./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested3-1_abstracted.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_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/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_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested3-1_abstracted.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/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_8b0b6279-48f7-467f-a616-a942acac4fe4/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 898ef25fdb2ae04f56304d500631f410c196b9a77fbfba6f83248dcfc33b301f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 01:14:41,629 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 01:14:41,723 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 01:14:41,730 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 01:14:41,730 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 01:14:41,765 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 01:14:41,766 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 01:14:41,766 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 01:14:41,768 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 01:14:41,769 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 01:14:41,769 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 01:14:41,770 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 01:14:41,770 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 01:14:41,771 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 01:14:41,773 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 01:14:41,773 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 01:14:41,774 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 01:14:41,774 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 01:14:41,774 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 01:14:41,775 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 01:14:41,779 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 01:14:41,779 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 01:14:41,780 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 01:14:41,780 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 01:14:41,781 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 01:14:41,781 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 01:14:41,781 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 01:14:41,782 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 01:14:41,782 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 01:14:41,782 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 01:14:41,782 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 01:14:41,784 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 01:14:41,785 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 01:14:41,785 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 01:14:41,786 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 01:14:41,786 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 01:14:41,787 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 01:14:41,787 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 01:14:41,787 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:14:41,787 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 01:14:41,788 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 01:14:41,788 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 01:14:41,788 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 01:14:41,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 01:14:41,790 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 01:14:41,790 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 01:14:41,790 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 01:14:41,790 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_8b0b6279-48f7-467f-a616-a942acac4fe4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 898ef25fdb2ae04f56304d500631f410c196b9a77fbfba6f83248dcfc33b301f [2024-11-09 01:14:42,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 01:14:42,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 01:14:42,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 01:14:42,166 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 01:14:42,167 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 01:14:42,169 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/loops-crafted-1/nested3-1_abstracted.c Unable to find full path for "g++" [2024-11-09 01:14:44,180 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 01:14:44,364 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 01:14:44,364 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/sv-benchmarks/c/loops-crafted-1/nested3-1_abstracted.c [2024-11-09 01:14:44,371 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/data/580cc9325/f8594038a7a644b69c88c2baf33f451f/FLAG6982f57b7 [2024-11-09 01:14:44,388 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/data/580cc9325/f8594038a7a644b69c88c2baf33f451f [2024-11-09 01:14:44,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 01:14:44,394 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 01:14:44,400 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 01:14:44,400 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 01:14:44,405 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 01:14:44,406 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:14:44" (1/1) ... [2024-11-09 01:14:44,407 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57858ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:44, skipping insertion in model container [2024-11-09 01:14:44,408 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:14:44" (1/1) ... [2024-11-09 01:14:44,432 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 01:14:44,673 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_8b0b6279-48f7-467f-a616-a942acac4fe4/sv-benchmarks/c/loops-crafted-1/nested3-1_abstracted.c[739,752] [2024-11-09 01:14:44,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:14:44,712 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 01:14:44,726 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_8b0b6279-48f7-467f-a616-a942acac4fe4/sv-benchmarks/c/loops-crafted-1/nested3-1_abstracted.c[739,752] [2024-11-09 01:14:44,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:14:44,751 INFO L204 MainTranslator]: Completed translation [2024-11-09 01:14:44,752 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:44 WrapperNode [2024-11-09 01:14:44,752 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 01:14:44,753 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 01:14:44,754 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 01:14:44,754 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 01:14:44,762 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:44" (1/1) ... [2024-11-09 01:14:44,769 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:44" (1/1) ... [2024-11-09 01:14:44,785 INFO L138 Inliner]: procedures = 20, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 44 [2024-11-09 01:14:44,785 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 01:14:44,786 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 01:14:44,786 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 01:14:44,786 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 01:14:44,796 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:44" (1/1) ... [2024-11-09 01:14:44,797 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:44" (1/1) ... [2024-11-09 01:14:44,798 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:44" (1/1) ... [2024-11-09 01:14:44,798 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:44" (1/1) ... [2024-11-09 01:14:44,801 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:44" (1/1) ... [2024-11-09 01:14:44,805 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:44" (1/1) ... [2024-11-09 01:14:44,806 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:44" (1/1) ... [2024-11-09 01:14:44,807 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:44" (1/1) ... [2024-11-09 01:14:44,809 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 01:14:44,810 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 01:14:44,810 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 01:14:44,811 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 01:14:44,811 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:44" (1/1) ... [2024-11-09 01:14:44,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:14:44,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:44,851 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 01:14:44,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 01:14:44,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 01:14:44,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 01:14:44,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 01:14:44,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 01:14:44,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 01:14:44,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 01:14:44,950 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 01:14:44,953 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 01:14:45,113 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-09 01:14:45,114 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 01:14:45,191 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 01:14:45,191 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 01:14:45,191 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:14:45 BoogieIcfgContainer [2024-11-09 01:14:45,192 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 01:14:45,199 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 01:14:45,199 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 01:14:45,203 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 01:14:45,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:14:44" (1/3) ... [2024-11-09 01:14:45,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@acb0208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:14:45, skipping insertion in model container [2024-11-09 01:14:45,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:44" (2/3) ... [2024-11-09 01:14:45,205 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@acb0208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:14:45, skipping insertion in model container [2024-11-09 01:14:45,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:14:45" (3/3) ... [2024-11-09 01:14:45,207 INFO L112 eAbstractionObserver]: Analyzing ICFG nested3-1_abstracted.c [2024-11-09 01:14:45,229 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 01:14:45,229 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 01:14:45,307 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 01:14:45,314 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;@59495f1e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 01:14:45,314 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 01:14:45,319 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 01:14:45,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 01:14:45,326 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:45,327 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 01:14:45,327 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:45,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:45,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1123149221, now seen corresponding path program 1 times [2024-11-09 01:14:45,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:45,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349269586] [2024-11-09 01:14:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:45,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:45,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:45,554 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 01:14:45,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:45,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349269586] [2024-11-09 01:14:45,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349269586] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:14:45,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:14:45,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 01:14:45,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147347654] [2024-11-09 01:14:45,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:14:45,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:14:45,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:45,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:14:45,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:14:45,592 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:45,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:45,647 INFO L93 Difference]: Finished difference Result 43 states and 66 transitions. [2024-11-09 01:14:45,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:14:45,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-09 01:14:45,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:45,657 INFO L225 Difference]: With dead ends: 43 [2024-11-09 01:14:45,658 INFO L226 Difference]: Without dead ends: 24 [2024-11-09 01:14:45,663 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 01:14:45,670 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:45,673 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 34 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:14:45,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-09 01:14:45,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2024-11-09 01:14:45,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 01:14:45,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2024-11-09 01:14:45,720 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 6 [2024-11-09 01:14:45,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:45,723 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2024-11-09 01:14:45,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:45,724 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2024-11-09 01:14:45,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 01:14:45,726 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:45,726 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:14:45,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 01:14:45,727 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:45,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:45,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1915662925, now seen corresponding path program 1 times [2024-11-09 01:14:45,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:45,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228494098] [2024-11-09 01:14:45,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:45,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:45,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:45,866 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 01:14:45,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:45,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228494098] [2024-11-09 01:14:45,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228494098] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:14:45,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:14:45,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:14:45,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990239719] [2024-11-09 01:14:45,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:14:45,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:14:45,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:45,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:14:45,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:14:45,876 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:45,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:45,909 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2024-11-09 01:14:45,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:14:45,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-09 01:14:45,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:45,911 INFO L225 Difference]: With dead ends: 37 [2024-11-09 01:14:45,911 INFO L226 Difference]: Without dead ends: 22 [2024-11-09 01:14:45,912 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 01:14:45,913 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:45,914 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 31 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:14:45,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-09 01:14:45,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2024-11-09 01:14:45,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 01:14:45,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2024-11-09 01:14:45,920 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 8 [2024-11-09 01:14:45,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:45,920 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2024-11-09 01:14:45,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:45,921 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2024-11-09 01:14:45,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 01:14:45,922 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:45,922 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:14:45,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 01:14:45,922 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:45,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:45,923 INFO L85 PathProgramCache]: Analyzing trace with hash -187516399, now seen corresponding path program 1 times [2024-11-09 01:14:45,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:45,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869503187] [2024-11-09 01:14:45,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:45,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:46,167 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 01:14:46,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:46,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869503187] [2024-11-09 01:14:46,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869503187] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:14:46,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:14:46,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 01:14:46,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814399113] [2024-11-09 01:14:46,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:14:46,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:14:46,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:46,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:14:46,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:14:46,171 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:46,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:46,235 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2024-11-09 01:14:46,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:14:46,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 01:14:46,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:46,237 INFO L225 Difference]: With dead ends: 28 [2024-11-09 01:14:46,237 INFO L226 Difference]: Without dead ends: 26 [2024-11-09 01:14:46,237 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:14:46,239 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:46,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 63 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:14:46,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-09 01:14:46,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2024-11-09 01:14:46,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 01:14:46,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-11-09 01:14:46,246 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2024-11-09 01:14:46,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:46,247 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-11-09 01:14:46,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:46,247 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-11-09 01:14:46,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-09 01:14:46,248 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:46,248 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:14:46,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 01:14:46,249 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:46,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:46,250 INFO L85 PathProgramCache]: Analyzing trace with hash -96590994, now seen corresponding path program 1 times [2024-11-09 01:14:46,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:46,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514357492] [2024-11-09 01:14:46,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:46,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:46,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:46,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:46,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514357492] [2024-11-09 01:14:46,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514357492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:46,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863603621] [2024-11-09 01:14:46,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:46,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:46,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:46,395 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:46,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 01:14:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:46,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 01:14:46,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:46,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:46,593 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:14:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:46,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863603621] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:14:46,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [68930178] [2024-11-09 01:14:46,731 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 01:14:46,732 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:14:46,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:14:46,743 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:14:46,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:14:47,600 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2024-11-09 01:14:47,685 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:14:48,986 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '382#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_10| Int)) (and (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_10|) (= (mod |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_10| 2) 0) (<= 268435455 (mod |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_10| 4294967296)))))' at error location [2024-11-09 01:14:48,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:14:48,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:14:48,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 11 [2024-11-09 01:14:48,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151127964] [2024-11-09 01:14:48,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:14:48,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 01:14:48,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:48,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 01:14:48,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2024-11-09 01:14:48,994 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 01:14:49,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:49,181 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2024-11-09 01:14:49,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 01:14:49,182 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2024-11-09 01:14:49,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:49,183 INFO L225 Difference]: With dead ends: 64 [2024-11-09 01:14:49,183 INFO L226 Difference]: Without dead ends: 43 [2024-11-09 01:14:49,184 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2024-11-09 01:14:49,185 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 22 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:49,185 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 189 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:14:49,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-09 01:14:49,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2024-11-09 01:14:49,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 01:14:49,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2024-11-09 01:14:49,194 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 16 [2024-11-09 01:14:49,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:49,195 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2024-11-09 01:14:49,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 01:14:49,195 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2024-11-09 01:14:49,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 01:14:49,196 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:49,196 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:14:49,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 01:14:49,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:49,397 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:49,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:49,401 INFO L85 PathProgramCache]: Analyzing trace with hash 2030243369, now seen corresponding path program 2 times [2024-11-09 01:14:49,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:49,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198580509] [2024-11-09 01:14:49,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:49,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 01:14:49,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:49,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198580509] [2024-11-09 01:14:49,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198580509] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:49,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113403527] [2024-11-09 01:14:49,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:14:49,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:49,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:49,621 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:49,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 01:14:49,817 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 01:14:49,817 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:14:49,818 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 01:14:49,820 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 01:14:50,040 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:14:50,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113403527] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:14:50,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:14:50,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2024-11-09 01:14:50,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049312579] [2024-11-09 01:14:50,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:14:50,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 01:14:50,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:50,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 01:14:50,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-09 01:14:50,042 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 01:14:50,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:50,236 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2024-11-09 01:14:50,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 01:14:50,237 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2024-11-09 01:14:50,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:50,239 INFO L225 Difference]: With dead ends: 75 [2024-11-09 01:14:50,239 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 01:14:50,240 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-09 01:14:50,241 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:50,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 85 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:14:50,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 01:14:50,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2024-11-09 01:14:50,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 01:14:50,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2024-11-09 01:14:50,252 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2024-11-09 01:14:50,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:50,253 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2024-11-09 01:14:50,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 01:14:50,254 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2024-11-09 01:14:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-09 01:14:50,254 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:50,255 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:14:50,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 01:14:50,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:50,474 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:50,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:50,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1920963638, now seen corresponding path program 1 times [2024-11-09 01:14:50,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:50,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979596550] [2024-11-09 01:14:50,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:50,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 01:14:50,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:50,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979596550] [2024-11-09 01:14:50,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979596550] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:50,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620770264] [2024-11-09 01:14:50,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:50,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:50,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:50,636 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:50,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 01:14:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:50,697 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 01:14:50,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 01:14:50,783 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:14:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 01:14:50,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620770264] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:14:50,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [357178453] [2024-11-09 01:14:50,961 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 01:14:50,961 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:14:50,962 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:14:50,962 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:14:50,962 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:14:52,959 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-09 01:14:52,963 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:14:53,841 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '974#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-09 01:14:53,841 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:14:53,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:14:53,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2024-11-09 01:14:53,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116302510] [2024-11-09 01:14:53,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:14:53,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 01:14:53,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:53,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 01:14:53,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2024-11-09 01:14:53,845 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-09 01:14:54,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:54,348 INFO L93 Difference]: Finished difference Result 121 states and 156 transitions. [2024-11-09 01:14:54,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 01:14:54,349 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 31 [2024-11-09 01:14:54,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:54,352 INFO L225 Difference]: With dead ends: 121 [2024-11-09 01:14:54,352 INFO L226 Difference]: Without dead ends: 95 [2024-11-09 01:14:54,355 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 01:14:54,355 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 58 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:54,356 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 143 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:14:54,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-09 01:14:54,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2024-11-09 01:14:54,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 63 states have internal predecessors, (68), 17 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-09 01:14:54,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2024-11-09 01:14:54,394 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 31 [2024-11-09 01:14:54,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:54,394 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2024-11-09 01:14:54,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-09 01:14:54,395 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2024-11-09 01:14:54,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 01:14:54,400 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:54,401 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 12, 12, 12, 12, 12, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-09 01:14:54,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 01:14:54,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:54,606 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:54,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:54,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1616475557, now seen corresponding path program 2 times [2024-11-09 01:14:54,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:54,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838334460] [2024-11-09 01:14:54,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:54,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 168 proven. 15 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2024-11-09 01:14:54,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:54,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838334460] [2024-11-09 01:14:54,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838334460] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:54,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693405550] [2024-11-09 01:14:54,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:14:54,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:54,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:54,947 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:54,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 01:14:55,017 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 01:14:55,017 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:14:55,018 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 01:14:55,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:55,284 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2024-11-09 01:14:55,284 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:14:55,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693405550] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:14:55,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:14:55,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2024-11-09 01:14:55,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299516189] [2024-11-09 01:14:55,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:14:55,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 01:14:55,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:55,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 01:14:55,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-09 01:14:55,290 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 01:14:55,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:55,482 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2024-11-09 01:14:55,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 01:14:55,483 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 138 [2024-11-09 01:14:55,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:55,484 INFO L225 Difference]: With dead ends: 83 [2024-11-09 01:14:55,484 INFO L226 Difference]: Without dead ends: 0 [2024-11-09 01:14:55,485 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-11-09 01:14:55,486 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:55,486 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 68 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:14:55,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-09 01:14:55,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-09 01:14:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 01:14:55,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-09 01:14:55,488 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 138 [2024-11-09 01:14:55,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:55,489 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-09 01:14:55,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 01:14:55,489 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-09 01:14:55,489 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-09 01:14:55,492 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-09 01:14:55,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 01:14:55,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:55,697 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-11-09 01:14:55,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-09 01:14:57,065 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-09 01:14:57,107 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 01:14:57 BoogieIcfgContainer [2024-11-09 01:14:57,109 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-09 01:14:57,110 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 01:14:57,110 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 01:14:57,110 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 01:14:57,111 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:14:45" (3/4) ... [2024-11-09 01:14:57,114 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-09 01:14:57,118 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-11-09 01:14:57,125 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2024-11-09 01:14:57,125 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-11-09 01:14:57,126 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-09 01:14:57,126 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-09 01:14:57,217 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/witness.graphml [2024-11-09 01:14:57,218 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/witness.yml [2024-11-09 01:14:57,218 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 01:14:57,219 INFO L158 Benchmark]: Toolchain (without parser) took 12824.49ms. Allocated memory was 155.2MB in the beginning and 270.5MB in the end (delta: 115.3MB). Free memory was 117.2MB in the beginning and 104.4MB in the end (delta: 12.8MB). Peak memory consumption was 129.0MB. Max. memory is 16.1GB. [2024-11-09 01:14:57,219 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 104.9MB. Free memory is still 73.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 01:14:57,219 INFO L158 Benchmark]: CACSL2BoogieTranslator took 352.83ms. Allocated memory is still 155.2MB. Free memory was 117.0MB in the beginning and 119.2MB in the end (delta: -2.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-11-09 01:14:57,220 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.24ms. Allocated memory is still 155.2MB. Free memory was 119.2MB in the beginning and 117.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 01:14:57,220 INFO L158 Benchmark]: Boogie Preprocessor took 23.17ms. Allocated memory is still 155.2MB. Free memory was 117.6MB in the beginning and 116.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 01:14:57,220 INFO L158 Benchmark]: RCFGBuilder took 381.66ms. Allocated memory is still 155.2MB. Free memory was 116.6MB in the beginning and 102.5MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-11-09 01:14:57,221 INFO L158 Benchmark]: TraceAbstraction took 11910.56ms. Allocated memory was 155.2MB in the beginning and 270.5MB in the end (delta: 115.3MB). Free memory was 102.0MB in the beginning and 109.6MB in the end (delta: -7.7MB). Peak memory consumption was 109.6MB. Max. memory is 16.1GB. [2024-11-09 01:14:57,221 INFO L158 Benchmark]: Witness Printer took 108.28ms. Allocated memory is still 270.5MB. Free memory was 109.6MB in the beginning and 104.4MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-11-09 01:14:57,222 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 104.9MB. Free memory is still 73.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 352.83ms. Allocated memory is still 155.2MB. Free memory was 117.0MB in the beginning and 119.2MB in the end (delta: -2.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.24ms. Allocated memory is still 155.2MB. Free memory was 119.2MB in the beginning and 117.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.17ms. Allocated memory is still 155.2MB. Free memory was 117.6MB in the beginning and 116.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 381.66ms. Allocated memory is still 155.2MB. Free memory was 116.6MB in the beginning and 102.5MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 11910.56ms. Allocated memory was 155.2MB in the beginning and 270.5MB in the end (delta: 115.3MB). Free memory was 102.0MB in the beginning and 109.6MB in the end (delta: -7.7MB). Peak memory consumption was 109.6MB. Max. memory is 16.1GB. * Witness Printer took 108.28ms. Allocated memory is still 270.5MB. Free memory was 109.6MB in the beginning and 104.4MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.4s, OverallIterations: 7, TraceHistogramMax: 17, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 133 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 119 mSDsluCounter, 613 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 473 mSDsCounter, 39 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 441 IncrementalHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 39 mSolverCounterUnsat, 140 mSDtfsCounter, 441 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 352 GetRequests, 269 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=6, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 38 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 441 NumberOfCodeBlocks, 310 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 475 ConstructedInterpolants, 4 QuantifiedInterpolants, 1051 SizeOfPredicates, 4 NumberOfNonLiveVariables, 236 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 13 InterpolantComputations, 5 PerfectInterpolantSequences, 1789/1828 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: (((((((4294967295 + x) % 4294967296) <= 268435454) && (3 <= (z % 4))) && (268435455 <= y)) && (((4294967295 + y) % 4294967296) <= 268435454)) || (x == 0)) - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: (((((((x <= 268435454) && (((4294967295 + x) % 4294967296) <= 268435454)) && (3 <= (z % 4))) && (((4294967295 + y) % 4294967296) <= 268435454)) || (((x <= 268435454) && (((4294967295 + x) % 4294967296) <= 268435454)) && (y == 0))) || ((y == 0) && (x == 0))) || (((3 <= (z % 4)) && (x == 0)) && (((4294967295 + y) % 4294967296) <= 268435454))) - ProcedureContractResult [Line: 15]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (((cond < 0) || (2 < cond)) || (cond == 1)) Ensures: (((cond < 0) || (2 < cond)) || (cond == 1)) RESULT: Ultimate proved your program to be correct! [2024-11-09 01:14:57,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b0b6279-48f7-467f-a616-a942acac4fe4/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE