./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/rev-3-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/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_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/rev-3-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/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_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/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 fe3cf414f0e241a9a4e73e59647cf6619ea50b905df4a1c2a404b3413992b780 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:43:17,181 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:43:17,289 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:43:17,296 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:43:17,296 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:43:17,349 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:43:17,349 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:43:17,352 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:43:17,353 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:43:17,354 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:43:17,355 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:43:17,356 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:43:17,356 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:43:17,359 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:43:17,360 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:43:17,361 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:43:17,361 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:43:17,361 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:43:17,362 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:43:17,362 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:43:17,362 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:43:17,363 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:43:17,364 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:43:17,364 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:43:17,365 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:43:17,365 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:43:17,366 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:43:17,366 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:43:17,370 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:43:17,371 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:43:17,371 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:43:17,371 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:43:17,372 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:43:17,372 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:43:17,372 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:43:17,373 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:43:17,373 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:43:17,373 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:43:17,374 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:43:17,377 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:43:17,377 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:43:17,378 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:43:17,379 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:43:17,379 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:43:17,380 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:43:17,381 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:43:17,381 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:43:17,382 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_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe3cf414f0e241a9a4e73e59647cf6619ea50b905df4a1c2a404b3413992b780 [2024-11-09 05:43:17,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:43:17,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:43:17,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:43:17,704 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:43:17,705 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:43:17,706 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-multidimensional/rev-3-u.c Unable to find full path for "g++" [2024-11-09 05:43:19,815 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:43:20,046 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:43:20,046 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/sv-benchmarks/c/array-multidimensional/rev-3-u.c [2024-11-09 05:43:20,053 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/data/54fab56fd/a4b024a66a2f4a2a8ae1752221cd40ed/FLAG1ccfc2fd0 [2024-11-09 05:43:20,385 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/data/54fab56fd/a4b024a66a2f4a2a8ae1752221cd40ed [2024-11-09 05:43:20,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:43:20,388 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:43:20,389 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:43:20,389 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:43:20,398 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:43:20,398 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:43:20" (1/1) ... [2024-11-09 05:43:20,400 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2876206f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:20, skipping insertion in model container [2024-11-09 05:43:20,400 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:43:20" (1/1) ... [2024-11-09 05:43:20,425 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:43:20,629 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_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/sv-benchmarks/c/array-multidimensional/rev-3-u.c[319,332] [2024-11-09 05:43:20,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:43:20,671 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:43:20,681 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_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/sv-benchmarks/c/array-multidimensional/rev-3-u.c[319,332] [2024-11-09 05:43:20,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:43:20,711 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:43:20,711 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:20 WrapperNode [2024-11-09 05:43:20,712 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:43:20,712 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:43:20,713 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:43:20,713 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:43:20,721 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:20" (1/1) ... [2024-11-09 05:43:20,729 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:20" (1/1) ... [2024-11-09 05:43:20,751 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 97 [2024-11-09 05:43:20,751 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:43:20,752 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:43:20,752 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:43:20,753 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:43:20,762 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:20" (1/1) ... [2024-11-09 05:43:20,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:20" (1/1) ... [2024-11-09 05:43:20,765 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:20" (1/1) ... [2024-11-09 05:43:20,765 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:20" (1/1) ... [2024-11-09 05:43:20,770 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:20" (1/1) ... [2024-11-09 05:43:20,774 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:20" (1/1) ... [2024-11-09 05:43:20,776 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:20" (1/1) ... [2024-11-09 05:43:20,777 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:20" (1/1) ... [2024-11-09 05:43:20,779 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:43:20,780 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:43:20,781 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:43:20,781 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:43:20,782 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:20" (1/1) ... [2024-11-09 05:43:20,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:43:20,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:20,824 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:43:20,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:43:20,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:43:20,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:43:20,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 05:43:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 05:43:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:43:20,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:43:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 05:43:20,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 05:43:20,963 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:43:20,966 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:43:21,306 INFO L? ?]: Removed 36 outVars from TransFormulas that were not future-live. [2024-11-09 05:43:21,307 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:43:21,368 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:43:21,368 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 05:43:21,369 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:43:21 BoogieIcfgContainer [2024-11-09 05:43:21,369 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:43:21,372 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:43:21,372 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:43:21,376 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:43:21,376 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:43:20" (1/3) ... [2024-11-09 05:43:21,377 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d047e45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:43:21, skipping insertion in model container [2024-11-09 05:43:21,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:20" (2/3) ... [2024-11-09 05:43:21,378 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d047e45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:43:21, skipping insertion in model container [2024-11-09 05:43:21,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:43:21" (3/3) ... [2024-11-09 05:43:21,380 INFO L112 eAbstractionObserver]: Analyzing ICFG rev-3-u.c [2024-11-09 05:43:21,401 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:43:21,402 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:43:21,493 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:43:21,503 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;@5b122ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:43:21,503 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:43:21,507 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 32 states have internal predecessors, (51), 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 05:43:21,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 05:43:21,514 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:21,514 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:21,515 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:43:21,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:21,536 INFO L85 PathProgramCache]: Analyzing trace with hash 2116172156, now seen corresponding path program 1 times [2024-11-09 05:43:21,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:21,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120287428] [2024-11-09 05:43:21,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:21,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:43:21,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:21,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120287428] [2024-11-09 05:43:21,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120287428] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:43:21,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:43:21,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:43:21,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909272562] [2024-11-09 05:43:21,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:43:21,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:43:21,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:21,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:43:21,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:43:21,936 INFO L87 Difference]: Start difference. First operand has 33 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 32 states have internal predecessors, (51), 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 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 05:43:22,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:22,110 INFO L93 Difference]: Finished difference Result 65 states and 101 transitions. [2024-11-09 05:43:22,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:43:22,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 13 [2024-11-09 05:43:22,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:22,123 INFO L225 Difference]: With dead ends: 65 [2024-11-09 05:43:22,123 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 05:43:22,127 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 05:43:22,134 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:22,135 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 44 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:43:22,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 05:43:22,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2024-11-09 05:43:22,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.53125) internal successors, (49), 32 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 05:43:22,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2024-11-09 05:43:22,177 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 13 [2024-11-09 05:43:22,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:22,178 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2024-11-09 05:43:22,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 05:43:22,178 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2024-11-09 05:43:22,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 05:43:22,179 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:22,179 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:22,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:43:22,180 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:43:22,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:22,181 INFO L85 PathProgramCache]: Analyzing trace with hash 93590371, now seen corresponding path program 1 times [2024-11-09 05:43:22,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:22,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490591957] [2024-11-09 05:43:22,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:22,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:43:22,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:22,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490591957] [2024-11-09 05:43:22,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490591957] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:43:22,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:43:22,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:43:22,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876785353] [2024-11-09 05:43:22,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:43:22,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:43:22,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:22,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:43:22,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:43:22,337 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 05:43:22,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:22,501 INFO L93 Difference]: Finished difference Result 82 states and 126 transitions. [2024-11-09 05:43:22,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:43:22,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 17 [2024-11-09 05:43:22,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:22,503 INFO L225 Difference]: With dead ends: 82 [2024-11-09 05:43:22,503 INFO L226 Difference]: Without dead ends: 52 [2024-11-09 05:43:22,504 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 05:43:22,505 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 67 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:22,506 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 18 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:43:22,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-09 05:43:22,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2024-11-09 05:43:22,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 38 states have internal predecessors, (55), 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 05:43:22,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 55 transitions. [2024-11-09 05:43:22,517 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 55 transitions. Word has length 17 [2024-11-09 05:43:22,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:22,518 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 55 transitions. [2024-11-09 05:43:22,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 05:43:22,519 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 55 transitions. [2024-11-09 05:43:22,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 05:43:22,520 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:22,520 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] [2024-11-09 05:43:22,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 05:43:22,521 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:43:22,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:22,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1955923370, now seen corresponding path program 1 times [2024-11-09 05:43:22,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:22,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435926079] [2024-11-09 05:43:22,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:22,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:43:22,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:22,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435926079] [2024-11-09 05:43:22,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435926079] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:43:22,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:43:22,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:43:22,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574206902] [2024-11-09 05:43:22,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:43:22,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:43:22,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:22,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:43:22,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:43:22,717 INFO L87 Difference]: Start difference. First operand 39 states and 55 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 05:43:22,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:22,866 INFO L93 Difference]: Finished difference Result 85 states and 123 transitions. [2024-11-09 05:43:22,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:43:22,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 21 [2024-11-09 05:43:22,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:22,869 INFO L225 Difference]: With dead ends: 85 [2024-11-09 05:43:22,869 INFO L226 Difference]: Without dead ends: 49 [2024-11-09 05:43:22,870 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 05:43:22,871 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 59 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:22,872 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 22 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:43:22,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-09 05:43:22,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2024-11-09 05:43:22,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 44 states have internal predecessors, (61), 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 05:43:22,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2024-11-09 05:43:22,881 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 21 [2024-11-09 05:43:22,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:22,882 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2024-11-09 05:43:22,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 05:43:22,882 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2024-11-09 05:43:22,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-09 05:43:22,883 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:22,883 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:22,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 05:43:22,884 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:43:22,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:22,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1940160111, now seen corresponding path program 1 times [2024-11-09 05:43:22,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:22,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854893942] [2024-11-09 05:43:22,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:22,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 05:43:23,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:23,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854893942] [2024-11-09 05:43:23,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854893942] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:43:23,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:43:23,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:43:23,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476072315] [2024-11-09 05:43:23,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:43:23,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:43:23,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:23,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:43:23,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:43:23,123 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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 05:43:23,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:23,306 INFO L93 Difference]: Finished difference Result 100 states and 134 transitions. [2024-11-09 05:43:23,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:43:23,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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 23 [2024-11-09 05:43:23,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:23,307 INFO L225 Difference]: With dead ends: 100 [2024-11-09 05:43:23,308 INFO L226 Difference]: Without dead ends: 83 [2024-11-09 05:43:23,308 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 05:43:23,310 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 72 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:23,313 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 16 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:43:23,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-09 05:43:23,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 47. [2024-11-09 05:43:23,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 46 states have internal predecessors, (63), 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 05:43:23,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2024-11-09 05:43:23,335 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 23 [2024-11-09 05:43:23,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:23,336 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2024-11-09 05:43:23,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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 05:43:23,337 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2024-11-09 05:43:23,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 05:43:23,339 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:23,340 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:23,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 05:43:23,340 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:43:23,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:23,341 INFO L85 PathProgramCache]: Analyzing trace with hash -246014398, now seen corresponding path program 1 times [2024-11-09 05:43:23,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:23,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211936094] [2024-11-09 05:43:23,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:23,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 05:43:23,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:23,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211936094] [2024-11-09 05:43:23,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211936094] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:23,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346530793] [2024-11-09 05:43:23,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:23,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:23,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:23,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:23,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:43:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:23,637 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:43:23,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 05:43:23,759 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:43:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 05:43:23,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346530793] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:43:23,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1015978407] [2024-11-09 05:43:23,863 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-09 05:43:23,863 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:43:23,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:43:23,874 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:43:23,875 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:43:27,136 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:43:27,725 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '913#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* (* |ULTIMATE.start_main_~n~0#1| 4) (+ (- 1) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (- 4) (* |ULTIMATE.start_main_~n~0#1| 4) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (+ (- 1) |ULTIMATE.start_main_~n~0#1|)))) (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|))) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 05:43:27,726 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:43:27,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:43:27,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-09 05:43:27,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734783673] [2024-11-09 05:43:27,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:43:27,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 05:43:27,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:27,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 05:43:27,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2024-11-09 05:43:27,728 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 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 05:43:27,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:27,964 INFO L93 Difference]: Finished difference Result 118 states and 165 transitions. [2024-11-09 05:43:27,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:43:27,965 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 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 33 [2024-11-09 05:43:27,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:27,967 INFO L225 Difference]: With dead ends: 118 [2024-11-09 05:43:27,968 INFO L226 Difference]: Without dead ends: 74 [2024-11-09 05:43:27,969 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2024-11-09 05:43:27,970 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 144 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:27,970 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 50 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:43:27,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-09 05:43:27,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2024-11-09 05:43:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 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 05:43:27,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2024-11-09 05:43:27,981 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 33 [2024-11-09 05:43:27,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:27,981 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2024-11-09 05:43:27,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 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 05:43:27,981 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2024-11-09 05:43:27,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 05:43:27,982 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:27,983 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:28,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:43:28,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:28,184 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:43:28,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:28,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1996472448, now seen corresponding path program 2 times [2024-11-09 05:43:28,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:28,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329792397] [2024-11-09 05:43:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:28,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:28,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 05:43:28,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:28,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329792397] [2024-11-09 05:43:28,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329792397] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:28,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108695163] [2024-11-09 05:43:28,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:43:28,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:28,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:28,451 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:28,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:43:28,548 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 05:43:28,549 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:43:28,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:43:28,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:28,661 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 05:43:28,662 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:43:28,741 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 05:43:28,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108695163] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:43:28,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1103697284] [2024-11-09 05:43:28,745 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-09 05:43:28,748 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:43:28,749 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:43:28,749 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:43:28,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:43:31,572 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:43:33,794 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1463#(and (= |ULTIMATE.start_main_~i~0#1| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_88| Int)) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_88|)) (= |ULTIMATE.start_main_~k~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* (* |ULTIMATE.start_main_~n~0#1| 4) (+ (- 1) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (- 4) (* |ULTIMATE.start_main_~n~0#1| 4) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (+ (- 1) |ULTIMATE.start_main_~n~0#1|)))) (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|))) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 05:43:33,794 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:43:33,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:43:33,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 3] total 11 [2024-11-09 05:43:33,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627488967] [2024-11-09 05:43:33,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:43:33,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 05:43:33,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:33,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 05:43:33,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2024-11-09 05:43:33,798 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 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 05:43:34,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:34,742 INFO L93 Difference]: Finished difference Result 407 states and 485 transitions. [2024-11-09 05:43:34,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 05:43:34,743 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 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 45 [2024-11-09 05:43:34,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:34,747 INFO L225 Difference]: With dead ends: 407 [2024-11-09 05:43:34,747 INFO L226 Difference]: Without dead ends: 342 [2024-11-09 05:43:34,752 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=508, Invalid=2248, Unknown=0, NotChecked=0, Total=2756 [2024-11-09 05:43:34,752 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 854 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:34,753 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [854 Valid, 56 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:43:34,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-11-09 05:43:34,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 188. [2024-11-09 05:43:34,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.1818181818181819) internal successors, (221), 187 states have internal predecessors, (221), 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 05:43:34,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 221 transitions. [2024-11-09 05:43:34,798 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 221 transitions. Word has length 45 [2024-11-09 05:43:34,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:34,798 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 221 transitions. [2024-11-09 05:43:34,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 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 05:43:34,799 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 221 transitions. [2024-11-09 05:43:34,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2024-11-09 05:43:34,806 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:34,806 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:34,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 05:43:35,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 05:43:35,009 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:43:35,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:35,009 INFO L85 PathProgramCache]: Analyzing trace with hash -627306188, now seen corresponding path program 3 times [2024-11-09 05:43:35,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:35,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709572813] [2024-11-09 05:43:35,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:35,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:35,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 200 proven. 25 refuted. 0 times theorem prover too weak. 831 trivial. 0 not checked. [2024-11-09 05:43:35,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:35,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709572813] [2024-11-09 05:43:35,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709572813] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:35,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658796726] [2024-11-09 05:43:35,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:43:35,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:35,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:35,604 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:35,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:43:35,774 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:43:35,775 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:43:35,777 INFO L255 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 05:43:35,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:35,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 88 proven. 202 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2024-11-09 05:43:35,970 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:43:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 88 proven. 202 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2024-11-09 05:43:36,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658796726] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:43:36,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [566606003] [2024-11-09 05:43:36,139 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-09 05:43:36,140 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:43:36,140 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:43:36,140 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:43:36,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:43:38,219 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:43:39,818 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3292#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* (* |ULTIMATE.start_main_~n~0#1| 4) (+ (- 1) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (- 4) (* |ULTIMATE.start_main_~n~0#1| 4) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (+ (- 1) |ULTIMATE.start_main_~n~0#1|)))) (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|))) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 05:43:39,818 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:43:39,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:43:39,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2024-11-09 05:43:39,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669599626] [2024-11-09 05:43:39,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:43:39,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 05:43:39,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:39,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 05:43:39,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1022, Unknown=1, NotChecked=0, Total=1190 [2024-11-09 05:43:39,822 INFO L87 Difference]: Start difference. First operand 188 states and 221 transitions. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 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 05:43:40,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:40,780 INFO L93 Difference]: Finished difference Result 758 states and 883 transitions. [2024-11-09 05:43:40,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 05:43:40,781 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 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 157 [2024-11-09 05:43:40,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:40,783 INFO L225 Difference]: With dead ends: 758 [2024-11-09 05:43:40,783 INFO L226 Difference]: Without dead ends: 575 [2024-11-09 05:43:40,785 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 441 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=445, Invalid=2416, Unknown=1, NotChecked=0, Total=2862 [2024-11-09 05:43:40,786 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 596 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:40,786 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 68 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:43:40,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2024-11-09 05:43:40,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 364. [2024-11-09 05:43:40,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 1.137741046831956) internal successors, (413), 363 states have internal predecessors, (413), 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 05:43:40,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 413 transitions. [2024-11-09 05:43:40,832 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 413 transitions. Word has length 157 [2024-11-09 05:43:40,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:40,833 INFO L471 AbstractCegarLoop]: Abstraction has 364 states and 413 transitions. [2024-11-09 05:43:40,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 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 05:43:40,833 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 413 transitions. [2024-11-09 05:43:40,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2024-11-09 05:43:40,839 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:40,839 INFO L215 NwaCegarLoop]: trace histogram [48, 48, 48, 48, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:40,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:43:41,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:41,044 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:43:41,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:41,045 INFO L85 PathProgramCache]: Analyzing trace with hash -572212988, now seen corresponding path program 4 times [2024-11-09 05:43:41,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:41,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982345355] [2024-11-09 05:43:41,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:41,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:42,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5624 backedges. 620 proven. 36 refuted. 0 times theorem prover too weak. 4968 trivial. 0 not checked. [2024-11-09 05:43:42,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:42,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982345355] [2024-11-09 05:43:42,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982345355] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:42,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078389808] [2024-11-09 05:43:42,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:43:42,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:42,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:42,246 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:42,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:43:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:42,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:43:42,673 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:42,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5624 backedges. 620 proven. 36 refuted. 0 times theorem prover too weak. 4968 trivial. 0 not checked. [2024-11-09 05:43:42,837 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:43:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5624 backedges. 620 proven. 36 refuted. 0 times theorem prover too weak. 4968 trivial. 0 not checked. [2024-11-09 05:43:43,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078389808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:43:43,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [649405959] [2024-11-09 05:43:43,011 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-09 05:43:43,012 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:43:43,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:43:43,012 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:43:43,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:43:44,820 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:43:46,120 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6768#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* (* |ULTIMATE.start_main_~n~0#1| 4) (+ (- 1) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (- 4) (* |ULTIMATE.start_main_~n~0#1| 4) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (+ (- 1) |ULTIMATE.start_main_~n~0#1|)))) (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|))) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 05:43:46,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:43:46,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:43:46,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-09 05:43:46,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129186753] [2024-11-09 05:43:46,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:43:46,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 05:43:46,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:46,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 05:43:46,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1515, Unknown=1, NotChecked=0, Total=1892 [2024-11-09 05:43:46,125 INFO L87 Difference]: Start difference. First operand 364 states and 413 transitions. Second operand has 25 states, 25 states have (on average 3.28) internal successors, (82), 24 states have internal predecessors, (82), 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 05:43:46,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:46,822 INFO L93 Difference]: Finished difference Result 1056 states and 1300 transitions. [2024-11-09 05:43:46,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 05:43:46,823 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.28) internal successors, (82), 24 states have internal predecessors, (82), 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 301 [2024-11-09 05:43:46,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:46,827 INFO L225 Difference]: With dead ends: 1056 [2024-11-09 05:43:46,827 INFO L226 Difference]: Without dead ends: 710 [2024-11-09 05:43:46,829 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 917 GetRequests, 868 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=509, Invalid=2040, Unknown=1, NotChecked=0, Total=2550 [2024-11-09 05:43:46,830 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 452 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:46,831 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 91 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:43:46,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2024-11-09 05:43:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 684. [2024-11-09 05:43:46,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 1.0966325036603222) internal successors, (749), 683 states have internal predecessors, (749), 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 05:43:46,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 749 transitions. [2024-11-09 05:43:46,895 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 749 transitions. Word has length 301 [2024-11-09 05:43:46,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:46,896 INFO L471 AbstractCegarLoop]: Abstraction has 684 states and 749 transitions. [2024-11-09 05:43:46,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.28) internal successors, (82), 24 states have internal predecessors, (82), 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 05:43:46,896 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 749 transitions. [2024-11-09 05:43:46,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2024-11-09 05:43:46,916 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:46,916 INFO L215 NwaCegarLoop]: trace histogram [112, 112, 112, 112, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:46,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 05:43:47,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:47,118 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:43:47,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:47,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1908700036, now seen corresponding path program 5 times [2024-11-09 05:43:47,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:47,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362311207] [2024-11-09 05:43:47,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:47,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 27000 backedges. 2972 proven. 196 refuted. 0 times theorem prover too weak. 23832 trivial. 0 not checked. [2024-11-09 05:43:50,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:50,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362311207] [2024-11-09 05:43:50,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362311207] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:50,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431289174] [2024-11-09 05:43:50,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:43:50,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:50,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:50,673 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:50,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:43:51,077 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 05:43:51,077 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:43:51,080 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 05:43:51,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 27000 backedges. 5110 proven. 426 refuted. 0 times theorem prover too weak. 21464 trivial. 0 not checked. [2024-11-09 05:43:52,223 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:43:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 27000 backedges. 7 proven. 5529 refuted. 0 times theorem prover too weak. 21464 trivial. 0 not checked. [2024-11-09 05:43:53,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431289174] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:43:53,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [964153605] [2024-11-09 05:43:53,180 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-09 05:43:53,183 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:43:53,183 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:43:53,183 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:43:53,184 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:43:54,760 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:43:56,031 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12673#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* (* |ULTIMATE.start_main_~n~0#1| 4) (+ (- 1) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (- 4) (* |ULTIMATE.start_main_~n~0#1| 4) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (+ (- 1) |ULTIMATE.start_main_~n~0#1|)))) (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|))) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 05:43:56,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:43:56,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:43:56,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 24 [2024-11-09 05:43:56,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910811407] [2024-11-09 05:43:56,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:43:56,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 05:43:56,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:56,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 05:43:56,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1518, Unknown=1, NotChecked=0, Total=1806 [2024-11-09 05:43:56,035 INFO L87 Difference]: Start difference. First operand 684 states and 749 transitions. Second operand has 25 states, 25 states have (on average 5.44) internal successors, (136), 24 states have internal predecessors, (136), 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 05:44:01,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:44:01,837 INFO L93 Difference]: Finished difference Result 2965 states and 3220 transitions. [2024-11-09 05:44:01,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2024-11-09 05:44:01,838 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.44) internal successors, (136), 24 states have internal predecessors, (136), 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 557 [2024-11-09 05:44:01,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:44:01,850 INFO L225 Difference]: With dead ends: 2965 [2024-11-09 05:44:01,851 INFO L226 Difference]: Without dead ends: 2315 [2024-11-09 05:44:01,859 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1779 GetRequests, 1645 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6081 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=4380, Invalid=13979, Unknown=1, NotChecked=0, Total=18360 [2024-11-09 05:44:01,863 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 2835 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2835 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 05:44:01,864 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2835 Valid, 113 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 05:44:01,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2024-11-09 05:44:02,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2059. [2024-11-09 05:44:02,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2059 states, 2058 states have (on average 1.0753158406219632) internal successors, (2213), 2058 states have internal predecessors, (2213), 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 05:44:02,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 2213 transitions. [2024-11-09 05:44:02,146 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 2213 transitions. Word has length 557 [2024-11-09 05:44:02,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:44:02,147 INFO L471 AbstractCegarLoop]: Abstraction has 2059 states and 2213 transitions. [2024-11-09 05:44:02,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.44) internal successors, (136), 24 states have internal predecessors, (136), 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 05:44:02,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 2213 transitions. [2024-11-09 05:44:02,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1678 [2024-11-09 05:44:02,250 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:44:02,251 INFO L215 NwaCegarLoop]: trace histogram [360, 360, 360, 360, 24, 24, 24, 24, 24, 24, 24, 24, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:44:02,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 05:44:02,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-09 05:44:02,452 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:44:02,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:44:02,453 INFO L85 PathProgramCache]: Analyzing trace with hash 369467156, now seen corresponding path program 6 times [2024-11-09 05:44:02,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:44:02,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008895133] [2024-11-09 05:44:02,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:02,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:44:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 278216 backedges. 11120 proven. 225 refuted. 0 times theorem prover too weak. 266871 trivial. 0 not checked. [2024-11-09 05:44:10,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:44:10,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008895133] [2024-11-09 05:44:10,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008895133] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:44:10,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603619513] [2024-11-09 05:44:10,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:44:10,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:44:10,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:44:10,935 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:44:10,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:44:12,708 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:44:12,709 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:44:12,733 INFO L255 TraceCheckSpWp]: Trace formula consists of 3687 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 05:44:12,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:44:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 278216 backedges. 4863 proven. 59577 refuted. 0 times theorem prover too weak. 213776 trivial. 0 not checked. [2024-11-09 05:44:14,314 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:44:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 278216 backedges. 4863 proven. 59577 refuted. 0 times theorem prover too weak. 213776 trivial. 0 not checked. [2024-11-09 05:44:15,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603619513] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:44:15,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [7511468] [2024-11-09 05:44:15,983 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-09 05:44:15,983 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:44:15,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:44:15,983 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:44:15,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:44:18,171 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:44:19,399 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30165#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* (* |ULTIMATE.start_main_~n~0#1| 4) (+ (- 1) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (- 4) (* |ULTIMATE.start_main_~n~0#1| 4) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (+ (- 1) |ULTIMATE.start_main_~n~0#1|)))) (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|))) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 05:44:19,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:44:19,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:44:19,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 41 [2024-11-09 05:44:19,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933680190] [2024-11-09 05:44:19,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:44:19,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-09 05:44:19,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:44:19,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-09 05:44:19,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2779, Unknown=0, NotChecked=0, Total=3192 [2024-11-09 05:44:19,407 INFO L87 Difference]: Start difference. First operand 2059 states and 2213 transitions. Second operand has 41 states, 41 states have (on average 3.682926829268293) internal successors, (151), 41 states have internal predecessors, (151), 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 05:44:27,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:44:27,706 INFO L93 Difference]: Finished difference Result 5263 states and 5580 transitions. [2024-11-09 05:44:27,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2024-11-09 05:44:27,707 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.682926829268293) internal successors, (151), 41 states have internal predecessors, (151), 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 1677 [2024-11-09 05:44:27,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:44:27,722 INFO L225 Difference]: With dead ends: 5263 [2024-11-09 05:44:27,723 INFO L226 Difference]: Without dead ends: 3240 [2024-11-09 05:44:27,735 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5181 GetRequests, 4983 SyntacticMatches, 9 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13063 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=7726, Invalid=28564, Unknown=0, NotChecked=0, Total=36290 [2024-11-09 05:44:27,736 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 6161 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 805 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6161 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 805 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:44:27,736 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6161 Valid, 134 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [805 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 05:44:27,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3240 states. [2024-11-09 05:44:28,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3240 to 2535. [2024-11-09 05:44:28,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2535 states, 2534 states have (on average 1.0734017363851618) internal successors, (2720), 2534 states have internal predecessors, (2720), 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 05:44:28,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2535 states to 2535 states and 2720 transitions. [2024-11-09 05:44:28,044 INFO L78 Accepts]: Start accepts. Automaton has 2535 states and 2720 transitions. Word has length 1677 [2024-11-09 05:44:28,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:44:28,045 INFO L471 AbstractCegarLoop]: Abstraction has 2535 states and 2720 transitions. [2024-11-09 05:44:28,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.682926829268293) internal successors, (151), 41 states have internal predecessors, (151), 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 05:44:28,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2535 states and 2720 transitions. [2024-11-09 05:44:28,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2062 [2024-11-09 05:44:28,088 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:44:28,088 INFO L215 NwaCegarLoop]: trace histogram [448, 448, 448, 448, 28, 28, 28, 28, 28, 28, 28, 28, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:44:28,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 05:44:28,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 05:44:28,290 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:44:28,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:44:28,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1485568580, now seen corresponding path program 7 times [2024-11-09 05:44:28,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:44:28,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091799713] [2024-11-09 05:44:28,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:28,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:44:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 428904 backedges. 14780 proven. 256 refuted. 0 times theorem prover too weak. 413868 trivial. 0 not checked. [2024-11-09 05:44:38,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:44:38,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091799713] [2024-11-09 05:44:38,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091799713] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:44:38,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263023433] [2024-11-09 05:44:38,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:44:38,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:44:38,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:44:38,789 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:44:38,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:44:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:42,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 8612 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 05:44:42,184 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:44:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 428904 backedges. 14780 proven. 256 refuted. 0 times theorem prover too weak. 413868 trivial. 0 not checked. [2024-11-09 05:44:42,761 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:44:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 428904 backedges. 14780 proven. 256 refuted. 0 times theorem prover too weak. 413868 trivial. 0 not checked. [2024-11-09 05:44:43,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263023433] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:44:43,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1734422515] [2024-11-09 05:44:43,404 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-09 05:44:43,404 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:44:43,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:44:43,404 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:44:43,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:44:45,160 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:44:46,647 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '54043#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* (* |ULTIMATE.start_main_~n~0#1| 4) (+ (- 1) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (- 4) (* |ULTIMATE.start_main_~n~0#1| 4) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (+ (- 1) |ULTIMATE.start_main_~n~0#1|)))) (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|))) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 05:44:46,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:44:46,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:44:46,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 54 [2024-11-09 05:44:46,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485469269] [2024-11-09 05:44:46,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:44:46,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-09 05:44:46,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:44:46,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-09 05:44:46,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1406, Invalid=3850, Unknown=0, NotChecked=0, Total=5256 [2024-11-09 05:44:46,653 INFO L87 Difference]: Start difference. First operand 2535 states and 2720 transitions. Second operand has 55 states, 55 states have (on average 2.581818181818182) internal successors, (142), 54 states have internal predecessors, (142), 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 05:44:48,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:44:48,682 INFO L93 Difference]: Finished difference Result 7618 states and 9214 transitions. [2024-11-09 05:44:48,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-09 05:44:48,683 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.581818181818182) internal successors, (142), 54 states have internal predecessors, (142), 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 2061 [2024-11-09 05:44:48,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:44:48,708 INFO L225 Difference]: With dead ends: 7618 [2024-11-09 05:44:48,709 INFO L226 Difference]: Without dead ends: 5121 [2024-11-09 05:44:48,715 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6217 GetRequests, 6129 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3596 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2024-11-09 05:44:48,716 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 882 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:44:48,717 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [882 Valid, 174 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 05:44:48,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5121 states. [2024-11-09 05:44:49,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5121 to 5055. [2024-11-09 05:44:49,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5055 states, 5054 states have (on average 1.0617332805698456) internal successors, (5366), 5054 states have internal predecessors, (5366), 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 05:44:49,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5055 states to 5055 states and 5366 transitions. [2024-11-09 05:44:49,510 INFO L78 Accepts]: Start accepts. Automaton has 5055 states and 5366 transitions. Word has length 2061 [2024-11-09 05:44:49,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:44:49,511 INFO L471 AbstractCegarLoop]: Abstraction has 5055 states and 5366 transitions. [2024-11-09 05:44:49,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.581818181818182) internal successors, (142), 54 states have internal predecessors, (142), 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 05:44:49,512 INFO L276 IsEmpty]: Start isEmpty. Operand 5055 states and 5366 transitions. [2024-11-09 05:44:49,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4078 [2024-11-09 05:44:49,665 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:44:49,667 INFO L215 NwaCegarLoop]: trace histogram [952, 952, 952, 952, 28, 28, 28, 28, 28, 28, 28, 28, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:44:49,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 05:44:49,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 05:44:49,868 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:44:49,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:44:49,869 INFO L85 PathProgramCache]: Analyzing trace with hash 2077528684, now seen corresponding path program 8 times [2024-11-09 05:44:49,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:44:49,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896424009] [2024-11-09 05:44:49,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:49,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:44:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:45:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1867320 backedges. 64352 proven. 1156 refuted. 0 times theorem prover too weak. 1801812 trivial. 0 not checked. [2024-11-09 05:45:29,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:45:29,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896424009] [2024-11-09 05:45:29,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896424009] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:45:29,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798127157] [2024-11-09 05:45:29,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:45:29,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:45:29,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:45:29,910 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:45:29,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f2605a-1dcf-44c4-b2ca-6414c48ed75d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process