./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy2_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_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/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_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy2_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/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_f0c394bc-c761-407d-806b-ded7a7776a3e/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 001066cca5a67e3c9af1d254dd4dcabba7e6cff5ea24a6e35ddcc570894db37c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:47:10,875 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:47:11,000 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:47:11,012 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:47:11,013 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:47:11,036 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:47:11,037 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:47:11,038 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:47:11,038 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:47:11,039 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:47:11,040 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:47:11,040 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:47:11,041 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:47:11,041 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:47:11,042 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:47:11,042 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:47:11,043 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:47:11,044 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:47:11,044 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:47:11,045 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:47:11,045 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:47:11,046 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:47:11,047 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:47:11,047 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:47:11,047 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:47:11,048 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:47:11,048 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:47:11,048 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:47:11,049 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:47:11,049 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:47:11,050 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:47:11,050 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:47:11,050 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:47:11,050 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:47:11,051 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:47:11,051 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:47:11,051 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:47:11,052 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:47:11,052 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:47:11,052 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:47:11,052 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:47:11,053 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:47:11,053 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:47:11,053 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:47:11,054 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:47:11,054 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_f0c394bc-c761-407d-806b-ded7a7776a3e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 001066cca5a67e3c9af1d254dd4dcabba7e6cff5ea24a6e35ddcc570894db37c [2023-11-12 00:47:11,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:47:11,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:47:11,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:47:11,424 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:47:11,424 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:47:11,426 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/array-examples/standard_copy2_ground-1.i [2023-11-12 00:47:14,587 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:47:14,821 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:47:14,822 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/sv-benchmarks/c/array-examples/standard_copy2_ground-1.i [2023-11-12 00:47:14,830 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/data/77fbff242/4a68bd9970c946ebb769e31a96c10cfb/FLAG2defc3482 [2023-11-12 00:47:14,845 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/data/77fbff242/4a68bd9970c946ebb769e31a96c10cfb [2023-11-12 00:47:14,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:47:14,850 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:47:14,852 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:47:14,852 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:47:14,858 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:47:14,859 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:47:14" (1/1) ... [2023-11-12 00:47:14,860 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aba742f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:14, skipping insertion in model container [2023-11-12 00:47:14,860 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:47:14" (1/1) ... [2023-11-12 00:47:14,883 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:47:15,127 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_f0c394bc-c761-407d-806b-ded7a7776a3e/sv-benchmarks/c/array-examples/standard_copy2_ground-1.i[816,829] [2023-11-12 00:47:15,144 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:47:15,154 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:47:15,167 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_f0c394bc-c761-407d-806b-ded7a7776a3e/sv-benchmarks/c/array-examples/standard_copy2_ground-1.i[816,829] [2023-11-12 00:47:15,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:47:15,191 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:47:15,192 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:15 WrapperNode [2023-11-12 00:47:15,192 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:47:15,193 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:47:15,194 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:47:15,194 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:47:15,202 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:15" (1/1) ... [2023-11-12 00:47:15,210 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:15" (1/1) ... [2023-11-12 00:47:15,231 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2023-11-12 00:47:15,232 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:47:15,233 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:47:15,233 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:47:15,233 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:47:15,242 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:15" (1/1) ... [2023-11-12 00:47:15,243 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:15" (1/1) ... [2023-11-12 00:47:15,245 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:15" (1/1) ... [2023-11-12 00:47:15,245 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:15" (1/1) ... [2023-11-12 00:47:15,251 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:15" (1/1) ... [2023-11-12 00:47:15,255 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:15" (1/1) ... [2023-11-12 00:47:15,256 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:15" (1/1) ... [2023-11-12 00:47:15,258 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:15" (1/1) ... [2023-11-12 00:47:15,260 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:47:15,261 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:47:15,261 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:47:15,261 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:47:15,262 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:15" (1/1) ... [2023-11-12 00:47:15,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:47:15,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:15,306 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:47:15,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:47:15,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:47:15,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:47:15,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:47:15,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:47:15,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:47:15,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:47:15,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:47:15,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:47:15,426 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:47:15,428 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:47:15,622 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:47:15,691 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:47:15,691 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 00:47:15,708 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:47:15 BoogieIcfgContainer [2023-11-12 00:47:15,709 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:47:15,711 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:47:15,711 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:47:15,715 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:47:15,715 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:47:14" (1/3) ... [2023-11-12 00:47:15,716 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@133a1b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:47:15, skipping insertion in model container [2023-11-12 00:47:15,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:15" (2/3) ... [2023-11-12 00:47:15,718 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@133a1b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:47:15, skipping insertion in model container [2023-11-12 00:47:15,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:47:15" (3/3) ... [2023-11-12 00:47:15,719 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-1.i [2023-11-12 00:47:15,735 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:47:15,735 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:47:15,777 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:47:15,784 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;@5e2de172, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:47:15,784 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:47:15,788 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 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 00:47:15,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:47:15,793 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:15,793 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:15,794 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:15,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:15,798 INFO L85 PathProgramCache]: Analyzing trace with hash -506070354, now seen corresponding path program 1 times [2023-11-12 00:47:15,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:15,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040736061] [2023-11-12 00:47:15,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:15,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:16,111 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 00:47:16,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:16,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040736061] [2023-11-12 00:47:16,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040736061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:16,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:47:16,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:47:16,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395791554] [2023-11-12 00:47:16,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:16,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:47:16,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:16,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:47:16,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:47:16,163 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 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) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:47:16,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:16,236 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2023-11-12 00:47:16,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:47:16,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 00:47:16,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:16,245 INFO L225 Difference]: With dead ends: 19 [2023-11-12 00:47:16,246 INFO L226 Difference]: Without dead ends: 10 [2023-11-12 00:47:16,248 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 00:47:16,253 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:16,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:47:16,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-12 00:47:16,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-12 00:47:16,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:47:16,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2023-11-12 00:47:16,290 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2023-11-12 00:47:16,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:16,291 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2023-11-12 00:47:16,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:47:16,291 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2023-11-12 00:47:16,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:47:16,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:16,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:16,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:47:16,293 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:16,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:16,295 INFO L85 PathProgramCache]: Analyzing trace with hash -483965599, now seen corresponding path program 1 times [2023-11-12 00:47:16,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:16,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433483309] [2023-11-12 00:47:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:16,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:16,441 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 00:47:16,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:16,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433483309] [2023-11-12 00:47:16,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433483309] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:16,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311727511] [2023-11-12 00:47:16,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:16,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:16,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:16,447 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:16,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:47:16,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:16,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:47:16,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:16,568 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 00:47:16,568 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:47:16,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311727511] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:16,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:47:16,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-12 00:47:16,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653375488] [2023-11-12 00:47:16,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:16,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:47:16,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:16,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:47:16,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:47:16,582 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 00:47:16,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:16,617 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2023-11-12 00:47:16,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:47:16,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2023-11-12 00:47:16,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:16,619 INFO L225 Difference]: With dead ends: 18 [2023-11-12 00:47:16,619 INFO L226 Difference]: Without dead ends: 12 [2023-11-12 00:47:16,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 00:47:16,621 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:16,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:47:16,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-12 00:47:16,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-12 00:47:16,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 00:47:16,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2023-11-12 00:47:16,626 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2023-11-12 00:47:16,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:16,626 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2023-11-12 00:47:16,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 00:47:16,627 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2023-11-12 00:47:16,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 00:47:16,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:16,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:16,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:16,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:16,836 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:16,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:16,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1853715406, now seen corresponding path program 1 times [2023-11-12 00:47:16,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:16,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198686270] [2023-11-12 00:47:16,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:16,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:47:16,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:16,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198686270] [2023-11-12 00:47:16,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198686270] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:16,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908061071] [2023-11-12 00:47:16,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:16,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:16,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:16,996 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:17,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:47:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:17,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:47:17,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:47:17,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:47:17,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908061071] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:17,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1616743247] [2023-11-12 00:47:17,187 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:47:17,187 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:17,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:17,197 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:17,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:17,931 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:18,240 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '191#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) 0) |ULTIMATE.start_main_#t~mem10#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) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-11-12 00:47:18,241 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:47:18,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:47:18,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 00:47:18,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989528525] [2023-11-12 00:47:18,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:47:18,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:47:18,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:18,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:47:18,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:47:18,246 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 00:47:18,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:18,304 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2023-11-12 00:47:18,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:47:18,305 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 10 [2023-11-12 00:47:18,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:18,306 INFO L225 Difference]: With dead ends: 24 [2023-11-12 00:47:18,306 INFO L226 Difference]: Without dead ends: 15 [2023-11-12 00:47:18,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:47:18,311 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:18,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:47:18,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-12 00:47:18,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-12 00:47:18,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:47:18,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-11-12 00:47:18,319 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2023-11-12 00:47:18,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:18,320 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-11-12 00:47:18,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 00:47:18,320 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-11-12 00:47:18,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 00:47:18,321 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:18,321 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:18,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:18,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:18,526 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:18,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:18,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1884843675, now seen corresponding path program 2 times [2023-11-12 00:47:18,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:18,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985277164] [2023-11-12 00:47:18,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:18,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:47:18,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:18,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985277164] [2023-11-12 00:47:18,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985277164] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:18,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27316524] [2023-11-12 00:47:18,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:47:18,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:18,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:18,619 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:18,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:47:18,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:47:18,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:47:18,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:47:18,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:47:18,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:18,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:47:18,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27316524] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:18,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1934932462] [2023-11-12 00:47:18,738 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:47:18,739 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:18,739 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:18,739 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:18,739 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:19,207 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:19,467 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '339#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) 0) |ULTIMATE.start_main_#t~mem10#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) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-11-12 00:47:19,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:47:19,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:47:19,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-12 00:47:19,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585338285] [2023-11-12 00:47:19,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:47:19,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:47:19,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:19,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:47:19,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:47:19,471 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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 00:47:19,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:19,519 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2023-11-12 00:47:19,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:47:19,520 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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 13 [2023-11-12 00:47:19,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:19,521 INFO L225 Difference]: With dead ends: 28 [2023-11-12 00:47:19,521 INFO L226 Difference]: Without dead ends: 21 [2023-11-12 00:47:19,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:47:19,523 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:19,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:47:19,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-12 00:47:19,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-12 00:47:19,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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 00:47:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-11-12 00:47:19,528 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2023-11-12 00:47:19,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:19,529 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-11-12 00:47:19,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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 00:47:19,529 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-11-12 00:47:19,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-12 00:47:19,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:19,530 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:19,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:19,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:19,737 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:19,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:19,737 INFO L85 PathProgramCache]: Analyzing trace with hash -917701586, now seen corresponding path program 3 times [2023-11-12 00:47:19,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:19,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434746000] [2023-11-12 00:47:19,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:19,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-12 00:47:19,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:19,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434746000] [2023-11-12 00:47:19,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434746000] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:19,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552398854] [2023-11-12 00:47:19,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:47:19,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:19,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:19,955 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:19,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:47:20,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:47:20,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:47:20,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:47:20,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-12 00:47:20,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:20,172 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-12 00:47:20,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552398854] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:20,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1462224096] [2023-11-12 00:47:20,177 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:47:20,178 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:20,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:20,178 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:20,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:20,609 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:20,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '549#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) 0) |ULTIMATE.start_main_#t~mem10#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) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-11-12 00:47:20,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:47:20,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:47:20,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-12 00:47:20,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116235390] [2023-11-12 00:47:20,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:47:20,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 00:47:20,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:20,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 00:47:20,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:47:20,983 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:47:21,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:21,028 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2023-11-12 00:47:21,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:47:21,029 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-12 00:47:21,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:21,030 INFO L225 Difference]: With dead ends: 42 [2023-11-12 00:47:21,030 INFO L226 Difference]: Without dead ends: 27 [2023-11-12 00:47:21,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:47:21,032 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:21,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:47:21,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-12 00:47:21,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-12 00:47:21,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:47:21,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-11-12 00:47:21,044 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2023-11-12 00:47:21,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:21,044 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-11-12 00:47:21,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:47:21,044 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-11-12 00:47:21,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-12 00:47:21,046 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:21,046 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:21,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:21,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:21,252 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:21,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:21,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1843722418, now seen corresponding path program 4 times [2023-11-12 00:47:21,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:21,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962414584] [2023-11-12 00:47:21,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:21,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-12 00:47:21,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:21,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962414584] [2023-11-12 00:47:21,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962414584] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:21,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105497530] [2023-11-12 00:47:21,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:47:21,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:21,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:21,607 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:21,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:47:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:21,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 00:47:21,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-12 00:47:21,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-12 00:47:22,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105497530] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:22,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1707763996] [2023-11-12 00:47:22,053 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:47:22,053 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:22,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:22,054 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:22,054 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:22,364 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:22,752 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '847#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) 0) |ULTIMATE.start_main_#t~mem10#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) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-11-12 00:47:22,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:47:22,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:47:22,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-12 00:47:22,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094147608] [2023-11-12 00:47:22,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:47:22,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 00:47:22,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:22,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 00:47:22,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2023-11-12 00:47:22,755 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 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 00:47:22,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:22,822 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2023-11-12 00:47:22,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 00:47:22,823 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-12 00:47:22,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:22,824 INFO L225 Difference]: With dead ends: 54 [2023-11-12 00:47:22,824 INFO L226 Difference]: Without dead ends: 39 [2023-11-12 00:47:22,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2023-11-12 00:47:22,826 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:22,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:47:22,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-12 00:47:22,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-11-12 00:47:22,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 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 00:47:22,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2023-11-12 00:47:22,841 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2023-11-12 00:47:22,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:22,841 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2023-11-12 00:47:22,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 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 00:47:22,842 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2023-11-12 00:47:22,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-12 00:47:22,843 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:22,844 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:22,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:23,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:23,050 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:23,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:23,050 INFO L85 PathProgramCache]: Analyzing trace with hash -13462130, now seen corresponding path program 5 times [2023-11-12 00:47:23,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:23,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763122414] [2023-11-12 00:47:23,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:23,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-12 00:47:23,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:23,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763122414] [2023-11-12 00:47:23,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763122414] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:23,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745873911] [2023-11-12 00:47:23,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:47:23,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:23,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:23,908 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:23,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:47:24,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 00:47:24,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:47:24,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:47:24,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2023-11-12 00:47:24,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2023-11-12 00:47:24,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745873911] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:24,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [628610154] [2023-11-12 00:47:24,298 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:47:24,298 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:24,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:24,299 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:24,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:24,607 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:25,148 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1275#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) 0) |ULTIMATE.start_main_#t~mem10#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) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-11-12 00:47:25,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:47:25,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:47:25,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2023-11-12 00:47:25,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408492952] [2023-11-12 00:47:25,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:47:25,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-12 00:47:25,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:25,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-12 00:47:25,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2023-11-12 00:47:25,152 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 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 00:47:25,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:25,281 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2023-11-12 00:47:25,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-12 00:47:25,281 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 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 37 [2023-11-12 00:47:25,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:25,286 INFO L225 Difference]: With dead ends: 67 [2023-11-12 00:47:25,286 INFO L226 Difference]: Without dead ends: 52 [2023-11-12 00:47:25,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2023-11-12 00:47:25,288 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:25,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:47:25,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-12 00:47:25,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-11-12 00:47:25,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 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 00:47:25,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2023-11-12 00:47:25,307 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 37 [2023-11-12 00:47:25,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:25,307 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2023-11-12 00:47:25,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 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 00:47:25,308 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2023-11-12 00:47:25,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-12 00:47:25,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:25,316 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:25,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:25,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:25,522 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:25,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:25,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2042738783, now seen corresponding path program 6 times [2023-11-12 00:47:25,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:25,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233400717] [2023-11-12 00:47:25,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:25,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-12 00:47:26,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:26,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233400717] [2023-11-12 00:47:26,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233400717] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:26,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246915422] [2023-11-12 00:47:26,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:47:26,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:26,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:26,571 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:26,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:47:26,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:47:26,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:47:26,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-12 00:47:26,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-12 00:47:26,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-12 00:47:27,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246915422] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:27,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [271589094] [2023-11-12 00:47:27,907 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:47:27,907 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:27,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:27,907 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:27,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:28,201 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:28,889 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1849#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) 0) |ULTIMATE.start_main_#t~mem10#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) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-11-12 00:47:28,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:47:28,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:47:28,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2023-11-12 00:47:28,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431589725] [2023-11-12 00:47:28,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:47:28,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-12 00:47:28,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:28,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-12 00:47:28,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2023-11-12 00:47:28,906 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 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 00:47:29,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:29,025 INFO L93 Difference]: Finished difference Result 104 states and 134 transitions. [2023-11-12 00:47:29,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-12 00:47:29,029 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 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 50 [2023-11-12 00:47:29,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:29,030 INFO L225 Difference]: With dead ends: 104 [2023-11-12 00:47:29,030 INFO L226 Difference]: Without dead ends: 77 [2023-11-12 00:47:29,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 108 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2023-11-12 00:47:29,033 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:29,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:47:29,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-12 00:47:29,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-11-12 00:47:29,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:47:29,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2023-11-12 00:47:29,041 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 50 [2023-11-12 00:47:29,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:29,041 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2023-11-12 00:47:29,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 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 00:47:29,042 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2023-11-12 00:47:29,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-12 00:47:29,043 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:29,043 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:29,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:29,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:29,250 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:29,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:29,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2060351602, now seen corresponding path program 7 times [2023-11-12 00:47:29,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:29,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312955867] [2023-11-12 00:47:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:29,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-12 00:47:32,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:32,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312955867] [2023-11-12 00:47:32,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312955867] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:32,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743450427] [2023-11-12 00:47:32,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:47:32,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:32,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:32,158 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:32,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:47:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:32,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-12 00:47:32,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-12 00:47:32,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-12 00:47:36,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743450427] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:36,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [479305008] [2023-11-12 00:47:36,079 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:47:36,079 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:36,079 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:36,079 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:36,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:36,399 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:37,422 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2747#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) 0) |ULTIMATE.start_main_#t~mem10#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) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-11-12 00:47:37,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:47:37,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:47:37,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2023-11-12 00:47:37,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822169401] [2023-11-12 00:47:37,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:47:37,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-11-12 00:47:37,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:37,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-11-12 00:47:37,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2023-11-12 00:47:37,432 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:47:37,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:37,671 INFO L93 Difference]: Finished difference Result 154 states and 209 transitions. [2023-11-12 00:47:37,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-11-12 00:47:37,671 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-11-12 00:47:37,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:37,673 INFO L225 Difference]: With dead ends: 154 [2023-11-12 00:47:37,673 INFO L226 Difference]: Without dead ends: 127 [2023-11-12 00:47:37,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 158 SyntacticMatches, 11 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2023-11-12 00:47:37,678 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:37,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:47:37,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-12 00:47:37,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-11-12 00:47:37,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 126 states have internal predecessors, (130), 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 00:47:37,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2023-11-12 00:47:37,690 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 75 [2023-11-12 00:47:37,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:37,691 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2023-11-12 00:47:37,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:47:37,691 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2023-11-12 00:47:37,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-12 00:47:37,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:37,705 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:37,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:37,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:37,913 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:37,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:37,914 INFO L85 PathProgramCache]: Analyzing trace with hash -543873298, now seen corresponding path program 8 times [2023-11-12 00:47:37,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:37,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129184843] [2023-11-12 00:47:37,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:37,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:38,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:47,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-12 00:47:47,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:47,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129184843] [2023-11-12 00:47:47,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129184843] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:47,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569494840] [2023-11-12 00:47:47,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:47:47,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:47,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:47,157 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:47,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 00:47:50,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-12 00:47:50,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:47:50,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 00:47:50,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4906 trivial. 0 not checked. [2023-11-12 00:47:51,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4906 trivial. 0 not checked. [2023-11-12 00:47:52,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569494840] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:52,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1619062622] [2023-11-12 00:47:52,148 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:47:52,148 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:52,149 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:52,149 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:52,149 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:52,401 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:53,111 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4167#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) 0) |ULTIMATE.start_main_#t~mem10#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) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-11-12 00:47:53,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:47:53,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:47:53,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2023-11-12 00:47:53,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806337978] [2023-11-12 00:47:53,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:47:53,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-11-12 00:47:53,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:53,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-11-12 00:47:53,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2023-11-12 00:47:53,122 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 123 states, 123 states have (on average 1.0975609756097562) internal successors, (135), 123 states have internal predecessors, (135), 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 00:47:53,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:53,531 INFO L93 Difference]: Finished difference Result 179 states and 209 transitions. [2023-11-12 00:47:53,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-11-12 00:47:53,532 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.0975609756097562) internal successors, (135), 123 states have internal predecessors, (135), 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 125 [2023-11-12 00:47:53,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:53,534 INFO L225 Difference]: With dead ends: 179 [2023-11-12 00:47:53,534 INFO L226 Difference]: Without dead ends: 152 [2023-11-12 00:47:53,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2023-11-12 00:47:53,540 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:53,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:47:53,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-12 00:47:53,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2023-11-12 00:47:53,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0264900662251655) internal successors, (155), 151 states have internal predecessors, (155), 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 00:47:53,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2023-11-12 00:47:53,557 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 125 [2023-11-12 00:47:53,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:53,558 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2023-11-12 00:47:53,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.0975609756097562) internal successors, (135), 123 states have internal predecessors, (135), 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 00:47:53,559 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2023-11-12 00:47:53,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-12 00:47:53,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:53,561 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:53,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-12 00:47:53,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c394bc-c761-407d-806b-ded7a7776a3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 00:47:53,772 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:53,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:53,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1267948895, now seen corresponding path program 9 times [2023-11-12 00:47:53,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:53,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606757716] [2023-11-12 00:47:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:53,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat