./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/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_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/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_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/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 9442e044a28de8db50c4a8a0eb4a8445fbcad0aeea133121bbafc8536c8e355f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:56:04,019 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:56:04,154 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:56:04,165 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:56:04,168 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:56:04,219 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:56:04,222 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:56:04,223 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:56:04,224 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:56:04,225 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:56:04,225 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:56:04,226 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:56:04,226 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:56:04,227 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:56:04,227 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:56:04,228 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:56:04,228 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:56:04,228 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:56:04,229 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:56:04,229 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:56:04,230 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:56:04,230 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:56:04,231 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:56:04,232 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:56:04,232 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:56:04,232 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:56:04,233 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:56:04,233 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:56:04,234 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:56:04,234 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:56:04,234 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:56:04,235 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:56:04,235 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:56:04,236 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:56:04,236 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:56:04,236 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:56:04,237 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:56:04,237 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:56:04,237 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:56:04,238 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:56:04,238 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:56:04,239 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:56:04,239 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:56:04,240 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:56:04,240 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:56:04,240 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:56:04,241 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:56:04,241 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_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9442e044a28de8db50c4a8a0eb4a8445fbcad0aeea133121bbafc8536c8e355f [2024-11-09 05:56:04,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:56:04,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:56:04,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:56:04,665 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:56:04,665 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:56:04,667 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-programs/partial_mod_count_5.c Unable to find full path for "g++" [2024-11-09 05:56:06,844 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:56:07,049 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:56:07,050 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/sv-benchmarks/c/array-programs/partial_mod_count_5.c [2024-11-09 05:56:07,057 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/data/ac13f1e98/d7275f01d18f40e9ba7b31d7336d9331/FLAG22c63c272 [2024-11-09 05:56:07,438 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/data/ac13f1e98/d7275f01d18f40e9ba7b31d7336d9331 [2024-11-09 05:56:07,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:56:07,442 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:56:07,443 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:56:07,443 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:56:07,450 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:56:07,451 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:56:07" (1/1) ... [2024-11-09 05:56:07,452 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@731e35e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:56:07, skipping insertion in model container [2024-11-09 05:56:07,452 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:56:07" (1/1) ... [2024-11-09 05:56:07,474 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:56:07,711 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_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/sv-benchmarks/c/array-programs/partial_mod_count_5.c[323,336] [2024-11-09 05:56:07,730 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:56:07,737 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:56:07,747 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_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/sv-benchmarks/c/array-programs/partial_mod_count_5.c[323,336] [2024-11-09 05:56:07,753 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:56:07,772 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:56:07,773 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:56:07 WrapperNode [2024-11-09 05:56:07,773 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:56:07,775 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:56:07,775 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:56:07,775 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:56:07,783 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:56:07" (1/1) ... [2024-11-09 05:56:07,791 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:56:07" (1/1) ... [2024-11-09 05:56:07,810 INFO L138 Inliner]: procedures = 13, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2024-11-09 05:56:07,811 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:56:07,812 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:56:07,812 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:56:07,812 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:56:07,820 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:56:07" (1/1) ... [2024-11-09 05:56:07,820 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:56:07" (1/1) ... [2024-11-09 05:56:07,822 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:56:07" (1/1) ... [2024-11-09 05:56:07,822 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:56:07" (1/1) ... [2024-11-09 05:56:07,827 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:56:07" (1/1) ... [2024-11-09 05:56:07,831 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:56:07" (1/1) ... [2024-11-09 05:56:07,833 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:56:07" (1/1) ... [2024-11-09 05:56:07,834 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:56:07" (1/1) ... [2024-11-09 05:56:07,836 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:56:07,837 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:56:07,838 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:56:07,838 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:56:07,839 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:56:07" (1/1) ... [2024-11-09 05:56:07,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:56:07,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:56:07,874 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:56:07,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:56:07,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:56:07,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:56:07,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 05:56:07,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 05:56:07,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:56:07,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:56:07,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 05:56:07,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 05:56:07,984 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:56:07,986 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:56:08,143 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-09 05:56:08,144 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:56:08,250 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:56:08,251 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 05:56:08,251 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:56:08 BoogieIcfgContainer [2024-11-09 05:56:08,255 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:56:08,258 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:56:08,258 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:56:08,264 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:56:08,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:56:07" (1/3) ... [2024-11-09 05:56:08,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d5ff05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:56:08, skipping insertion in model container [2024-11-09 05:56:08,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:56:07" (2/3) ... [2024-11-09 05:56:08,266 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d5ff05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:56:08, skipping insertion in model container [2024-11-09 05:56:08,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:56:08" (3/3) ... [2024-11-09 05:56:08,270 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_5.c [2024-11-09 05:56:08,287 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:56:08,288 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:56:08,348 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:56:08,357 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;@757107f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:56:08,357 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:56:08,362 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:56:08,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 05:56:08,369 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:56:08,370 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:56:08,371 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:56:08,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:56:08,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1384647583, now seen corresponding path program 1 times [2024-11-09 05:56:08,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:56:08,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833571129] [2024-11-09 05:56:08,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:08,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:56:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:08,783 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 05:56:08,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:56:08,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833571129] [2024-11-09 05:56:08,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833571129] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:56:08,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:56:08,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:56:08,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120142026] [2024-11-09 05:56:08,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:56:08,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:56:08,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:56:08,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:56:08,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:56:08,824 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:56:08,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:56:08,885 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2024-11-09 05:56:08,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:56:08,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 05:56:08,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:56:08,896 INFO L225 Difference]: With dead ends: 23 [2024-11-09 05:56:08,896 INFO L226 Difference]: Without dead ends: 12 [2024-11-09 05:56:08,898 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 05:56:08,902 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:56:08,903 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:56:08,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-09 05:56:08,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-11-09 05:56:08,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:56:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2024-11-09 05:56:08,939 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2024-11-09 05:56:08,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:56:08,940 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2024-11-09 05:56:08,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:56:08,940 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2024-11-09 05:56:08,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 05:56:08,941 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:56:08,941 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:56:08,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:56:08,942 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:56:08,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:56:08,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1010846951, now seen corresponding path program 1 times [2024-11-09 05:56:08,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:56:08,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652049641] [2024-11-09 05:56:08,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:08,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:56:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:56:09,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:56:09,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652049641] [2024-11-09 05:56:09,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652049641] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:56:09,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726698563] [2024-11-09 05:56:09,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:09,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:56:09,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:56:09,196 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:56:09,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:56:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:09,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:56:09,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:56:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:56:09,413 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:56:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:56:09,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726698563] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:56:09,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [510133826] [2024-11-09 05:56:09,496 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:56:09,497 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:56:09,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:56:09,507 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:56:09,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:56:10,596 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:56:10,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [510133826] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:56:10,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:56:10,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 12 [2024-11-09 05:56:10,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913031103] [2024-11-09 05:56:10,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:56:10,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:56:10,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:56:10,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:56:10,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:56:10,875 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:56:10,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:56:10,961 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2024-11-09 05:56:10,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:56:10,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-09 05:56:10,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:56:10,964 INFO L225 Difference]: With dead ends: 17 [2024-11-09 05:56:10,964 INFO L226 Difference]: Without dead ends: 15 [2024-11-09 05:56:10,964 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:56:10,968 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:56:10,969 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:56:10,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-09 05:56:10,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-09 05:56:10,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 05:56:10,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-11-09 05:56:10,980 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2024-11-09 05:56:10,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:56:10,981 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-11-09 05:56:10,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:56:10,981 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-11-09 05:56:10,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 05:56:10,982 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:56:10,982 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:56:11,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 05:56:11,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:56:11,188 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:56:11,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:56:11,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1326847234, now seen corresponding path program 1 times [2024-11-09 05:56:11,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:56:11,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100540342] [2024-11-09 05:56:11,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:11,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:56:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 05:56:11,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:56:11,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100540342] [2024-11-09 05:56:11,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100540342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:56:11,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276542475] [2024-11-09 05:56:11,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:11,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:56:11,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:56:11,447 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:56:11,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:56:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:11,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:56:11,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:56:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 05:56:11,591 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:56:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 05:56:11,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276542475] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:56:11,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [283511985] [2024-11-09 05:56:11,656 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:56:11,656 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:56:11,657 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:56:11,657 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:56:11,657 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:56:12,508 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:56:13,458 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '163#true' at error location [2024-11-09 05:56:13,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:56:13,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:56:13,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-09 05:56:13,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734845695] [2024-11-09 05:56:13,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:56:13,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 05:56:13,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:56:13,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 05:56:13,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-09 05:56:13,463 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:56:13,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:56:13,540 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2024-11-09 05:56:13,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:56:13,541 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 05:56:13,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:56:13,542 INFO L225 Difference]: With dead ends: 30 [2024-11-09 05:56:13,542 INFO L226 Difference]: Without dead ends: 20 [2024-11-09 05:56:13,543 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-09 05:56:13,545 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:56:13,546 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 15 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:56:13,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-09 05:56:13,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-09 05:56:13,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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 05:56:13,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2024-11-09 05:56:13,553 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2024-11-09 05:56:13,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:56:13,554 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2024-11-09 05:56:13,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:56:13,557 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2024-11-09 05:56:13,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 05:56:13,558 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:56:13,558 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:56:13,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:56:13,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:56:13,759 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:56:13,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:56:13,760 INFO L85 PathProgramCache]: Analyzing trace with hash -661769364, now seen corresponding path program 2 times [2024-11-09 05:56:13,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:56:13,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418722828] [2024-11-09 05:56:13,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:13,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:56:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 05:56:14,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:56:14,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418722828] [2024-11-09 05:56:14,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418722828] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:56:14,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102956242] [2024-11-09 05:56:14,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:56:14,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:56:14,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:56:14,232 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:56:14,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:56:14,331 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 05:56:14,331 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:56:14,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:56:14,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:56:14,716 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:56:14,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 62 [2024-11-09 05:56:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:56:14,900 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:56:15,430 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:56:15,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 111 [2024-11-09 05:56:15,766 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:56:15,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102956242] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:56:15,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1204896257] [2024-11-09 05:56:15,769 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:56:15,770 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:56:15,770 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:56:15,770 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:56:15,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:56:16,272 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:56:17,770 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '316#true' at error location [2024-11-09 05:56:17,771 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:56:17,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:56:17,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2024-11-09 05:56:17,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954380146] [2024-11-09 05:56:17,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:56:17,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 05:56:17,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:56:17,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 05:56:17,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2024-11-09 05:56:17,774 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 05:56:18,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:56:18,601 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2024-11-09 05:56:18,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 05:56:18,602 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 19 [2024-11-09 05:56:18,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:56:18,603 INFO L225 Difference]: With dead ends: 52 [2024-11-09 05:56:18,604 INFO L226 Difference]: Without dead ends: 42 [2024-11-09 05:56:18,604 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=258, Invalid=932, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 05:56:18,606 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 35 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:56:18,606 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 21 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:56:18,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-09 05:56:18,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2024-11-09 05:56:18,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:56:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2024-11-09 05:56:18,617 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 19 [2024-11-09 05:56:18,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:56:18,618 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2024-11-09 05:56:18,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 05:56:18,618 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2024-11-09 05:56:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 05:56:18,619 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:56:18,619 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2024-11-09 05:56:18,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:56:18,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:56:18,827 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:56:18,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:56:18,828 INFO L85 PathProgramCache]: Analyzing trace with hash 704061589, now seen corresponding path program 3 times [2024-11-09 05:56:18,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:56:18,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745521744] [2024-11-09 05:56:18,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:18,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:56:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 05:56:19,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:56:19,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745521744] [2024-11-09 05:56:19,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745521744] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:56:19,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559015757] [2024-11-09 05:56:19,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:56:19,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:56:19,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:56:19,256 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:56:19,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:56:19,361 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:56:19,361 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:56:19,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:56:19,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:56:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 05:56:19,502 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:56:19,638 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 05:56:19,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559015757] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:56:19,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1575893675] [2024-11-09 05:56:19,642 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:56:19,642 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:56:19,642 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:56:19,642 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:56:19,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:56:20,302 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:56:21,157 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '585#true' at error location [2024-11-09 05:56:21,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:56:21,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:56:21,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-09 05:56:21,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806457948] [2024-11-09 05:56:21,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:56:21,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 05:56:21,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:56:21,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 05:56:21,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=498, Unknown=0, NotChecked=0, Total=702 [2024-11-09 05:56:21,162 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:56:21,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:56:21,302 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2024-11-09 05:56:21,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 05:56:21,303 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-09 05:56:21,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:56:21,304 INFO L225 Difference]: With dead ends: 70 [2024-11-09 05:56:21,304 INFO L226 Difference]: Without dead ends: 48 [2024-11-09 05:56:21,305 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=204, Invalid=498, Unknown=0, NotChecked=0, Total=702 [2024-11-09 05:56:21,306 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:56:21,307 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 15 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:56:21,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-09 05:56:21,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-09 05:56:21,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:56:21,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-11-09 05:56:21,319 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 33 [2024-11-09 05:56:21,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:56:21,320 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-11-09 05:56:21,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:56:21,320 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-11-09 05:56:21,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 05:56:21,322 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:56:21,322 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2024-11-09 05:56:21,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:56:21,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:56:21,523 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:56:21,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:56:21,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1380490475, now seen corresponding path program 4 times [2024-11-09 05:56:21,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:56:21,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159933162] [2024-11-09 05:56:21,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:21,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:56:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 05:56:22,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:56:22,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159933162] [2024-11-09 05:56:22,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159933162] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:56:22,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585965662] [2024-11-09 05:56:22,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:56:22,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:56:22,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:56:22,452 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:56:22,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:56:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:22,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 05:56:22,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:56:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 05:56:22,913 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:56:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 05:56:23,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585965662] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:56:23,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [275973884] [2024-11-09 05:56:23,372 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:56:23,372 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:56:23,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:56:23,373 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:56:23,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:56:24,100 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:56:25,019 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '963#true' at error location [2024-11-09 05:56:25,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:56:25,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:56:25,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2024-11-09 05:56:25,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800757351] [2024-11-09 05:56:25,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:56:25,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-09 05:56:25,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:56:25,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-09 05:56:25,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=778, Invalid=1478, Unknown=0, NotChecked=0, Total=2256 [2024-11-09 05:56:25,024 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 40 states have internal predecessors, (85), 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 05:56:25,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:56:25,294 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2024-11-09 05:56:25,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 05:56:25,295 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 40 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-11-09 05:56:25,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:56:25,295 INFO L225 Difference]: With dead ends: 98 [2024-11-09 05:56:25,296 INFO L226 Difference]: Without dead ends: 76 [2024-11-09 05:56:25,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=778, Invalid=1478, Unknown=0, NotChecked=0, Total=2256 [2024-11-09 05:56:25,298 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:56:25,299 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:56:25,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-09 05:56:25,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-09 05:56:25,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 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 05:56:25,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2024-11-09 05:56:25,316 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 47 [2024-11-09 05:56:25,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:56:25,317 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2024-11-09 05:56:25,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 40 states have internal predecessors, (85), 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 05:56:25,317 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2024-11-09 05:56:25,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-09 05:56:25,319 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:56:25,320 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2024-11-09 05:56:25,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 05:56:25,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 05:56:25,521 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:56:25,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:56:25,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1738733033, now seen corresponding path program 5 times [2024-11-09 05:56:25,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:56:25,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187883570] [2024-11-09 05:56:25,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:25,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:56:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 05:56:28,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:56:28,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187883570] [2024-11-09 05:56:28,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187883570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:56:28,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424160882] [2024-11-09 05:56:28,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:56:28,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:56:28,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:56:28,296 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:56:28,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:56:28,645 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 05:56:28,645 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:56:28,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 05:56:28,651 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:56:30,162 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:56:30,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 120 treesize of output 184 [2024-11-09 05:56:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2024-11-09 05:56:30,287 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:56:34,361 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:56:34,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 415 treesize of output 567 [2024-11-09 05:56:41,266 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2024-11-09 05:56:41,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424160882] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:56:41,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [620320632] [2024-11-09 05:56:41,270 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:56:41,270 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:56:41,270 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:56:41,271 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:56:41,271 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:56:41,836 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:56:46,932 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1530#true' at error location [2024-11-09 05:56:46,932 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:56:46,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:56:46,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 9, 9] total 44 [2024-11-09 05:56:46,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157768858] [2024-11-09 05:56:46,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:56:46,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-09 05:56:46,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:56:46,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-09 05:56:46,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=2082, Unknown=0, NotChecked=0, Total=2652 [2024-11-09 05:56:46,936 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:56:52,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:56:52,579 INFO L93 Difference]: Finished difference Result 228 states and 236 transitions. [2024-11-09 05:56:52,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-09 05:56:52,580 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2024-11-09 05:56:52,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:56:52,581 INFO L225 Difference]: With dead ends: 228 [2024-11-09 05:56:52,581 INFO L226 Difference]: Without dead ends: 206 [2024-11-09 05:56:52,584 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2473 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=2963, Invalid=8379, Unknown=0, NotChecked=0, Total=11342 [2024-11-09 05:56:52,587 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 305 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:56:52,588 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 77 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:56:52,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-09 05:56:52,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 102. [2024-11-09 05:56:52,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 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 05:56:52,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2024-11-09 05:56:52,641 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 75 [2024-11-09 05:56:52,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:56:52,643 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2024-11-09 05:56:52,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:56:52,647 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2024-11-09 05:56:52,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-09 05:56:52,653 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:56:52,653 INFO L215 NwaCegarLoop]: trace histogram [27, 27, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2024-11-09 05:56:52,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 05:56:52,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:56:52,854 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:56:52,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:56:52,855 INFO L85 PathProgramCache]: Analyzing trace with hash -681062801, now seen corresponding path program 6 times [2024-11-09 05:56:52,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:56:52,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749588352] [2024-11-09 05:56:52,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:52,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:56:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 05:56:55,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:56:55,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749588352] [2024-11-09 05:56:55,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749588352] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:56:55,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143916817] [2024-11-09 05:56:55,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:56:55,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:56:55,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:56:55,798 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:56:55,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:56:56,017 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:56:56,018 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:56:56,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 05:56:56,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:56:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 05:56:57,040 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:56:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 05:56:58,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143916817] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:56:58,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1812409663] [2024-11-09 05:56:58,551 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:56:58,552 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:56:58,552 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:56:58,552 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:56:58,552 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:56:58,945 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:56:59,929 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2566#true' at error location [2024-11-09 05:56:59,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:56:59,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:56:59,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 85 [2024-11-09 05:56:59,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068951929] [2024-11-09 05:56:59,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:56:59,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-09 05:56:59,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:56:59,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-09 05:56:59,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3328, Invalid=5228, Unknown=0, NotChecked=0, Total=8556 [2024-11-09 05:56:59,937 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 85 states have internal predecessors, (175), 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 05:57:00,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:57:00,470 INFO L93 Difference]: Finished difference Result 206 states and 236 transitions. [2024-11-09 05:57:00,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-09 05:57:00,471 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 85 states have internal predecessors, (175), 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 05:57:00,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:57:00,473 INFO L225 Difference]: With dead ends: 206 [2024-11-09 05:57:00,473 INFO L226 Difference]: Without dead ends: 160 [2024-11-09 05:57:00,476 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4022 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3328, Invalid=5228, Unknown=0, NotChecked=0, Total=8556 [2024-11-09 05:57:00,477 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:57:00,477 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:57:00,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-09 05:57:00,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2024-11-09 05:57:00,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 states have internal predecessors, (161), 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 05:57:00,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2024-11-09 05:57:00,507 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 101 [2024-11-09 05:57:00,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:57:00,508 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2024-11-09 05:57:00,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 85 states have internal predecessors, (175), 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 05:57:00,509 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2024-11-09 05:57:00,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-09 05:57:00,511 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:57:00,512 INFO L215 NwaCegarLoop]: trace histogram [56, 56, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2024-11-09 05:57:00,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 05:57:00,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:57:00,716 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:57:00,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:57:00,717 INFO L85 PathProgramCache]: Analyzing trace with hash -294286143, now seen corresponding path program 7 times [2024-11-09 05:57:00,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:57:00,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534912313] [2024-11-09 05:57:00,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:00,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:57:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3346 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 05:57:08,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:57:08,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534912313] [2024-11-09 05:57:08,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534912313] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:57:08,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119115162] [2024-11-09 05:57:08,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:57:08,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:57:08,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:57:08,312 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:57:08,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:57:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:08,604 INFO L255 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-09 05:57:08,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:57:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3346 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 05:57:10,876 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:57:16,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3346 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 05:57:16,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119115162] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:57:16,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1419003107] [2024-11-09 05:57:16,008 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:57:16,008 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:57:16,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:57:16,009 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:57:16,009 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:57:16,300 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:57:17,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3772#true' at error location [2024-11-09 05:57:17,337 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:57:17,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:57:17,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 172 [2024-11-09 05:57:17,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44234826] [2024-11-09 05:57:17,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:57:17,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2024-11-09 05:57:17,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:57:17,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2024-11-09 05:57:17,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13362, Invalid=18858, Unknown=0, NotChecked=0, Total=32220 [2024-11-09 05:57:17,348 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 173 states, 173 states have (on average 2.0173410404624277) internal successors, (349), 172 states have internal predecessors, (349), 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 05:57:18,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:57:18,294 INFO L93 Difference]: Finished difference Result 322 states and 381 transitions. [2024-11-09 05:57:18,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-11-09 05:57:18,295 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 2.0173410404624277) internal successors, (349), 172 states have internal predecessors, (349), 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 159 [2024-11-09 05:57:18,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:57:18,297 INFO L225 Difference]: With dead ends: 322 [2024-11-09 05:57:18,297 INFO L226 Difference]: Without dead ends: 276 [2024-11-09 05:57:18,300 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14810 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=13362, Invalid=18858, Unknown=0, NotChecked=0, Total=32220 [2024-11-09 05:57:18,301 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:57:18,301 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 36 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:57:18,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2024-11-09 05:57:18,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2024-11-09 05:57:18,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.0072727272727273) internal successors, (277), 275 states have internal predecessors, (277), 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 05:57:18,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 277 transitions. [2024-11-09 05:57:18,341 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 277 transitions. Word has length 159 [2024-11-09 05:57:18,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:57:18,341 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 277 transitions. [2024-11-09 05:57:18,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 2.0173410404624277) internal successors, (349), 172 states have internal predecessors, (349), 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 05:57:18,342 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 277 transitions. [2024-11-09 05:57:18,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2024-11-09 05:57:18,347 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:57:18,347 INFO L215 NwaCegarLoop]: trace histogram [114, 114, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2024-11-09 05:57:18,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 05:57:18,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:57:18,548 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:57:18,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:57:18,548 INFO L85 PathProgramCache]: Analyzing trace with hash 2023320037, now seen corresponding path program 8 times [2024-11-09 05:57:18,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:57:18,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321132481] [2024-11-09 05:57:18,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:18,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:57:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 13206 backedges. 0 proven. 12996 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 05:57:38,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:57:38,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321132481] [2024-11-09 05:57:38,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321132481] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:57:38,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128080755] [2024-11-09 05:57:38,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:57:38,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:57:38,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:57:38,832 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:57:38,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 05:57:41,618 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-09 05:57:41,618 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:57:41,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 05:57:41,630 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:57:47,539 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:57:47,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 210 treesize of output 634 [2024-11-09 05:57:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13206 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 12996 trivial. 0 not checked. [2024-11-09 05:57:49,846 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:58:25,931 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:58:25,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 19 select indices, 19 select index equivalence classes, 0 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 171 case distinctions, treesize of input 1409 treesize of output 2617 [2024-11-09 06:01:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13206 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 12996 trivial. 0 not checked. [2024-11-09 06:01:09,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128080755] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:01:09,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [200447992] [2024-11-09 06:01:09,989 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 06:01:09,989 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:01:09,990 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:01:09,990 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:01:09,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:01:10,272 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:01:14,308 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5761#true' at error location [2024-11-09 06:01:14,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:01:14,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:01:14,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 14, 14] total 142 [2024-11-09 06:01:14,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781370043] [2024-11-09 06:01:14,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:01:14,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2024-11-09 06:01:14,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:01:14,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2024-11-09 06:01:14,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=15208, Unknown=0, NotChecked=0, Total=22350 [2024-11-09 06:01:14,315 INFO L87 Difference]: Start difference. First operand 276 states and 277 transitions. Second operand has 143 states, 143 states have (on average 2.3286713286713288) internal successors, (333), 142 states have internal predecessors, (333), 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 06:02:02,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:02:02,271 INFO L93 Difference]: Finished difference Result 932 states and 946 transitions. [2024-11-09 06:02:02,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2024-11-09 06:02:02,271 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.3286713286713288) internal successors, (333), 142 states have internal predecessors, (333), 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 275 [2024-11-09 06:02:02,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:02:02,275 INFO L225 Difference]: With dead ends: 932 [2024-11-09 06:02:02,275 INFO L226 Difference]: Without dead ends: 886 [2024-11-09 06:02:02,281 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1118 GetRequests, 779 SyntacticMatches, 12 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21973 ImplicationChecksByTransitivity, 71.5s TimeCoverageRelationStatistics Valid=32905, Invalid=75007, Unknown=0, NotChecked=0, Total=107912 [2024-11-09 06:02:02,281 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 2576 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2576 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:02:02,282 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2576 Valid, 318 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-09 06:02:02,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2024-11-09 06:02:02,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 326. [2024-11-09 06:02:02,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.0061538461538462) internal successors, (327), 325 states have internal predecessors, (327), 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 06:02:02,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 327 transitions. [2024-11-09 06:02:02,330 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 327 transitions. Word has length 275 [2024-11-09 06:02:02,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:02:02,331 INFO L471 AbstractCegarLoop]: Abstraction has 326 states and 327 transitions. [2024-11-09 06:02:02,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.3286713286713288) internal successors, (333), 142 states have internal predecessors, (333), 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 06:02:02,331 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 327 transitions. [2024-11-09 06:02:02,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2024-11-09 06:02:02,336 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:02:02,336 INFO L215 NwaCegarLoop]: trace histogram [115, 115, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2024-11-09 06:02:02,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 06:02:02,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:02:02,538 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:02:02,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:02:02,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1871745051, now seen corresponding path program 9 times [2024-11-09 06:02:02,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:02:02,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546624570] [2024-11-09 06:02:02,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:02:02,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:02:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:02:21,300 INFO L134 CoverageAnalysis]: Checked inductivity of 14215 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2024-11-09 06:02:21,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:02:21,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546624570] [2024-11-09 06:02:21,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546624570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:02:21,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285571768] [2024-11-09 06:02:21,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:02:21,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:02:21,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:02:21,303 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:02:21,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 06:02:21,891 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:02:21,891 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:02:21,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 1493 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-11-09 06:02:21,916 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:02:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 14215 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2024-11-09 06:02:30,217 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:02:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 14215 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2024-11-09 06:02:53,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285571768] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:02:53,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1851210367] [2024-11-09 06:02:53,554 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 06:02:53,554 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:02:53,554 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:02:53,555 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:02:53,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:02:53,962 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:02:55,953 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9553#true' at error location [2024-11-09 06:02:55,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:02:55,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:02:55,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117, 117] total 349 [2024-11-09 06:02:55,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733490701] [2024-11-09 06:02:55,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:02:55,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 350 states [2024-11-09 06:02:55,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:02:55,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 350 interpolants. [2024-11-09 06:02:55,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54544, Invalid=72548, Unknown=0, NotChecked=0, Total=127092 [2024-11-09 06:02:55,977 INFO L87 Difference]: Start difference. First operand 326 states and 327 transitions. Second operand has 350 states, 350 states have (on average 2.0085714285714285) internal successors, (703), 349 states have internal predecessors, (703), 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 06:02:59,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:02:59,466 INFO L93 Difference]: Finished difference Result 654 states and 772 transitions. [2024-11-09 06:02:59,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2024-11-09 06:02:59,468 INFO L78 Accepts]: Start accepts. Automaton has has 350 states, 350 states have (on average 2.0085714285714285) internal successors, (703), 349 states have internal predecessors, (703), 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 325 [2024-11-09 06:02:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:02:59,471 INFO L225 Difference]: With dead ends: 654 [2024-11-09 06:02:59,472 INFO L226 Difference]: Without dead ends: 560 [2024-11-09 06:02:59,481 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1090 GetRequests, 735 SyntacticMatches, 0 SemanticMatches, 355 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57526 ImplicationChecksByTransitivity, 39.3s TimeCoverageRelationStatistics Valid=54544, Invalid=72548, Unknown=0, NotChecked=0, Total=127092 [2024-11-09 06:02:59,482 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:02:59,483 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 30 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 06:02:59,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2024-11-09 06:02:59,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2024-11-09 06:02:59,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 559 states have (on average 1.003577817531306) internal successors, (561), 559 states have internal predecessors, (561), 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 06:02:59,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 561 transitions. [2024-11-09 06:02:59,578 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 561 transitions. Word has length 325 [2024-11-09 06:02:59,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:02:59,579 INFO L471 AbstractCegarLoop]: Abstraction has 560 states and 561 transitions. [2024-11-09 06:02:59,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 350 states, 350 states have (on average 2.0085714285714285) internal successors, (703), 349 states have internal predecessors, (703), 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 06:02:59,581 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 561 transitions. [2024-11-09 06:02:59,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2024-11-09 06:02:59,598 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:02:59,598 INFO L215 NwaCegarLoop]: trace histogram [232, 232, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2024-11-09 06:02:59,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 06:02:59,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 06:02:59,799 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:02:59,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:02:59,800 INFO L85 PathProgramCache]: Analyzing trace with hash -662149539, now seen corresponding path program 10 times [2024-11-09 06:02:59,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:02:59,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355695838] [2024-11-09 06:02:59,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:02:59,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:03:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 54814 backedges. 0 proven. 53824 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2024-11-09 06:04:17,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:17,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355695838] [2024-11-09 06:04:17,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355695838] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:04:17,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441293248] [2024-11-09 06:04:17,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:04:17,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:17,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:04:17,118 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:04:17,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 06:04:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:18,167 INFO L255 TraceCheckSpWp]: Trace formula consists of 2780 conjuncts, 235 conjuncts are in the unsatisfiable core [2024-11-09 06:04:18,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:04:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 54814 backedges. 0 proven. 53824 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2024-11-09 06:04:49,033 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:06:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 54814 backedges. 0 proven. 53824 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2024-11-09 06:06:18,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441293248] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:06:18,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [561033699] [2024-11-09 06:06:18,302 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 06:06:18,302 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:06:18,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:06:18,303 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:06:18,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:06:18,521 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:06:21,278 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13603#true' at error location [2024-11-09 06:06:21,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:06:21,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:06:21,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [234, 234, 234] total 700 [2024-11-09 06:06:21,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055399072] [2024-11-09 06:06:21,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:06:21,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 701 states [2024-11-09 06:06:21,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:06:21,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 701 interpolants. [2024-11-09 06:06:21,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218578, Invalid=281978, Unknown=0, NotChecked=0, Total=500556 [2024-11-09 06:06:21,330 INFO L87 Difference]: Start difference. First operand 560 states and 561 transitions. Second operand has 701 states, 701 states have (on average 2.0042796005706136) internal successors, (1405), 700 states have internal predecessors, (1405), 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 06:06:37,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:06:37,238 INFO L93 Difference]: Finished difference Result 1122 states and 1357 transitions. [2024-11-09 06:06:37,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 468 states. [2024-11-09 06:06:37,240 INFO L78 Accepts]: Start accepts. Automaton has has 701 states, 701 states have (on average 2.0042796005706136) internal successors, (1405), 700 states have internal predecessors, (1405), 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 559 [2024-11-09 06:06:37,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:06:37,244 INFO L225 Difference]: With dead ends: 1122 [2024-11-09 06:06:37,245 INFO L226 Difference]: Without dead ends: 1028 [2024-11-09 06:06:37,272 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1909 GetRequests, 1203 SyntacticMatches, 0 SemanticMatches, 706 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224602 ImplicationChecksByTransitivity, 148.0s TimeCoverageRelationStatistics Valid=218578, Invalid=281978, Unknown=0, NotChecked=0, Total=500556 [2024-11-09 06:06:37,273 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:06:37,273 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 30 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-09 06:06:37,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2024-11-09 06:06:37,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 1028. [2024-11-09 06:06:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 1.0019474196689386) internal successors, (1029), 1027 states have internal predecessors, (1029), 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 06:06:37,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1029 transitions. [2024-11-09 06:06:37,392 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1029 transitions. Word has length 559 [2024-11-09 06:06:37,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:06:37,393 INFO L471 AbstractCegarLoop]: Abstraction has 1028 states and 1029 transitions. [2024-11-09 06:06:37,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 701 states, 701 states have (on average 2.0042796005706136) internal successors, (1405), 700 states have internal predecessors, (1405), 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 06:06:37,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1029 transitions. [2024-11-09 06:06:37,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1028 [2024-11-09 06:06:37,431 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:06:37,434 INFO L215 NwaCegarLoop]: trace histogram [466, 466, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2024-11-09 06:06:37,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 06:06:37,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09dd3a1b-2b78-4c08-a2fc-0e963c3f4968/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 06:06:37,636 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:06:37,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:06:37,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1990773601, now seen corresponding path program 11 times [2024-11-09 06:06:37,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:06:37,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756647896] [2024-11-09 06:06:37,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:06:37,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:06:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat