./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_prepend_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_prepend_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a0a808cbaf75e35690b91e29e30a5a3e0888859a17f932e1ee324e5b23ddf983 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 07:29:29,868 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 07:29:29,967 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 07:29:29,976 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 07:29:29,976 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 07:29:30,015 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 07:29:30,016 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 07:29:30,016 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 07:29:30,017 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 07:29:30,017 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 07:29:30,018 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 07:29:30,018 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 07:29:30,019 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 07:29:30,024 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 07:29:30,034 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 07:29:30,034 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 07:29:30,035 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 07:29:30,035 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 07:29:30,036 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 07:29:30,036 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 07:29:30,036 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 07:29:30,037 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 07:29:30,038 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 07:29:30,038 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 07:29:30,039 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 07:29:30,039 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 07:29:30,040 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 07:29:30,040 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 07:29:30,040 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 07:29:30,041 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 07:29:30,041 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 07:29:30,041 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 07:29:30,042 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 07:29:30,042 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 07:29:30,042 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 07:29:30,043 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 07:29:30,043 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 07:29:30,043 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 07:29:30,043 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:29:30,044 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 07:29:30,044 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 07:29:30,046 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 07:29:30,046 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 07:29:30,047 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 07:29:30,047 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 07:29:30,048 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 07:29:30,048 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 07:29:30,048 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_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0a808cbaf75e35690b91e29e30a5a3e0888859a17f932e1ee324e5b23ddf983 [2024-11-09 07:29:30,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 07:29:30,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 07:29:30,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 07:29:30,398 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 07:29:30,399 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 07:29:30,400 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/list-simple/dll2n_prepend_unequal.i Unable to find full path for "g++" [2024-11-09 07:29:32,368 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 07:29:32,625 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 07:29:32,626 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/sv-benchmarks/c/list-simple/dll2n_prepend_unequal.i [2024-11-09 07:29:32,643 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/data/cb31375a9/a8638c00ea654b088af9e3a7c3b37df8/FLAGb9fc012e4 [2024-11-09 07:29:32,663 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/data/cb31375a9/a8638c00ea654b088af9e3a7c3b37df8 [2024-11-09 07:29:32,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 07:29:32,667 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 07:29:32,670 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 07:29:32,671 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 07:29:32,677 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 07:29:32,680 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:29:32" (1/1) ... [2024-11-09 07:29:32,681 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f53ce37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:29:32, skipping insertion in model container [2024-11-09 07:29:32,681 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:29:32" (1/1) ... [2024-11-09 07:29:32,752 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 07:29:33,207 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/sv-benchmarks/c/list-simple/dll2n_prepend_unequal.i[24450,24463] [2024-11-09 07:29:33,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:29:33,235 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 07:29:33,291 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/sv-benchmarks/c/list-simple/dll2n_prepend_unequal.i[24450,24463] [2024-11-09 07:29:33,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:29:33,328 INFO L204 MainTranslator]: Completed translation [2024-11-09 07:29:33,329 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:29:33 WrapperNode [2024-11-09 07:29:33,329 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 07:29:33,330 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 07:29:33,330 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 07:29:33,331 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 07:29:33,337 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:29:33" (1/1) ... [2024-11-09 07:29:33,350 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:29:33" (1/1) ... [2024-11-09 07:29:33,374 INFO L138 Inliner]: procedures = 127, calls = 40, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 122 [2024-11-09 07:29:33,375 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 07:29:33,375 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 07:29:33,376 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 07:29:33,376 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 07:29:33,386 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:29:33" (1/1) ... [2024-11-09 07:29:33,386 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:29:33" (1/1) ... [2024-11-09 07:29:33,394 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:29:33" (1/1) ... [2024-11-09 07:29:33,394 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:29:33" (1/1) ... [2024-11-09 07:29:33,410 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:29:33" (1/1) ... [2024-11-09 07:29:33,421 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:29:33" (1/1) ... [2024-11-09 07:29:33,423 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:29:33" (1/1) ... [2024-11-09 07:29:33,424 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:29:33" (1/1) ... [2024-11-09 07:29:33,433 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 07:29:33,434 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 07:29:33,434 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 07:29:33,435 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 07:29:33,435 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:29:33" (1/1) ... [2024-11-09 07:29:33,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:29:33,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:29:33,477 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 07:29:33,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 07:29:33,507 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2024-11-09 07:29:33,507 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2024-11-09 07:29:33,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 07:29:33,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 07:29:33,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 07:29:33,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 07:29:33,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 07:29:33,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-09 07:29:33,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-09 07:29:33,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 07:29:33,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-09 07:29:33,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 07:29:33,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 07:29:33,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 07:29:33,647 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 07:29:33,650 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 07:29:33,677 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2024-11-09 07:29:33,895 INFO L? ?]: Removed 51 outVars from TransFormulas that were not future-live. [2024-11-09 07:29:33,896 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 07:29:33,980 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 07:29:33,980 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 07:29:33,981 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:29:33 BoogieIcfgContainer [2024-11-09 07:29:33,981 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 07:29:33,984 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 07:29:33,984 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 07:29:33,987 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 07:29:33,987 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 07:29:32" (1/3) ... [2024-11-09 07:29:33,988 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa14b32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:29:33, skipping insertion in model container [2024-11-09 07:29:33,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:29:33" (2/3) ... [2024-11-09 07:29:33,989 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa14b32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:29:33, skipping insertion in model container [2024-11-09 07:29:33,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:29:33" (3/3) ... [2024-11-09 07:29:33,990 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_unequal.i [2024-11-09 07:29:34,009 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 07:29:34,009 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 07:29:34,067 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 07:29:34,074 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7513a5c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 07:29:34,074 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 07:29:34,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 20 states have (on average 1.6) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:29:34,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 07:29:34,086 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:29:34,087 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:29:34,088 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:29:34,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:29:34,093 INFO L85 PathProgramCache]: Analyzing trace with hash -142374617, now seen corresponding path program 1 times [2024-11-09 07:29:34,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:29:34,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899682017] [2024-11-09 07:29:34,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:29:34,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:29:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:29:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:29:34,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:29:34,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899682017] [2024-11-09 07:29:34,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899682017] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:29:34,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:29:34,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 07:29:34,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671674433] [2024-11-09 07:29:34,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:29:34,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:29:34,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:29:34,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:29:34,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:29:34,658 INFO L87 Difference]: Start difference. First operand has 24 states, 20 states have (on average 1.6) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:29:34,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:29:34,772 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2024-11-09 07:29:34,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:29:34,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 07:29:34,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:29:34,783 INFO L225 Difference]: With dead ends: 47 [2024-11-09 07:29:34,783 INFO L226 Difference]: Without dead ends: 19 [2024-11-09 07:29:34,787 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:29:34,793 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:29:34,797 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:29:34,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-09 07:29:34,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2024-11-09 07:29:34,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:29:34,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2024-11-09 07:29:34,837 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 7 [2024-11-09 07:29:34,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:29:34,839 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2024-11-09 07:29:34,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:29:34,840 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2024-11-09 07:29:34,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 07:29:34,843 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:29:34,843 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:29:34,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 07:29:34,844 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:29:34,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:29:34,847 INFO L85 PathProgramCache]: Analyzing trace with hash -189782037, now seen corresponding path program 1 times [2024-11-09 07:29:34,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:29:34,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420345542] [2024-11-09 07:29:34,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:29:34,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:29:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:29:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:29:35,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:29:35,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420345542] [2024-11-09 07:29:35,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420345542] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:29:35,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704103212] [2024-11-09 07:29:35,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:29:35,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:29:35,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:29:35,081 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:29:35,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 07:29:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:29:35,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 07:29:35,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:29:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:29:35,359 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:29:35,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:29:35,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704103212] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:29:35,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2125287645] [2024-11-09 07:29:35,430 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 07:29:35,431 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:29:35,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:29:35,439 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:29:35,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:29:37,630 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:29:48,978 WARN L286 SmtUtils]: Spent 11.14s on a formula simplification. DAG size of input: 221 DAG size of output: 220 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:31:03,579 WARN L286 SmtUtils]: Spent 1.07m on a formula simplification. DAG size of input: 281 DAG size of output: 259 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:31:03,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2125287645] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:31:03,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:31:03,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 10 [2024-11-09 07:31:03,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108737531] [2024-11-09 07:31:03,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:31:03,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 07:31:03,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:31:03,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 07:31:03,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=83, Unknown=3, NotChecked=0, Total=110 [2024-11-09 07:31:03,584 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:31:11,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:31:14,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:31:17,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:31:27,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:31:27,461 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2024-11-09 07:31:27,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 07:31:27,461 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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 11 [2024-11-09 07:31:27,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:31:27,462 INFO L225 Difference]: With dead ends: 27 [2024-11-09 07:31:27,462 INFO L226 Difference]: Without dead ends: 17 [2024-11-09 07:31:27,463 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 92.0s TimeCoverageRelationStatistics Valid=29, Invalid=98, Unknown=5, NotChecked=0, Total=132 [2024-11-09 07:31:27,464 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2024-11-09 07:31:27,465 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 29 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 5 Unknown, 0 Unchecked, 17.8s Time] [2024-11-09 07:31:27,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-09 07:31:27,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2024-11-09 07:31:27,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:31:27,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2024-11-09 07:31:27,471 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2024-11-09 07:31:27,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:31:27,472 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2024-11-09 07:31:27,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:31:27,472 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2024-11-09 07:31:27,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 07:31:27,473 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:31:27,473 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:31:27,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 07:31:27,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:31:27,678 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:31:27,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:31:27,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1991869115, now seen corresponding path program 1 times [2024-11-09 07:31:27,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:31:27,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744236733] [2024-11-09 07:31:27,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:31:27,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:31:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:31:27,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:31:27,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:31:27,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744236733] [2024-11-09 07:31:27,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744236733] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:31:27,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495647430] [2024-11-09 07:31:27,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:31:27,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:31:27,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:31:27,879 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:31:27,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 07:31:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:31:28,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 07:31:28,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:31:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:31:28,048 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:31:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:31:28,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495647430] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:31:28,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2089850147] [2024-11-09 07:31:28,076 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-09 07:31:28,076 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:31:28,076 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:31:28,077 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:31:28,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:31:30,697 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:31:43,073 WARN L286 SmtUtils]: Spent 12.16s on a formula simplification. DAG size of input: 220 DAG size of output: 220 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:33:24,750 WARN L286 SmtUtils]: Spent 1.40m on a formula simplification. DAG size of input: 281 DAG size of output: 259 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:34:57,260 WARN L286 SmtUtils]: Spent 1.44m on a formula simplification. DAG size of input: 285 DAG size of output: 260 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:34:57,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2089850147] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:34:57,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:34:57,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [3, 3, 3] total 11 [2024-11-09 07:34:57,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004112299] [2024-11-09 07:34:57,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:34:57,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 07:34:57,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:34:57,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 07:34:57,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=102, Unknown=4, NotChecked=0, Total=132 [2024-11-09 07:34:57,263 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:35:06,182 WARN L286 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 235 DAG size of output: 148 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:35:08,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:35:10,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:35:14,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:35:17,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:35:18,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:35:22,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:35:35,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:35:38,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:35:40,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:35:40,394 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2024-11-09 07:35:40,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 07:35:40,395 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 07:35:40,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:35:40,396 INFO L225 Difference]: With dead ends: 21 [2024-11-09 07:35:40,396 INFO L226 Difference]: Without dead ends: 18 [2024-11-09 07:35:40,396 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 215.4s TimeCoverageRelationStatistics Valid=31, Invalid=119, Unknown=6, NotChecked=0, Total=156 [2024-11-09 07:35:40,397 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:35:40,399 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 23 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 5 Unknown, 0 Unchecked, 34.3s Time] [2024-11-09 07:35:40,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-09 07:35:40,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-09 07:35:40,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:35:40,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-11-09 07:35:40,417 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2024-11-09 07:35:40,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:35:40,417 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-11-09 07:35:40,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:35:40,418 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-11-09 07:35:40,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-09 07:35:40,418 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:35:40,419 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:35:40,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 07:35:40,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:35:40,620 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:35:40,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:35:40,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1618769161, now seen corresponding path program 1 times [2024-11-09 07:35:40,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:35:40,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914979643] [2024-11-09 07:35:40,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:35:40,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:35:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:35:40,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:35:40,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:35:40,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914979643] [2024-11-09 07:35:40,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914979643] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:35:40,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401686889] [2024-11-09 07:35:40,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:35:40,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:35:40,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:35:40,772 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:35:40,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 07:35:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:35:40,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 07:35:40,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:35:40,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:35:40,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:35:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:35:40,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401686889] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:35:40,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2038495004] [2024-11-09 07:35:40,981 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 07:35:40,981 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:35:40,984 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:35:40,984 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:35:40,984 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:35:44,519 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:36:00,755 WARN L286 SmtUtils]: Spent 15.85s on a formula simplification. DAG size of input: 220 DAG size of output: 220 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:37:46,771 WARN L286 SmtUtils]: Spent 1.48m on a formula simplification. DAG size of input: 281 DAG size of output: 259 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:39:15,098 WARN L286 SmtUtils]: Spent 1.38m on a formula simplification. DAG size of input: 285 DAG size of output: 260 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:41:39,635 WARN L286 SmtUtils]: Spent 2.25m on a formula simplification. DAG size of input: 290 DAG size of output: 260 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:44:05,623 WARN L286 SmtUtils]: Spent 2.29m on a formula simplification. DAG size of input: 299 DAG size of output: 269 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:44:05,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2038495004] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:44:05,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:44:05,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [3, 3, 3] total 13 [2024-11-09 07:44:05,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403902502] [2024-11-09 07:44:05,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:44:05,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 07:44:05,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:44:05,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 07:44:05,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=146, Unknown=6, NotChecked=0, Total=182 [2024-11-09 07:44:05,627 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:44:14,729 WARN L286 SmtUtils]: Spent 5.89s on a formula simplification. DAG size of input: 235 DAG size of output: 146 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:44:16,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:44:18,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:44:21,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:44:24,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:44:26,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:44:31,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:44:37,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:44:41,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:44:48,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:44:52,372 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) 0) 4)) (.cse17 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#s~0#1.base|) 0)) (.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#s~0#1.base|) 0))) (and (= (select (select |c_#memory_$Pointer$.base| .cse0) .cse1) |c_ULTIMATE.start_main_~ptr~0#1.base|) (exists ((|v_#memory_int_73| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_105| (Array Int (Array Int Int))) (|v_#memory_int_52| (Array Int (Array Int Int))) (|v_#memory_int_74| (Array Int (Array Int Int))) (|v_#memory_int_54| (Array Int (Array Int Int))) (|v_#memory_int_55| (Array Int (Array Int Int))) (|v_#memory_int_56| (Array Int (Array Int Int))) (|v_#memory_int_137| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_62| (Array Int (Array Int Int))) (|v_#memory_int_138| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_106| (Array Int (Array Int Int))) (|v_#memory_int_139| (Array Int (Array Int Int))) (|v_#length_32| (Array Int Int)) (|v_#memory_$Pointer$.base_45| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_47| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_62| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_45| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_105| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_47| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_102| (Array Int (Array Int Int))) (|v_#valid_38| (Array Int Int)) (|v_#memory_$Pointer$.offset_102| (Array Int (Array Int Int))) (|v_ULTIMATE.start_dll_create_~head~0#1.base_36| Int) (|v_#memory_int_135| (Array Int (Array Int Int)))) (let ((.cse2 (select (select |v_#memory_$Pointer$.base_106| |c_ULTIMATE.start_main_~#s~0#1.base|) 0))) (let ((.cse21 (select |v_#memory_$Pointer$.offset_62| .cse2)) (.cse24 (select (select |v_#memory_$Pointer$.offset_47| |c_ULTIMATE.start_main_~#s~0#1.base|) 0)) (.cse8 (store (store |v_#valid_38| |c_ULTIMATE.start_main_~#s~0#1.base| 1) |v_ULTIMATE.start_dll_create_~head~0#1.base_36| 1))) (let ((.cse11 (select |v_#memory_$Pointer$.base_62| .cse2)) (.cse15 (select |v_#memory_int_138| |v_ULTIMATE.start_dll_create_~head~0#1.base_36|)) (.cse7 (select |v_#memory_$Pointer$.base_47| .cse0)) (.cse14 (store .cse8 .cse2 1)) (.cse13 (select |v_#memory_$Pointer$.base_105| |v_ULTIMATE.start_dll_create_~head~0#1.base_36|)) (.cse22 (select |v_#memory_$Pointer$.offset_105| |v_ULTIMATE.start_dll_create_~head~0#1.base_36|)) (.cse5 (select (select |v_#memory_$Pointer$.base_47| |c_ULTIMATE.start_main_~#s~0#1.base|) 0)) (.cse6 (+ .cse24 8)) (.cse19 (select |v_#memory_$Pointer$.offset_47| .cse0)) (.cse16 (select |v_#memory_int_135| 1)) (.cse9 (select |v_#memory_int_56| .cse0)) (.cse25 (select |v_#memory_int_55| .cse0)) (.cse3 (select |v_#memory_int_74| .cse2)) (.cse18 (let ((.cse26 (store |v_#memory_$Pointer$.offset_62| .cse2 (store (store .cse21 4 0) 8 0)))) (store .cse26 |v_ULTIMATE.start_dll_create_~head~0#1.base_36| (store (select .cse26 |v_ULTIMATE.start_dll_create_~head~0#1.base_36|) 8 0))))) (and (= (select |v_#length_32| 1) 2) (= |v_#memory_int_74| (store |v_#memory_int_137| .cse2 (store (store (select |v_#memory_int_137| .cse2) 0 1) 4 (select .cse3 4)))) (= (let ((.cse4 (store |v_#memory_$Pointer$.base_47| .cse0 (store .cse7 4 .cse5)))) (store .cse4 .cse5 (store (select .cse4 .cse5) .cse6 .cse0))) |v_#memory_$Pointer$.base_45|) (= 0 (select .cse8 .cse2)) (= |c_#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_45| |c_ULTIMATE.start_main_~#s~0#1.base| (store (select |v_#memory_$Pointer$.offset_45| |c_ULTIMATE.start_main_~#s~0#1.base|) 0 0))) (= |v_#memory_int_56| (store |v_#memory_int_139| .cse0 (store (select |v_#memory_int_139| .cse0) 4 (select .cse9 4)))) (<= (+ |v_ULTIMATE.start_dll_create_~head~0#1.base_36| 1) |c_#StackHeapBarrier|) (= (select |v_#valid_38| |v_ULTIMATE.start_dll_create_~head~0#1.base_36|) 0) (= (select |v_#valid_38| 0) 0) (<= (+ .cse2 1) |c_#StackHeapBarrier|) (= (let ((.cse10 (store |v_#memory_$Pointer$.base_62| .cse2 (store (store .cse11 4 |v_ULTIMATE.start_dll_create_~head~0#1.base_36|) 8 0)))) (store .cse10 |v_ULTIMATE.start_dll_create_~head~0#1.base_36| (store (select .cse10 |v_ULTIMATE.start_dll_create_~head~0#1.base_36|) 8 .cse2))) |v_#memory_$Pointer$.base_106|) (= (let ((.cse12 (store |v_#memory_$Pointer$.base_105| |v_ULTIMATE.start_dll_create_~head~0#1.base_36| (store (store .cse13 4 0) 8 0)))) (store .cse12 .cse2 (store (select .cse12 .cse2) 0 (select .cse11 0)))) |v_#memory_$Pointer$.base_62|) (= (select .cse14 .cse0) 0) (= (select |v_#valid_38| 2) 1) (= (select |v_#valid_38| 1) 1) (= |v_#memory_int_137| (store |v_#memory_int_138| |v_ULTIMATE.start_dll_create_~head~0#1.base_36| (store .cse15 8 (select (select |v_#memory_int_137| |v_ULTIMATE.start_dll_create_~head~0#1.base_36|) 8)))) (not (= 0 |v_ULTIMATE.start_dll_create_~head~0#1.base_36|)) (= (select .cse16 1) 0) (= (store |v_#memory_int_73| |v_ULTIMATE.start_dll_create_~head~0#1.base_36| (store (select |v_#memory_int_73| |v_ULTIMATE.start_dll_create_~head~0#1.base_36|) 8 (select (select |v_#memory_int_139| |v_ULTIMATE.start_dll_create_~head~0#1.base_36|) 8))) |v_#memory_int_139|) (= (store |v_#memory_int_135| |v_ULTIMATE.start_dll_create_~head~0#1.base_36| (store (store (select |v_#memory_int_135| |v_ULTIMATE.start_dll_create_~head~0#1.base_36|) 0 1) 4 (select .cse15 4))) |v_#memory_int_138|) (= (store |v_#memory_int_52| |c_ULTIMATE.start_main_~#s~0#1.base| (store (select |v_#memory_int_52| |c_ULTIMATE.start_main_~#s~0#1.base|) 0 .cse17)) |c_#memory_int|) (= (store |v_#memory_$Pointer$.base_106| .cse0 (store (store (store (select |v_#memory_$Pointer$.base_106| .cse0) 4 0) 8 0) 0 (select .cse7 0))) |v_#memory_$Pointer$.base_47|) (= |c_#valid| (store .cse14 .cse0 1)) (= (store |v_#memory_$Pointer$.base_102| |v_ULTIMATE.start_dll_create_~head~0#1.base_36| (store (select |v_#memory_$Pointer$.base_102| |v_ULTIMATE.start_dll_create_~head~0#1.base_36|) 0 (select .cse13 0))) |v_#memory_$Pointer$.base_105|) (= |v_#memory_int_52| (store |v_#memory_int_54| .cse5 (store (select |v_#memory_int_54| .cse5) .cse6 (select (select |v_#memory_int_52| .cse5) .cse6)))) (= (store (store (store (store |v_#length_32| |c_ULTIMATE.start_main_~#s~0#1.base| 4) |v_ULTIMATE.start_dll_create_~head~0#1.base_36| 12) .cse2 12) .cse0 12) |c_#length|) (= |c_#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_45| |c_ULTIMATE.start_main_~#s~0#1.base| (store (select |v_#memory_$Pointer$.base_45| |c_ULTIMATE.start_main_~#s~0#1.base|) 0 .cse0))) (= (store .cse18 .cse0 (store (store (store (select .cse18 .cse0) 4 0) 8 0) 0 (select .cse19 0))) |v_#memory_$Pointer$.offset_47|) (= (let ((.cse20 (store |v_#memory_$Pointer$.offset_105| |v_ULTIMATE.start_dll_create_~head~0#1.base_36| (store (store .cse22 4 0) 8 0)))) (store .cse20 .cse2 (store (select .cse20 .cse2) 0 (select .cse21 0)))) |v_#memory_$Pointer$.offset_62|) (= (store |v_#memory_$Pointer$.offset_102| |v_ULTIMATE.start_dll_create_~head~0#1.base_36| (store (select |v_#memory_$Pointer$.offset_102| |v_ULTIMATE.start_dll_create_~head~0#1.base_36|) 0 (select .cse22 0))) |v_#memory_$Pointer$.offset_105|) (= (select |v_#length_32| 2) 24) (= (let ((.cse23 (store |v_#memory_$Pointer$.offset_47| .cse0 (store .cse19 4 .cse24)))) (store .cse23 .cse5 (store (select .cse23 .cse5) .cse6 0))) |v_#memory_$Pointer$.offset_45|) (= (select .cse16 0) 48) (= (store |v_#memory_int_56| .cse0 (store .cse9 8 (select .cse25 8))) |v_#memory_int_55|) (= |v_#memory_int_54| (store |v_#memory_int_55| .cse0 (store (store .cse25 0 5) 4 (select (select |v_#memory_int_54| .cse0) 4)))) (= (store |v_#memory_int_74| .cse2 (store .cse3 8 (select (select |v_#memory_int_73| .cse2) 8))) |v_#memory_int_73|) (= (select (select .cse18 |c_ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= (select |v_#valid_38| |c_ULTIMATE.start_main_~#s~0#1.base|) 0)))))) (<= (+ .cse0 1) |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_main_~count~0#1| 1) (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 1 |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_main_~data~0#1| 1) (not (= |c_ULTIMATE.start_main_~ptr~0#1.base| 0)) (= |c_ULTIMATE.start_main_~ptr~0#1.offset| (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1)) (exists ((|v_#memory_int_73| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_105| (Array Int (Array Int Int))) (|v_#memory_int_52| (Array Int (Array Int Int))) (|v_#memory_int_74| (Array Int (Array Int Int))) (|v_#memory_int_54| (Array Int (Array Int Int))) (|v_#memory_int_55| (Array Int (Array Int Int))) (|v_#memory_int_56| (Array Int (Array Int Int))) (|v_#memory_int_137| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_62| (Array Int (Array Int Int))) (|v_#memory_int_138| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_106| (Array Int (Array Int Int))) (|v_#memory_int_139| (Array Int (Array Int Int))) (|v_#length_32| (Array Int Int)) (|v_#memory_$Pointer$.base_45| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_47| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_62| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_45| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_105| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_47| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_102| (Array Int (Array Int Int))) (|v_#valid_38| (Array Int Int)) (|v_#memory_$Pointer$.offset_102| (Array Int (Array Int Int))) (|v_ULTIMATE.start_dll_create_~head~0#1.base_36| Int) (|v_#memory_int_135| (Array Int (Array Int Int)))) (let ((.cse27 (select (select |v_#memory_$Pointer$.base_106| |c_ULTIMATE.start_main_~#s~0#1.base|) 0))) (let ((.cse45 (select |v_#memory_$Pointer$.offset_62| .cse27)) (.cse48 (select (select |v_#memory_$Pointer$.offset_47| |c_ULTIMATE.start_main_~#s~0#1.base|) 0)) (.cse33 (store (store |v_#valid_38| |c_ULTIMATE.start_main_~#s~0#1.base| 1) |v_ULTIMATE.start_dll_create_~head~0#1.base_36| 1))) (let ((.cse36 (select |v_#memory_$Pointer$.base_62| .cse27)) (.cse40 (select |v_#memory_int_138| |v_ULTIMATE.start_dll_create_~head~0#1.base_36|)) (.cse32 (select |v_#memory_$Pointer$.base_47| .cse0)) (.cse39 (store .cse33 .cse27 1)) (.cse38 (select |v_#memory_$Pointer$.base_105| |v_ULTIMATE.start_dll_create_~head~0#1.base_36|)) (.cse46 (select |v_#memory_$Pointer$.offset_105| |v_ULTIMATE.start_dll_create_~head~0#1.base_36|)) (.cse30 (select (select |v_#memory_$Pointer$.base_47| |c_ULTIMATE.start_main_~#s~0#1.base|) 0)) (.cse31 (+ .cse48 8)) (.cse43 (select |v_#memory_$Pointer$.offset_47| .cse0)) (.cse41 (select |v_#memory_int_135| 1)) (.cse34 (select |v_#memory_int_56| .cse0)) (.cse49 (select |v_#memory_int_55| .cse0)) (.cse28 (select |v_#memory_int_74| .cse27)) (.cse42 (let ((.cse50 (store |v_#memory_$Pointer$.offset_62| .cse27 (store (store .cse45 4 0) 8 0)))) (store .cse50 |v_ULTIMATE.start_dll_create_~head~0#1.base_36| (store (select .cse50 |v_ULTIMATE.start_dll_create_~head~0#1.base_36|) 8 0))))) (and (= (select |v_#length_32| 1) 2) (= |v_#memory_int_74| (store |v_#memory_int_137| .cse27 (store (store (select |v_#memory_int_137| .cse27) 0 1) 4 (select .cse28 4)))) (= (let ((.cse29 (store |v_#memory_$Pointer$.base_47| .cse0 (store .cse32 4 .cse30)))) (store .cse29 .cse30 (store (select .cse29 .cse30) .cse31 .cse0))) |v_#memory_$Pointer$.base_45|) (= 0 (select .cse33 .cse27)) (= |c_#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_45| |c_ULTIMATE.start_main_~#s~0#1.base| (store (select |v_#memory_$Pointer$.offset_45| |c_ULTIMATE.start_main_~#s~0#1.base|) 0 0))) (= |v_#memory_int_56| (store |v_#memory_int_139| .cse0 (store (select |v_#memory_int_139| .cse0) 4 (select .cse34 4)))) (<= (+ |v_ULTIMATE.start_dll_create_~head~0#1.base_36| 1) |c_#StackHeapBarrier|) (= (select |v_#valid_38| |v_ULTIMATE.start_dll_create_~head~0#1.base_36|) 0) (= (select |v_#valid_38| 0) 0) (<= (+ .cse27 1) |c_#StackHeapBarrier|) (= (let ((.cse35 (store |v_#memory_$Pointer$.base_62| .cse27 (store (store .cse36 4 |v_ULTIMATE.start_dll_create_~head~0#1.base_36|) 8 0)))) (store .cse35 |v_ULTIMATE.start_dll_create_~head~0#1.base_36| (store (select .cse35 |v_ULTIMATE.start_dll_create_~head~0#1.base_36|) 8 .cse27))) |v_#memory_$Pointer$.base_106|) (= (let ((.cse37 (store |v_#memory_$Pointer$.base_105| |v_ULTIMATE.start_dll_create_~head~0#1.base_36| (store (store .cse38 4 0) 8 0)))) (store .cse37 .cse27 (store (select .cse37 .cse27) 0 (select .cse36 0)))) |v_#memory_$Pointer$.base_62|) (= (select .cse39 .cse0) 0) (= (select |v_#valid_38| 2) 1) (= (select |v_#valid_38| 1) 1) (= |v_#memory_int_137| (store |v_#memory_int_138| |v_ULTIMATE.start_dll_create_~head~0#1.base_36| (store .cse40 8 (select (select |v_#memory_int_137| |v_ULTIMATE.start_dll_create_~head~0#1.base_36|) 8)))) (not (= 0 |v_ULTIMATE.start_dll_create_~head~0#1.base_36|)) (= (select .cse41 1) 0) (= (store |v_#memory_int_73| |v_ULTIMATE.start_dll_create_~head~0#1.base_36| (store (select |v_#memory_int_73| |v_ULTIMATE.start_dll_create_~head~0#1.base_36|) 8 (select (select |v_#memory_int_139| |v_ULTIMATE.start_dll_create_~head~0#1.base_36|) 8))) |v_#memory_int_139|) (= (store |v_#memory_int_135| |v_ULTIMATE.start_dll_create_~head~0#1.base_36| (store (store (select |v_#memory_int_135| |v_ULTIMATE.start_dll_create_~head~0#1.base_36|) 0 1) 4 (select .cse40 4))) |v_#memory_int_138|) (= (store |v_#memory_int_52| |c_ULTIMATE.start_main_~#s~0#1.base| (store (select |v_#memory_int_52| |c_ULTIMATE.start_main_~#s~0#1.base|) 0 .cse17)) |c_#memory_int|) (= (store |v_#memory_$Pointer$.base_106| .cse0 (store (store (store (select |v_#memory_$Pointer$.base_106| .cse0) 4 0) 8 0) 0 (select .cse32 0))) |v_#memory_$Pointer$.base_47|) (= |c_#valid| (store .cse39 .cse0 1)) (= (store |v_#memory_$Pointer$.base_102| |v_ULTIMATE.start_dll_create_~head~0#1.base_36| (store (select |v_#memory_$Pointer$.base_102| |v_ULTIMATE.start_dll_create_~head~0#1.base_36|) 0 (select .cse38 0))) |v_#memory_$Pointer$.base_105|) (= |v_#memory_int_52| (store |v_#memory_int_54| .cse30 (store (select |v_#memory_int_54| .cse30) .cse31 (select (select |v_#memory_int_52| .cse30) .cse31)))) (= (store (store (store (store |v_#length_32| |c_ULTIMATE.start_main_~#s~0#1.base| 4) |v_ULTIMATE.start_dll_create_~head~0#1.base_36| 12) .cse27 12) .cse0 12) |c_#length|) (= |c_#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_45| |c_ULTIMATE.start_main_~#s~0#1.base| (store (select |v_#memory_$Pointer$.base_45| |c_ULTIMATE.start_main_~#s~0#1.base|) 0 .cse0))) (= (store .cse42 .cse0 (store (store (store (select .cse42 .cse0) 4 0) 8 0) 0 (select .cse43 0))) |v_#memory_$Pointer$.offset_47|) (= (let ((.cse44 (store |v_#memory_$Pointer$.offset_105| |v_ULTIMATE.start_dll_create_~head~0#1.base_36| (store (store .cse46 4 0) 8 0)))) (store .cse44 .cse27 (store (select .cse44 .cse27) 0 (select .cse45 0)))) |v_#memory_$Pointer$.offset_62|) (= (store |v_#memory_$Pointer$.offset_102| |v_ULTIMATE.start_dll_create_~head~0#1.base_36| (store (select |v_#memory_$Pointer$.offset_102| |v_ULTIMATE.start_dll_create_~head~0#1.base_36|) 0 (select .cse46 0))) |v_#memory_$Pointer$.offset_105|) (= (select |v_#length_32| 2) 24) (= (let ((.cse47 (store |v_#memory_$Pointer$.offset_47| .cse0 (store .cse43 4 .cse48)))) (store .cse47 .cse30 (store (select .cse47 .cse30) .cse31 0))) |v_#memory_$Pointer$.offset_45|) (not (= .cse27 0)) (= (select .cse41 0) 48) (= (store |v_#memory_int_56| .cse0 (store .cse34 8 (select .cse49 8))) |v_#memory_int_55|) (= |v_#memory_int_54| (store |v_#memory_int_55| .cse0 (store (store .cse49 0 5) 4 (select (select |v_#memory_int_54| .cse0) 4)))) (= (store |v_#memory_int_74| .cse27 (store .cse28 8 (select (select |v_#memory_int_73| .cse27) 8))) |v_#memory_int_73|) (= (select (select .cse42 |c_ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= (select |v_#valid_38| |c_ULTIMATE.start_main_~#s~0#1.base|) 0)))))) (not (= .cse0 0)) (<= (+ |c_#StackHeapBarrier| 1) |c_ULTIMATE.start_main_~#s~0#1.base|) (= |c_ULTIMATE.start_main_~len~0#1| 2))) is different from false [2024-11-09 07:44:54,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:45:00,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:45:01,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:45:01,399 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2024-11-09 07:45:01,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 07:45:01,400 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-09 07:45:01,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:45:01,401 INFO L225 Difference]: With dead ends: 21 [2024-11-09 07:45:01,401 INFO L226 Difference]: Without dead ends: 19 [2024-11-09 07:45:01,401 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 512.2s TimeCoverageRelationStatistics Valid=37, Invalid=168, Unknown=9, NotChecked=26, Total=240 [2024-11-09 07:45:01,402 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 1 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 44.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:45:01,403 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 133 Invalid, 8 Unknown, 9 Unchecked, 44.6s Time] [2024-11-09 07:45:01,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-09 07:45:01,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-09 07:45:01,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:45:01,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-11-09 07:45:01,414 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2024-11-09 07:45:01,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:45:01,415 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-11-09 07:45:01,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:45:01,415 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-11-09 07:45:01,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-09 07:45:01,416 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:45:01,416 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:45:01,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8982bd9a-85cb-416b-9154-cb3e04da51d7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0