./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy9_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy9_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX --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 904ada5b631ac9ba69e93f7c5eb51a71b3a5f4ed245a1ea57aa3fec5e9b98c37 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:58:54,828 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:58:54,932 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:58:54,938 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:58:54,939 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:58:55,001 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:58:55,003 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:58:55,004 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:58:55,005 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:58:55,011 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:58:55,012 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:58:55,013 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:58:55,013 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:58:55,016 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:58:55,016 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:58:55,017 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:58:55,017 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:58:55,018 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:58:55,018 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:58:55,019 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:58:55,019 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:58:55,020 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:58:55,021 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:58:55,021 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:58:55,022 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:58:55,022 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:58:55,022 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:58:55,023 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:58:55,023 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:58:55,024 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:58:55,024 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:58:55,025 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:58:55,025 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:58:55,025 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:58:55,025 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:58:55,026 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:58:55,026 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:58:55,026 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:58:55,039 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:58:55,039 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:58:55,040 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:58:55,040 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:58:55,040 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:58:55,041 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:58:55,041 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:58:55,042 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_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 904ada5b631ac9ba69e93f7c5eb51a71b3a5f4ed245a1ea57aa3fec5e9b98c37 [2023-11-12 00:58:55,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:58:55,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:58:55,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:58:55,481 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:58:55,482 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:58:55,484 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/array-examples/standard_copy9_ground-1.i [2023-11-12 00:58:58,766 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:58:59,025 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:58:59,026 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/sv-benchmarks/c/array-examples/standard_copy9_ground-1.i [2023-11-12 00:58:59,037 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/data/754fae53e/5701fe4882044d4aba7137af22cb99d5/FLAG596724a24 [2023-11-12 00:58:59,053 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/data/754fae53e/5701fe4882044d4aba7137af22cb99d5 [2023-11-12 00:58:59,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:58:59,058 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:58:59,060 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:58:59,060 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:58:59,066 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:58:59,067 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:58:59" (1/1) ... [2023-11-12 00:58:59,068 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14659435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:59, skipping insertion in model container [2023-11-12 00:58:59,069 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:58:59" (1/1) ... [2023-11-12 00:58:59,105 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:58:59,314 WARN L240 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_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/sv-benchmarks/c/array-examples/standard_copy9_ground-1.i[816,829] [2023-11-12 00:58:59,371 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:58:59,381 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:58:59,397 WARN L240 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_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/sv-benchmarks/c/array-examples/standard_copy9_ground-1.i[816,829] [2023-11-12 00:58:59,438 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:58:59,460 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:58:59,461 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:59 WrapperNode [2023-11-12 00:58:59,461 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:58:59,463 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:58:59,463 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:58:59,463 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:58:59,472 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:59" (1/1) ... [2023-11-12 00:58:59,493 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:59" (1/1) ... [2023-11-12 00:58:59,532 INFO L138 Inliner]: procedures = 16, calls = 59, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 196 [2023-11-12 00:58:59,533 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:58:59,534 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:58:59,534 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:58:59,534 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:58:59,544 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:59" (1/1) ... [2023-11-12 00:58:59,545 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:59" (1/1) ... [2023-11-12 00:58:59,562 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:59" (1/1) ... [2023-11-12 00:58:59,566 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:59" (1/1) ... [2023-11-12 00:58:59,573 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:59" (1/1) ... [2023-11-12 00:58:59,587 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:59" (1/1) ... [2023-11-12 00:58:59,594 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:59" (1/1) ... [2023-11-12 00:58:59,596 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:59" (1/1) ... [2023-11-12 00:58:59,599 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:58:59,600 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:58:59,600 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:58:59,600 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:58:59,601 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:59" (1/1) ... [2023-11-12 00:58:59,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:58:59,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:58:59,691 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:58:59,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:58:59,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:58:59,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:58:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:58:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:58:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:58:59,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:58:59,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:58:59,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:58:59,838 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:58:59,841 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:59:00,288 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:59:00,426 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:59:00,426 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-12 00:59:00,429 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:00 BoogieIcfgContainer [2023-11-12 00:59:00,430 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:59:00,436 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:59:00,436 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:59:00,440 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:59:00,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:58:59" (1/3) ... [2023-11-12 00:59:00,442 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@caef8a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:00, skipping insertion in model container [2023-11-12 00:59:00,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:59" (2/3) ... [2023-11-12 00:59:00,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@caef8a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:00, skipping insertion in model container [2023-11-12 00:59:00,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:00" (3/3) ... [2023-11-12 00:59:00,446 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-1.i [2023-11-12 00:59:00,472 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:59:00,472 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:59:00,532 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:59:00,539 INFO L357 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, mHoare=true, 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;@4c8a8ccd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:59:00,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:59:00,545 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:59:00,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:59:00,553 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:00,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:00,556 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:00,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:00,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1000355614, now seen corresponding path program 1 times [2023-11-12 00:59:00,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:00,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375624481] [2023-11-12 00:59:00,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:00,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:00,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:00,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375624481] [2023-11-12 00:59:00,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375624481] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:00,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:00,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:59:00,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369111986] [2023-11-12 00:59:00,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:00,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:59:00,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:01,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:59:01,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:59:01,027 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:59:01,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:01,134 INFO L93 Difference]: Finished difference Result 33 states and 55 transitions. [2023-11-12 00:59:01,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:59:01,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-12 00:59:01,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:01,145 INFO L225 Difference]: With dead ends: 33 [2023-11-12 00:59:01,145 INFO L226 Difference]: Without dead ends: 17 [2023-11-12 00:59:01,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:59:01,152 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:01,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:01,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-12 00:59:01,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-12 00:59:01,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 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) [2023-11-12 00:59:01,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 27 transitions. [2023-11-12 00:59:01,189 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 27 transitions. Word has length 14 [2023-11-12 00:59:01,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:01,190 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 27 transitions. [2023-11-12 00:59:01,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:59:01,190 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 27 transitions. [2023-11-12 00:59:01,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 00:59:01,191 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:01,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:01,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:59:01,192 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:01,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:01,193 INFO L85 PathProgramCache]: Analyzing trace with hash -921133653, now seen corresponding path program 1 times [2023-11-12 00:59:01,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:01,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951965375] [2023-11-12 00:59:01,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:01,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:01,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:01,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951965375] [2023-11-12 00:59:01,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951965375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:01,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40551605] [2023-11-12 00:59:01,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:01,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:01,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:01,351 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:01,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:59:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:01,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:59:01,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:59:01,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:59:01,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40551605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:01,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:59:01,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-12 00:59:01,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810886500] [2023-11-12 00:59:01,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:01,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:59:01,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:01,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:59:01,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:59:01,590 INFO L87 Difference]: Start difference. First operand 17 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:59:01,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:01,704 INFO L93 Difference]: Finished difference Result 39 states and 66 transitions. [2023-11-12 00:59:01,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:59:01,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-12 00:59:01,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:01,709 INFO L225 Difference]: With dead ends: 39 [2023-11-12 00:59:01,709 INFO L226 Difference]: Without dead ends: 26 [2023-11-12 00:59:01,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:59:01,713 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:01,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:01,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-12 00:59:01,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-12 00:59:01,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 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) [2023-11-12 00:59:01,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2023-11-12 00:59:01,731 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 15 [2023-11-12 00:59:01,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:01,732 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2023-11-12 00:59:01,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:59:01,732 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2023-11-12 00:59:01,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 00:59:01,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:01,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:01,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:01,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:01,942 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:01,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:01,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1513521095, now seen corresponding path program 1 times [2023-11-12 00:59:01,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:01,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977509768] [2023-11-12 00:59:01,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:01,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 00:59:02,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:02,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977509768] [2023-11-12 00:59:02,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977509768] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:02,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549103506] [2023-11-12 00:59:02,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:02,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:02,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:02,185 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:02,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:59:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:02,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:59:02,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 00:59:02,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:59:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 00:59:02,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549103506] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:59:02,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1161264190] [2023-11-12 00:59:02,439 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:59:02,439 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:59:02,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:59:02,449 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:59:02,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:59:05,061 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:59:06,193 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '415#(and (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|)) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) 0) |ULTIMATE.start_main_#t~mem24#1|) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem23#1|) (<= 2 |ULTIMATE.start_main_~#a0~0#1.base|))' at error location [2023-11-12 00:59:06,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:59:06,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:59:06,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 00:59:06,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768351833] [2023-11-12 00:59:06,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:59:06,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:59:06,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:06,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:59:06,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:59:06,196 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 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) [2023-11-12 00:59:06,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:06,321 INFO L93 Difference]: Finished difference Result 52 states and 74 transitions. [2023-11-12 00:59:06,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:59:06,322 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-12 00:59:06,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:06,323 INFO L225 Difference]: With dead ends: 52 [2023-11-12 00:59:06,324 INFO L226 Difference]: Without dead ends: 29 [2023-11-12 00:59:06,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 49 SyntacticMatches, 14 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:59:06,327 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:06,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:06,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-12 00:59:06,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-12 00:59:06,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 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) [2023-11-12 00:59:06,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2023-11-12 00:59:06,343 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2023-11-12 00:59:06,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:06,343 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2023-11-12 00:59:06,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 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) [2023-11-12 00:59:06,344 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2023-11-12 00:59:06,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-12 00:59:06,345 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:06,345 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:06,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:06,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:06,553 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:06,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:06,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1724522658, now seen corresponding path program 2 times [2023-11-12 00:59:06,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:06,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121837317] [2023-11-12 00:59:06,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:06,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 00:59:06,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:06,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121837317] [2023-11-12 00:59:06,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121837317] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:06,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070951457] [2023-11-12 00:59:06,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:59:06,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:06,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:06,761 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:06,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:59:06,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:59:06,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:59:06,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:59:06,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 00:59:06,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:59:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 00:59:06,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070951457] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:59:06,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1312829428] [2023-11-12 00:59:06,967 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:59:06,967 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:59:06,968 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:59:06,968 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:59:06,968 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:59:09,080 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:59:09,887 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '731#(and (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|)) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) 0) |ULTIMATE.start_main_#t~mem24#1|) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem23#1|) (<= 2 |ULTIMATE.start_main_~#a0~0#1.base|))' at error location [2023-11-12 00:59:09,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:59:09,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:59:09,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-12 00:59:09,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347183684] [2023-11-12 00:59:09,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:59:09,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:59:09,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:09,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:59:09,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:59:09,890 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 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) [2023-11-12 00:59:10,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:10,116 INFO L93 Difference]: Finished difference Result 77 states and 122 transitions. [2023-11-12 00:59:10,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:59:10,116 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-12 00:59:10,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:10,120 INFO L225 Difference]: With dead ends: 77 [2023-11-12 00:59:10,121 INFO L226 Difference]: Without dead ends: 56 [2023-11-12 00:59:10,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:59:10,122 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:10,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:59:10,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-12 00:59:10,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-12 00:59:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2) internal successors, (66), 55 states have internal predecessors, (66), 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) [2023-11-12 00:59:10,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2023-11-12 00:59:10,138 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 27 [2023-11-12 00:59:10,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:10,138 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2023-11-12 00:59:10,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 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) [2023-11-12 00:59:10,139 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2023-11-12 00:59:10,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-12 00:59:10,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:10,144 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:10,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:10,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:10,352 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:10,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:10,352 INFO L85 PathProgramCache]: Analyzing trace with hash -2087294174, now seen corresponding path program 3 times [2023-11-12 00:59:10,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:10,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708722325] [2023-11-12 00:59:10,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:10,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-12 00:59:10,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:10,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708722325] [2023-11-12 00:59:10,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708722325] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:10,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720306776] [2023-11-12 00:59:10,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:59:10,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:10,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:10,709 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:10,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:59:10,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:59:10,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:59:10,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:59:10,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-12 00:59:10,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:59:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-12 00:59:10,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720306776] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:59:10,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [958699923] [2023-11-12 00:59:11,000 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:59:11,000 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:59:11,001 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:59:11,001 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:59:11,001 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:59:12,442 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:59:13,683 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1319#(and (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|)) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) 0) |ULTIMATE.start_main_#t~mem24#1|) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem23#1|) (<= 2 |ULTIMATE.start_main_~#a0~0#1.base|))' at error location [2023-11-12 00:59:13,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:59:13,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:59:13,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-12 00:59:13,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216923480] [2023-11-12 00:59:13,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:59:13,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 00:59:13,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:13,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 00:59:13,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:59:13,686 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:59:13,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:13,794 INFO L93 Difference]: Finished difference Result 112 states and 137 transitions. [2023-11-12 00:59:13,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:59:13,795 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-11-12 00:59:13,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:13,796 INFO L225 Difference]: With dead ends: 112 [2023-11-12 00:59:13,796 INFO L226 Difference]: Without dead ends: 62 [2023-11-12 00:59:13,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 125 SyntacticMatches, 25 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:59:13,798 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:13,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:13,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-12 00:59:13,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-12 00:59:13,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:59:13,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2023-11-12 00:59:13,809 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 54 [2023-11-12 00:59:13,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:13,809 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2023-11-12 00:59:13,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:59:13,810 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2023-11-12 00:59:13,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-12 00:59:13,811 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:13,812 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:13,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:14,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:14,020 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:14,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:14,021 INFO L85 PathProgramCache]: Analyzing trace with hash -522977662, now seen corresponding path program 4 times [2023-11-12 00:59:14,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:14,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009226935] [2023-11-12 00:59:14,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:14,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-12 00:59:14,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:14,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009226935] [2023-11-12 00:59:14,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009226935] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:14,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393975607] [2023-11-12 00:59:14,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:59:14,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:14,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:14,615 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:14,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:59:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:14,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 00:59:14,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-12 00:59:14,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:59:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-12 00:59:15,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393975607] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:59:15,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2009093564] [2023-11-12 00:59:15,174 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:59:15,174 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:59:15,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:59:15,175 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:59:15,175 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:59:16,529 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:59:18,194 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2037#(and (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|)) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) 0) |ULTIMATE.start_main_#t~mem24#1|) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem23#1|) (<= 2 |ULTIMATE.start_main_~#a0~0#1.base|))' at error location [2023-11-12 00:59:18,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:59:18,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:59:18,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-12 00:59:18,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734584331] [2023-11-12 00:59:18,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:59:18,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 00:59:18,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:18,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 00:59:18,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2023-11-12 00:59:18,198 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 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) [2023-11-12 00:59:18,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:18,351 INFO L93 Difference]: Finished difference Result 124 states and 155 transitions. [2023-11-12 00:59:18,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 00:59:18,352 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-11-12 00:59:18,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:18,356 INFO L225 Difference]: With dead ends: 124 [2023-11-12 00:59:18,356 INFO L226 Difference]: Without dead ends: 74 [2023-11-12 00:59:18,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 132 SyntacticMatches, 30 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2023-11-12 00:59:18,361 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:18,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:18,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-12 00:59:18,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-11-12 00:59:18,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 73 states have internal predecessors, (84), 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) [2023-11-12 00:59:18,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2023-11-12 00:59:18,372 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 60 [2023-11-12 00:59:18,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:18,373 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2023-11-12 00:59:18,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 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) [2023-11-12 00:59:18,374 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2023-11-12 00:59:18,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-12 00:59:18,375 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:18,376 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:18,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:18,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:18,580 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:18,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:18,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1102508734, now seen corresponding path program 5 times [2023-11-12 00:59:18,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:18,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942684812] [2023-11-12 00:59:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:18,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-12 00:59:19,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:19,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942684812] [2023-11-12 00:59:19,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942684812] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:19,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129604985] [2023-11-12 00:59:19,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:59:19,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:19,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:19,859 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:19,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:59:20,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 00:59:20,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:59:20,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:59:20,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2023-11-12 00:59:20,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:59:20,861 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2023-11-12 00:59:20,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129604985] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:59:20,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1232038777] [2023-11-12 00:59:20,864 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:59:20,864 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:59:20,865 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:59:20,865 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:59:20,865 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:59:22,546 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:59:24,041 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2885#(and (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|)) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) 0) |ULTIMATE.start_main_#t~mem24#1|) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem23#1|) (<= 2 |ULTIMATE.start_main_~#a0~0#1.base|))' at error location [2023-11-12 00:59:24,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:59:24,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:59:24,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2023-11-12 00:59:24,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920038029] [2023-11-12 00:59:24,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:59:24,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-12 00:59:24,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:24,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-12 00:59:24,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2023-11-12 00:59:24,046 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 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) [2023-11-12 00:59:24,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:24,594 INFO L93 Difference]: Finished difference Result 179 states and 253 transitions. [2023-11-12 00:59:24,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-12 00:59:24,595 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2023-11-12 00:59:24,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:24,596 INFO L225 Difference]: With dead ends: 179 [2023-11-12 00:59:24,597 INFO L226 Difference]: Without dead ends: 129 [2023-11-12 00:59:24,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 190 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2023-11-12 00:59:24,599 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:24,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:59:24,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-12 00:59:24,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-11-12 00:59:24,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.0859375) internal successors, (139), 128 states have internal predecessors, (139), 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) [2023-11-12 00:59:24,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2023-11-12 00:59:24,630 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 72 [2023-11-12 00:59:24,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:24,633 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2023-11-12 00:59:24,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 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) [2023-11-12 00:59:24,634 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2023-11-12 00:59:24,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-12 00:59:24,645 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:24,645 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:24,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:24,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:24,856 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:24,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:24,857 INFO L85 PathProgramCache]: Analyzing trace with hash -2071195637, now seen corresponding path program 6 times [2023-11-12 00:59:24,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:24,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573626913] [2023-11-12 00:59:24,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:24,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-11-12 00:59:26,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:26,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573626913] [2023-11-12 00:59:26,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573626913] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:26,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140309313] [2023-11-12 00:59:26,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:59:26,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:26,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:26,556 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:26,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:59:27,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:59:27,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:59:27,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-12 00:59:27,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-11-12 00:59:27,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:59:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-11-12 00:59:28,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140309313] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:59:28,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [120901067] [2023-11-12 00:59:28,096 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:59:28,096 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:59:28,096 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:59:28,096 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:59:28,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:59:29,622 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:59:33,884 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4299#(and (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|)) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) 0) |ULTIMATE.start_main_#t~mem24#1|) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem23#1|) (<= 2 |ULTIMATE.start_main_~#a0~0#1.base|))' at error location [2023-11-12 00:59:33,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:59:33,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:59:33,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2023-11-12 00:59:33,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657338762] [2023-11-12 00:59:33,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:59:33,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-12 00:59:33,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:33,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-12 00:59:33,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2023-11-12 00:59:33,891 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 50 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:59:34,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:34,095 INFO L93 Difference]: Finished difference Result 258 states and 302 transitions. [2023-11-12 00:59:34,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-12 00:59:34,096 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 50 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2023-11-12 00:59:34,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:34,097 INFO L225 Difference]: With dead ends: 258 [2023-11-12 00:59:34,098 INFO L226 Difference]: Without dead ends: 154 [2023-11-12 00:59:34,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 284 SyntacticMatches, 66 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5204 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2023-11-12 00:59:34,101 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:34,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:59:34,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-12 00:59:34,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2023-11-12 00:59:34,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0718954248366013) internal successors, (164), 153 states have internal predecessors, (164), 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) [2023-11-12 00:59:34,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 164 transitions. [2023-11-12 00:59:34,121 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 164 transitions. Word has length 127 [2023-11-12 00:59:34,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:34,121 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 164 transitions. [2023-11-12 00:59:34,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 50 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:59:34,122 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 164 transitions. [2023-11-12 00:59:34,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-12 00:59:34,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:34,125 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:34,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:34,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:34,339 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:34,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:34,339 INFO L85 PathProgramCache]: Analyzing trace with hash 670969826, now seen corresponding path program 7 times [2023-11-12 00:59:34,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:34,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770523014] [2023-11-12 00:59:34,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:34,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-11-12 00:59:38,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:38,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770523014] [2023-11-12 00:59:38,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770523014] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:38,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324038793] [2023-11-12 00:59:38,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:59:38,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:38,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:38,518 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:38,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787e5135-7fe7-45db-a4cc-5f6d3d4b061d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:59:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:39,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 1465 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-12 00:59:39,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-11-12 00:59:39,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:59:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-11-12 00:59:42,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324038793] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:59:42,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1269814119] [2023-11-12 00:59:42,718 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:59:42,718 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:59:42,719 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:59:42,719 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:59:42,719 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:59:44,226 INFO L180 IcfgInterpreter]: Interpretation finished