./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/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_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/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_13983224-789c-4cf8-8e79-8332626c5301/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 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 04:32:33,844 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 04:32:33,905 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 04:32:33,909 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 04:32:33,910 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 04:32:33,932 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 04:32:33,933 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 04:32:33,933 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 04:32:33,934 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 04:32:33,935 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 04:32:33,935 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 04:32:33,935 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 04:32:33,936 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 04:32:33,936 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 04:32:33,937 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 04:32:33,937 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 04:32:33,937 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 04:32:33,938 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 04:32:33,938 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 04:32:33,939 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 04:32:33,939 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 04:32:33,940 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 04:32:33,940 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 04:32:33,941 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 04:32:33,941 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 04:32:33,941 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 04:32:33,942 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 04:32:33,942 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 04:32:33,942 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 04:32:33,942 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 04:32:33,943 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 04:32:33,964 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 04:32:33,965 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 04:32:33,965 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 04:32:33,966 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 04:32:33,966 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 04:32:33,966 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 04:32:33,967 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 04:32:33,971 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:32:33,971 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 04:32:33,972 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 04:32:33,972 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 04:32:33,972 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 04:32:33,973 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 04:32:33,973 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 04:32:33,973 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 04:32:33,973 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 04:32:33,973 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_13983224-789c-4cf8-8e79-8332626c5301/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b [2024-11-09 04:32:34,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:32:34,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:32:34,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:32:34,301 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:32:34,302 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:32:34,303 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c Unable to find full path for "g++" [2024-11-09 04:32:36,362 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:32:36,557 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:32:36,558 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2024-11-09 04:32:36,566 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/data/ca7bbc92d/ff50473a6fd94b3aa34fe8acb0547fff/FLAG60e83bf27 [2024-11-09 04:32:36,582 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/data/ca7bbc92d/ff50473a6fd94b3aa34fe8acb0547fff [2024-11-09 04:32:36,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:32:36,586 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:32:36,588 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:32:36,588 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:32:36,595 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:32:36,596 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:32:36" (1/1) ... [2024-11-09 04:32:36,597 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@726b93e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:32:36, skipping insertion in model container [2024-11-09 04:32:36,597 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:32:36" (1/1) ... [2024-11-09 04:32:36,623 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:32:36,841 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_13983224-789c-4cf8-8e79-8332626c5301/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2024-11-09 04:32:36,873 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:32:36,883 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:32:36,898 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_13983224-789c-4cf8-8e79-8332626c5301/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2024-11-09 04:32:36,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:32:36,939 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:32:36,939 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:32:36 WrapperNode [2024-11-09 04:32:36,939 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:32:36,941 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:32:36,941 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:32:36,941 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:32:36,950 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:32:36" (1/1) ... [2024-11-09 04:32:36,960 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:32:36" (1/1) ... [2024-11-09 04:32:36,986 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 120 [2024-11-09 04:32:36,987 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:32:36,988 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:32:36,988 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:32:36,988 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:32:36,999 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:32:36" (1/1) ... [2024-11-09 04:32:36,999 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:32:36" (1/1) ... [2024-11-09 04:32:37,002 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:32:36" (1/1) ... [2024-11-09 04:32:37,002 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:32:36" (1/1) ... [2024-11-09 04:32:37,009 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:32:36" (1/1) ... [2024-11-09 04:32:37,016 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:32:36" (1/1) ... [2024-11-09 04:32:37,017 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:32:36" (1/1) ... [2024-11-09 04:32:37,019 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:32:36" (1/1) ... [2024-11-09 04:32:37,021 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:32:37,023 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:32:37,023 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:32:37,023 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:32:37,024 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:32:36" (1/1) ... [2024-11-09 04:32:37,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:32:37,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:32:37,056 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:32:37,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:32:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 04:32:37,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 04:32:37,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 04:32:37,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 04:32:37,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:32:37,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:32:37,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 04:32:37,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 04:32:37,166 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:32:37,168 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:32:37,494 INFO L? ?]: Removed 44 outVars from TransFormulas that were not future-live. [2024-11-09 04:32:37,494 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:32:37,595 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:32:37,595 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 04:32:37,596 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:32:37 BoogieIcfgContainer [2024-11-09 04:32:37,596 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:32:37,601 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:32:37,604 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:32:37,613 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:32:37,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:32:36" (1/3) ... [2024-11-09 04:32:37,616 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2816ac61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:32:37, skipping insertion in model container [2024-11-09 04:32:37,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:32:36" (2/3) ... [2024-11-09 04:32:37,617 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2816ac61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:32:37, skipping insertion in model container [2024-11-09 04:32:37,617 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:32:37" (3/3) ... [2024-11-09 04:32:37,618 INFO L112 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.c [2024-11-09 04:32:37,636 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:32:37,637 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 04:32:37,705 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:32:37,713 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;@2e9e79b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:32:37,713 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 04:32:37,718 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.65) internal successors, (66), 41 states have internal predecessors, (66), 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 04:32:37,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 04:32:37,723 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:37,724 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:32:37,724 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:32:37,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:37,730 INFO L85 PathProgramCache]: Analyzing trace with hash 799647599, now seen corresponding path program 1 times [2024-11-09 04:32:37,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:37,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580745064] [2024-11-09 04:32:37,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:37,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:38,312 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 04:32:38,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:38,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580745064] [2024-11-09 04:32:38,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580745064] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:32:38,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:32:38,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:32:38,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687124548] [2024-11-09 04:32:38,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:32:38,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:32:38,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:38,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:32:38,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:32:38,365 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.65) internal successors, (66), 41 states have internal predecessors, (66), 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 04:32:38,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:38,541 INFO L93 Difference]: Finished difference Result 83 states and 131 transitions. [2024-11-09 04:32:38,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:32:38,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 15 [2024-11-09 04:32:38,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:38,555 INFO L225 Difference]: With dead ends: 83 [2024-11-09 04:32:38,556 INFO L226 Difference]: Without dead ends: 48 [2024-11-09 04:32:38,559 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:32:38,564 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:38,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 67 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:32:38,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-09 04:32:38,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2024-11-09 04:32:38,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 41 states have internal predecessors, (64), 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 04:32:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 64 transitions. [2024-11-09 04:32:38,613 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 64 transitions. Word has length 15 [2024-11-09 04:32:38,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:38,614 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 64 transitions. [2024-11-09 04:32:38,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 04:32:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 64 transitions. [2024-11-09 04:32:38,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 04:32:38,616 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:38,616 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:32:38,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 04:32:38,617 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:32:38,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:38,618 INFO L85 PathProgramCache]: Analyzing trace with hash 21576918, now seen corresponding path program 1 times [2024-11-09 04:32:38,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:38,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715376315] [2024-11-09 04:32:38,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:38,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:38,796 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 04:32:38,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:38,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715376315] [2024-11-09 04:32:38,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715376315] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:32:38,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:32:38,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:32:38,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326751240] [2024-11-09 04:32:38,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:32:38,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:32:38,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:38,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:32:38,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:32:38,801 INFO L87 Difference]: Start difference. First operand 42 states and 64 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:32:39,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:39,001 INFO L93 Difference]: Finished difference Result 100 states and 156 transitions. [2024-11-09 04:32:39,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:32:39,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-09 04:32:39,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:39,005 INFO L225 Difference]: With dead ends: 100 [2024-11-09 04:32:39,005 INFO L226 Difference]: Without dead ends: 61 [2024-11-09 04:32:39,006 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 04:32:39,012 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 108 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:39,013 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 36 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:32:39,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-09 04:32:39,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2024-11-09 04:32:39,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.511111111111111) internal successors, (68), 45 states have internal predecessors, (68), 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 04:32:39,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 68 transitions. [2024-11-09 04:32:39,028 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 68 transitions. Word has length 19 [2024-11-09 04:32:39,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:39,028 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 68 transitions. [2024-11-09 04:32:39,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:32:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 68 transitions. [2024-11-09 04:32:39,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-09 04:32:39,032 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:39,032 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 04:32:39,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 04:32:39,033 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:32:39,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:39,034 INFO L85 PathProgramCache]: Analyzing trace with hash -2069581155, now seen corresponding path program 1 times [2024-11-09 04:32:39,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:39,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874231297] [2024-11-09 04:32:39,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:39,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:39,156 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 04:32:39,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:39,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874231297] [2024-11-09 04:32:39,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874231297] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:32:39,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:32:39,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:32:39,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34302168] [2024-11-09 04:32:39,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:32:39,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:32:39,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:39,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:32:39,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:32:39,161 INFO L87 Difference]: Start difference. First operand 46 states and 68 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 04:32:39,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:39,293 INFO L93 Difference]: Finished difference Result 99 states and 149 transitions. [2024-11-09 04:32:39,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:32:39,294 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 04:32:39,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:39,295 INFO L225 Difference]: With dead ends: 99 [2024-11-09 04:32:39,295 INFO L226 Difference]: Without dead ends: 56 [2024-11-09 04:32:39,296 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 04:32:39,297 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 67 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:39,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 43 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:32:39,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-09 04:32:39,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2024-11-09 04:32:39,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.469387755102041) internal successors, (72), 49 states have internal predecessors, (72), 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 04:32:39,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 72 transitions. [2024-11-09 04:32:39,308 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 72 transitions. Word has length 23 [2024-11-09 04:32:39,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:39,309 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 72 transitions. [2024-11-09 04:32:39,309 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 04:32:39,310 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 72 transitions. [2024-11-09 04:32:39,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 04:32:39,310 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:39,311 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] [2024-11-09 04:32:39,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 04:32:39,311 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:32:39,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:39,312 INFO L85 PathProgramCache]: Analyzing trace with hash 48205506, now seen corresponding path program 1 times [2024-11-09 04:32:39,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:39,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455768941] [2024-11-09 04:32:39,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:39,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:39,504 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 04:32:39,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:39,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455768941] [2024-11-09 04:32:39,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455768941] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:32:39,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:32:39,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:32:39,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967724920] [2024-11-09 04:32:39,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:32:39,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:32:39,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:39,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:32:39,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:32:39,510 INFO L87 Difference]: Start difference. First operand 50 states and 72 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 04:32:39,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:39,651 INFO L93 Difference]: Finished difference Result 110 states and 156 transitions. [2024-11-09 04:32:39,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:32:39,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 25 [2024-11-09 04:32:39,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:39,654 INFO L225 Difference]: With dead ends: 110 [2024-11-09 04:32:39,654 INFO L226 Difference]: Without dead ends: 84 [2024-11-09 04:32:39,654 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 04:32:39,655 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 116 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:39,656 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 65 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:32:39,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-09 04:32:39,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 52. [2024-11-09 04:32:39,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 51 states have internal predecessors, (74), 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 04:32:39,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 74 transitions. [2024-11-09 04:32:39,668 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 74 transitions. Word has length 25 [2024-11-09 04:32:39,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:39,669 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 74 transitions. [2024-11-09 04:32:39,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 04:32:39,669 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 74 transitions. [2024-11-09 04:32:39,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 04:32:39,670 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:39,671 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] [2024-11-09 04:32:39,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 04:32:39,671 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:32:39,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:39,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1785794263, now seen corresponding path program 1 times [2024-11-09 04:32:39,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:39,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292803513] [2024-11-09 04:32:39,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:39,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 04:32:39,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:39,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292803513] [2024-11-09 04:32:39,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292803513] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:32:39,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:32:39,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:32:39,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104626285] [2024-11-09 04:32:39,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:32:39,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:32:39,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:39,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:32:39,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:32:39,778 INFO L87 Difference]: Start difference. First operand 52 states and 74 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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 04:32:39,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:39,891 INFO L93 Difference]: Finished difference Result 105 states and 151 transitions. [2024-11-09 04:32:39,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:32:39,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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 29 [2024-11-09 04:32:39,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:39,893 INFO L225 Difference]: With dead ends: 105 [2024-11-09 04:32:39,893 INFO L226 Difference]: Without dead ends: 71 [2024-11-09 04:32:39,893 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 04:32:39,894 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 70 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:39,895 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 63 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:32:39,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-09 04:32:39,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 54. [2024-11-09 04:32:39,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.4339622641509433) internal successors, (76), 53 states have internal predecessors, (76), 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 04:32:39,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 76 transitions. [2024-11-09 04:32:39,915 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 76 transitions. Word has length 29 [2024-11-09 04:32:39,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:39,917 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 76 transitions. [2024-11-09 04:32:39,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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 04:32:39,917 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 76 transitions. [2024-11-09 04:32:39,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 04:32:39,918 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:39,918 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 04:32:39,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 04:32:39,918 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:32:39,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:39,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1395315728, now seen corresponding path program 1 times [2024-11-09 04:32:39,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:39,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541513185] [2024-11-09 04:32:39,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:39,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 04:32:40,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:40,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541513185] [2024-11-09 04:32:40,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541513185] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:32:40,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:32:40,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:32:40,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765631899] [2024-11-09 04:32:40,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:32:40,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:32:40,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:40,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:32:40,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:32:40,058 INFO L87 Difference]: Start difference. First operand 54 states and 76 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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 04:32:40,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:40,133 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2024-11-09 04:32:40,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:32:40,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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 04:32:40,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:40,135 INFO L225 Difference]: With dead ends: 96 [2024-11-09 04:32:40,135 INFO L226 Difference]: Without dead ends: 60 [2024-11-09 04:32:40,136 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 04:32:40,137 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 53 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:40,137 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 72 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:32:40,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-09 04:32:40,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2024-11-09 04:32:40,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 55 states have internal predecessors, (78), 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 04:32:40,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2024-11-09 04:32:40,146 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 33 [2024-11-09 04:32:40,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:40,147 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2024-11-09 04:32:40,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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 04:32:40,147 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2024-11-09 04:32:40,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 04:32:40,148 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:40,148 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, 1, 1] [2024-11-09 04:32:40,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 04:32:40,149 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:32:40,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:40,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1670106891, now seen corresponding path program 1 times [2024-11-09 04:32:40,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:40,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064753758] [2024-11-09 04:32:40,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:40,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 04:32:40,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:40,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064753758] [2024-11-09 04:32:40,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064753758] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:32:40,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:32:40,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:32:40,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781521992] [2024-11-09 04:32:40,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:32:40,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:32:40,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:40,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:32:40,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:32:40,258 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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 04:32:40,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:40,439 INFO L93 Difference]: Finished difference Result 91 states and 127 transitions. [2024-11-09 04:32:40,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:32:40,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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 35 [2024-11-09 04:32:40,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:40,441 INFO L225 Difference]: With dead ends: 91 [2024-11-09 04:32:40,441 INFO L226 Difference]: Without dead ends: 74 [2024-11-09 04:32:40,441 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:32:40,442 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:40,443 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 18 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:32:40,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-09 04:32:40,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 58. [2024-11-09 04:32:40,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 57 states have internal predecessors, (80), 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 04:32:40,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 80 transitions. [2024-11-09 04:32:40,460 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 80 transitions. Word has length 35 [2024-11-09 04:32:40,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:40,461 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 80 transitions. [2024-11-09 04:32:40,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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 04:32:40,462 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 80 transitions. [2024-11-09 04:32:40,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 04:32:40,463 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:40,463 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, 1, 1, 1, 1, 1, 1] [2024-11-09 04:32:40,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 04:32:40,463 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:32:40,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:40,464 INFO L85 PathProgramCache]: Analyzing trace with hash 640979036, now seen corresponding path program 1 times [2024-11-09 04:32:40,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:40,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274780484] [2024-11-09 04:32:40,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:40,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:40,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 04:32:40,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:40,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274780484] [2024-11-09 04:32:40,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274780484] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:32:40,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:32:40,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:32:40,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839384371] [2024-11-09 04:32:40,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:32:40,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:32:40,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:40,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:32:40,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:32:40,600 INFO L87 Difference]: Start difference. First operand 58 states and 80 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:32:40,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:40,735 INFO L93 Difference]: Finished difference Result 88 states and 124 transitions. [2024-11-09 04:32:40,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:32:40,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-09 04:32:40,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:40,737 INFO L225 Difference]: With dead ends: 88 [2024-11-09 04:32:40,737 INFO L226 Difference]: Without dead ends: 63 [2024-11-09 04:32:40,737 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:32:40,738 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:40,738 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 22 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:32:40,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-09 04:32:40,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2024-11-09 04:32:40,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.3898305084745763) internal successors, (82), 59 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 04:32:40,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 82 transitions. [2024-11-09 04:32:40,750 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 82 transitions. Word has length 39 [2024-11-09 04:32:40,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:40,751 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 82 transitions. [2024-11-09 04:32:40,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:32:40,751 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 82 transitions. [2024-11-09 04:32:40,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 04:32:40,752 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:40,752 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:32:40,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 04:32:40,752 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:32:40,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:40,753 INFO L85 PathProgramCache]: Analyzing trace with hash 122470435, now seen corresponding path program 1 times [2024-11-09 04:32:40,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:40,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621430526] [2024-11-09 04:32:40,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:40,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 04:32:40,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:40,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621430526] [2024-11-09 04:32:40,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621430526] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:32:40,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:32:40,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:32:40,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015808747] [2024-11-09 04:32:40,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:32:40,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:32:40,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:40,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:32:40,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:32:40,827 INFO L87 Difference]: Start difference. First operand 60 states and 82 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 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 04:32:40,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:40,942 INFO L93 Difference]: Finished difference Result 89 states and 123 transitions. [2024-11-09 04:32:40,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:32:40,943 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 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 43 [2024-11-09 04:32:40,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:40,943 INFO L225 Difference]: With dead ends: 89 [2024-11-09 04:32:40,944 INFO L226 Difference]: Without dead ends: 62 [2024-11-09 04:32:40,944 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:32:40,945 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:40,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 27 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:32:40,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-09 04:32:40,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-11-09 04:32:40,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 61 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 04:32:40,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 84 transitions. [2024-11-09 04:32:40,957 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 84 transitions. Word has length 43 [2024-11-09 04:32:40,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:40,957 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 84 transitions. [2024-11-09 04:32:40,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 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 04:32:40,958 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 84 transitions. [2024-11-09 04:32:40,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 04:32:40,958 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:40,958 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:32:40,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 04:32:40,959 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:32:40,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:40,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1647010296, now seen corresponding path program 1 times [2024-11-09 04:32:40,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:40,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033695167] [2024-11-09 04:32:40,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:40,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 04:32:41,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:41,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033695167] [2024-11-09 04:32:41,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033695167] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:32:41,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214581713] [2024-11-09 04:32:41,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:41,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:32:41,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:32:41,052 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:32:41,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 04:32:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:41,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 04:32:41,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:32:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 04:32:41,273 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:32:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 04:32:41,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214581713] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:32:41,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1515263402] [2024-11-09 04:32:41,340 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 04:32:41,340 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:32:41,344 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:32:41,350 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:32:41,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:32:52,634 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:32:53,697 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2157#(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_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|))) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 04:32:53,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:32:53,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:32:53,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-09 04:32:53,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733688141] [2024-11-09 04:32:53,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:32:53,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 04:32:53,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:53,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 04:32:53,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 04:32:53,700 INFO L87 Difference]: Start difference. First operand 62 states and 84 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 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 04:32:53,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:53,917 INFO L93 Difference]: Finished difference Result 149 states and 209 transitions. [2024-11-09 04:32:53,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:32:53,917 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 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 04:32:53,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:53,918 INFO L225 Difference]: With dead ends: 149 [2024-11-09 04:32:53,918 INFO L226 Difference]: Without dead ends: 90 [2024-11-09 04:32:53,919 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 04:32:53,920 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 213 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:53,921 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 85 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:32:53,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-09 04:32:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2024-11-09 04:32:53,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.3026315789473684) internal successors, (99), 76 states have internal predecessors, (99), 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 04:32:53,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 99 transitions. [2024-11-09 04:32:53,936 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 99 transitions. Word has length 45 [2024-11-09 04:32:53,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:53,936 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 99 transitions. [2024-11-09 04:32:53,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 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 04:32:53,937 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 99 transitions. [2024-11-09 04:32:53,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 04:32:53,941 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:53,942 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:32:53,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 04:32:54,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 04:32:54,147 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:32:54,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:54,148 INFO L85 PathProgramCache]: Analyzing trace with hash -140057225, now seen corresponding path program 2 times [2024-11-09 04:32:54,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:54,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142343049] [2024-11-09 04:32:54,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:54,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 04:32:54,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:54,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142343049] [2024-11-09 04:32:54,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142343049] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:32:54,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866745787] [2024-11-09 04:32:54,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:32:54,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:32:54,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:32:54,314 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:32:54,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 04:32:54,396 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 04:32:54,396 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:32:54,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 04:32:54,399 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:32:54,495 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 04:32:54,495 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:32:54,550 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 04:32:54,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866745787] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:32:54,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1447309055] [2024-11-09 04:32:54,554 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 04:32:54,554 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:32:54,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:32:54,555 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:32:54,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:33:02,550 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:33:03,682 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2805#(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_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|))) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 04:33:03,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:33:03,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:33:03,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 3] total 11 [2024-11-09 04:33:03,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921718018] [2024-11-09 04:33:03,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:33:03,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 04:33:03,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:03,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 04:33:03,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 04:33:03,685 INFO L87 Difference]: Start difference. First operand 77 states and 99 transitions. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 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 04:33:04,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:04,809 INFO L93 Difference]: Finished difference Result 449 states and 583 transitions. [2024-11-09 04:33:04,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-09 04:33:04,810 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 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 51 [2024-11-09 04:33:04,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:04,812 INFO L225 Difference]: With dead ends: 449 [2024-11-09 04:33:04,812 INFO L226 Difference]: Without dead ends: 375 [2024-11-09 04:33:04,817 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=657, Invalid=3003, Unknown=0, NotChecked=0, Total=3660 [2024-11-09 04:33:04,818 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 1196 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:04,820 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1196 Valid, 86 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:33:04,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-11-09 04:33:04,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 138. [2024-11-09 04:33:04,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.2262773722627738) internal successors, (168), 137 states have internal predecessors, (168), 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 04:33:04,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 168 transitions. [2024-11-09 04:33:04,851 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 168 transitions. Word has length 51 [2024-11-09 04:33:04,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:04,851 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 168 transitions. [2024-11-09 04:33:04,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 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 04:33:04,852 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 168 transitions. [2024-11-09 04:33:04,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-09 04:33:04,853 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:04,854 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2024-11-09 04:33:04,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 04:33:05,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 04:33:05,058 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:33:05,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:05,058 INFO L85 PathProgramCache]: Analyzing trace with hash -148717743, now seen corresponding path program 3 times [2024-11-09 04:33:05,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:05,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569151981] [2024-11-09 04:33:05,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:05,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 200 proven. 25 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2024-11-09 04:33:05,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:05,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569151981] [2024-11-09 04:33:05,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569151981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:05,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244542863] [2024-11-09 04:33:05,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:33:05,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:05,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:33:05,461 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:33:05,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 04:33:05,584 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:33:05,584 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:33:05,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 04:33:05,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 8 proven. 203 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2024-11-09 04:33:05,850 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:33:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 8 proven. 203 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2024-11-09 04:33:06,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244542863] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:33:06,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1361066137] [2024-11-09 04:33:06,047 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 04:33:06,047 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:33:06,048 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:33:06,048 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:33:06,048 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:33:12,494 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:33:13,726 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4332#(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_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|))) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 04:33:13,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:33:13,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:33:13,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-09 04:33:13,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27843490] [2024-11-09 04:33:13,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:33:13,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 04:33:13,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:13,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 04:33:13,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1499, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 04:33:13,730 INFO L87 Difference]: Start difference. First operand 138 states and 168 transitions. Second operand has 18 states, 18 states have (on average 6.055555555555555) internal successors, (109), 18 states have internal predecessors, (109), 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 04:33:14,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:14,618 INFO L93 Difference]: Finished difference Result 560 states and 687 transitions. [2024-11-09 04:33:14,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 04:33:14,619 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.055555555555555) internal successors, (109), 18 states have internal predecessors, (109), 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 107 [2024-11-09 04:33:14,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:14,621 INFO L225 Difference]: With dead ends: 560 [2024-11-09 04:33:14,621 INFO L226 Difference]: Without dead ends: 427 [2024-11-09 04:33:14,624 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 278 SyntacticMatches, 9 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=514, Invalid=3146, Unknown=0, NotChecked=0, Total=3660 [2024-11-09 04:33:14,625 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 734 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:14,625 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 102 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:33:14,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2024-11-09 04:33:14,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 242. [2024-11-09 04:33:14,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.1784232365145229) internal successors, (284), 241 states have internal predecessors, (284), 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 04:33:14,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 284 transitions. [2024-11-09 04:33:14,660 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 284 transitions. Word has length 107 [2024-11-09 04:33:14,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:14,661 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 284 transitions. [2024-11-09 04:33:14,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.055555555555555) internal successors, (109), 18 states have internal predecessors, (109), 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 04:33:14,661 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 284 transitions. [2024-11-09 04:33:14,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2024-11-09 04:33:14,663 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:14,663 INFO L215 NwaCegarLoop]: trace histogram [48, 48, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1] [2024-11-09 04:33:14,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 04:33:14,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:14,866 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:33:14,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:14,866 INFO L85 PathProgramCache]: Analyzing trace with hash 236168697, now seen corresponding path program 4 times [2024-11-09 04:33:14,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:14,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465210674] [2024-11-09 04:33:14,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:14,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2818 backedges. 620 proven. 36 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2024-11-09 04:33:15,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:15,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465210674] [2024-11-09 04:33:15,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465210674] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:15,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250896519] [2024-11-09 04:33:15,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:33:15,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:15,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:33:15,440 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:33:15,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 04:33:15,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:15,678 INFO L255 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 04:33:15,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2818 backedges. 620 proven. 36 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2024-11-09 04:33:15,808 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:33:15,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2818 backedges. 620 proven. 36 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2024-11-09 04:33:15,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250896519] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:33:15,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1443192455] [2024-11-09 04:33:15,947 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 04:33:15,947 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:33:15,948 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:33:15,948 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:33:15,948 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:33:22,711 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:33:23,807 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6606#(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_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|))) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 04:33:23,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:33:23,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:33:23,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-09 04:33:23,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338293277] [2024-11-09 04:33:23,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:33:23,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 04:33:23,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:23,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 04:33:23,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1844, Unknown=0, NotChecked=0, Total=2256 [2024-11-09 04:33:23,811 INFO L87 Difference]: Start difference. First operand 242 states and 284 transitions. Second operand has 25 states, 25 states have (on average 3.76) internal successors, (94), 24 states have internal predecessors, (94), 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 04:33:24,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:24,355 INFO L93 Difference]: Finished difference Result 710 states and 902 transitions. [2024-11-09 04:33:24,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 04:33:24,356 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 24 states have internal predecessors, (94), 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 179 [2024-11-09 04:33:24,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:24,358 INFO L225 Difference]: With dead ends: 710 [2024-11-09 04:33:24,358 INFO L226 Difference]: Without dead ends: 486 [2024-11-09 04:33:24,360 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 488 SyntacticMatches, 10 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=545, Invalid=2425, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 04:33:24,361 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 355 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:24,361 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 160 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:33:24,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2024-11-09 04:33:24,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 434. [2024-11-09 04:33:24,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 1.136258660508083) internal successors, (492), 433 states have internal predecessors, (492), 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 04:33:24,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 492 transitions. [2024-11-09 04:33:24,416 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 492 transitions. Word has length 179 [2024-11-09 04:33:24,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:24,416 INFO L471 AbstractCegarLoop]: Abstraction has 434 states and 492 transitions. [2024-11-09 04:33:24,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 24 states have internal predecessors, (94), 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 04:33:24,417 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 492 transitions. [2024-11-09 04:33:24,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2024-11-09 04:33:24,420 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:24,421 INFO L215 NwaCegarLoop]: trace histogram [112, 112, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1] [2024-11-09 04:33:24,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 04:33:24,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:24,622 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:33:24,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:24,622 INFO L85 PathProgramCache]: Analyzing trace with hash 194242361, now seen corresponding path program 5 times [2024-11-09 04:33:24,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:24,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213390156] [2024-11-09 04:33:24,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:24,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13506 backedges. 2972 proven. 196 refuted. 0 times theorem prover too weak. 10338 trivial. 0 not checked. [2024-11-09 04:33:26,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:26,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213390156] [2024-11-09 04:33:26,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213390156] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:26,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439481582] [2024-11-09 04:33:26,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:33:26,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:26,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:33:26,283 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:33:26,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 04:33:26,534 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 04:33:26,535 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:33:26,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:33:26,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 13506 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13505 trivial. 0 not checked. [2024-11-09 04:33:27,747 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:33:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13506 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13505 trivial. 0 not checked. [2024-11-09 04:33:28,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439481582] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:33:28,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1486875223] [2024-11-09 04:33:28,235 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 04:33:28,235 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:33:28,235 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:33:28,235 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:33:28,236 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:33:34,340 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:33:35,887 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10120#(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_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|))) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 04:33:35,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:33:35,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:33:35,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 4, 4] total 23 [2024-11-09 04:33:35,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272733965] [2024-11-09 04:33:35,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:33:35,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 04:33:35,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:35,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 04:33:35,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=1826, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 04:33:35,890 INFO L87 Difference]: Start difference. First operand 434 states and 492 transitions. Second operand has 24 states, 24 states have (on average 6.25) internal successors, (150), 23 states have internal predecessors, (150), 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 04:33:38,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:38,956 INFO L93 Difference]: Finished difference Result 1477 states and 1697 transitions. [2024-11-09 04:33:38,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-09 04:33:38,957 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.25) internal successors, (150), 23 states have internal predecessors, (150), 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 307 [2024-11-09 04:33:38,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:38,962 INFO L225 Difference]: With dead ends: 1477 [2024-11-09 04:33:38,962 INFO L226 Difference]: Without dead ends: 1077 [2024-11-09 04:33:38,967 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1000 GetRequests, 881 SyntacticMatches, 10 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4191 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2657, Invalid=9553, Unknown=0, NotChecked=0, Total=12210 [2024-11-09 04:33:38,968 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 1964 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1964 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:38,968 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1964 Valid, 90 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 04:33:38,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2024-11-09 04:33:39,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 491. [2024-11-09 04:33:39,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.1428571428571428) internal successors, (560), 490 states have internal predecessors, (560), 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 04:33:39,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 560 transitions. [2024-11-09 04:33:39,041 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 560 transitions. Word has length 307 [2024-11-09 04:33:39,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:39,042 INFO L471 AbstractCegarLoop]: Abstraction has 491 states and 560 transitions. [2024-11-09 04:33:39,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.25) internal successors, (150), 23 states have internal predecessors, (150), 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 04:33:39,042 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 560 transitions. [2024-11-09 04:33:39,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2024-11-09 04:33:39,049 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:39,049 INFO L215 NwaCegarLoop]: trace histogram [120, 120, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:33:39,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 04:33:39,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 04:33:39,254 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:33:39,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:39,254 INFO L85 PathProgramCache]: Analyzing trace with hash -44915110, now seen corresponding path program 6 times [2024-11-09 04:33:39,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:39,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482283146] [2024-11-09 04:33:39,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:39,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 15511 backedges. 3392 proven. 225 refuted. 0 times theorem prover too weak. 11894 trivial. 0 not checked. [2024-11-09 04:33:40,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:40,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482283146] [2024-11-09 04:33:40,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482283146] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:40,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918100143] [2024-11-09 04:33:40,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:33:40,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:40,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:33:40,939 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:33:40,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 04:33:41,293 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:33:41,294 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:33:41,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 04:33:41,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:41,883 INFO L134 CoverageAnalysis]: Checked inductivity of 15511 backedges. 53 proven. 6310 refuted. 0 times theorem prover too weak. 9148 trivial. 0 not checked. [2024-11-09 04:33:41,883 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:33:42,421 INFO L134 CoverageAnalysis]: Checked inductivity of 15511 backedges. 53 proven. 6310 refuted. 0 times theorem prover too weak. 9148 trivial. 0 not checked. [2024-11-09 04:33:42,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918100143] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:33:42,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [77513870] [2024-11-09 04:33:42,424 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 04:33:42,424 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:33:42,425 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:33:42,425 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:33:42,425 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:33:47,917 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:33:49,617 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15087#(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_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|))) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 04:33:49,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:33:49,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:33:49,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 31 [2024-11-09 04:33:49,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017178270] [2024-11-09 04:33:49,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:33:49,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 04:33:49,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:49,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 04:33:49,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=2488, Unknown=0, NotChecked=0, Total=2862 [2024-11-09 04:33:49,621 INFO L87 Difference]: Start difference. First operand 491 states and 560 transitions. Second operand has 31 states, 31 states have (on average 5.0) internal successors, (155), 31 states have internal predecessors, (155), 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 04:33:52,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:52,825 INFO L93 Difference]: Finished difference Result 1685 states and 1963 transitions. [2024-11-09 04:33:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-09 04:33:52,826 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.0) internal successors, (155), 31 states have internal predecessors, (155), 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 353 [2024-11-09 04:33:52,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:52,832 INFO L225 Difference]: With dead ends: 1685 [2024-11-09 04:33:52,832 INFO L226 Difference]: Without dead ends: 1230 [2024-11-09 04:33:52,838 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1141 GetRequests, 1009 SyntacticMatches, 14 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4991 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2708, Invalid=11572, Unknown=0, NotChecked=0, Total=14280 [2024-11-09 04:33:52,839 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 3034 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3034 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:52,839 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3034 Valid, 163 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 04:33:52,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2024-11-09 04:33:52,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 727. [2024-11-09 04:33:52,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 1.128099173553719) internal successors, (819), 726 states have internal predecessors, (819), 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 04:33:52,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 819 transitions. [2024-11-09 04:33:52,967 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 819 transitions. Word has length 353 [2024-11-09 04:33:52,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:52,968 INFO L471 AbstractCegarLoop]: Abstraction has 727 states and 819 transitions. [2024-11-09 04:33:52,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.0) internal successors, (155), 31 states have internal predecessors, (155), 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 04:33:52,968 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 819 transitions. [2024-11-09 04:33:52,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2024-11-09 04:33:52,980 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:52,981 INFO L215 NwaCegarLoop]: trace histogram [192, 192, 12, 12, 12, 12, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:33:53,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 04:33:53,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 04:33:53,182 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:33:53,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:53,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1657247010, now seen corresponding path program 7 times [2024-11-09 04:33:53,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:53,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605879983] [2024-11-09 04:33:53,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:53,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 39415 backedges. 6028 proven. 256 refuted. 0 times theorem prover too weak. 33131 trivial. 0 not checked. [2024-11-09 04:33:55,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:55,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605879983] [2024-11-09 04:33:55,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605879983] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:55,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260476555] [2024-11-09 04:33:55,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:33:55,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:55,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:33:55,308 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:33:55,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 04:33:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:55,968 INFO L255 TraceCheckSpWp]: Trace formula consists of 2242 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 04:33:55,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 39415 backedges. 6028 proven. 256 refuted. 0 times theorem prover too weak. 33131 trivial. 0 not checked. [2024-11-09 04:33:56,304 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:33:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 39415 backedges. 6028 proven. 256 refuted. 0 times theorem prover too weak. 33131 trivial. 0 not checked. [2024-11-09 04:33:56,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260476555] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:33:56,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [185346120] [2024-11-09 04:33:56,850 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 04:33:56,851 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:33:56,851 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:33:56,851 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:33:56,851 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:33:58,764 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:34:03,004 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21740#(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_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|))) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 04:34:03,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:34:03,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:34:03,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 54 [2024-11-09 04:34:03,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460058800] [2024-11-09 04:34:03,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:34:03,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-09 04:34:03,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:34:03,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-09 04:34:03,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1415, Invalid=4135, Unknown=0, NotChecked=0, Total=5550 [2024-11-09 04:34:03,009 INFO L87 Difference]: Start difference. First operand 727 states and 819 transitions. Second operand has 55 states, 55 states have (on average 2.8) internal successors, (154), 54 states have internal predecessors, (154), 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 04:34:04,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:34:04,581 INFO L93 Difference]: Finished difference Result 2196 states and 2736 transitions. [2024-11-09 04:34:04,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-09 04:34:04,582 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.8) internal successors, (154), 54 states have internal predecessors, (154), 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 513 [2024-11-09 04:34:04,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:34:04,589 INFO L225 Difference]: With dead ends: 2196 [2024-11-09 04:34:04,589 INFO L226 Difference]: Without dead ends: 1507 [2024-11-09 04:34:04,592 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1573 GetRequests, 1290 SyntacticMatches, 193 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20732 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2078, Invalid=6294, Unknown=0, NotChecked=0, Total=8372 [2024-11-09 04:34:04,593 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 948 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 04:34:04,593 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [948 Valid, 253 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 04:34:04,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2024-11-09 04:34:04,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1375. [2024-11-09 04:34:04,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1374 states have (on average 1.1069868995633187) internal successors, (1521), 1374 states have internal predecessors, (1521), 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 04:34:04,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 1521 transitions. [2024-11-09 04:34:04,786 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 1521 transitions. Word has length 513 [2024-11-09 04:34:04,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:34:04,787 INFO L471 AbstractCegarLoop]: Abstraction has 1375 states and 1521 transitions. [2024-11-09 04:34:04,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.8) internal successors, (154), 54 states have internal predecessors, (154), 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 04:34:04,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 1521 transitions. [2024-11-09 04:34:04,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 946 [2024-11-09 04:34:04,797 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:34:04,798 INFO L215 NwaCegarLoop]: trace histogram [408, 408, 12, 12, 12, 12, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:34:04,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 04:34:04,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 04:34:04,999 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:34:04,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:34:04,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1234476778, now seen corresponding path program 8 times [2024-11-09 04:34:04,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:34:04,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016201951] [2024-11-09 04:34:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:34:05,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:34:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:34:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 171391 backedges. 26224 proven. 1156 refuted. 0 times theorem prover too weak. 144011 trivial. 0 not checked. [2024-11-09 04:34:10,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:34:10,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016201951] [2024-11-09 04:34:10,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016201951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:34:10,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330262281] [2024-11-09 04:34:10,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:34:10,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:34:10,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:34:10,822 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:34:10,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 04:34:11,518 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 04:34:11,518 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:34:11,521 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 04:34:11,535 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:34:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 171391 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 171390 trivial. 0 not checked. [2024-11-09 04:34:13,067 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:34:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 171391 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 171390 trivial. 0 not checked. [2024-11-09 04:34:14,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330262281] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:34:14,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [897473977] [2024-11-09 04:34:14,579 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 04:34:14,579 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:34:14,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:34:14,580 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:34:14,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:34:21,011 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:34:23,121 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32551#(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_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|))) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 04:34:23,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:34:23,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:34:23,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 4, 4] total 43 [2024-11-09 04:34:23,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66327167] [2024-11-09 04:34:23,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:34:23,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-09 04:34:23,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:34:23,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-09 04:34:23,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=3525, Unknown=0, NotChecked=0, Total=4422 [2024-11-09 04:34:23,125 INFO L87 Difference]: Start difference. First operand 1375 states and 1521 transitions. Second operand has 44 states, 44 states have (on average 3.772727272727273) internal successors, (166), 43 states have internal predecessors, (166), 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 04:34:37,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:34:37,056 INFO L93 Difference]: Finished difference Result 5411 states and 6305 transitions. [2024-11-09 04:34:37,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2024-11-09 04:34:37,057 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.772727272727273) internal successors, (166), 43 states have internal predecessors, (166), 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 945 [2024-11-09 04:34:37,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:34:37,074 INFO L225 Difference]: With dead ends: 5411 [2024-11-09 04:34:37,074 INFO L226 Difference]: Without dead ends: 4110 [2024-11-09 04:34:37,084 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3050 GetRequests, 2790 SyntacticMatches, 15 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20413 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=15731, Invalid=45031, Unknown=0, NotChecked=0, Total=60762 [2024-11-09 04:34:37,085 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 7891 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 902 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7891 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 902 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:34:37,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7891 Valid, 176 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [902 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-09 04:34:37,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4110 states. [2024-11-09 04:34:37,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4110 to 1446. [2024-11-09 04:34:37,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 1.1114186851211072) internal successors, (1606), 1445 states have internal predecessors, (1606), 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 04:34:37,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 1606 transitions. [2024-11-09 04:34:37,354 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 1606 transitions. Word has length 945 [2024-11-09 04:34:37,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:34:37,354 INFO L471 AbstractCegarLoop]: Abstraction has 1446 states and 1606 transitions. [2024-11-09 04:34:37,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.772727272727273) internal successors, (166), 43 states have internal predecessors, (166), 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 04:34:37,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 1606 transitions. [2024-11-09 04:34:37,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1000 [2024-11-09 04:34:37,365 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:34:37,365 INFO L215 NwaCegarLoop]: trace histogram [420, 420, 12, 12, 12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1] [2024-11-09 04:34:37,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 04:34:37,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 04:34:37,566 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:34:37,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:34:37,567 INFO L85 PathProgramCache]: Analyzing trace with hash -27184213, now seen corresponding path program 9 times [2024-11-09 04:34:37,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:34:37,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115209129] [2024-11-09 04:34:37,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:34:37,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:34:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:34:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 181552 backedges. 27764 proven. 1225 refuted. 0 times theorem prover too weak. 152563 trivial. 0 not checked. [2024-11-09 04:34:43,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:34:43,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115209129] [2024-11-09 04:34:43,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115209129] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:34:43,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161636794] [2024-11-09 04:34:43,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:34:43,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:34:43,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:34:43,213 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:34:43,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 04:34:44,158 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:34:44,158 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:34:44,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 04:34:44,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:34:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 181552 backedges. 47 proven. 1 refuted. 0 times theorem prover too weak. 181504 trivial. 0 not checked. [2024-11-09 04:34:44,404 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:34:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 181552 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 181504 trivial. 0 not checked. [2024-11-09 04:34:44,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161636794] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:34:44,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1973198251] [2024-11-09 04:34:44,580 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 04:34:44,580 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:34:44,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:34:44,581 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:34:44,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:34:51,599 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:34:54,223 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48284#(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_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|))) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 04:34:54,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:34:54,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:34:54,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 7, 7] total 48 [2024-11-09 04:34:54,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672800154] [2024-11-09 04:34:54,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:34:54,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-09 04:34:54,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:34:54,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-09 04:34:54,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=940, Invalid=4172, Unknown=0, NotChecked=0, Total=5112 [2024-11-09 04:34:54,228 INFO L87 Difference]: Start difference. First operand 1446 states and 1606 transitions. Second operand has 48 states, 48 states have (on average 3.1666666666666665) internal successors, (152), 48 states have internal predecessors, (152), 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 04:34:57,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:34:57,646 INFO L93 Difference]: Finished difference Result 3378 states and 4024 transitions. [2024-11-09 04:34:57,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-09 04:34:57,646 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.1666666666666665) internal successors, (152), 48 states have internal predecessors, (152), 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 999 [2024-11-09 04:34:57,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:34:57,655 INFO L225 Difference]: With dead ends: 3378 [2024-11-09 04:34:57,656 INFO L226 Difference]: Without dead ends: 1942 [2024-11-09 04:34:57,659 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3123 GetRequests, 2985 SyntacticMatches, 15 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4777 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3185, Invalid=12315, Unknown=0, NotChecked=0, Total=15500 [2024-11-09 04:34:57,660 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 1583 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1583 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:34:57,661 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1583 Valid, 212 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 04:34:57,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2024-11-09 04:34:57,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1499. [2024-11-09 04:34:57,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 1.1134846461949266) internal successors, (1668), 1498 states have internal predecessors, (1668), 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 04:34:57,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 1668 transitions. [2024-11-09 04:34:57,907 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 1668 transitions. Word has length 999 [2024-11-09 04:34:57,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:34:57,908 INFO L471 AbstractCegarLoop]: Abstraction has 1499 states and 1668 transitions. [2024-11-09 04:34:57,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.1666666666666665) internal successors, (152), 48 states have internal predecessors, (152), 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 04:34:57,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 1668 transitions. [2024-11-09 04:34:57,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1030 [2024-11-09 04:34:57,919 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:34:57,920 INFO L215 NwaCegarLoop]: trace histogram [432, 432, 12, 12, 12, 12, 7, 7, 4, 4, 4, 4, 4, 4, 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, 1, 1] [2024-11-09 04:34:57,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 04:34:58,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 04:34:58,125 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:34:58,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:34:58,125 INFO L85 PathProgramCache]: Analyzing trace with hash -820963082, now seen corresponding path program 10 times [2024-11-09 04:34:58,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:34:58,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799325988] [2024-11-09 04:34:58,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:34:58,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:34:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 191950 backedges. 29348 proven. 1296 refuted. 0 times theorem prover too weak. 161306 trivial. 0 not checked. [2024-11-09 04:35:03,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:35:03,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799325988] [2024-11-09 04:35:03,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799325988] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:35:03,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169960269] [2024-11-09 04:35:03,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:35:03,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:03,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:35:03,702 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:35:03,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 04:35:05,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:05,217 INFO L255 TraceCheckSpWp]: Trace formula consists of 4738 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-09 04:35:05,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:35:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 191950 backedges. 29348 proven. 1296 refuted. 0 times theorem prover too weak. 161306 trivial. 0 not checked. [2024-11-09 04:35:06,354 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:35:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 191950 backedges. 29348 proven. 1296 refuted. 0 times theorem prover too weak. 161306 trivial. 0 not checked. [2024-11-09 04:35:08,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169960269] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:35:08,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [410578091] [2024-11-09 04:35:08,844 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 04:35:08,844 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:35:08,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:35:08,845 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:35:08,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:35:10,793 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:35:26,141 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '61638#(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_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|))) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 04:35:26,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:35:26,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:35:26,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 114 [2024-11-09 04:35:26,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898401705] [2024-11-09 04:35:26,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:35:26,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2024-11-09 04:35:26,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:35:26,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2024-11-09 04:35:26,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5895, Invalid=12195, Unknown=0, NotChecked=0, Total=18090 [2024-11-09 04:35:26,152 INFO L87 Difference]: Start difference. First operand 1499 states and 1668 transitions. Second operand has 115 states, 115 states have (on average 2.382608695652174) internal successors, (274), 114 states have internal predecessors, (274), 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 04:35:33,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:35:33,682 INFO L93 Difference]: Finished difference Result 5156 states and 6826 transitions. [2024-11-09 04:35:33,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-11-09 04:35:33,683 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.382608695652174) internal successors, (274), 114 states have internal predecessors, (274), 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 1029 [2024-11-09 04:35:33,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:35:33,697 INFO L225 Difference]: With dead ends: 5156 [2024-11-09 04:35:33,698 INFO L226 Difference]: Without dead ends: 3735 [2024-11-09 04:35:33,702 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3161 GetRequests, 2558 SyntacticMatches, 433 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93832 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=8818, Invalid=20594, Unknown=0, NotChecked=0, Total=29412 [2024-11-09 04:35:33,704 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 3258 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 754 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3258 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:35:33,706 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3258 Valid, 432 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 04:35:33,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3735 states. [2024-11-09 04:35:34,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3735 to 2867. [2024-11-09 04:35:34,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2867 states, 2866 states have (on average 1.0990928122819261) internal successors, (3150), 2866 states have internal predecessors, (3150), 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 04:35:34,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2867 states to 2867 states and 3150 transitions. [2024-11-09 04:35:34,315 INFO L78 Accepts]: Start accepts. Automaton has 2867 states and 3150 transitions. Word has length 1029 [2024-11-09 04:35:34,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:35:34,316 INFO L471 AbstractCegarLoop]: Abstraction has 2867 states and 3150 transitions. [2024-11-09 04:35:34,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.382608695652174) internal successors, (274), 114 states have internal predecessors, (274), 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 04:35:34,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2867 states and 3150 transitions. [2024-11-09 04:35:34,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1942 [2024-11-09 04:35:34,346 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:35:34,346 INFO L215 NwaCegarLoop]: trace histogram [888, 888, 12, 12, 12, 12, 7, 7, 4, 4, 4, 4, 4, 4, 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, 1, 1] [2024-11-09 04:35:34,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 04:35:34,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:34,547 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:35:34,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:35:34,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1231617058, now seen corresponding path program 11 times [2024-11-09 04:35:34,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:35:34,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980956370] [2024-11-09 04:35:34,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:34,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:35:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 798886 backedges. 122144 proven. 5476 refuted. 0 times theorem prover too weak. 671266 trivial. 0 not checked. [2024-11-09 04:35:58,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:35:58,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980956370] [2024-11-09 04:35:58,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980956370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:35:58,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267786156] [2024-11-09 04:35:58,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:35:58,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:58,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:35:58,875 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:35:58,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 04:36:00,473 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 04:36:00,473 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:36:00,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:36:00,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:36:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 798886 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 798845 trivial. 0 not checked. [2024-11-09 04:36:08,471 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:36:12,983 INFO L134 CoverageAnalysis]: Checked inductivity of 798886 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 798845 trivial. 0 not checked. [2024-11-09 04:36:12,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267786156] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:36:12,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [337636536] [2024-11-09 04:36:12,986 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 04:36:12,986 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:36:12,987 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:36:12,987 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:36:12,987 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:36:19,608 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:36:23,463 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '84834#(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_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|))) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 04:36:23,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:36:23,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:36:23,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 4, 4] total 83 [2024-11-09 04:36:23,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912887266] [2024-11-09 04:36:23,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:36:23,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-11-09 04:36:23,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:36:23,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-11-09 04:36:23,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3186, Invalid=8156, Unknown=0, NotChecked=0, Total=11342 [2024-11-09 04:36:23,469 INFO L87 Difference]: Start difference. First operand 2867 states and 3150 transitions. Second operand has 84 states, 84 states have (on average 3.380952380952381) internal successors, (284), 83 states have internal predecessors, (284), 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 04:37:07,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:07,661 INFO L93 Difference]: Finished difference Result 7965 states and 9103 transitions. [2024-11-09 04:37:07,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 307 states. [2024-11-09 04:37:07,662 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.380952380952381) internal successors, (284), 83 states have internal predecessors, (284), 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 1941 [2024-11-09 04:37:07,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:07,677 INFO L225 Difference]: With dead ends: 7965 [2024-11-09 04:37:07,677 INFO L226 Difference]: Without dead ends: 5252 [2024-11-09 04:37:07,693 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6202 GetRequests, 5779 SyntacticMatches, 14 SemanticMatches, 409 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54875 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=46125, Invalid=122385, Unknown=0, NotChecked=0, Total=168510 [2024-11-09 04:37:07,693 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 14255 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 1491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14255 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1491 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:07,694 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14255 Valid, 285 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1491 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-09 04:37:07,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5252 states. [2024-11-09 04:37:08,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5252 to 3886. [2024-11-09 04:37:08,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3886 states, 3885 states have (on average 1.0952380952380953) internal successors, (4255), 3885 states have internal predecessors, (4255), 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 04:37:08,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3886 states to 3886 states and 4255 transitions. [2024-11-09 04:37:08,397 INFO L78 Accepts]: Start accepts. Automaton has 3886 states and 4255 transitions. Word has length 1941 [2024-11-09 04:37:08,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:08,398 INFO L471 AbstractCegarLoop]: Abstraction has 3886 states and 4255 transitions. [2024-11-09 04:37:08,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.380952380952381) internal successors, (284), 83 states have internal predecessors, (284), 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 04:37:08,398 INFO L276 IsEmpty]: Start isEmpty. Operand 3886 states and 4255 transitions. [2024-11-09 04:37:08,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2654 [2024-11-09 04:37:08,458 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:08,459 INFO L215 NwaCegarLoop]: trace histogram [1200, 1200, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 7, 7, 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, 1, 1] [2024-11-09 04:37:08,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 04:37:08,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:08,661 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:37:08,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:08,662 INFO L85 PathProgramCache]: Analyzing trace with hash -2033333854, now seen corresponding path program 12 times [2024-11-09 04:37:08,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:37:08,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757733571] [2024-11-09 04:37:08,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:08,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:37:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1459778 backedges. 171056 proven. 5625 refuted. 0 times theorem prover too weak. 1283097 trivial. 0 not checked. [2024-11-09 04:37:45,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:37:45,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757733571] [2024-11-09 04:37:45,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757733571] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:37:45,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39507736] [2024-11-09 04:37:45,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:37:45,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:45,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:37:45,811 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:37:45,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 04:37:48,379 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:37:48,379 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:37:48,390 INFO L255 TraceCheckSpWp]: Trace formula consists of 1778 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 04:37:48,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1459778 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 1459714 trivial. 0 not checked. [2024-11-09 04:37:48,755 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1459778 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 1459714 trivial. 0 not checked. [2024-11-09 04:37:49,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39507736] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:37:49,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1434719235] [2024-11-09 04:37:49,029 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 04:37:49,029 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:37:49,030 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:37:49,030 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:37:49,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:37:56,180 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:38:00,418 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '118080#(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_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|))) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 04:38:00,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:38:00,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:38:00,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 7, 7] total 88 [2024-11-09 04:38:00,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764185822] [2024-11-09 04:38:00,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:38:00,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-09 04:38:00,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:38:00,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-09 04:38:00,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3276, Invalid=9156, Unknown=0, NotChecked=0, Total=12432 [2024-11-09 04:38:00,424 INFO L87 Difference]: Start difference. First operand 3886 states and 4255 transitions. Second operand has 88 states, 88 states have (on average 2.6363636363636362) internal successors, (232), 88 states have internal predecessors, (232), 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 04:38:47,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:38:47,472 INFO L93 Difference]: Finished difference Result 10157 states and 12882 transitions. [2024-11-09 04:38:47,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 394 states. [2024-11-09 04:38:47,473 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.6363636363636362) internal successors, (232), 88 states have internal predecessors, (232), 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 2653 [2024-11-09 04:38:47,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:38:47,494 INFO L225 Difference]: With dead ends: 10157 [2024-11-09 04:38:47,495 INFO L226 Difference]: Without dead ends: 6427 [2024-11-09 04:38:47,514 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8578 GetRequests, 8059 SyntacticMatches, 19 SemanticMatches, 500 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86329 ImplicationChecksByTransitivity, 40.0s TimeCoverageRelationStatistics Valid=60447, Invalid=191055, Unknown=0, NotChecked=0, Total=251502 [2024-11-09 04:38:47,515 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 8090 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 1743 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8090 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 2795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1743 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:38:47,516 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8090 Valid, 378 Invalid, 2795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1743 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-09 04:38:47,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6427 states. [2024-11-09 04:38:48,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6427 to 4018. [2024-11-09 04:38:48,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4018 states, 4017 states have (on average 1.0990789146128952) internal successors, (4415), 4017 states have internal predecessors, (4415), 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 04:38:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4018 states to 4018 states and 4415 transitions. [2024-11-09 04:38:48,435 INFO L78 Accepts]: Start accepts. Automaton has 4018 states and 4415 transitions. Word has length 2653 [2024-11-09 04:38:48,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:38:48,436 INFO L471 AbstractCegarLoop]: Abstraction has 4018 states and 4415 transitions. [2024-11-09 04:38:48,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.6363636363636362) internal successors, (232), 88 states have internal predecessors, (232), 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 04:38:48,436 INFO L276 IsEmpty]: Start isEmpty. Operand 4018 states and 4415 transitions. [2024-11-09 04:38:48,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2710 [2024-11-09 04:38:48,492 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:38:48,493 INFO L215 NwaCegarLoop]: trace histogram [1216, 1216, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 13, 13, 7, 7, 7, 7, 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, 1, 1] [2024-11-09 04:38:48,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 04:38:48,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13983224-789c-4cf8-8e79-8332626c5301/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:38:48,694 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:38:48,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:38:48,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1453784731, now seen corresponding path program 13 times [2024-11-09 04:38:48,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:38:48,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820691161] [2024-11-09 04:38:48,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:38:48,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:38:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat