./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/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_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/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_f3ac398b-211e-419e-baff-59f73e1f860c/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 6dcb150490c6daa5a1cdb1426c8815f073186f609bef3d7e722a6c72be49ca91 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 07:17:22,245 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 07:17:22,310 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 07:17:22,315 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 07:17:22,315 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 07:17:22,351 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 07:17:22,352 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 07:17:22,352 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 07:17:22,353 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 07:17:22,353 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 07:17:22,354 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 07:17:22,354 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 07:17:22,354 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 07:17:22,355 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 07:17:22,355 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 07:17:22,355 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 07:17:22,356 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 07:17:22,356 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 07:17:22,357 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 07:17:22,357 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 07:17:22,357 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 07:17:22,362 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 07:17:22,362 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 07:17:22,362 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 07:17:22,363 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 07:17:22,363 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 07:17:22,363 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 07:17:22,363 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 07:17:22,364 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 07:17:22,364 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 07:17:22,364 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 07:17:22,364 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 07:17:22,364 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 07:17:22,365 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 07:17:22,365 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 07:17:22,366 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 07:17:22,367 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 07:17:22,367 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 07:17:22,368 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:17:22,368 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 07:17:22,369 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 07:17:22,369 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 07:17:22,370 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 07:17:22,370 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 07:17:22,370 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 07:17:22,371 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 07:17:22,371 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 07:17:22,371 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_f3ac398b-211e-419e-baff-59f73e1f860c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6dcb150490c6daa5a1cdb1426c8815f073186f609bef3d7e722a6c72be49ca91 [2024-11-09 07:17:22,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 07:17:22,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 07:17:22,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 07:17:22,699 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 07:17:22,700 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 07:17:22,701 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i Unable to find full path for "g++" [2024-11-09 07:17:24,812 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 07:17:25,045 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 07:17:25,046 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i [2024-11-09 07:17:25,054 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/data/4922006e8/411f0bc0dace41b180fe4178a264fdd8/FLAGa7303f641 [2024-11-09 07:17:25,072 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/data/4922006e8/411f0bc0dace41b180fe4178a264fdd8 [2024-11-09 07:17:25,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 07:17:25,077 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 07:17:25,079 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 07:17:25,079 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 07:17:25,087 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 07:17:25,088 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:17:25" (1/1) ... [2024-11-09 07:17:25,092 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dedf63e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:25, skipping insertion in model container [2024-11-09 07:17:25,092 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:17:25" (1/1) ... [2024-11-09 07:17:25,114 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 07:17:25,291 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_f3ac398b-211e-419e-baff-59f73e1f860c/sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i[919,932] [2024-11-09 07:17:25,307 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:17:25,316 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 07:17:25,330 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_f3ac398b-211e-419e-baff-59f73e1f860c/sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i[919,932] [2024-11-09 07:17:25,335 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:17:25,354 INFO L204 MainTranslator]: Completed translation [2024-11-09 07:17:25,354 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:25 WrapperNode [2024-11-09 07:17:25,354 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 07:17:25,356 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 07:17:25,356 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 07:17:25,356 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 07:17:25,364 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:25" (1/1) ... [2024-11-09 07:17:25,371 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:25" (1/1) ... [2024-11-09 07:17:25,389 INFO L138 Inliner]: procedures = 17, calls = 12, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 44 [2024-11-09 07:17:25,389 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 07:17:25,390 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 07:17:25,390 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 07:17:25,391 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 07:17:25,400 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:25" (1/1) ... [2024-11-09 07:17:25,400 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:25" (1/1) ... [2024-11-09 07:17:25,402 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:25" (1/1) ... [2024-11-09 07:17:25,402 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:25" (1/1) ... [2024-11-09 07:17:25,407 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:25" (1/1) ... [2024-11-09 07:17:25,410 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:25" (1/1) ... [2024-11-09 07:17:25,411 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:25" (1/1) ... [2024-11-09 07:17:25,412 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:25" (1/1) ... [2024-11-09 07:17:25,414 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 07:17:25,415 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 07:17:25,415 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 07:17:25,415 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 07:17:25,416 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:25" (1/1) ... [2024-11-09 07:17:25,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:17:25,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:17:25,448 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 07:17:25,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 07:17:25,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 07:17:25,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 07:17:25,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 07:17:25,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 07:17:25,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 07:17:25,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 07:17:25,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 07:17:25,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 07:17:25,574 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 07:17:25,577 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 07:17:25,781 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-09 07:17:25,781 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 07:17:25,843 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 07:17:25,846 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 07:17:25,846 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:17:25 BoogieIcfgContainer [2024-11-09 07:17:25,847 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 07:17:25,851 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 07:17:25,852 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 07:17:25,856 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 07:17:25,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 07:17:25" (1/3) ... [2024-11-09 07:17:25,857 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5567d1be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:17:25, skipping insertion in model container [2024-11-09 07:17:25,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:25" (2/3) ... [2024-11-09 07:17:25,859 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5567d1be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:17:25, skipping insertion in model container [2024-11-09 07:17:25,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:17:25" (3/3) ... [2024-11-09 07:17:25,860 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.i [2024-11-09 07:17:25,879 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 07:17:25,880 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 07:17:25,955 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 07:17:25,961 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;@7f2fe969, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 07:17:25,961 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 07:17:25,967 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 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 07:17:25,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 07:17:25,973 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:17:25,974 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:17:25,974 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:17:25,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:17:25,979 INFO L85 PathProgramCache]: Analyzing trace with hash 354563739, now seen corresponding path program 1 times [2024-11-09 07:17:25,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:17:25,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126942734] [2024-11-09 07:17:25,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:25,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:17:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:26,275 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 07:17:26,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:17:26,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126942734] [2024-11-09 07:17:26,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126942734] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:17:26,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:17:26,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 07:17:26,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590757411] [2024-11-09 07:17:26,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:17:26,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:17:26,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:17:26,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:17:26,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:17:26,308 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 07:17:26,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:17:26,397 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2024-11-09 07:17:26,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:17:26,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2024-11-09 07:17:26,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:17:26,409 INFO L225 Difference]: With dead ends: 29 [2024-11-09 07:17:26,409 INFO L226 Difference]: Without dead ends: 18 [2024-11-09 07:17:26,412 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 07:17:26,416 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:17:26,417 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:17:26,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-09 07:17:26,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2024-11-09 07:17:26,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:17:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2024-11-09 07:17:26,446 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2024-11-09 07:17:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:17:26,447 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2024-11-09 07:17:26,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 07:17:26,447 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2024-11-09 07:17:26,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 07:17:26,448 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:17:26,448 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:17:26,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 07:17:26,449 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:17:26,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:17:26,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1846317644, now seen corresponding path program 1 times [2024-11-09 07:17:26,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:17:26,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591428517] [2024-11-09 07:17:26,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:26,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:17:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:17:26,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:17:26,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591428517] [2024-11-09 07:17:26,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591428517] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:17:26,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166252142] [2024-11-09 07:17:26,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:26,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:17:26,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:17:26,773 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:17:26,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 07:17:26,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:26,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 07:17:26,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:17:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:17:26,924 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:17:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:17:26,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166252142] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:17:26,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1288166205] [2024-11-09 07:17:26,996 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 07:17:26,997 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:17:27,001 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:17:27,008 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:17:27,008 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:17:27,619 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:17:27,929 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '124#(and (exists ((|v_ULTIMATE.start_main_~index~0#1_37| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~index~0#1_37|) (<= 10000 (mod |v_ULTIMATE.start_main_~index~0#1_37| 4294967296)) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))) (= |ULTIMATE.start_main_~index~0#1| 0) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= (mod (select (select |#memory_int| |ULTIMATE.start_main_~#array~0#1.base|) 0) 4294967296) 0))' at error location [2024-11-09 07:17:27,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:17:27,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:17:27,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-09 07:17:27,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299704481] [2024-11-09 07:17:27,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:17:27,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 07:17:27,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:17:27,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 07:17:27,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2024-11-09 07:17:27,935 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:17:28,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:17:28,076 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2024-11-09 07:17:28,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 07:17:28,077 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-09 07:17:28,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:17:28,078 INFO L225 Difference]: With dead ends: 43 [2024-11-09 07:17:28,078 INFO L226 Difference]: Without dead ends: 36 [2024-11-09 07:17:28,078 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2024-11-09 07:17:28,079 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 49 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:17:28,082 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 20 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:17:28,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-09 07:17:28,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 17. [2024-11-09 07:17:28,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 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 07:17:28,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2024-11-09 07:17:28,088 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2024-11-09 07:17:28,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:17:28,088 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2024-11-09 07:17:28,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:17:28,089 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2024-11-09 07:17:28,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 07:17:28,089 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:17:28,090 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:17:28,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 07:17:28,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-09 07:17:28,291 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:17:28,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:17:28,292 INFO L85 PathProgramCache]: Analyzing trace with hash 24835039, now seen corresponding path program 2 times [2024-11-09 07:17:28,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:17:28,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828125266] [2024-11-09 07:17:28,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:28,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:17:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:28,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:17:28,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:17:28,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828125266] [2024-11-09 07:17:28,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828125266] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:17:28,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563432517] [2024-11-09 07:17:28,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:17:28,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:17:28,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:17:28,664 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:17:28,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 07:17:28,771 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 07:17:28,771 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:17:28,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-09 07:17:28,781 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:17:28,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 07:17:28,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-09 07:17:28,959 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:17:28,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2024-11-09 07:17:29,033 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:17:29,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2024-11-09 07:17:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:17:29,071 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:17:47,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2024-11-09 07:17:47,976 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:17:47,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2024-11-09 07:17:48,043 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:17:48,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 33 [2024-11-09 07:17:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:17:56,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563432517] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:17:56,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1782215796] [2024-11-09 07:17:56,226 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 07:17:56,226 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:17:56,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:17:56,227 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:17:56,227 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:17:56,426 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:17:56,793 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '315#(and (exists ((|v_ULTIMATE.start_main_~index~0#1_51| Int)) (and (<= 1 |v_ULTIMATE.start_main_~index~0#1_51|) (<= 1 |#StackHeapBarrier|) (<= 10000 (mod |v_ULTIMATE.start_main_~index~0#1_51| 4294967296)) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))) (= |ULTIMATE.start_main_~index~0#1| 0) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= (mod (select (select |#memory_int| |ULTIMATE.start_main_~#array~0#1.base|) 0) 4294967296) 0))' at error location [2024-11-09 07:17:56,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:17:56,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:17:56,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 12] total 21 [2024-11-09 07:17:56,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067710050] [2024-11-09 07:17:56,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:17:56,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 07:17:56,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:17:56,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 07:17:56,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=573, Unknown=2, NotChecked=0, Total=756 [2024-11-09 07:17:56,797 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 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 07:17:59,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:17:59,335 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2024-11-09 07:17:59,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 07:17:59,336 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-09 07:17:59,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:17:59,337 INFO L225 Difference]: With dead ends: 63 [2024-11-09 07:17:59,337 INFO L226 Difference]: Without dead ends: 56 [2024-11-09 07:17:59,338 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=275, Invalid=845, Unknown=2, NotChecked=0, Total=1122 [2024-11-09 07:17:59,339 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 226 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:17:59,340 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 83 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:17:59,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-09 07:17:59,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 22. [2024-11-09 07:17:59,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:17:59,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2024-11-09 07:17:59,347 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2024-11-09 07:17:59,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:17:59,347 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2024-11-09 07:17:59,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 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 07:17:59,348 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2024-11-09 07:17:59,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 07:17:59,348 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:17:59,348 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:17:59,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 07:17:59,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:17:59,549 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:17:59,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:17:59,550 INFO L85 PathProgramCache]: Analyzing trace with hash -271951624, now seen corresponding path program 1 times [2024-11-09 07:17:59,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:17:59,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240560351] [2024-11-09 07:17:59,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:59,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:17:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 07:17:59,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:17:59,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240560351] [2024-11-09 07:17:59,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240560351] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:17:59,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230656458] [2024-11-09 07:17:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:59,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:17:59,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:17:59,855 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:17:59,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 07:17:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:59,951 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-09 07:17:59,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:17:59,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 07:18:00,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-11-09 07:18:00,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 29 [2024-11-09 07:18:00,192 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:18:00,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 43 [2024-11-09 07:18:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:18:00,463 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:18:19,711 WARN L286 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:18:19,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2024-11-09 07:18:19,977 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:18:19,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 95 [2024-11-09 07:18:30,219 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:18:30,333 INFO L349 Elim1Store]: treesize reduction 34, result has 29.2 percent of original size [2024-11-09 07:18:30,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 199 treesize of output 160 [2024-11-09 07:18:42,546 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:18:42,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 71 [2024-11-09 07:19:01,003 WARN L286 SmtUtils]: Spent 8.27s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:19:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:19:03,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230656458] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:19:03,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [346250569] [2024-11-09 07:19:03,266 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 07:19:03,266 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:19:03,266 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:19:03,267 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:19:03,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:19:03,594 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:19:04,451 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '587#(and (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= (mod |ULTIMATE.start_main_~index~0#1| 4294967296) 9999) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= (mod (select (select |#memory_int| |ULTIMATE.start_main_~#array~0#1.base|) (* (mod |ULTIMATE.start_main_~index~0#1| 4294967296) 4)) 4294967296) (mod |ULTIMATE.start_main_~index~0#1| 4294967296)))' at error location [2024-11-09 07:19:04,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:19:04,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:19:04,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 13] total 25 [2024-11-09 07:19:04,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758772954] [2024-11-09 07:19:04,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:19:04,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 07:19:04,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:19:04,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 07:19:04,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=978, Unknown=1, NotChecked=0, Total=1122 [2024-11-09 07:19:04,455 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 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 07:19:05,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:19:05,765 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2024-11-09 07:19:05,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 07:19:05,766 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 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 07:19:05,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:19:05,767 INFO L225 Difference]: With dead ends: 72 [2024-11-09 07:19:05,767 INFO L226 Difference]: Without dead ends: 62 [2024-11-09 07:19:05,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=259, Invalid=1462, Unknown=1, NotChecked=0, Total=1722 [2024-11-09 07:19:05,769 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 127 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:19:05,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 47 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 07:19:05,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-09 07:19:05,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 36. [2024-11-09 07:19:05,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 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 07:19:05,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-11-09 07:19:05,781 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 21 [2024-11-09 07:19:05,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:19:05,781 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-11-09 07:19:05,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 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 07:19:05,782 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-11-09 07:19:05,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 07:19:05,783 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:19:05,783 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2024-11-09 07:19:05,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 07:19:05,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:19:05,984 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:19:05,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:19:05,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1486270625, now seen corresponding path program 2 times [2024-11-09 07:19:05,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:19:05,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700099397] [2024-11-09 07:19:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:19:05,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:19:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 07:19:06,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:19:06,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700099397] [2024-11-09 07:19:06,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700099397] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:19:06,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491575173] [2024-11-09 07:19:06,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:19:06,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:19:06,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:19:06,300 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:19:06,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 07:19:06,814 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-09 07:19:06,814 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:19:06,816 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-09 07:19:06,820 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:19:06,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 07:19:06,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-11-09 07:19:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:19:07,197 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:19:07,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2024-11-09 07:19:07,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 70 [2024-11-09 07:19:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:19:08,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491575173] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:19:08,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [6458937] [2024-11-09 07:19:08,330 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 07:19:08,331 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:19:08,331 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:19:08,332 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:19:08,332 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:19:08,638 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:19:09,251 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '982#(and (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= (mod |ULTIMATE.start_main_~index~0#1| 4294967296) 9999) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= (mod (select (select |#memory_int| |ULTIMATE.start_main_~#array~0#1.base|) (* (mod |ULTIMATE.start_main_~index~0#1| 4294967296) 4)) 4294967296) (mod |ULTIMATE.start_main_~index~0#1| 4294967296)))' at error location [2024-11-09 07:19:09,251 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:19:09,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:19:09,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 28 [2024-11-09 07:19:09,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86406468] [2024-11-09 07:19:09,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:19:09,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 07:19:09,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:19:09,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 07:19:09,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1206, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 07:19:09,255 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:19:09,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:19:09,997 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2024-11-09 07:19:09,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 07:19:09,998 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-09 07:19:09,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:19:09,999 INFO L225 Difference]: With dead ends: 78 [2024-11-09 07:19:09,999 INFO L226 Difference]: Without dead ends: 56 [2024-11-09 07:19:10,000 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=146, Invalid=1336, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 07:19:10,004 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:19:10,004 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 116 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 07:19:10,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-09 07:19:10,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2024-11-09 07:19:10,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:19:10,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2024-11-09 07:19:10,026 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 35 [2024-11-09 07:19:10,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:19:10,027 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2024-11-09 07:19:10,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:19:10,027 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2024-11-09 07:19:10,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 07:19:10,028 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:19:10,029 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2024-11-09 07:19:10,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 07:19:10,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:19:10,230 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:19:10,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:19:10,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1033117126, now seen corresponding path program 3 times [2024-11-09 07:19:10,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:19:10,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888544521] [2024-11-09 07:19:10,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:19:10,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:19:10,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:10,662 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 07:19:10,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:19:10,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888544521] [2024-11-09 07:19:10,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888544521] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:19:10,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989205597] [2024-11-09 07:19:10,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:19:10,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:19:10,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:19:10,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:19:10,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 07:19:10,853 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:19:10,853 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:19:10,855 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-09 07:19:10,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:19:10,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 07:19:10,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-11-09 07:19:11,311 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:19:11,312 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:19:12,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2024-11-09 07:19:12,854 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:19:12,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 95 [2024-11-09 07:19:12,991 INFO L349 Elim1Store]: treesize reduction 34, result has 29.2 percent of original size [2024-11-09 07:19:12,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 139 treesize of output 76 [2024-11-09 07:19:13,014 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:19:13,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 37 [2024-11-09 07:19:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:19:13,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989205597] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:19:13,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1391847214] [2024-11-09 07:19:13,686 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 07:19:13,686 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:19:13,686 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:19:13,686 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:19:13,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:19:13,963 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:19:14,719 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1427#(and (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= (mod |ULTIMATE.start_main_~index~0#1| 4294967296) 9999) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= (mod (select (select |#memory_int| |ULTIMATE.start_main_~#array~0#1.base|) (* (mod |ULTIMATE.start_main_~index~0#1| 4294967296) 4)) 4294967296) (mod |ULTIMATE.start_main_~index~0#1| 4294967296)))' at error location [2024-11-09 07:19:14,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:19:14,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:19:14,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 20] total 37 [2024-11-09 07:19:14,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557350462] [2024-11-09 07:19:14,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:19:14,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-09 07:19:14,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:19:14,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-09 07:19:14,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1893, Unknown=0, NotChecked=0, Total=2070 [2024-11-09 07:19:14,723 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 37 states have internal predecessors, (90), 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 07:19:16,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:19:16,055 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2024-11-09 07:19:16,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 07:19:16,056 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 37 states have internal predecessors, (90), 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 07:19:16,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:19:16,057 INFO L225 Difference]: With dead ends: 88 [2024-11-09 07:19:16,057 INFO L226 Difference]: Without dead ends: 62 [2024-11-09 07:19:16,059 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2024-11-09 07:19:16,060 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:19:16,060 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 151 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 07:19:16,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-09 07:19:16,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2024-11-09 07:19:16,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:19:16,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-11-09 07:19:16,096 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 41 [2024-11-09 07:19:16,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:19:16,097 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-11-09 07:19:16,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 37 states have internal predecessors, (90), 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 07:19:16,097 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-11-09 07:19:16,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 07:19:16,098 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:19:16,099 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 1, 1, 1, 1, 1] [2024-11-09 07:19:16,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 07:19:16,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 07:19:16,299 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:19:16,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:19:16,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1128376685, now seen corresponding path program 4 times [2024-11-09 07:19:16,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:19:16,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301507211] [2024-11-09 07:19:16,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:19:16,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:19:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:16,826 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-09 07:19:16,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:19:16,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301507211] [2024-11-09 07:19:16,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301507211] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:19:16,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265641242] [2024-11-09 07:19:16,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:19:16,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:19:16,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:19:16,829 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:19:16,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 07:19:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:16,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 07:19:16,985 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:19:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-09 07:19:17,051 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:19:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-09 07:19:17,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265641242] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:19:17,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1835514672] [2024-11-09 07:19:17,356 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 07:19:17,356 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:19:17,356 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:19:17,357 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:19:17,357 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:19:17,654 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:19:18,153 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1912#(and (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= (mod |ULTIMATE.start_main_~index~0#1| 4294967296) 9999) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= (mod (select (select |#memory_int| |ULTIMATE.start_main_~#array~0#1.base|) (* (mod |ULTIMATE.start_main_~index~0#1| 4294967296) 4)) 4294967296) (mod |ULTIMATE.start_main_~index~0#1| 4294967296)))' at error location [2024-11-09 07:19:18,153 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:19:18,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:19:18,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2024-11-09 07:19:18,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769234753] [2024-11-09 07:19:18,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:19:18,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 07:19:18,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:19:18,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 07:19:18,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2024-11-09 07:19:18,156 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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 07:19:20,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:19:20,127 INFO L93 Difference]: Finished difference Result 166 states and 177 transitions. [2024-11-09 07:19:20,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 07:19:20,128 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-11-09 07:19:20,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:19:20,129 INFO L225 Difference]: With dead ends: 166 [2024-11-09 07:19:20,129 INFO L226 Difference]: Without dead ends: 136 [2024-11-09 07:19:20,130 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 07:19:20,131 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 392 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:19:20,131 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 164 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 07:19:20,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-09 07:19:20,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 68. [2024-11-09 07:19:20,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 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 07:19:20,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2024-11-09 07:19:20,162 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 47 [2024-11-09 07:19:20,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:19:20,163 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2024-11-09 07:19:20,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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 07:19:20,163 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2024-11-09 07:19:20,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-09 07:19:20,165 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:19:20,165 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 7, 7, 6, 6, 1, 1, 1, 1, 1] [2024-11-09 07:19:20,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 07:19:20,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 07:19:20,370 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:19:20,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:19:20,371 INFO L85 PathProgramCache]: Analyzing trace with hash 978708029, now seen corresponding path program 5 times [2024-11-09 07:19:20,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:19:20,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758127926] [2024-11-09 07:19:20,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:19:20,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:19:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:21,479 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-09 07:19:21,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:19:21,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758127926] [2024-11-09 07:19:21,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758127926] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:19:21,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037872899] [2024-11-09 07:19:21,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:19:21,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:19:21,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:19:21,481 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:19:21,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ac398b-211e-419e-baff-59f73e1f860c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process