./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/init-4-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/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_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/init-4-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/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_e851405a-4f60-4488-9180-9442bde1453c/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 7e1c46a3eec085decec4254bf9381483b25ba7b6541d5728ae52d1793b9b8c91 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:17:40,137 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:17:40,236 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:17:40,242 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:17:40,245 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:17:40,282 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:17:40,285 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:17:40,286 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:17:40,287 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:17:40,288 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:17:40,288 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:17:40,289 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:17:40,289 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:17:40,290 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:17:40,292 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:17:40,293 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:17:40,293 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:17:40,293 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:17:40,294 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:17:40,294 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:17:40,294 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:17:40,299 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:17:40,300 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:17:40,300 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:17:40,300 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:17:40,301 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:17:40,301 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:17:40,301 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:17:40,301 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:17:40,302 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:17:40,302 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:17:40,302 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:17:40,302 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:17:40,305 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:17:40,306 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:17:40,306 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:17:40,306 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:17:40,306 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:17:40,307 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:17:40,307 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:17:40,307 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:17:40,309 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:17:40,309 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:17:40,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:17:40,311 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:17:40,311 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:17:40,311 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:17:40,311 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_e851405a-4f60-4488-9180-9442bde1453c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e1c46a3eec085decec4254bf9381483b25ba7b6541d5728ae52d1793b9b8c91 [2024-11-09 05:17:40,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:17:40,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:17:40,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:17:40,683 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:17:40,684 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:17:40,685 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-multidimensional/init-4-n-u.c Unable to find full path for "g++" [2024-11-09 05:17:42,823 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:17:43,023 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:17:43,025 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/sv-benchmarks/c/array-multidimensional/init-4-n-u.c [2024-11-09 05:17:43,034 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/data/6b89e58b8/d5c6242ad27c4d6e8c5d893e4543435c/FLAG87b684f0d [2024-11-09 05:17:43,054 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/data/6b89e58b8/d5c6242ad27c4d6e8c5d893e4543435c [2024-11-09 05:17:43,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:17:43,057 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:17:43,059 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:17:43,059 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:17:43,066 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:17:43,067 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:17:43" (1/1) ... [2024-11-09 05:17:43,068 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f1991a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:17:43, skipping insertion in model container [2024-11-09 05:17:43,069 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:17:43" (1/1) ... [2024-11-09 05:17:43,093 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:17:43,307 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_e851405a-4f60-4488-9180-9442bde1453c/sv-benchmarks/c/array-multidimensional/init-4-n-u.c[322,335] [2024-11-09 05:17:43,337 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:17:43,346 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:17:43,359 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_e851405a-4f60-4488-9180-9442bde1453c/sv-benchmarks/c/array-multidimensional/init-4-n-u.c[322,335] [2024-11-09 05:17:43,384 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:17:43,405 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:17:43,405 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:17:43 WrapperNode [2024-11-09 05:17:43,405 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:17:43,406 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:17:43,406 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:17:43,407 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:17:43,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:17:43" (1/1) ... [2024-11-09 05:17:43,423 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:17:43" (1/1) ... [2024-11-09 05:17:43,447 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2024-11-09 05:17:43,447 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:17:43,448 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:17:43,448 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:17:43,449 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:17:43,460 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:17:43" (1/1) ... [2024-11-09 05:17:43,460 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:17:43" (1/1) ... [2024-11-09 05:17:43,462 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:17:43" (1/1) ... [2024-11-09 05:17:43,463 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:17:43" (1/1) ... [2024-11-09 05:17:43,469 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:17:43" (1/1) ... [2024-11-09 05:17:43,474 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:17:43" (1/1) ... [2024-11-09 05:17:43,476 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:17:43" (1/1) ... [2024-11-09 05:17:43,477 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:17:43" (1/1) ... [2024-11-09 05:17:43,479 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:17:43,480 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:17:43,481 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:17:43,481 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:17:43,482 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:17:43" (1/1) ... [2024-11-09 05:17:43,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:17:43,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:17:43,524 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:17:43,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:17:43,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:17:43,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:17:43,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 05:17:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 05:17:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:17:43,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:17:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 05:17:43,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 05:17:43,676 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:17:43,679 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:17:44,025 INFO L? ?]: Removed 36 outVars from TransFormulas that were not future-live. [2024-11-09 05:17:44,025 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:17:44,088 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:17:44,088 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 05:17:44,089 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:17:44 BoogieIcfgContainer [2024-11-09 05:17:44,089 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:17:44,093 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:17:44,094 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:17:44,099 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:17:44,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:17:43" (1/3) ... [2024-11-09 05:17:44,101 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577b20f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:17:44, skipping insertion in model container [2024-11-09 05:17:44,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:17:43" (2/3) ... [2024-11-09 05:17:44,103 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577b20f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:17:44, skipping insertion in model container [2024-11-09 05:17:44,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:17:44" (3/3) ... [2024-11-09 05:17:44,105 INFO L112 eAbstractionObserver]: Analyzing ICFG init-4-n-u.c [2024-11-09 05:17:44,130 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:17:44,130 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:17:44,199 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:17:44,207 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;@13b218bb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:17:44,208 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:17:44,213 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:44,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 05:17:44,222 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:17:44,223 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:17:44,224 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:17:44,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:17:44,231 INFO L85 PathProgramCache]: Analyzing trace with hash -543338350, now seen corresponding path program 1 times [2024-11-09 05:17:44,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:17:44,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292982940] [2024-11-09 05:17:44,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:17:44,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:17:44,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:17:44,633 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 05:17:44,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:17:44,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292982940] [2024-11-09 05:17:44,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292982940] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:17:44,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:17:44,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:17:44,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644905800] [2024-11-09 05:17:44,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:17:44,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:17:44,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:17:44,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:17:44,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:17:44,677 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:44,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:17:44,761 INFO L93 Difference]: Finished difference Result 59 states and 91 transitions. [2024-11-09 05:17:44,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:17:44,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 05:17:44,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:17:44,774 INFO L225 Difference]: With dead ends: 59 [2024-11-09 05:17:44,774 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 05:17:44,778 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 05:17:44,782 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 16 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:17:44,783 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 69 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:17:44,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 05:17:44,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2024-11-09 05:17:44,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:44,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 44 transitions. [2024-11-09 05:17:44,824 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 44 transitions. Word has length 13 [2024-11-09 05:17:44,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:17:44,824 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 44 transitions. [2024-11-09 05:17:44,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:44,825 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 44 transitions. [2024-11-09 05:17:44,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 05:17:44,826 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:17:44,827 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:17:44,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:17:44,827 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:17:44,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:17:44,829 INFO L85 PathProgramCache]: Analyzing trace with hash 51865, now seen corresponding path program 1 times [2024-11-09 05:17:44,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:17:44,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465547129] [2024-11-09 05:17:44,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:17:44,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:17:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:17:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:17:45,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:17:45,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465547129] [2024-11-09 05:17:45,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465547129] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:17:45,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:17:45,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:17:45,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288408681] [2024-11-09 05:17:45,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:17:45,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:17:45,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:17:45,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:17:45,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:17:45,097 INFO L87 Difference]: Start difference. First operand 30 states and 44 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:45,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:17:45,225 INFO L93 Difference]: Finished difference Result 77 states and 117 transitions. [2024-11-09 05:17:45,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:17:45,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-09 05:17:45,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:17:45,228 INFO L225 Difference]: With dead ends: 77 [2024-11-09 05:17:45,228 INFO L226 Difference]: Without dead ends: 50 [2024-11-09 05:17:45,229 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:17:45,231 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 93 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:17:45,232 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 56 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:17:45,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-09 05:17:45,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 34. [2024-11-09 05:17:45,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:45,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2024-11-09 05:17:45,243 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 17 [2024-11-09 05:17:45,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:17:45,243 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2024-11-09 05:17:45,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:45,244 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2024-11-09 05:17:45,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 05:17:45,245 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:17:45,245 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:17:45,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 05:17:45,246 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:17:45,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:17:45,247 INFO L85 PathProgramCache]: Analyzing trace with hash -395692800, now seen corresponding path program 1 times [2024-11-09 05:17:45,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:17:45,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751419257] [2024-11-09 05:17:45,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:17:45,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:17:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:17:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:17:45,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:17:45,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751419257] [2024-11-09 05:17:45,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751419257] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:17:45,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:17:45,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:17:45,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677646058] [2024-11-09 05:17:45,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:17:45,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:17:45,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:17:45,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:17:45,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:17:45,403 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:45,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:17:45,486 INFO L93 Difference]: Finished difference Result 79 states and 115 transitions. [2024-11-09 05:17:45,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:17:45,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-09 05:17:45,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:17:45,488 INFO L225 Difference]: With dead ends: 79 [2024-11-09 05:17:45,488 INFO L226 Difference]: Without dead ends: 48 [2024-11-09 05:17:45,489 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:17:45,491 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 71 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:17:45,492 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 56 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:17:45,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-09 05:17:45,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2024-11-09 05:17:45,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 37 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 05:17:45,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 52 transitions. [2024-11-09 05:17:45,504 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 52 transitions. Word has length 21 [2024-11-09 05:17:45,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:17:45,504 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 52 transitions. [2024-11-09 05:17:45,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 52 transitions. [2024-11-09 05:17:45,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 05:17:45,506 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:17:45,506 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:17:45,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 05:17:45,507 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:17:45,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:17:45,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1348665401, now seen corresponding path program 1 times [2024-11-09 05:17:45,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:17:45,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286940138] [2024-11-09 05:17:45,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:17:45,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:17:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:17:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:17:45,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:17:45,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286940138] [2024-11-09 05:17:45,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286940138] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:17:45,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:17:45,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:17:45,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960543512] [2024-11-09 05:17:45,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:17:45,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:17:45,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:17:45,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:17:45,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:17:45,682 INFO L87 Difference]: Start difference. First operand 38 states and 52 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:45,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:17:45,765 INFO L93 Difference]: Finished difference Result 81 states and 113 transitions. [2024-11-09 05:17:45,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:17:45,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-09 05:17:45,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:17:45,767 INFO L225 Difference]: With dead ends: 81 [2024-11-09 05:17:45,767 INFO L226 Difference]: Without dead ends: 46 [2024-11-09 05:17:45,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:17:45,770 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 49 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:17:45,771 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 62 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:17:45,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-09 05:17:45,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2024-11-09 05:17:45,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:45,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 56 transitions. [2024-11-09 05:17:45,783 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 56 transitions. Word has length 25 [2024-11-09 05:17:45,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:17:45,784 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 56 transitions. [2024-11-09 05:17:45,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:45,784 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 56 transitions. [2024-11-09 05:17:45,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 05:17:45,785 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:17:45,785 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:17:45,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 05:17:45,786 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:17:45,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:17:45,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1644992108, now seen corresponding path program 1 times [2024-11-09 05:17:45,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:17:45,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906485902] [2024-11-09 05:17:45,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:17:45,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:17:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:17:45,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:17:45,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:17:45,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906485902] [2024-11-09 05:17:45,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906485902] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:17:45,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108855468] [2024-11-09 05:17:45,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:17:45,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:17:45,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:17:45,971 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:17:45,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:17:46,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:17:46,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:17:46,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:17:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:17:46,213 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:17:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:17:46,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108855468] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:17:46,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [404364353] [2024-11-09 05:17:46,322 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:17:46,322 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:17:46,327 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:17:46,334 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:17:46,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:17:48,667 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:17:49,238 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '795#(and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start_main_~l~0#1| 0) (<= 1 |ULTIMATE.start_main_~m~0#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) |ULTIMATE.start_main_~C~0#1|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 05:17:49,239 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:17:49,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:17:49,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-09 05:17:49,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392795284] [2024-11-09 05:17:49,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:17:49,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 05:17:49,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:17:49,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 05:17:49,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2024-11-09 05:17:49,243 INFO L87 Difference]: Start difference. First operand 42 states and 56 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:49,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:17:49,390 INFO L93 Difference]: Finished difference Result 103 states and 141 transitions. [2024-11-09 05:17:49,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:17:49,391 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 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 05:17:49,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:17:49,392 INFO L225 Difference]: With dead ends: 103 [2024-11-09 05:17:49,392 INFO L226 Difference]: Without dead ends: 64 [2024-11-09 05:17:49,393 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2024-11-09 05:17:49,394 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 72 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:17:49,395 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 152 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:17:49,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-09 05:17:49,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2024-11-09 05:17:49,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.280701754385965) internal successors, (73), 57 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:49,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2024-11-09 05:17:49,406 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 27 [2024-11-09 05:17:49,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:17:49,407 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2024-11-09 05:17:49,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:49,407 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2024-11-09 05:17:49,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 05:17:49,408 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:17:49,409 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:17:49,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 05:17:49,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:17:49,614 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:17:49,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:17:49,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1191582427, now seen corresponding path program 2 times [2024-11-09 05:17:49,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:17:49,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636310365] [2024-11-09 05:17:49,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:17:49,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:17:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:17:49,883 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:17:49,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:17:49,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636310365] [2024-11-09 05:17:49,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636310365] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:17:49,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238346852] [2024-11-09 05:17:49,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:17:49,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:17:49,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:17:49,887 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:17:49,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:17:49,977 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 05:17:49,978 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:17:49,979 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:17:49,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:17:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 05:17:50,138 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:17:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 05:17:50,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238346852] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:17:50,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1942376029] [2024-11-09 05:17:50,234 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:17:50,235 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:17:50,235 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:17:50,236 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:17:50,236 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:17:51,791 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:17:52,421 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1237#(and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start_main_~l~0#1| 0) (<= 1 |ULTIMATE.start_main_~m~0#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) |ULTIMATE.start_main_~C~0#1|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 05:17:52,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:17:52,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:17:52,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 3] total 11 [2024-11-09 05:17:52,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788224084] [2024-11-09 05:17:52,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:17:52,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 05:17:52,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:17:52,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 05:17:52,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2024-11-09 05:17:52,424 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:53,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:17:53,128 INFO L93 Difference]: Finished difference Result 207 states and 259 transitions. [2024-11-09 05:17:53,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 05:17:53,129 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-09 05:17:53,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:17:53,130 INFO L225 Difference]: With dead ends: 207 [2024-11-09 05:17:53,130 INFO L226 Difference]: Without dead ends: 152 [2024-11-09 05:17:53,132 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=543, Invalid=2109, Unknown=0, NotChecked=0, Total=2652 [2024-11-09 05:17:53,132 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 281 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:17:53,133 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 152 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:17:53,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-09 05:17:53,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 135. [2024-11-09 05:17:53,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.2313432835820894) internal successors, (165), 134 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:53,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 165 transitions. [2024-11-09 05:17:53,154 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 165 transitions. Word has length 33 [2024-11-09 05:17:53,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:17:53,155 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 165 transitions. [2024-11-09 05:17:53,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:53,155 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 165 transitions. [2024-11-09 05:17:53,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-09 05:17:53,157 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:17:53,157 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:17:53,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:17:53,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 05:17:53,359 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:17:53,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:17:53,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1453729462, now seen corresponding path program 3 times [2024-11-09 05:17:53,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:17:53,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209160766] [2024-11-09 05:17:53,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:17:53,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:17:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:17:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 210 proven. 25 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2024-11-09 05:17:53,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:17:53,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209160766] [2024-11-09 05:17:53,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209160766] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:17:53,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785022446] [2024-11-09 05:17:53,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:17:53,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:17:53,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:17:53,709 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:17:53,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:17:55,138 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:17:55,138 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:17:55,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:17:55,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:17:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 226 proven. 1 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2024-11-09 05:17:55,296 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:17:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 226 proven. 1 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2024-11-09 05:17:55,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785022446] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:17:55,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [258183378] [2024-11-09 05:17:55,403 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:17:55,404 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:17:55,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:17:55,404 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:17:55,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:17:56,819 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:17:57,500 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2390#(and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start_main_~l~0#1| 0) (<= 1 |ULTIMATE.start_main_~m~0#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) |ULTIMATE.start_main_~C~0#1|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 05:17:57,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:17:57,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:17:57,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 14 [2024-11-09 05:17:57,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14490574] [2024-11-09 05:17:57,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:17:57,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 05:17:57,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:17:57,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 05:17:57,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2024-11-09 05:17:57,505 INFO L87 Difference]: Start difference. First operand 135 states and 165 transitions. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:58,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:17:58,659 INFO L93 Difference]: Finished difference Result 705 states and 851 transitions. [2024-11-09 05:17:58,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 05:17:58,660 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2024-11-09 05:17:58,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:17:58,663 INFO L225 Difference]: With dead ends: 705 [2024-11-09 05:17:58,664 INFO L226 Difference]: Without dead ends: 575 [2024-11-09 05:17:58,667 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=770, Invalid=2890, Unknown=0, NotChecked=0, Total=3660 [2024-11-09 05:17:58,668 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 1292 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:17:58,669 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1292 Valid, 106 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:17:58,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2024-11-09 05:17:58,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 493. [2024-11-09 05:17:58,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 1.1829268292682926) internal successors, (582), 492 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:58,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 582 transitions. [2024-11-09 05:17:58,775 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 582 transitions. Word has length 101 [2024-11-09 05:17:58,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:17:58,775 INFO L471 AbstractCegarLoop]: Abstraction has 493 states and 582 transitions. [2024-11-09 05:17:58,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:17:58,776 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 582 transitions. [2024-11-09 05:17:58,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2024-11-09 05:17:58,789 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:17:58,789 INFO L215 NwaCegarLoop]: trace histogram [96, 96, 16, 16, 16, 16, 16, 16, 16, 16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:17:58,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:17:58,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 05:17:58,991 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:17:58,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:17:58,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2110294930, now seen corresponding path program 4 times [2024-11-09 05:17:58,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:17:58,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323019562] [2024-11-09 05:17:58,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:17:58,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:17:59,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:18:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11964 backedges. 1362 proven. 36 refuted. 0 times theorem prover too weak. 10566 trivial. 0 not checked. [2024-11-09 05:18:00,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:18:00,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323019562] [2024-11-09 05:18:00,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323019562] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:18:00,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492708541] [2024-11-09 05:18:00,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:18:00,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:18:00,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:18:00,326 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:18:00,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:18:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:18:00,725 INFO L255 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:18:00,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:18:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11964 backedges. 1362 proven. 36 refuted. 0 times theorem prover too weak. 10566 trivial. 0 not checked. [2024-11-09 05:18:00,932 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:18:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11964 backedges. 1362 proven. 36 refuted. 0 times theorem prover too weak. 10566 trivial. 0 not checked. [2024-11-09 05:18:01,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492708541] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:18:01,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1201175246] [2024-11-09 05:18:01,128 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:18:01,128 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:18:01,129 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:18:01,129 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:18:01,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:18:02,497 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:18:03,038 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6252#(and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start_main_~l~0#1| 0) (<= 1 |ULTIMATE.start_main_~m~0#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) |ULTIMATE.start_main_~C~0#1|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 05:18:03,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:18:03,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:18:03,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-09 05:18:03,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834846769] [2024-11-09 05:18:03,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:18:03,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 05:18:03,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:18:03,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 05:18:03,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1331, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 05:18:03,043 INFO L87 Difference]: Start difference. First operand 493 states and 582 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:18:03,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:18:03,534 INFO L93 Difference]: Finished difference Result 1389 states and 1746 transitions. [2024-11-09 05:18:03,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 05:18:03,535 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 349 [2024-11-09 05:18:03,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:18:03,540 INFO L225 Difference]: With dead ends: 1389 [2024-11-09 05:18:03,541 INFO L226 Difference]: Without dead ends: 903 [2024-11-09 05:18:03,544 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1061 GetRequests, 1014 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=524, Invalid=1828, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 05:18:03,544 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 304 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:18:03,545 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 224 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:18:03,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2024-11-09 05:18:03,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 877. [2024-11-09 05:18:03,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 1.139269406392694) internal successors, (998), 876 states have internal predecessors, (998), 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 05:18:03,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 998 transitions. [2024-11-09 05:18:03,665 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 998 transitions. Word has length 349 [2024-11-09 05:18:03,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:18:03,666 INFO L471 AbstractCegarLoop]: Abstraction has 877 states and 998 transitions. [2024-11-09 05:18:03,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:18:03,666 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 998 transitions. [2024-11-09 05:18:03,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2024-11-09 05:18:03,684 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:18:03,685 INFO L215 NwaCegarLoop]: trace histogram [224, 224, 16, 16, 16, 16, 16, 16, 16, 16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:18:03,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 05:18:03,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-09 05:18:03,885 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:18:03,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:18:03,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1207302418, now seen corresponding path program 5 times [2024-11-09 05:18:03,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:18:03,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201569810] [2024-11-09 05:18:03,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:18:03,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:18:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:18:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 54844 backedges. 6402 proven. 196 refuted. 0 times theorem prover too weak. 48246 trivial. 0 not checked. [2024-11-09 05:18:07,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:18:07,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201569810] [2024-11-09 05:18:07,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201569810] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:18:07,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056288633] [2024-11-09 05:18:07,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:18:07,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:18:07,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:18:07,319 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:18:07,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:18:07,694 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 05:18:07,694 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:18:07,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:18:07,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:18:08,777 INFO L134 CoverageAnalysis]: Checked inductivity of 54844 backedges. 6446 proven. 1 refuted. 0 times theorem prover too weak. 48397 trivial. 0 not checked. [2024-11-09 05:18:08,777 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:18:09,890 INFO L134 CoverageAnalysis]: Checked inductivity of 54844 backedges. 41 proven. 6406 refuted. 0 times theorem prover too weak. 48397 trivial. 0 not checked. [2024-11-09 05:18:09,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056288633] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:18:09,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1906176492] [2024-11-09 05:18:09,898 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:18:09,898 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:18:09,899 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:18:09,899 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:18:09,900 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:18:11,039 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:18:11,656 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13147#(and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start_main_~l~0#1| 0) (<= 1 |ULTIMATE.start_main_~m~0#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) |ULTIMATE.start_main_~C~0#1|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-09 05:18:11,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:18:11,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:18:11,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 4, 4] total 23 [2024-11-09 05:18:11,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493953203] [2024-11-09 05:18:11,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:18:11,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 05:18:11,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:18:11,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 05:18:11,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1343, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 05:18:11,660 INFO L87 Difference]: Start difference. First operand 877 states and 998 transitions. Second operand has 24 states, 24 states have (on average 4.5) internal successors, (108), 23 states have internal predecessors, (108), 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 05:18:15,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:18:15,063 INFO L93 Difference]: Finished difference Result 4413 states and 5032 transitions. [2024-11-09 05:18:15,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-09 05:18:15,064 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.5) internal successors, (108), 23 states have internal predecessors, (108), 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 605 [2024-11-09 05:18:15,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:18:15,081 INFO L225 Difference]: With dead ends: 4413 [2024-11-09 05:18:15,082 INFO L226 Difference]: Without dead ends: 3543 [2024-11-09 05:18:15,087 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1895 GetRequests, 1791 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3375 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2622, Invalid=8508, Unknown=0, NotChecked=0, Total=11130 [2024-11-09 05:18:15,091 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 2492 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2492 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:18:15,092 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2492 Valid, 133 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:18:15,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3543 states. [2024-11-09 05:18:15,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3543 to 3305. [2024-11-09 05:18:15,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3305 states, 3304 states have (on average 1.104721549636804) internal successors, (3650), 3304 states have internal predecessors, (3650), 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 05:18:15,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3305 states to 3305 states and 3650 transitions. [2024-11-09 05:18:15,529 INFO L78 Accepts]: Start accepts. Automaton has 3305 states and 3650 transitions. Word has length 605 [2024-11-09 05:18:15,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:18:15,533 INFO L471 AbstractCegarLoop]: Abstraction has 3305 states and 3650 transitions. [2024-11-09 05:18:15,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.5) internal successors, (108), 23 states have internal predecessors, (108), 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 05:18:15,534 INFO L276 IsEmpty]: Start isEmpty. Operand 3305 states and 3650 transitions. [2024-11-09 05:18:15,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2270 [2024-11-09 05:18:15,656 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:18:15,658 INFO L215 NwaCegarLoop]: trace histogram [960, 960, 64, 64, 64, 64, 16, 16, 16, 16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:18:15,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 05:18:15,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:18:15,859 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:18:15,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:18:15,860 INFO L85 PathProgramCache]: Analyzing trace with hash -964830562, now seen corresponding path program 6 times [2024-11-09 05:18:15,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:18:15,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876229226] [2024-11-09 05:18:15,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:18:15,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:18:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:18:26,758 INFO L134 CoverageAnalysis]: Checked inductivity of 991740 backedges. 30486 proven. 225 refuted. 0 times theorem prover too weak. 961029 trivial. 0 not checked. [2024-11-09 05:18:26,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:18:26,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876229226] [2024-11-09 05:18:26,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876229226] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:18:26,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513482814] [2024-11-09 05:18:26,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:18:26,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:18:26,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:18:26,761 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:18:26,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e851405a-4f60-4488-9180-9442bde1453c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process