-11-09 06:38:24,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:24,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500669475] [2024-11-09 06:38:24,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:24,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-09 06:38:24,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:24,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500669475] [2024-11-09 06:38:24,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500669475] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:38:24,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408409938] [2024-11-09 06:38:24,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:38:24,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:24,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:38:24,532 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:38:24,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 06:38:24,668 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:38:24,668 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:38:24,670 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 06:38:24,673 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:38:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 06:38:24,760 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:38:24,850 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 06:38:24,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 06:38:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 06:38:24,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408409938] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:38:24,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [278929120] [2024-11-09 06:38:24,859 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-09 06:38:24,859 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:38:24,860 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:38:24,860 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:38:24,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:38:26,932 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:38:28,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1975#(and (<= 2 ~SIZE~0) (= |ULTIMATE.start_main_~i~1#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) |ULTIMATE.start_main_~#set~0#1.offset|) |ULTIMATE.start_main_~element~0#1|))' at error location [2024-11-09 06:38:28,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:38:28,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:38:28,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-09 06:38:28,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960331336] [2024-11-09 06:38:28,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:38:28,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 06:38:28,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:28,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 06:38:28,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=757, Unknown=1, NotChecked=0, Total=870 [2024-11-09 06:38:28,066 INFO L87 Difference]: Start difference. First operand 102 states and 132 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:28,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:28,257 INFO L93 Difference]: Finished difference Result 214 states and 276 transitions. [2024-11-09 06:38:28,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 06:38:28,257 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-11-09 06:38:28,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:28,258 INFO L225 Difference]: With dead ends: 214 [2024-11-09 06:38:28,258 INFO L226 Difference]: Without dead ends: 124 [2024-11-09 06:38:28,259 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=121, Invalid=808, Unknown=1, NotChecked=0, Total=930 [2024-11-09 06:38:28,260 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:28,260 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 131 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:38:28,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-09 06:38:28,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 109. [2024-11-09 06:38:28,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.2962962962962963) internal successors, (140), 108 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:28,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 140 transitions. [2024-11-09 06:38:28,284 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 140 transitions. Word has length 58 [2024-11-09 06:38:28,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:28,284 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 140 transitions. [2024-11-09 06:38:28,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:28,285 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 140 transitions. [2024-11-09 06:38:28,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-09 06:38:28,286 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:28,286 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:38:28,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 06:38:28,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:28,487 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:38:28,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:28,488 INFO L85 PathProgramCache]: Analyzing trace with hash -997406344, now seen corresponding path program 1 times [2024-11-09 06:38:28,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:28,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371064328] [2024-11-09 06:38:28,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:28,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-09 06:38:28,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:28,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371064328] [2024-11-09 06:38:28,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371064328] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:38:28,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143321045] [2024-11-09 06:38:28,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:28,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:28,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:38:28,796 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:38:28,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 06:38:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:28,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 06:38:28,990 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:38:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-09 06:38:29,119 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:38:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-09 06:38:29,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143321045] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:38:29,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1520415656] [2024-11-09 06:38:29,274 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-09 06:38:29,275 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:38:29,275 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:38:29,275 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:38:29,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:38:30,003 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:38:30,530 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2815#(and (<= 2 ~SIZE~0) (= |ULTIMATE.start_main_~i~1#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) |ULTIMATE.start_main_~#set~0#1.offset|) |ULTIMATE.start_main_~element~0#1|))' at error location [2024-11-09 06:38:30,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:38:30,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:38:30,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-09 06:38:30,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235130206] [2024-11-09 06:38:30,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:38:30,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 06:38:30,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:30,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 06:38:30,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1105, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 06:38:30,534 INFO L87 Difference]: Start difference. First operand 109 states and 140 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:30,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:30,677 INFO L93 Difference]: Finished difference Result 221 states and 290 transitions. [2024-11-09 06:38:30,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 06:38:30,677 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2024-11-09 06:38:30,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:30,679 INFO L225 Difference]: With dead ends: 221 [2024-11-09 06:38:30,679 INFO L226 Difference]: Without dead ends: 126 [2024-11-09 06:38:30,680 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 148 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=1105, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 06:38:30,681 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:30,682 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 61 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:38:30,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-09 06:38:30,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2024-11-09 06:38:30,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.2580645161290323) internal successors, (156), 124 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:30,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 156 transitions. [2024-11-09 06:38:30,719 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 156 transitions. Word has length 62 [2024-11-09 06:38:30,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:30,720 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 156 transitions. [2024-11-09 06:38:30,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:30,720 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 156 transitions. [2024-11-09 06:38:30,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-09 06:38:30,723 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:30,723 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:38:30,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 06:38:30,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:30,927 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:38:30,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:30,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1731331920, now seen corresponding path program 2 times [2024-11-09 06:38:30,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:30,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379332984] [2024-11-09 06:38:30,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:30,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-09 06:38:31,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:31,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379332984] [2024-11-09 06:38:31,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379332984] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:38:31,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138645348] [2024-11-09 06:38:31,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:38:31,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:31,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:38:31,809 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:38:31,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 06:38:31,972 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 06:38:31,972 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:38:31,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 06:38:31,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:38:32,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2024-11-09 06:38:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2024-11-09 06:38:32,236 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:38:32,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2024-11-09 06:38:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2024-11-09 06:38:32,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138645348] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:38:32,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [419255391] [2024-11-09 06:38:32,491 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-09 06:38:32,491 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:38:32,491 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:38:32,492 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:38:32,492 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:38:34,477 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:38:35,718 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3794#(and (<= 2 ~SIZE~0) (= |ULTIMATE.start_main_~i~1#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) |ULTIMATE.start_main_~#set~0#1.offset|) |ULTIMATE.start_main_~element~0#1|))' at error location [2024-11-09 06:38:35,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:38:35,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:38:35,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 7] total 28 [2024-11-09 06:38:35,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215488214] [2024-11-09 06:38:35,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:38:35,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 06:38:35,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:35,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 06:38:35,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1782, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 06:38:35,722 INFO L87 Difference]: Start difference. First operand 125 states and 156 transitions. Second operand has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 28 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:38,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:38,038 INFO L93 Difference]: Finished difference Result 508 states and 651 transitions. [2024-11-09 06:38:38,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-09 06:38:38,038 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 28 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2024-11-09 06:38:38,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:38,040 INFO L225 Difference]: With dead ends: 508 [2024-11-09 06:38:38,041 INFO L226 Difference]: Without dead ends: 413 [2024-11-09 06:38:38,047 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3309 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2336, Invalid=7966, Unknown=0, NotChecked=0, Total=10302 [2024-11-09 06:38:38,049 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 658 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:38,051 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 119 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:38:38,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2024-11-09 06:38:38,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 194. [2024-11-09 06:38:38,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.2487046632124352) internal successors, (241), 193 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:38,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 241 transitions. [2024-11-09 06:38:38,115 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 241 transitions. Word has length 78 [2024-11-09 06:38:38,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:38,116 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 241 transitions. [2024-11-09 06:38:38,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 28 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:38,116 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 241 transitions. [2024-11-09 06:38:38,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-09 06:38:38,121 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:38,121 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 6, 6, 6, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:38:38,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 06:38:38,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:38,322 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:38:38,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:38,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2078116468, now seen corresponding path program 3 times [2024-11-09 06:38:38,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:38,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226059697] [2024-11-09 06:38:38,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:38,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2024-11-09 06:38:39,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:39,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226059697] [2024-11-09 06:38:39,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226059697] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:38:39,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262814566] [2024-11-09 06:38:39,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:38:39,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:39,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:38:39,219 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:38:39,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 06:38:39,402 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:38:39,402 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:38:39,403 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 06:38:39,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:38:40,040 INFO L349 Elim1Store]: treesize reduction 100, result has 25.4 percent of original size [2024-11-09 06:38:40,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 45 [2024-11-09 06:38:40,165 INFO L349 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2024-11-09 06:38:40,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 27 [2024-11-09 06:38:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2024-11-09 06:38:40,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:38:45,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2024-11-09 06:38:45,300 INFO L349 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2024-11-09 06:38:45,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 123 [2024-11-09 06:38:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2024-11-09 06:38:45,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262814566] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:38:45,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1373173211] [2024-11-09 06:38:45,360 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-09 06:38:45,360 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:38:45,361 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:38:45,361 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:38:45,361 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:38:46,120 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:38:47,119 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5455#(and (<= 2 ~SIZE~0) (= |ULTIMATE.start_main_~i~1#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) |ULTIMATE.start_main_~#set~0#1.offset|) |ULTIMATE.start_main_~element~0#1|))' at error location [2024-11-09 06:38:47,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:38:47,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:38:47,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 12] total 40 [2024-11-09 06:38:47,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379031874] [2024-11-09 06:38:47,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:38:47,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-09 06:38:47,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:47,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-09 06:38:47,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2477, Unknown=2, NotChecked=0, Total=2862 [2024-11-09 06:38:47,123 INFO L87 Difference]: Start difference. First operand 194 states and 241 transitions. Second operand has 40 states, 40 states have (on average 2.7) internal successors, (108), 40 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:51,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:38:53,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:38:55,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-09 06:38:57,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-09 06:39:03,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-09 06:39:06,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-09 06:39:08,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-09 06:39:10,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-09 06:39:12,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-09 06:39:15,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-09 06:39:15,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:39:15,306 INFO L93 Difference]: Finished difference Result 423 states and 521 transitions. [2024-11-09 06:39:15,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-09 06:39:15,308 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.7) internal successors, (108), 40 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2024-11-09 06:39:15,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:39:15,309 INFO L225 Difference]: With dead ends: 423 [2024-11-09 06:39:15,309 INFO L226 Difference]: Without dead ends: 267 [2024-11-09 06:39:15,311 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 227 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=539, Invalid=3617, Unknown=4, NotChecked=0, Total=4160 [2024-11-09 06:39:15,312 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 65 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 23 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:39:15,313 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 202 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 567 Invalid, 13 Unknown, 0 Unchecked, 23.2s Time] [2024-11-09 06:39:15,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-11-09 06:39:15,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 231. [2024-11-09 06:39:15,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.208695652173913) internal successors, (278), 230 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:39:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 278 transitions. [2024-11-09 06:39:15,364 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 278 transitions. Word has length 90 [2024-11-09 06:39:15,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:39:15,365 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 278 transitions. [2024-11-09 06:39:15,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.7) internal successors, (108), 40 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:39:15,366 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 278 transitions. [2024-11-09 06:39:15,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-09 06:39:15,367 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:39:15,367 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 6, 6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:39:15,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 06:39:15,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:39:15,568 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:39:15,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:39:15,569 INFO L85 PathProgramCache]: Analyzing trace with hash 2088199822, now seen corresponding path program 1 times [2024-11-09 06:39:15,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:39:15,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637738899] [2024-11-09 06:39:15,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:39:15,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:39:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:39:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-09 06:39:16,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:39:16,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637738899] [2024-11-09 06:39:16,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637738899] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:39:16,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873392242] [2024-11-09 06:39:16,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:39:16,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:39:16,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:39:16,599 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:39:16,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 06:39:16,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:39:16,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 06:39:16,864 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:39:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-09 06:39:17,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:39:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-09 06:39:18,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873392242] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:39:18,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1414844262] [2024-11-09 06:39:18,287 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:39:18,287 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:39:18,288 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:39:18,288 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:39:18,288 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:39:18,998 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:39:20,031 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7046#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 2 ~SIZE~0))' at error location [2024-11-09 06:39:20,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:39:20,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:39:20,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2024-11-09 06:39:20,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885614732] [2024-11-09 06:39:20,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:39:20,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-09 06:39:20,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:39:20,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-09 06:39:20,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1787, Invalid=4218, Unknown=1, NotChecked=0, Total=6006 [2024-11-09 06:39:20,035 INFO L87 Difference]: Start difference. First operand 231 states and 278 transitions. Second operand has 62 states, 62 states have (on average 2.338709677419355) internal successors, (145), 61 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:39:20,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:39:20,421 INFO L93 Difference]: Finished difference Result 467 states and 582 transitions. [2024-11-09 06:39:20,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-09 06:39:20,422 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.338709677419355) internal successors, (145), 61 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2024-11-09 06:39:20,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:39:20,423 INFO L225 Difference]: With dead ends: 467 [2024-11-09 06:39:20,423 INFO L226 Difference]: Without dead ends: 276 [2024-11-09 06:39:20,425 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 222 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3284 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1787, Invalid=4218, Unknown=1, NotChecked=0, Total=6006 [2024-11-09 06:39:20,426 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:39:20,426 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 99 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:39:20,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2024-11-09 06:39:20,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 273. [2024-11-09 06:39:20,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.1764705882352942) internal successors, (320), 272 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:39:20,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 320 transitions. [2024-11-09 06:39:20,484 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 320 transitions. Word has length 96 [2024-11-09 06:39:20,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:39:20,485 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 320 transitions. [2024-11-09 06:39:20,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.338709677419355) internal successors, (145), 61 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:39:20,485 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 320 transitions. [2024-11-09 06:39:20,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 06:39:20,486 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:39:20,486 INFO L215 NwaCegarLoop]: trace histogram [40, 40, 6, 6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:39:20,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 06:39:20,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:39:20,687 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:39:20,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:39:20,688 INFO L85 PathProgramCache]: Analyzing trace with hash -524529723, now seen corresponding path program 2 times [2024-11-09 06:39:20,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:39:20,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127666199] [2024-11-09 06:39:20,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:39:20,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:39:20,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:39:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1692 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-09 06:39:23,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:39:23,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127666199] [2024-11-09 06:39:23,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127666199] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:39:23,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281733232] [2024-11-09 06:39:23,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:39:23,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:39:23,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:39:23,348 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:39:23,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 06:39:23,650 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 06:39:23,650 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:39:23,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 06:39:23,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:39:23,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2024-11-09 06:39:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1692 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1679 trivial. 0 not checked. [2024-11-09 06:39:24,127 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:39:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1692 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1679 trivial. 0 not checked. [2024-11-09 06:39:24,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281733232] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:39:24,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1526515485] [2024-11-09 06:39:24,705 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:39:24,705 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:39:24,705 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:39:24,705 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:39:24,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:39:25,601 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:39:26,938 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9006#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 2 ~SIZE~0))' at error location [2024-11-09 06:39:26,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:39:26,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:39:26,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 10, 10] total 59 [2024-11-09 06:39:26,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548871415] [2024-11-09 06:39:26,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:39:26,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-09 06:39:26,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:39:26,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-09 06:39:26,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1510, Invalid=4188, Unknown=2, NotChecked=0, Total=5700 [2024-11-09 06:39:26,943 INFO L87 Difference]: Start difference. First operand 273 states and 320 transitions. Second operand has 60 states, 60 states have (on average 2.7333333333333334) internal successors, (164), 59 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:39:36,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:39:36,123 INFO L93 Difference]: Finished difference Result 946 states and 1139 transitions. [2024-11-09 06:39:36,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2024-11-09 06:39:36,124 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.7333333333333334) internal successors, (164), 59 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2024-11-09 06:39:36,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:39:36,128 INFO L225 Difference]: With dead ends: 946 [2024-11-09 06:39:36,128 INFO L226 Difference]: Without dead ends: 753 [2024-11-09 06:39:36,137 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 371 SyntacticMatches, 9 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13374 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=11844, Invalid=31610, Unknown=18, NotChecked=0, Total=43472 [2024-11-09 06:39:36,138 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 2167 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 757 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2167 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 757 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:39:36,139 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2167 Valid, 212 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [757 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 06:39:36,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2024-11-09 06:39:36,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 443. [2024-11-09 06:39:36,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.169683257918552) internal successors, (517), 442 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:39:36,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 517 transitions. [2024-11-09 06:39:36,266 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 517 transitions. Word has length 138 [2024-11-09 06:39:36,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:39:36,267 INFO L471 AbstractCegarLoop]: Abstraction has 443 states and 517 transitions. [2024-11-09 06:39:36,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.7333333333333334) internal successors, (164), 59 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:39:36,268 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 517 transitions. [2024-11-09 06:39:36,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-11-09 06:39:36,270 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:39:36,270 INFO L215 NwaCegarLoop]: trace histogram [44, 44, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:39:36,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 06:39:36,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:39:36,471 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:39:36,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:39:36,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1927201919, now seen corresponding path program 3 times [2024-11-09 06:39:36,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:39:36,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914800046] [2024-11-09 06:39:36,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:39:36,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:39:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:39:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2040 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2024-11-09 06:39:39,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:39:39,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914800046] [2024-11-09 06:39:39,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914800046] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:39:39,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572514652] [2024-11-09 06:39:39,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:39:39,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:39:39,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:39:39,298 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:39:39,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 06:39:39,585 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:39:39,585 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:39:39,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-09 06:39:39,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:39:40,423 INFO L349 Elim1Store]: treesize reduction 102, result has 26.1 percent of original size [2024-11-09 06:39:40,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 47 [2024-11-09 06:39:40,568 INFO L349 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2024-11-09 06:39:40,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 29 [2024-11-09 06:39:40,690 INFO L349 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2024-11-09 06:39:40,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 29 [2024-11-09 06:39:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2040 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2012 trivial. 0 not checked. [2024-11-09 06:39:41,067 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:40:02,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 66 [2024-11-09 06:40:02,235 INFO L349 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2024-11-09 06:40:02,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2645 treesize of output 1803 [2024-11-09 06:40:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2040 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2012 trivial. 0 not checked. [2024-11-09 06:40:02,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572514652] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:40:02,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [990521834] [2024-11-09 06:40:02,399 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:40:02,400 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:40:02,400 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:40:02,400 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:40:02,400 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:40:04,076 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:40:07,465 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12198#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 2 ~SIZE~0))' at error location [2024-11-09 06:40:07,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:40:07,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:40:07,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 17, 16] total 73 [2024-11-09 06:40:07,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6749989] [2024-11-09 06:40:07,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:40:07,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-09 06:40:07,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:40:07,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-09 06:40:07,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=7036, Unknown=10, NotChecked=0, Total=8372 [2024-11-09 06:40:07,469 INFO L87 Difference]: Start difference. First operand 443 states and 517 transitions. Second operand has 73 states, 73 states have (on average 2.4246575342465753) internal successors, (177), 73 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:40:09,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:40:12,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-09 06:40:29,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-09 06:40:33,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-09 06:40:35,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-09 06:40:37,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-09 06:40:40,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-09 06:40:40,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:40:40,375 INFO L93 Difference]: Finished difference Result 942 states and 1096 transitions. [2024-11-09 06:40:40,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-11-09 06:40:40,376 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.4246575342465753) internal successors, (177), 73 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2024-11-09 06:40:40,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:40:40,379 INFO L225 Difference]: With dead ends: 942 [2024-11-09 06:40:40,379 INFO L226 Difference]: Without dead ends: 589 [2024-11-09 06:40:40,381 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 401 SyntacticMatches, 3 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3414 ImplicationChecksByTransitivity, 39.3s TimeCoverageRelationStatistics Valid=1690, Invalid=10727, Unknown=15, NotChecked=0, Total=12432 [2024-11-09 06:40:40,382 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 61 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 32 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:40:40,382 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 367 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1127 Invalid, 14 Unknown, 0 Unchecked, 19.7s Time] [2024-11-09 06:40:40,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2024-11-09 06:40:40,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 540. [2024-11-09 06:40:40,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 1.1410018552875696) internal successors, (615), 539 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:40:40,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 615 transitions. [2024-11-09 06:40:40,524 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 615 transitions. Word has length 150 [2024-11-09 06:40:40,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:40:40,524 INFO L471 AbstractCegarLoop]: Abstraction has 540 states and 615 transitions. [2024-11-09 06:40:40,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.4246575342465753) internal successors, (177), 73 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:40:40,525 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 615 transitions. [2024-11-09 06:40:40,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-11-09 06:40:40,527 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:40:40,527 INFO L215 NwaCegarLoop]: trace histogram [45, 45, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:40:40,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 06:40:40,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 06:40:40,728 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:40:40,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:40:40,729 INFO L85 PathProgramCache]: Analyzing trace with hash 128497539, now seen corresponding path program 4 times [2024-11-09 06:40:40,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:40:40,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507960975] [2024-11-09 06:40:40,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:40:40,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:40:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:40:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2136 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-11-09 06:40:43,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:40:43,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507960975] [2024-11-09 06:40:43,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507960975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:40:43,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924636641] [2024-11-09 06:40:43,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:40:43,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:40:43,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:40:43,983 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:40:43,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 06:40:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:40:44,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 06:40:44,416 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:40:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2136 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-11-09 06:40:46,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:40:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2136 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-11-09 06:40:49,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924636641] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:40:49,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [891297470] [2024-11-09 06:40:49,877 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:40:49,877 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:40:49,877 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:40:49,877 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:40:49,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:40:50,525 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:40:52,006 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15486#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 2 ~SIZE~0))' at error location [2024-11-09 06:40:52,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:40:52,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:40:52,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 139 [2024-11-09 06:40:52,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601613232] [2024-11-09 06:40:52,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:40:52,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2024-11-09 06:40:52,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:40:52,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2024-11-09 06:40:52,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8807, Invalid=15373, Unknown=0, NotChecked=0, Total=24180 [2024-11-09 06:40:52,015 INFO L87 Difference]: Start difference. First operand 540 states and 615 transitions. Second operand has 140 states, 140 states have (on average 2.15) internal successors, (301), 139 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:40:52,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:40:52,965 INFO L93 Difference]: Finished difference Result 1086 states and 1283 transitions. [2024-11-09 06:40:52,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-11-09 06:40:52,966 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.15) internal successors, (301), 139 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2024-11-09 06:40:52,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:40:52,969 INFO L225 Difference]: With dead ends: 1086 [2024-11-09 06:40:52,969 INFO L226 Difference]: Without dead ends: 638 [2024-11-09 06:40:52,971 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 349 SyntacticMatches, 10 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12519 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=8807, Invalid=15373, Unknown=0, NotChecked=0, Total=24180 [2024-11-09 06:40:52,972 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:40:52,973 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 91 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:40:52,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2024-11-09 06:40:53,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 634. [2024-11-09 06:40:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 1.1200631911532386) internal successors, (709), 633 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:40:53,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 709 transitions. [2024-11-09 06:40:53,178 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 709 transitions. Word has length 156 [2024-11-09 06:40:53,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:40:53,178 INFO L471 AbstractCegarLoop]: Abstraction has 634 states and 709 transitions. [2024-11-09 06:40:53,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.15) internal successors, (301), 139 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:40:53,179 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 709 transitions. [2024-11-09 06:40:53,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2024-11-09 06:40:53,183 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:40:53,183 INFO L215 NwaCegarLoop]: trace histogram [92, 92, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:40:53,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 06:40:53,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 06:40:53,384 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:40:53,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:40:53,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1706701752, now seen corresponding path program 5 times [2024-11-09 06:40:53,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:40:53,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160245659] [2024-11-09 06:40:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:40:53,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:40:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:41:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8575 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-11-09 06:41:02,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:41:02,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160245659] [2024-11-09 06:41:02,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160245659] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:41:02,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300351744] [2024-11-09 06:41:02,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:41:02,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:41:02,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:41:02,675 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:41:02,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 06:41:03,365 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 06:41:03,365 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:41:03,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 06:41:03,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:41:03,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2024-11-09 06:41:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8575 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 8550 trivial. 0 not checked. [2024-11-09 06:41:04,077 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:41:04,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2024-11-09 06:41:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8575 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 8550 trivial. 0 not checked. [2024-11-09 06:41:05,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300351744] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:41:05,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1518095929] [2024-11-09 06:41:05,749 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:41:05,749 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:41:05,750 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:41:05,750 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:41:05,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:41:07,418 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:41:10,650 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19639#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 2 ~SIZE~0))' at error location [2024-11-09 06:41:10,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:41:10,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:41:10,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 11, 11] total 114 [2024-11-09 06:41:10,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460706565] [2024-11-09 06:41:10,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:41:10,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2024-11-09 06:41:10,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:41:10,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2024-11-09 06:41:10,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6093, Invalid=11461, Unknown=2, NotChecked=0, Total=17556 [2024-11-09 06:41:10,653 INFO L87 Difference]: Start difference. First operand 634 states and 709 transitions. Second operand has 115 states, 115 states have (on average 2.391304347826087) internal successors, (275), 114 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:41:48,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:41:48,578 INFO L93 Difference]: Finished difference Result 2487 states and 3023 transitions. [2024-11-09 06:41:48,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 309 states. [2024-11-09 06:41:48,579 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.391304347826087) internal successors, (275), 114 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 250 [2024-11-09 06:41:48,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:41:48,587 INFO L225 Difference]: With dead ends: 2487 [2024-11-09 06:41:48,587 INFO L226 Difference]: Without dead ends: 2039 [2024-11-09 06:41:48,649 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1139 GetRequests, 708 SyntacticMatches, 3 SemanticMatches, 428 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59235 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=53728, Invalid=130740, Unknown=2, NotChecked=0, Total=184470 [2024-11-09 06:41:48,650 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 4609 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 1590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4609 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 2628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1590 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:41:48,650 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4609 Valid, 386 Invalid, 2628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1590 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-09 06:41:48,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2024-11-09 06:41:48,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 1074. [2024-11-09 06:41:48,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 1.1202236719478098) internal successors, (1202), 1073 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:41:48,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1202 transitions. [2024-11-09 06:41:48,980 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1202 transitions. Word has length 250 [2024-11-09 06:41:48,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:41:48,981 INFO L471 AbstractCegarLoop]: Abstraction has 1074 states and 1202 transitions. [2024-11-09 06:41:48,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.391304347826087) internal successors, (275), 114 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:41:48,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1202 transitions. [2024-11-09 06:41:48,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2024-11-09 06:41:48,986 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:41:48,986 INFO L215 NwaCegarLoop]: trace histogram [100, 100, 6, 6, 6, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:41:49,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 06:41:49,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 06:41:49,187 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:41:49,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:41:49,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1736906976, now seen corresponding path program 6 times [2024-11-09 06:41:49,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:41:49,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482337660] [2024-11-09 06:41:49,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:41:49,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:41:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:41:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 0 proven. 10000 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-11-09 06:41:59,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:41:59,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482337660] [2024-11-09 06:41:59,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482337660] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:41:59,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861832982] [2024-11-09 06:41:59,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:41:59,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:41:59,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:41:59,332 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:41:59,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2846d1aa-fb35-4178-95ca-5ba64ac20684/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 06:41:59,878 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:41:59,879 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:41:59,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-09 06:41:59,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:42:00,915 INFO L349 Elim1Store]: treesize reduction 78, result has 43.5 percent of original size [2024-11-09 06:42:00,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 90 [2024-11-09 06:42:01,651 INFO L349 Elim1Store]: treesize reduction 54, result has 34.9 percent of original size [2024-11-09 06:42:01,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 58 [2024-11-09 06:42:02,085 INFO L349 Elim1Store]: treesize reduction 78, result has 43.5 percent of original size [2024-11-09 06:42:02,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 112 [2024-11-09 06:42:21,245 WARN L286 SmtUtils]: Spent 17.19s on a formula simplification. DAG size of input: 820 DAG size of output: 763 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-09 06:42:21,246 INFO L349 Elim1Store]: treesize reduction 430, result has 77.6 percent of original size [2024-11-09 06:42:21,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 171 case distinctions, treesize of input 472 treesize of output 1709