./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_seq_init_ground.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_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/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_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_seq_init_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/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_544641b9-a955-464f-a3fa-f73a0573f43f/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 eab386bb7401f51a7807d88da5762f33f54a558b2c1945526724b989e81d1d36 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:18:01,963 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:18:02,062 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:18:02,076 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:18:02,076 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:18:02,120 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:18:02,121 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:18:02,122 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:18:02,123 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:18:02,123 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:18:02,124 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:18:02,124 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:18:02,125 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:18:02,129 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:18:02,130 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:18:02,130 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:18:02,130 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:18:02,131 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:18:02,131 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:18:02,132 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:18:02,132 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:18:02,133 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:18:02,137 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:18:02,137 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:18:02,138 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:18:02,138 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:18:02,139 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:18:02,139 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:18:02,139 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:18:02,143 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:18:02,144 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:18:02,144 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:18:02,144 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:18:02,145 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:18:02,145 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:18:02,145 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:18:02,146 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:18:02,146 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:18:02,146 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:18:02,147 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:18:02,147 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:18:02,148 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:18:02,148 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:18:02,149 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:18:02,149 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:18:02,149 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:18:02,149 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:18:02,150 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_544641b9-a955-464f-a3fa-f73a0573f43f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eab386bb7401f51a7807d88da5762f33f54a558b2c1945526724b989e81d1d36 [2024-11-09 05:18:02,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:18:02,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:18:02,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:18:02,564 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:18:02,565 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:18:02,566 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-examples/standard_seq_init_ground.i Unable to find full path for "g++" [2024-11-09 05:18:04,772 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:18:04,956 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:18:04,956 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/sv-benchmarks/c/array-examples/standard_seq_init_ground.i [2024-11-09 05:18:04,965 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/data/b83894181/44e0211850144a5a81a671a9cdbacf8c/FLAG8b9b12d7e [2024-11-09 05:18:04,994 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/data/b83894181/44e0211850144a5a81a671a9cdbacf8c [2024-11-09 05:18:04,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:18:04,998 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:18:05,000 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:18:05,000 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:18:05,007 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:18:05,008 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:18:04" (1/1) ... [2024-11-09 05:18:05,009 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e0affff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:18:05, skipping insertion in model container [2024-11-09 05:18:05,009 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:18:04" (1/1) ... [2024-11-09 05:18:05,034 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:18:05,243 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_544641b9-a955-464f-a3fa-f73a0573f43f/sv-benchmarks/c/array-examples/standard_seq_init_ground.i[817,830] [2024-11-09 05:18:05,261 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:18:05,270 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:18:05,283 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_544641b9-a955-464f-a3fa-f73a0573f43f/sv-benchmarks/c/array-examples/standard_seq_init_ground.i[817,830] [2024-11-09 05:18:05,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:18:05,307 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:18:05,307 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:18:05 WrapperNode [2024-11-09 05:18:05,308 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:18:05,309 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:18:05,309 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:18:05,309 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:18:05,319 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:18:05" (1/1) ... [2024-11-09 05:18:05,327 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:18:05" (1/1) ... [2024-11-09 05:18:05,343 INFO L138 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2024-11-09 05:18:05,344 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:18:05,345 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:18:05,345 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:18:05,345 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:18:05,356 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:18:05" (1/1) ... [2024-11-09 05:18:05,356 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:18:05" (1/1) ... [2024-11-09 05:18:05,358 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:18:05" (1/1) ... [2024-11-09 05:18:05,358 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:18:05" (1/1) ... [2024-11-09 05:18:05,364 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:18:05" (1/1) ... [2024-11-09 05:18:05,368 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:18:05" (1/1) ... [2024-11-09 05:18:05,369 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:18:05" (1/1) ... [2024-11-09 05:18:05,370 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:18:05" (1/1) ... [2024-11-09 05:18:05,372 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:18:05,373 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:18:05,373 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:18:05,374 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:18:05,375 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:18:05" (1/1) ... [2024-11-09 05:18:05,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:18:05,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:18:05,421 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:18:05,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:18:05,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:18:05,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:18:05,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 05:18:05,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 05:18:05,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:18:05,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:18:05,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 05:18:05,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 05:18:05,533 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:18:05,535 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:18:05,685 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-09 05:18:05,685 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:18:05,717 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:18:05,717 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 05:18:05,718 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:18:05 BoogieIcfgContainer [2024-11-09 05:18:05,718 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:18:05,722 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:18:05,722 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:18:05,726 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:18:05,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:18:04" (1/3) ... [2024-11-09 05:18:05,728 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@781c169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:18:05, skipping insertion in model container [2024-11-09 05:18:05,728 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:18:05" (2/3) ... [2024-11-09 05:18:05,729 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@781c169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:18:05, skipping insertion in model container [2024-11-09 05:18:05,729 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:18:05" (3/3) ... [2024-11-09 05:18:05,731 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_seq_init_ground.i [2024-11-09 05:18:05,755 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:18:05,756 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:18:05,831 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:18:05,841 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;@75794873, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:18:05,842 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:18:05,848 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 05:18:05,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 05:18:05,858 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:18:05,859 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:18:05,860 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:18:05,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:18:05,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1637384691, now seen corresponding path program 1 times [2024-11-09 05:18:05,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:18:05,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805548099] [2024-11-09 05:18:05,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:18:05,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:18:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:18:06,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:18:06,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:18:06,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805548099] [2024-11-09 05:18:06,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805548099] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:18:06,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:18:06,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:18:06,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493959952] [2024-11-09 05:18:06,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:18:06,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:18:06,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:18:06,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:18:06,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:18:06,302 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 05:18:06,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:18:06,349 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2024-11-09 05:18:06,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:18:06,352 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 05:18:06,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:18:06,362 INFO L225 Difference]: With dead ends: 23 [2024-11-09 05:18:06,363 INFO L226 Difference]: Without dead ends: 12 [2024-11-09 05:18:06,370 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:18:06,380 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:18:06,385 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:18:06,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-09 05:18:06,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-11-09 05:18:06,427 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 05:18:06,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2024-11-09 05:18:06,429 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2024-11-09 05:18:06,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:18:06,430 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2024-11-09 05:18:06,432 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 05:18:06,432 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2024-11-09 05:18:06,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 05:18:06,433 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:18:06,433 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:18:06,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:18:06,434 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:18:06,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:18:06,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1476456328, now seen corresponding path program 1 times [2024-11-09 05:18:06,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:18:06,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725524728] [2024-11-09 05:18:06,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:18:06,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:18:06,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:18:06,597 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 05:18:06,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:18:06,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725524728] [2024-11-09 05:18:06,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725524728] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:18:06,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500155460] [2024-11-09 05:18:06,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:18:06,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:18:06,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:18:06,602 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:18:06,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:18:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:18:06,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:18:06,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:18:06,764 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 05:18:06,765 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:18:06,831 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 05:18:06,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500155460] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:18:06,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1524651870] [2024-11-09 05:18:06,857 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:18:06,858 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:18:06,863 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:18:06,870 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:18:06,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:18:07,455 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:18:07,670 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '117#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~x~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-09 05:18:07,672 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:18:07,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:18:07,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-09 05:18:07,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839458002] [2024-11-09 05:18:07,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:18:07,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:18:07,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:18:07,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:18:07,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:18:07,678 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 05:18:07,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:18:07,724 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2024-11-09 05:18:07,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:18:07,725 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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) Word has length 9 [2024-11-09 05:18:07,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:18:07,726 INFO L225 Difference]: With dead ends: 24 [2024-11-09 05:18:07,727 INFO L226 Difference]: Without dead ends: 17 [2024-11-09 05:18:07,727 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:18:07,729 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:18:07,730 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 29 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:18:07,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-09 05:18:07,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-09 05:18:07,734 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 05:18:07,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2024-11-09 05:18:07,735 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2024-11-09 05:18:07,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:18:07,735 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2024-11-09 05:18:07,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 05:18:07,736 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2024-11-09 05:18:07,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 05:18:07,736 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:18:07,737 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:18:07,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 05:18:07,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:18:07,941 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:18:07,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:18:07,942 INFO L85 PathProgramCache]: Analyzing trace with hash -48321401, now seen corresponding path program 2 times [2024-11-09 05:18:07,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:18:07,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492587639] [2024-11-09 05:18:07,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:18:07,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:18:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:18:08,256 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 05:18:08,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:18:08,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492587639] [2024-11-09 05:18:08,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492587639] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:18:08,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726852934] [2024-11-09 05:18:08,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:18:08,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:18:08,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:18:08,262 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:18:08,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:18:08,362 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 05:18:08,363 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:18:08,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 05:18:08,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:18:08,405 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 05:18:08,406 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:18:08,521 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 05:18:08,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726852934] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:18:08,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1586390801] [2024-11-09 05:18:08,524 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:18:08,525 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:18:08,526 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:18:08,526 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:18:08,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:18:08,767 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:18:08,938 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '274#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~x~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-09 05:18:08,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:18:08,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:18:08,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-09 05:18:08,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797778882] [2024-11-09 05:18:08,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:18:08,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 05:18:08,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:18:08,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 05:18:08,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2024-11-09 05:18:08,944 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:18:09,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:18:09,020 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2024-11-09 05:18:09,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 05:18:09,021 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 05:18:09,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:18:09,022 INFO L225 Difference]: With dead ends: 36 [2024-11-09 05:18:09,022 INFO L226 Difference]: Without dead ends: 29 [2024-11-09 05:18:09,022 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2024-11-09 05:18:09,025 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:18:09,026 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 36 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:18:09,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-09 05:18:09,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-09 05:18:09,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:18:09,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2024-11-09 05:18:09,038 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 15 [2024-11-09 05:18:09,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:18:09,039 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2024-11-09 05:18:09,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:18:09,040 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2024-11-09 05:18:09,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 05:18:09,041 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:18:09,042 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:18:09,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:18:09,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:18:09,246 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:18:09,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:18:09,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1797669147, now seen corresponding path program 3 times [2024-11-09 05:18:09,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:18:09,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200682540] [2024-11-09 05:18:09,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:18:09,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:18:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:18:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:18:09,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:18:09,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200682540] [2024-11-09 05:18:09,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200682540] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:18:09,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718510672] [2024-11-09 05:18:09,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:18:09,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:18:09,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:18:09,602 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:18:09,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:18:09,683 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:18:09,683 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:18:09,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 05:18:09,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:18:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:18:09,748 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:18:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:18:10,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718510672] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:18:10,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [360819096] [2024-11-09 05:18:10,097 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:18:10,099 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:18:10,100 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:18:10,100 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:18:10,100 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:18:10,292 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:18:10,480 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '551#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~x~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-09 05:18:10,480 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:18:10,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:18:10,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-11-09 05:18:10,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764915349] [2024-11-09 05:18:10,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:18:10,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 05:18:10,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:18:10,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 05:18:10,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=609, Unknown=0, NotChecked=0, Total=930 [2024-11-09 05:18:10,485 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:18:10,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:18:10,618 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2024-11-09 05:18:10,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 05:18:10,619 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 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 27 [2024-11-09 05:18:10,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:18:10,621 INFO L225 Difference]: With dead ends: 60 [2024-11-09 05:18:10,621 INFO L226 Difference]: Without dead ends: 53 [2024-11-09 05:18:10,622 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=321, Invalid=609, Unknown=0, NotChecked=0, Total=930 [2024-11-09 05:18:10,623 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:18:10,624 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 43 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:18:10,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-09 05:18:10,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-09 05:18:10,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 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 05:18:10,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2024-11-09 05:18:10,635 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2024-11-09 05:18:10,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:18:10,635 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2024-11-09 05:18:10,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:18:10,636 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2024-11-09 05:18:10,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 05:18:10,638 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:18:10,638 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:18:10,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:18:10,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:18:10,840 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:18:10,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:18:10,842 INFO L85 PathProgramCache]: Analyzing trace with hash -58225503, now seen corresponding path program 4 times [2024-11-09 05:18:10,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:18:10,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458448175] [2024-11-09 05:18:10,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:18:10,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:18:10,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:18:11,980 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:18:11,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:18:11,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458448175] [2024-11-09 05:18:11,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458448175] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:18:11,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643339642] [2024-11-09 05:18:11,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:18:11,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:18:11,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:18:11,985 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:18:11,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:18:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:18:12,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 05:18:12,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:18:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:18:12,261 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:18:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:18:13,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643339642] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:18:13,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1354453181] [2024-11-09 05:18:13,685 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:18:13,685 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:18:13,686 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:18:13,686 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:18:13,686 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:18:13,831 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:18:14,123 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1068#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~x~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-09 05:18:14,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:18:14,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:18:14,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2024-11-09 05:18:14,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680453770] [2024-11-09 05:18:14,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:18:14,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-09 05:18:14,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:18:14,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-09 05:18:14,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1197, Invalid=1773, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 05:18:14,130 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:18:14,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:18:14,402 INFO L93 Difference]: Finished difference Result 108 states and 133 transitions. [2024-11-09 05:18:14,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-09 05:18:14,403 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-11-09 05:18:14,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:18:14,405 INFO L225 Difference]: With dead ends: 108 [2024-11-09 05:18:14,405 INFO L226 Difference]: Without dead ends: 101 [2024-11-09 05:18:14,406 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1197, Invalid=1773, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 05:18:14,407 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:18:14,408 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 29 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:18:14,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-09 05:18:14,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2024-11-09 05:18:14,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:18:14,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2024-11-09 05:18:14,422 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 51 [2024-11-09 05:18:14,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:18:14,423 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2024-11-09 05:18:14,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:18:14,424 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2024-11-09 05:18:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-09 05:18:14,427 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:18:14,427 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:18:14,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:18:14,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:18:14,628 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:18:14,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:18:14,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2124166119, now seen corresponding path program 5 times [2024-11-09 05:18:14,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:18:14,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543690761] [2024-11-09 05:18:14,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:18:14,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:18:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:18:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:18:17,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:18:17,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543690761] [2024-11-09 05:18:17,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543690761] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:18:17,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402081285] [2024-11-09 05:18:17,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:18:17,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:18:17,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:18:17,721 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:18:17,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:19:10,514 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2024-11-09 05:19:10,514 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:19:10,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 05:19:10,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:19:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:19:10,765 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:19:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:19:14,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402081285] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:19:14,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1219506900] [2024-11-09 05:19:14,790 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:19:14,791 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:19:14,791 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:19:14,791 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:19:14,792 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:19:14,930 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:19:15,289 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2065#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~x~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-09 05:19:15,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:19:15,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:19:15,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2024-11-09 05:19:15,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541548032] [2024-11-09 05:19:15,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:19:15,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-09 05:19:15,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:19:15,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-09 05:19:15,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4677, Invalid=5829, Unknown=0, NotChecked=0, Total=10506 [2024-11-09 05:19:15,303 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 97 states, 97 states have (on average 2.020618556701031) internal successors, (196), 96 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:19:15,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:19:15,906 INFO L93 Difference]: Finished difference Result 204 states and 253 transitions. [2024-11-09 05:19:15,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-09 05:19:15,909 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.020618556701031) internal successors, (196), 96 states have internal predecessors, (196), 0 states have call successors, (0), 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 99 [2024-11-09 05:19:15,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:19:15,911 INFO L225 Difference]: With dead ends: 204 [2024-11-09 05:19:15,915 INFO L226 Difference]: Without dead ends: 197 [2024-11-09 05:19:15,921 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=4677, Invalid=5829, Unknown=0, NotChecked=0, Total=10506 [2024-11-09 05:19:15,922 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:19:15,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 57 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:19:15,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-09 05:19:15,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2024-11-09 05:19:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:19:15,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2024-11-09 05:19:15,946 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 99 [2024-11-09 05:19:15,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:19:15,947 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2024-11-09 05:19:15,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.020618556701031) internal successors, (196), 96 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:19:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2024-11-09 05:19:15,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2024-11-09 05:19:15,952 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:19:15,952 INFO L215 NwaCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:19:15,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 05:19:16,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 05:19:16,153 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:19:16,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:19:16,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1406215415, now seen corresponding path program 6 times [2024-11-09 05:19:16,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:19:16,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283140890] [2024-11-09 05:19:16,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:19:16,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:19:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:19:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:19:24,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:19:24,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283140890] [2024-11-09 05:19:24,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283140890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:19:24,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840064835] [2024-11-09 05:19:24,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:19:24,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:19:24,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:19:24,325 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:19:24,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:19:24,602 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:19:24,602 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:19:24,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-09 05:19:24,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:19:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:19:25,027 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:19:37,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:19:37,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840064835] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:19:37,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1373306035] [2024-11-09 05:19:37,643 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:19:37,643 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:19:37,643 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:19:37,644 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:19:37,644 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:19:37,778 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:19:38,266 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4022#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~x~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-09 05:19:38,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:19:38,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:19:38,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2024-11-09 05:19:38,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044111510] [2024-11-09 05:19:38,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:19:38,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2024-11-09 05:19:38,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:19:38,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2024-11-09 05:19:38,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18549, Invalid=20853, Unknown=0, NotChecked=0, Total=39402 [2024-11-09 05:19:38,295 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 193 states, 193 states have (on average 2.010362694300518) internal successors, (388), 192 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:19:39,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:19:39,520 INFO L93 Difference]: Finished difference Result 396 states and 493 transitions. [2024-11-09 05:19:39,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2024-11-09 05:19:39,522 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.010362694300518) internal successors, (388), 192 states have internal predecessors, (388), 0 states have call successors, (0), 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 195 [2024-11-09 05:19:39,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:19:39,527 INFO L225 Difference]: With dead ends: 396 [2024-11-09 05:19:39,528 INFO L226 Difference]: Without dead ends: 389 [2024-11-09 05:19:39,532 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2092 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=18549, Invalid=20853, Unknown=0, NotChecked=0, Total=39402 [2024-11-09 05:19:39,533 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:19:39,534 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 36 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:19:39,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2024-11-09 05:19:39,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2024-11-09 05:19:39,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.0051546391752577) internal successors, (390), 388 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:19:39,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 390 transitions. [2024-11-09 05:19:39,565 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 390 transitions. Word has length 195 [2024-11-09 05:19:39,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:19:39,565 INFO L471 AbstractCegarLoop]: Abstraction has 389 states and 390 transitions. [2024-11-09 05:19:39,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.010362694300518) internal successors, (388), 192 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:19:39,566 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 390 transitions. [2024-11-09 05:19:39,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2024-11-09 05:19:39,575 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:19:39,575 INFO L215 NwaCegarLoop]: trace histogram [190, 190, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:19:39,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 05:19:39,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 05:19:39,776 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:19:39,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:19:39,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1049573609, now seen corresponding path program 7 times [2024-11-09 05:19:39,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:19:39,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565996405] [2024-11-09 05:19:39,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:19:39,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:19:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:20:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:20:09,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:20:09,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565996405] [2024-11-09 05:20:09,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565996405] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:20:09,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931937440] [2024-11-09 05:20:09,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:20:09,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:20:09,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:20:09,076 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:20:09,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:20:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:20:09,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 1571 conjuncts, 192 conjuncts are in the unsatisfiable core [2024-11-09 05:20:09,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:20:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:20:10,342 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:21:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:21:01,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931937440] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:21:01,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1673024529] [2024-11-09 05:21:01,029 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:21:01,029 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:21:01,029 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:21:01,030 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:21:01,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:21:01,137 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:21:01,948 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7899#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~x~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-09 05:21:01,948 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:21:01,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:21:01,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2024-11-09 05:21:01,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301769986] [2024-11-09 05:21:01,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:21:01,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2024-11-09 05:21:01,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:21:01,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2024-11-09 05:21:01,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73941, Invalid=78549, Unknown=0, NotChecked=0, Total=152490 [2024-11-09 05:21:01,986 INFO L87 Difference]: Start difference. First operand 389 states and 390 transitions. Second operand has 385 states, 385 states have (on average 2.005194805194805) internal successors, (772), 384 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:21:07,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:21:07,273 INFO L93 Difference]: Finished difference Result 780 states and 973 transitions. [2024-11-09 05:21:07,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2024-11-09 05:21:07,275 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 2.005194805194805) internal successors, (772), 384 states have internal predecessors, (772), 0 states have call successors, (0), 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 387 [2024-11-09 05:21:07,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:21:07,280 INFO L225 Difference]: With dead ends: 780 [2024-11-09 05:21:07,281 INFO L226 Difference]: Without dead ends: 773 [2024-11-09 05:21:07,290 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1351 GetRequests, 962 SyntacticMatches, 0 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4204 ImplicationChecksByTransitivity, 69.0s TimeCoverageRelationStatistics Valid=73941, Invalid=78549, Unknown=0, NotChecked=0, Total=152490 [2024-11-09 05:21:07,291 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:21:07,291 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 71 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 05:21:07,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2024-11-09 05:21:07,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 773. [2024-11-09 05:21:07,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 1.0025906735751295) internal successors, (774), 772 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:21:07,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 774 transitions. [2024-11-09 05:21:07,367 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 774 transitions. Word has length 387 [2024-11-09 05:21:07,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:21:07,369 INFO L471 AbstractCegarLoop]: Abstraction has 773 states and 774 transitions. [2024-11-09 05:21:07,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 2.005194805194805) internal successors, (772), 384 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:21:07,370 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 774 transitions. [2024-11-09 05:21:07,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2024-11-09 05:21:07,396 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:21:07,397 INFO L215 NwaCegarLoop]: trace histogram [382, 382, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:21:07,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 05:21:07,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:21:07,598 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:21:07,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:21:07,598 INFO L85 PathProgramCache]: Analyzing trace with hash 444134569, now seen corresponding path program 8 times [2024-11-09 05:21:07,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:21:07,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502241113] [2024-11-09 05:21:07,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:21:07,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:21:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:23:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:23:18,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:23:18,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502241113] [2024-11-09 05:23:18,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502241113] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:23:18,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537521713] [2024-11-09 05:23:18,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:23:18,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:23:18,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:23:18,237 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:23:18,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_544641b9-a955-464f-a3fa-f73a0573f43f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process