./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_palindrome_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/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_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_palindrome_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/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_291a5270-2f21-4331-9e58-de46d012da6a/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 270a2842345dc5b188d8b64dce3436ccc5910bc1472a41053bc5c00e7f4ceeb6 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:16:23,967 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:16:24,069 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:16:24,077 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:16:24,078 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:16:24,128 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:16:24,131 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:16:24,131 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:16:24,132 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:16:24,133 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:16:24,134 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:16:24,135 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:16:24,135 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:16:24,136 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:16:24,138 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:16:24,139 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:16:24,139 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:16:24,140 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:16:24,140 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:16:24,140 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:16:24,141 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:16:24,145 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:16:24,145 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:16:24,146 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:16:24,146 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:16:24,157 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:16:24,158 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:16:24,158 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:16:24,158 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:16:24,159 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:16:24,159 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:16:24,160 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:16:24,160 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:16:24,161 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:16:24,161 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:16:24,162 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:16:24,162 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:16:24,162 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:16:24,162 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:16:24,163 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:16:24,163 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:16:24,164 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:16:24,164 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:16:24,165 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:16:24,165 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:16:24,165 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:16:24,165 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:16:24,165 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_291a5270-2f21-4331-9e58-de46d012da6a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 270a2842345dc5b188d8b64dce3436ccc5910bc1472a41053bc5c00e7f4ceeb6 [2024-11-09 05:16:24,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:16:24,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:16:24,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:16:24,476 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:16:24,477 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:16:24,478 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-examples/standard_palindrome_ground.i Unable to find full path for "g++" [2024-11-09 05:16:26,612 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:16:26,861 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:16:26,862 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/sv-benchmarks/c/array-examples/standard_palindrome_ground.i [2024-11-09 05:16:26,873 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/data/d08c55dca/065e15b461fa4d0684bbf8d4a138fa09/FLAG1311a6594 [2024-11-09 05:16:26,899 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/data/d08c55dca/065e15b461fa4d0684bbf8d4a138fa09 [2024-11-09 05:16:26,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:16:26,904 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:16:26,905 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:16:26,906 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:16:26,917 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:16:26,921 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:16:26" (1/1) ... [2024-11-09 05:16:26,922 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b506b66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:26, skipping insertion in model container [2024-11-09 05:16:26,923 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:16:26" (1/1) ... [2024-11-09 05:16:26,958 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:16:27,210 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_291a5270-2f21-4331-9e58-de46d012da6a/sv-benchmarks/c/array-examples/standard_palindrome_ground.i[819,832] [2024-11-09 05:16:27,232 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:16:27,247 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:16:27,262 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_291a5270-2f21-4331-9e58-de46d012da6a/sv-benchmarks/c/array-examples/standard_palindrome_ground.i[819,832] [2024-11-09 05:16:27,273 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:16:27,299 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:16:27,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:27 WrapperNode [2024-11-09 05:16:27,300 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:16:27,301 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:16:27,302 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:16:27,302 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:16:27,310 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:27" (1/1) ... [2024-11-09 05:16:27,320 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:27" (1/1) ... [2024-11-09 05:16:27,340 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2024-11-09 05:16:27,342 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:16:27,343 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:16:27,343 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:16:27,343 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:16:27,353 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:27" (1/1) ... [2024-11-09 05:16:27,354 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:27" (1/1) ... [2024-11-09 05:16:27,360 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:27" (1/1) ... [2024-11-09 05:16:27,361 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:27" (1/1) ... [2024-11-09 05:16:27,370 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:27" (1/1) ... [2024-11-09 05:16:27,376 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:27" (1/1) ... [2024-11-09 05:16:27,377 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:27" (1/1) ... [2024-11-09 05:16:27,382 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:27" (1/1) ... [2024-11-09 05:16:27,384 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:16:27,385 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:16:27,388 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:16:27,388 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:16:27,389 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:27" (1/1) ... [2024-11-09 05:16:27,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:16:27,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:16:27,422 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:16:27,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:16:27,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:16:27,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:16:27,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 05:16:27,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 05:16:27,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:16:27,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:16:27,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 05:16:27,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 05:16:27,533 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:16:27,535 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:16:27,729 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-11-09 05:16:27,729 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:16:27,760 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:16:27,761 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 05:16:27,761 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:16:27 BoogieIcfgContainer [2024-11-09 05:16:27,761 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:16:27,765 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:16:27,765 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:16:27,770 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:16:27,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:16:26" (1/3) ... [2024-11-09 05:16:27,771 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@306b56a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:16:27, skipping insertion in model container [2024-11-09 05:16:27,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:27" (2/3) ... [2024-11-09 05:16:27,772 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@306b56a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:16:27, skipping insertion in model container [2024-11-09 05:16:27,772 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:16:27" (3/3) ... [2024-11-09 05:16:27,774 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_palindrome_ground.i [2024-11-09 05:16:27,797 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:16:27,797 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:16:27,881 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:16:27,890 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;@4cf82a34, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:16:27,890 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:16:27,896 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:16:27,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 05:16:27,906 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:16:27,907 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:16:27,908 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:16:27,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:16:27,917 INFO L85 PathProgramCache]: Analyzing trace with hash -249157758, now seen corresponding path program 1 times [2024-11-09 05:16:27,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:16:27,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733828976] [2024-11-09 05:16:27,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:27,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:16:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:28,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:16:28,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:16:28,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733828976] [2024-11-09 05:16:28,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733828976] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:16:28,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:16:28,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:16:28,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41903809] [2024-11-09 05:16:28,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:16:28,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:16:28,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:16:28,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:16:28,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:16:28,243 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:16:28,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:16:28,305 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2024-11-09 05:16:28,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:16:28,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2024-11-09 05:16:28,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:16:28,324 INFO L225 Difference]: With dead ends: 31 [2024-11-09 05:16:28,325 INFO L226 Difference]: Without dead ends: 17 [2024-11-09 05:16:28,328 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:16:28,334 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:16:28,337 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 23 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:16:28,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-09 05:16:28,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-09 05:16:28,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:16:28,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2024-11-09 05:16:28,386 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2024-11-09 05:16:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:16:28,386 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2024-11-09 05:16:28,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:16:28,387 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2024-11-09 05:16:28,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 05:16:28,388 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:16:28,388 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:16:28,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:16:28,389 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:16:28,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:16:28,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1819962196, now seen corresponding path program 1 times [2024-11-09 05:16:28,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:16:28,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657276092] [2024-11-09 05:16:28,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:28,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:16:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:16:28,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:16:28,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657276092] [2024-11-09 05:16:28,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657276092] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:16:28,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179727460] [2024-11-09 05:16:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:28,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:16:28,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:16:28,545 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:16:28,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:16:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:28,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:16:28,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:16:28,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:16:28,690 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:16:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:16:28,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179727460] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:16:28,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1870885108] [2024-11-09 05:16:28,750 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:16:28,750 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:16:28,754 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:16:28,761 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:16:28,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:16:29,380 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:16:29,593 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '162#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) 399996) (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) 0))) (<= 2 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 05:16:29,594 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:16:29,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:16:29,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-09 05:16:29,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57907040] [2024-11-09 05:16:29,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:16:29,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:16:29,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:16:29,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:16:29,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-11-09 05:16:29,600 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:16:29,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:16:29,676 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2024-11-09 05:16:29,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:16:29,677 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 05:16:29,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:16:29,678 INFO L225 Difference]: With dead ends: 36 [2024-11-09 05:16:29,678 INFO L226 Difference]: Without dead ends: 24 [2024-11-09 05:16:29,679 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-11-09 05:16:29,681 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:16:29,682 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 16 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:16:29,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-09 05:16:29,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-09 05:16:29,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:16:29,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-09 05:16:29,689 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 13 [2024-11-09 05:16:29,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:16:29,689 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-09 05:16:29,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:16:29,690 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-09 05:16:29,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 05:16:29,691 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:16:29,691 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:16:29,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 05:16:29,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:16:29,896 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:16:29,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:16:29,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1309311392, now seen corresponding path program 2 times [2024-11-09 05:16:29,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:16:29,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110372862] [2024-11-09 05:16:29,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:29,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:16:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:30,180 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 05:16:30,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:16:30,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110372862] [2024-11-09 05:16:30,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110372862] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:16:30,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964951642] [2024-11-09 05:16:30,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:16:30,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:16:30,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:16:30,187 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:16:30,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:16:30,278 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 05:16:30,279 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:16:30,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:16:30,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:16:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:16:30,309 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:16:30,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:16:30,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964951642] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:16:30,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [17437336] [2024-11-09 05:16:30,371 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:16:30,373 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:16:30,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:16:30,374 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:16:30,374 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:16:30,721 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:16:30,907 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '381#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) 399996) (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) 0))) (<= 2 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 05:16:30,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:16:30,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:16:30,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-09 05:16:30,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255382811] [2024-11-09 05:16:30,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:16:30,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 05:16:30,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:16:30,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 05:16:30,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:16:30,913 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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 05:16:31,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:16:31,050 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2024-11-09 05:16:31,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 05:16:31,051 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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 21 [2024-11-09 05:16:31,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:16:31,053 INFO L225 Difference]: With dead ends: 58 [2024-11-09 05:16:31,053 INFO L226 Difference]: Without dead ends: 44 [2024-11-09 05:16:31,053 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:16:31,055 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:16:31,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:16:31,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-09 05:16:31,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2024-11-09 05:16:31,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:16:31,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2024-11-09 05:16:31,068 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 21 [2024-11-09 05:16:31,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:16:31,069 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2024-11-09 05:16:31,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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 05:16:31,071 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2024-11-09 05:16:31,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 05:16:31,073 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:16:31,073 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:16:31,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:16:31,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:16:31,274 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:16:31,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:16:31,275 INFO L85 PathProgramCache]: Analyzing trace with hash -332520238, now seen corresponding path program 3 times [2024-11-09 05:16:31,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:16:31,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997181988] [2024-11-09 05:16:31,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:31,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:16:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-09 05:16:31,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:16:31,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997181988] [2024-11-09 05:16:31,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997181988] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:16:31,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057212413] [2024-11-09 05:16:31,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:16:31,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:16:31,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:16:31,565 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:16:31,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:16:31,682 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:16:31,682 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:16:31,684 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 05:16:31,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:16:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-09 05:16:31,740 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:16:32,007 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-09 05:16:32,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057212413] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:16:32,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [112759848] [2024-11-09 05:16:32,011 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:16:32,014 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:16:32,014 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:16:32,015 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:16:32,015 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:16:32,252 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:16:32,478 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '792#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) 399996) (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) 0))) (<= 2 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 05:16:32,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:16:32,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:16:32,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2024-11-09 05:16:32,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859414941] [2024-11-09 05:16:32,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:16:32,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 05:16:32,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:16:32,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 05:16:32,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2024-11-09 05:16:32,481 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:16:32,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:16:32,664 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2024-11-09 05:16:32,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 05:16:32,664 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 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 41 [2024-11-09 05:16:32,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:16:32,665 INFO L225 Difference]: With dead ends: 91 [2024-11-09 05:16:32,666 INFO L226 Difference]: Without dead ends: 66 [2024-11-09 05:16:32,666 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2024-11-09 05:16:32,669 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:16:32,670 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 51 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:16:32,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-09 05:16:32,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2024-11-09 05:16:32,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:16:32,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2024-11-09 05:16:32,707 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 41 [2024-11-09 05:16:32,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:16:32,708 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2024-11-09 05:16:32,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:16:32,712 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2024-11-09 05:16:32,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-09 05:16:32,713 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:16:32,713 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:16:32,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:16:32,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:16:32,916 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:16:32,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:16:32,918 INFO L85 PathProgramCache]: Analyzing trace with hash -290997079, now seen corresponding path program 4 times [2024-11-09 05:16:32,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:16:32,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705087441] [2024-11-09 05:16:32,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:32,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:16:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:33,729 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-09 05:16:33,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:16:33,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705087441] [2024-11-09 05:16:33,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705087441] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:16:33,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570416916] [2024-11-09 05:16:33,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:16:33,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:16:33,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:16:33,733 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:16:33,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:16:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:33,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 05:16:33,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:16:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-09 05:16:34,011 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:16:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-09 05:16:34,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570416916] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:16:34,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1535767379] [2024-11-09 05:16:34,834 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:16:34,835 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:16:34,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:16:34,837 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:16:34,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:16:35,025 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:16:35,311 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1438#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) 399996) (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) 0))) (<= 2 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 05:16:35,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:16:35,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:16:35,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 40 [2024-11-09 05:16:35,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082433754] [2024-11-09 05:16:35,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:16:35,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-09 05:16:35,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:16:35,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-09 05:16:35,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1391, Unknown=0, NotChecked=0, Total=2256 [2024-11-09 05:16:35,316 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:16:35,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:16:35,663 INFO L93 Difference]: Finished difference Result 153 states and 186 transitions. [2024-11-09 05:16:35,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-09 05:16:35,664 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 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 63 [2024-11-09 05:16:35,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:16:35,665 INFO L225 Difference]: With dead ends: 153 [2024-11-09 05:16:35,666 INFO L226 Difference]: Without dead ends: 126 [2024-11-09 05:16:35,667 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=865, Invalid=1391, Unknown=0, NotChecked=0, Total=2256 [2024-11-09 05:16:35,668 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 65 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:16:35,668 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 37 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:16:35,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-09 05:16:35,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2024-11-09 05:16:35,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:16:35,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2024-11-09 05:16:35,682 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 63 [2024-11-09 05:16:35,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:16:35,683 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2024-11-09 05:16:35,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:16:35,684 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2024-11-09 05:16:35,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 05:16:35,687 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:16:35,687 INFO L215 NwaCegarLoop]: trace histogram [38, 38, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:16:35,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 05:16:35,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:16:35,892 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:16:35,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:16:35,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1394577217, now seen corresponding path program 5 times [2024-11-09 05:16:35,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:16:35,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798497416] [2024-11-09 05:16:35,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:35,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:16:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2024-11-09 05:16:38,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:16:38,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798497416] [2024-11-09 05:16:38,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798497416] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:16:38,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723294244] [2024-11-09 05:16:38,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:16:38,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:16:38,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:16:38,231 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:16:38,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:17:02,100 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-11-09 05:17:02,100 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:17:02,114 INFO L255 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 05:17:02,119 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:17:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2024-11-09 05:17:02,244 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:17:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2024-11-09 05:17:03,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723294244] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:17:03,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [254626610] [2024-11-09 05:17:03,492 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:17:03,492 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:17:03,492 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:17:03,492 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:17:03,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:17:03,707 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:17:04,110 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2648#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) 399996) (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) 0))) (<= 2 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 05:17:04,110 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:17:04,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:17:04,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 22, 22] total 62 [2024-11-09 05:17:04,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136937331] [2024-11-09 05:17:04,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:17:04,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-09 05:17:04,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:17:04,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-09 05:17:04,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1916, Invalid=2776, Unknown=0, NotChecked=0, Total=4692 [2024-11-09 05:17:04,118 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 62 states, 62 states have (on average 2.7580645161290325) internal successors, (171), 62 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:04,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:17:04,910 INFO L93 Difference]: Finished difference Result 295 states and 359 transitions. [2024-11-09 05:17:04,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-09 05:17:04,912 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.7580645161290325) internal successors, (171), 62 states have internal predecessors, (171), 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 123 [2024-11-09 05:17:04,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:17:04,914 INFO L225 Difference]: With dead ends: 295 [2024-11-09 05:17:04,914 INFO L226 Difference]: Without dead ends: 248 [2024-11-09 05:17:04,918 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1916, Invalid=2776, Unknown=0, NotChecked=0, Total=4692 [2024-11-09 05:17:04,919 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 118 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:17:04,919 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 45 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:17:04,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-11-09 05:17:04,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2024-11-09 05:17:04,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.0121951219512195) internal successors, (249), 246 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:04,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 249 transitions. [2024-11-09 05:17:04,947 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 249 transitions. Word has length 123 [2024-11-09 05:17:04,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:17:04,947 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 249 transitions. [2024-11-09 05:17:04,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.7580645161290325) internal successors, (171), 62 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:04,948 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 249 transitions. [2024-11-09 05:17:04,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2024-11-09 05:17:04,956 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:17:04,956 INFO L215 NwaCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:17:04,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 05:17:05,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:17:05,157 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:17:05,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:17:05,157 INFO L85 PathProgramCache]: Analyzing trace with hash -357798608, now seen corresponding path program 6 times [2024-11-09 05:17:05,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:17:05,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245760713] [2024-11-09 05:17:05,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:17:05,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:17:05,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:17:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6962 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 3481 trivial. 0 not checked. [2024-11-09 05:17:09,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:17:09,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245760713] [2024-11-09 05:17:09,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245760713] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:17:09,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162539729] [2024-11-09 05:17:09,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:17:09,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:17:09,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:17:09,929 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:17:09,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:17:10,311 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:17:10,312 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:17:10,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-09 05:17:10,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:17:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6962 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 3481 trivial. 0 not checked. [2024-11-09 05:17:10,578 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:17:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6962 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 3481 trivial. 0 not checked. [2024-11-09 05:17:15,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162539729] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:17:15,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [169979522] [2024-11-09 05:17:15,644 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:17:15,644 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:17:15,644 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:17:15,645 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:17:15,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:17:15,829 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:17:16,260 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5047#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) 399996) (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) 0))) (<= 2 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 05:17:16,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:17:16,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:17:16,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 122 [2024-11-09 05:17:16,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46009131] [2024-11-09 05:17:16,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:17:16,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2024-11-09 05:17:16,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:17:16,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2024-11-09 05:17:16,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7589, Invalid=9181, Unknown=0, NotChecked=0, Total=16770 [2024-11-09 05:17:16,288 INFO L87 Difference]: Start difference. First operand 247 states and 249 transitions. Second operand has 123 states, 123 states have (on average 2.048780487804878) internal successors, (252), 122 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:18,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:17:18,229 INFO L93 Difference]: Finished difference Result 499 states and 564 transitions. [2024-11-09 05:17:18,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2024-11-09 05:17:18,230 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.048780487804878) internal successors, (252), 122 states have internal predecessors, (252), 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 245 [2024-11-09 05:17:18,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:17:18,233 INFO L225 Difference]: With dead ends: 499 [2024-11-09 05:17:18,233 INFO L226 Difference]: Without dead ends: 372 [2024-11-09 05:17:18,237 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 666 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=7589, Invalid=9181, Unknown=0, NotChecked=0, Total=16770 [2024-11-09 05:17:18,238 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 288 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:17:18,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 65 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 05:17:18,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2024-11-09 05:17:18,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 371. [2024-11-09 05:17:18,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.008108108108108) internal successors, (373), 370 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:18,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 373 transitions. [2024-11-09 05:17:18,269 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 373 transitions. Word has length 245 [2024-11-09 05:17:18,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:17:18,270 INFO L471 AbstractCegarLoop]: Abstraction has 371 states and 373 transitions. [2024-11-09 05:17:18,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.048780487804878) internal successors, (252), 122 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:18,271 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 373 transitions. [2024-11-09 05:17:18,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2024-11-09 05:17:18,278 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:17:18,279 INFO L215 NwaCegarLoop]: trace histogram [120, 120, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:17:18,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 05:17:18,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:17:18,480 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:17:18,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:17:18,480 INFO L85 PathProgramCache]: Analyzing trace with hash 135614470, now seen corresponding path program 7 times [2024-11-09 05:17:18,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:17:18,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144648526] [2024-11-09 05:17:18,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:17:18,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:17:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:17:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18000 backedges. 0 proven. 14400 refuted. 0 times theorem prover too weak. 3600 trivial. 0 not checked. [2024-11-09 05:17:31,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:17:31,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144648526] [2024-11-09 05:17:31,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144648526] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:17:31,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358667521] [2024-11-09 05:17:31,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:17:31,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:17:31,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:17:31,390 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:17:31,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:17:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:17:31,984 INFO L255 TraceCheckSpWp]: Trace formula consists of 1730 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-11-09 05:17:31,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:17:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 18000 backedges. 0 proven. 14400 refuted. 0 times theorem prover too weak. 3600 trivial. 0 not checked. [2024-11-09 05:17:32,456 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:17:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18000 backedges. 0 proven. 14400 refuted. 0 times theorem prover too weak. 3600 trivial. 0 not checked. [2024-11-09 05:17:52,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358667521] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:17:52,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1682415936] [2024-11-09 05:17:52,178 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:17:52,178 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:17:52,179 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:17:52,179 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:17:52,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:17:52,432 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:17:53,219 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8804#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) 399996) (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) 0))) (<= 2 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 05:17:53,219 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:17:53,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:17:53,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122, 122] total 244 [2024-11-09 05:17:53,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655975730] [2024-11-09 05:17:53,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:17:53,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 245 states [2024-11-09 05:17:53,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:17:53,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 245 interpolants. [2024-11-09 05:17:53,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30037, Invalid=33215, Unknown=0, NotChecked=0, Total=63252 [2024-11-09 05:17:53,236 INFO L87 Difference]: Start difference. First operand 371 states and 373 transitions. Second operand has 245 states, 245 states have (on average 2.024489795918367) internal successors, (496), 244 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:18:09,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:18:09,386 INFO L93 Difference]: Finished difference Result 867 states and 1053 transitions. [2024-11-09 05:18:09,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 244 states. [2024-11-09 05:18:09,387 INFO L78 Accepts]: Start accepts. Automaton has has 245 states, 245 states have (on average 2.024489795918367) internal successors, (496), 244 states have internal predecessors, (496), 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 369 [2024-11-09 05:18:09,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:18:09,392 INFO L225 Difference]: With dead ends: 867 [2024-11-09 05:18:09,393 INFO L226 Difference]: Without dead ends: 738 [2024-11-09 05:18:09,404 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1227 GetRequests, 977 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2911 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=30037, Invalid=33215, Unknown=0, NotChecked=0, Total=63252 [2024-11-09 05:18:09,405 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 525 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:18:09,405 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 58 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 05:18:09,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2024-11-09 05:18:09,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 737. [2024-11-09 05:18:09,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 1.0040760869565217) internal successors, (739), 736 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:18:09,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 739 transitions. [2024-11-09 05:18:09,484 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 739 transitions. Word has length 369 [2024-11-09 05:18:09,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:18:09,487 INFO L471 AbstractCegarLoop]: Abstraction has 737 states and 739 transitions. [2024-11-09 05:18:09,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 245 states, 245 states have (on average 2.024489795918367) internal successors, (496), 244 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:18:09,488 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 739 transitions. [2024-11-09 05:18:09,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2024-11-09 05:18:09,530 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:18:09,530 INFO L215 NwaCegarLoop]: trace histogram [242, 242, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:18:09,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 05:18:09,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:18:09,731 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:18:09,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:18:09,732 INFO L85 PathProgramCache]: Analyzing trace with hash 612561721, now seen corresponding path program 8 times [2024-11-09 05:18:09,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:18:09,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134779029] [2024-11-09 05:18:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:18:09,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:18:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:19:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 73205 backedges. 0 proven. 58564 refuted. 0 times theorem prover too weak. 14641 trivial. 0 not checked. [2024-11-09 05:19:00,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:19:00,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134779029] [2024-11-09 05:19:00,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134779029] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:19:00,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699268133] [2024-11-09 05:19:00,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:19:00,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:19:00,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:19:00,681 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:19:00,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291a5270-2f21-4331-9e58-de46d012da6a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process