./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 60a477b5dcc7be77af17ce3cc379f1876781ed95f896fb2ca2dbb7ba91ecb849 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:16:00,671 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:16:00,761 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-14 04:16:00,767 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:16:00,768 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:16:00,820 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:16:00,822 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:16:00,822 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:16:00,823 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:16:00,823 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:16:00,824 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:16:00,824 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:16:00,824 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:16:00,824 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:16:00,825 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:16:00,826 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:16:00,826 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:16:00,826 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:16:00,826 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:16:00,826 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:16:00,826 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:16:00,826 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:16:00,827 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 04:16:00,827 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 04:16:00,827 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:16:00,827 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:16:00,827 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:16:00,827 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:16:00,828 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:16:00,828 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 04:16:00,828 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 04:16:00,828 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 04:16:00,828 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:16:00,828 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 04:16:00,828 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:16:00,828 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 04:16:00,828 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:16:00,828 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:16:00,829 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:16:00,829 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:16:00,829 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:16:00,829 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:16:00,829 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:16:00,832 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:16:00,832 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:16:00,832 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:16:00,833 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:16:00,833 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:16:00,833 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:16:00,833 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E 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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 60a477b5dcc7be77af17ce3cc379f1876781ed95f896fb2ca2dbb7ba91ecb849 [2024-11-14 04:16:01,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:16:01,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:16:01,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:16:01,232 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:16:01,232 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:16:01,234 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i Unable to find full path for "g++" [2024-11-14 04:16:03,668 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:16:04,063 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:16:04,064 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i [2024-11-14 04:16:04,080 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/data/f093a5792/4aed22d8db4248188115987fd50c6d4a/FLAGfd355f172 [2024-11-14 04:16:04,101 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/data/f093a5792/4aed22d8db4248188115987fd50c6d4a [2024-11-14 04:16:04,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:16:04,106 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:16:04,108 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:16:04,108 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:16:04,114 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:16:04,116 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:16:04" (1/1) ... [2024-11-14 04:16:04,117 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45c917fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:04, skipping insertion in model container [2024-11-14 04:16:04,117 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:16:04" (1/1) ... [2024-11-14 04:16:04,154 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:16:04,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:16:04,684 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:16:04,779 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:16:04,828 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:16:04,829 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:04 WrapperNode [2024-11-14 04:16:04,830 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:16:04,832 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:16:04,832 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:16:04,833 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:16:04,842 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:04" (1/1) ... [2024-11-14 04:16:04,864 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:04" (1/1) ... [2024-11-14 04:16:04,898 INFO L138 Inliner]: procedures = 126, calls = 23, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 121 [2024-11-14 04:16:04,899 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:16:04,903 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:16:04,903 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:16:04,903 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:16:04,915 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:04" (1/1) ... [2024-11-14 04:16:04,916 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:04" (1/1) ... [2024-11-14 04:16:04,924 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:04" (1/1) ... [2024-11-14 04:16:04,924 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:04" (1/1) ... [2024-11-14 04:16:04,941 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:04" (1/1) ... [2024-11-14 04:16:04,951 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:04" (1/1) ... [2024-11-14 04:16:04,952 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:04" (1/1) ... [2024-11-14 04:16:04,954 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:04" (1/1) ... [2024-11-14 04:16:04,957 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:16:04,958 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:16:04,958 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:16:04,958 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:16:04,960 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:04" (1/1) ... [2024-11-14 04:16:04,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:16:04,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:05,003 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:16:05,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:16:05,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 04:16:05,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 04:16:05,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-14 04:16:05,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:16:05,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-14 04:16:05,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-14 04:16:05,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 04:16:05,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:16:05,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:16:05,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:16:05,237 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:16:05,240 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:16:05,673 INFO L? ?]: Removed 81 outVars from TransFormulas that were not future-live. [2024-11-14 04:16:05,673 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:16:05,800 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:16:05,802 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-14 04:16:05,803 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:16:05 BoogieIcfgContainer [2024-11-14 04:16:05,804 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:16:05,811 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:16:05,811 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:16:05,820 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:16:05,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:16:04" (1/3) ... [2024-11-14 04:16:05,822 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f17e2cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:16:05, skipping insertion in model container [2024-11-14 04:16:05,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:04" (2/3) ... [2024-11-14 04:16:05,823 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f17e2cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:16:05, skipping insertion in model container [2024-11-14 04:16:05,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:16:05" (3/3) ... [2024-11-14 04:16:05,826 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_update_all_reverse.i [2024-11-14 04:16:05,850 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:16:05,854 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG sll2n_update_all_reverse.i that has 1 procedures, 47 locations, 1 initial locations, 6 loop locations, and 21 error locations. [2024-11-14 04:16:05,906 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:16:05,921 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=None, 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;@2b3a720a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:16:05,921 INFO L334 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2024-11-14 04:16:05,926 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 25 states have (on average 2.2) internal successors, (55), 46 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) [2024-11-14 04:16:05,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 04:16:05,934 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:05,935 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 04:16:05,935 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:16:05,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:05,942 INFO L85 PathProgramCache]: Analyzing trace with hash 5372505, now seen corresponding path program 1 times [2024-11-14 04:16:05,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:05,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986849324] [2024-11-14 04:16:05,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:05,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:06,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:06,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986849324] [2024-11-14 04:16:06,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986849324] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:06,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:06,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:16:06,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831591472] [2024-11-14 04:16:06,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:06,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:16:06,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:06,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:16:06,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:16:06,374 INFO L87 Difference]: Start difference. First operand has 47 states, 25 states have (on average 2.2) internal successors, (55), 46 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) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2024-11-14 04:16:06,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:06,500 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2024-11-14 04:16:06,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:16:06,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2024-11-14 04:16:06,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:06,511 INFO L225 Difference]: With dead ends: 44 [2024-11-14 04:16:06,511 INFO L226 Difference]: Without dead ends: 42 [2024-11-14 04:16:06,513 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 [2024-11-14 04:16:06,516 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:06,517 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:06,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-14 04:16:06,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-14 04:16:06,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:06,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2024-11-14 04:16:06,566 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 4 [2024-11-14 04:16:06,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:06,567 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2024-11-14 04:16:06,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2024-11-14 04:16:06,569 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2024-11-14 04:16:06,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 04:16:06,569 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:06,569 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 04:16:06,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:16:06,570 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:16:06,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:06,571 INFO L85 PathProgramCache]: Analyzing trace with hash 5372506, now seen corresponding path program 1 times [2024-11-14 04:16:06,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:06,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255850907] [2024-11-14 04:16:06,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:06,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:06,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:06,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255850907] [2024-11-14 04:16:06,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255850907] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:06,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:06,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:16:06,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537118189] [2024-11-14 04:16:06,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:06,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:16:06,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:06,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:16:06,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:16:06,740 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2024-11-14 04:16:06,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:06,826 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2024-11-14 04:16:06,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:16:06,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2024-11-14 04:16:06,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:06,828 INFO L225 Difference]: With dead ends: 40 [2024-11-14 04:16:06,828 INFO L226 Difference]: Without dead ends: 40 [2024-11-14 04:16:06,828 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 [2024-11-14 04:16:06,829 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:06,830 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:06,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-14 04:16:06,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-14 04:16:06,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 39 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) [2024-11-14 04:16:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2024-11-14 04:16:06,836 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 4 [2024-11-14 04:16:06,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:06,837 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2024-11-14 04:16:06,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2024-11-14 04:16:06,837 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2024-11-14 04:16:06,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 04:16:06,839 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:06,839 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 04:16:06,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:16:06,840 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:16:06,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:06,842 INFO L85 PathProgramCache]: Analyzing trace with hash 171256275, now seen corresponding path program 1 times [2024-11-14 04:16:06,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:06,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579823150] [2024-11-14 04:16:06,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:06,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:06,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:06,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579823150] [2024-11-14 04:16:06,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579823150] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:06,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:06,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:16:06,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150870385] [2024-11-14 04:16:06,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:06,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:16:06,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:06,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:16:06,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:16:06,948 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2024-11-14 04:16:07,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:07,024 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2024-11-14 04:16:07,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:16:07,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2024-11-14 04:16:07,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:07,027 INFO L225 Difference]: With dead ends: 47 [2024-11-14 04:16:07,027 INFO L226 Difference]: Without dead ends: 47 [2024-11-14 04:16:07,027 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 [2024-11-14 04:16:07,029 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:07,033 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 58 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:07,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-14 04:16:07,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2024-11-14 04:16:07,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 40 states have internal predecessors, (46), 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) [2024-11-14 04:16:07,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2024-11-14 04:16:07,041 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 5 [2024-11-14 04:16:07,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:07,041 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2024-11-14 04:16:07,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2024-11-14 04:16:07,041 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2024-11-14 04:16:07,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 04:16:07,041 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:07,042 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 04:16:07,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 04:16:07,042 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:16:07,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:07,042 INFO L85 PathProgramCache]: Analyzing trace with hash 868013943, now seen corresponding path program 1 times [2024-11-14 04:16:07,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:07,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990486587] [2024-11-14 04:16:07,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:07,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:07,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:07,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990486587] [2024-11-14 04:16:07,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990486587] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:07,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:07,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:16:07,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997767670] [2024-11-14 04:16:07,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:07,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:16:07,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:07,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:16:07,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:16:07,128 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2024-11-14 04:16:07,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:07,238 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2024-11-14 04:16:07,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:16:07,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2024-11-14 04:16:07,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:07,239 INFO L225 Difference]: With dead ends: 40 [2024-11-14 04:16:07,239 INFO L226 Difference]: Without dead ends: 40 [2024-11-14 04:16:07,240 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:16:07,240 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:07,241 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 60 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:07,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-14 04:16:07,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-14 04:16:07,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.875) internal successors, (45), 39 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) [2024-11-14 04:16:07,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2024-11-14 04:16:07,245 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 6 [2024-11-14 04:16:07,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:07,245 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2024-11-14 04:16:07,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2024-11-14 04:16:07,245 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2024-11-14 04:16:07,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 04:16:07,246 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:07,246 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 04:16:07,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 04:16:07,246 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:16:07,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:07,246 INFO L85 PathProgramCache]: Analyzing trace with hash 868013944, now seen corresponding path program 1 times [2024-11-14 04:16:07,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:07,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129693737] [2024-11-14 04:16:07,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:07,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:07,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:07,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129693737] [2024-11-14 04:16:07,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129693737] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:07,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:07,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:16:07,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342432271] [2024-11-14 04:16:07,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:07,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:16:07,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:07,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:16:07,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:16:07,405 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2024-11-14 04:16:07,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:07,486 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2024-11-14 04:16:07,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:16:07,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2024-11-14 04:16:07,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:07,488 INFO L225 Difference]: With dead ends: 39 [2024-11-14 04:16:07,488 INFO L226 Difference]: Without dead ends: 39 [2024-11-14 04:16:07,488 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:16:07,490 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:07,491 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:07,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-14 04:16:07,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-14 04:16:07,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 38 states have internal predecessors, (44), 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) [2024-11-14 04:16:07,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2024-11-14 04:16:07,498 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 6 [2024-11-14 04:16:07,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:07,498 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2024-11-14 04:16:07,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2024-11-14 04:16:07,498 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2024-11-14 04:16:07,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 04:16:07,499 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:07,499 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:07,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 04:16:07,499 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:16:07,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:07,504 INFO L85 PathProgramCache]: Analyzing trace with hash -649955180, now seen corresponding path program 1 times [2024-11-14 04:16:07,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:07,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179168619] [2024-11-14 04:16:07,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:07,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:07,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:07,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179168619] [2024-11-14 04:16:07,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179168619] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:07,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739814009] [2024-11-14 04:16:07,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:07,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:07,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:07,663 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:07,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:16:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:07,773 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:16:07,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:07,828 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:07,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739814009] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:16:07,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2008997584] [2024-11-14 04:16:07,902 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 04:16:07,902 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:16:07,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:16:07,914 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:16:07,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:16:09,501 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:16:10,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2008997584] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:10,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:16:10,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 10 [2024-11-14 04:16:10,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229783935] [2024-11-14 04:16:10,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:10,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 04:16:10,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:10,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 04:16:10,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=79, Unknown=1, NotChecked=0, Total=110 [2024-11-14 04:16:10,352 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 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) [2024-11-14 04:16:10,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:10,677 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2024-11-14 04:16:10,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 04:16:10,678 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 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 [2024-11-14 04:16:10,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:10,680 INFO L225 Difference]: With dead ends: 49 [2024-11-14 04:16:10,681 INFO L226 Difference]: Without dead ends: 49 [2024-11-14 04:16:10,681 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=79, Unknown=1, NotChecked=0, Total=110 [2024-11-14 04:16:10,682 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:10,682 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 81 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 2 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:16:10,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-14 04:16:10,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2024-11-14 04:16:10,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 40 states have internal predecessors, (46), 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) [2024-11-14 04:16:10,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2024-11-14 04:16:10,693 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 10 [2024-11-14 04:16:10,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:10,693 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2024-11-14 04:16:10,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 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) [2024-11-14 04:16:10,693 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2024-11-14 04:16:10,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 04:16:10,694 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:10,694 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:10,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:16:10,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 04:16:10,898 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:16:10,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:10,899 INFO L85 PathProgramCache]: Analyzing trace with hash -649958628, now seen corresponding path program 1 times [2024-11-14 04:16:10,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:10,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509959168] [2024-11-14 04:16:10,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:10,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:10,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:10,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509959168] [2024-11-14 04:16:10,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509959168] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:10,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24366100] [2024-11-14 04:16:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:10,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:10,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:10,994 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:11,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:16:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:11,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:16:11,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:11,171 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:11,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:11,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24366100] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:16:11,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [541206056] [2024-11-14 04:16:11,206 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 04:16:11,208 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:16:11,209 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:16:11,209 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:16:11,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:16:11,969 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:16:12,514 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '693#(and (not (= (select |#valid| |ULTIMATE.start_main_~s~0#1.base|) 1)) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_sll_update_at_~index#1| 1) (= 3 |ULTIMATE.start_sll_update_at_~data#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start_sll_update_at_~head#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-14 04:16:12,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:16:12,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:16:12,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2024-11-14 04:16:12,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181882730] [2024-11-14 04:16:12,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:16:12,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:16:12,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:12,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:16:12,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-14 04:16:12,517 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:12,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:12,578 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2024-11-14 04:16:12,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:16:12,579 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-14 04:16:12,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:12,579 INFO L225 Difference]: With dead ends: 46 [2024-11-14 04:16:12,579 INFO L226 Difference]: Without dead ends: 46 [2024-11-14 04:16:12,580 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-14 04:16:12,581 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:12,581 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 54 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:12,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-14 04:16:12,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-14 04:16:12,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 45 states have internal predecessors, (51), 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) [2024-11-14 04:16:12,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2024-11-14 04:16:12,586 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 10 [2024-11-14 04:16:12,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:12,586 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2024-11-14 04:16:12,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:12,587 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2024-11-14 04:16:12,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 04:16:12,587 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:12,587 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-14 04:16:12,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 04:16:12,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:12,792 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:16:12,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:12,793 INFO L85 PathProgramCache]: Analyzing trace with hash -844288773, now seen corresponding path program 2 times [2024-11-14 04:16:12,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:12,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965842231] [2024-11-14 04:16:12,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:12,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:16:12,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:12,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965842231] [2024-11-14 04:16:12,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965842231] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:12,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:12,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:16:12,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016404670] [2024-11-14 04:16:12,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:12,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:16:12,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:12,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:16:12,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:16:12,997 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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) [2024-11-14 04:16:13,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:13,153 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2024-11-14 04:16:13,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:16:13,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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 15 [2024-11-14 04:16:13,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:13,154 INFO L225 Difference]: With dead ends: 49 [2024-11-14 04:16:13,154 INFO L226 Difference]: Without dead ends: 49 [2024-11-14 04:16:13,155 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:16:13,156 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:13,157 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 60 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:13,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-14 04:16:13,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-14 04:16:13,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 48 states have internal predecessors, (57), 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) [2024-11-14 04:16:13,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2024-11-14 04:16:13,161 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 15 [2024-11-14 04:16:13,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:13,161 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2024-11-14 04:16:13,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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) [2024-11-14 04:16:13,161 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2024-11-14 04:16:13,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 04:16:13,162 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:13,162 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-14 04:16:13,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 04:16:13,162 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:16:13,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:13,166 INFO L85 PathProgramCache]: Analyzing trace with hash -844288772, now seen corresponding path program 1 times [2024-11-14 04:16:13,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:13,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686610875] [2024-11-14 04:16:13,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:13,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:13,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:16:13,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:13,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686610875] [2024-11-14 04:16:13,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686610875] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:13,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:13,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 04:16:13,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890349599] [2024-11-14 04:16:13,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:13,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:16:13,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:13,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:16:13,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:16:13,612 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 7 states, 6 states have (on average 2.5) 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) [2024-11-14 04:16:13,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:13,864 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2024-11-14 04:16:13,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 04:16:13,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) 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 15 [2024-11-14 04:16:13,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:13,866 INFO L225 Difference]: With dead ends: 49 [2024-11-14 04:16:13,866 INFO L226 Difference]: Without dead ends: 49 [2024-11-14 04:16:13,866 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-14 04:16:13,867 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:13,867 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 99 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:16:13,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-14 04:16:13,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-14 04:16:13,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 48 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) [2024-11-14 04:16:13,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2024-11-14 04:16:13,872 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 15 [2024-11-14 04:16:13,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:13,872 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2024-11-14 04:16:13,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) 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) [2024-11-14 04:16:13,873 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2024-11-14 04:16:13,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 04:16:13,873 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:13,873 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:13,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 04:16:13,874 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:16:13,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:13,874 INFO L85 PathProgramCache]: Analyzing trace with hash 387402578, now seen corresponding path program 1 times [2024-11-14 04:16:13,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:13,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248011040] [2024-11-14 04:16:13,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:13,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:14,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:14,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248011040] [2024-11-14 04:16:14,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248011040] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:14,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150179587] [2024-11-14 04:16:14,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:14,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:14,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:14,806 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:14,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:16:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:14,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-14 04:16:14,970 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:15,029 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-14 04:16:15,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-14 04:16:15,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-14 04:16:15,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2024-11-14 04:16:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:15,310 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:15,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:15,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150179587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:16:15,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [308038087] [2024-11-14 04:16:15,584 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 04:16:15,584 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:16:15,584 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:16:15,585 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:16:15,585 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:16:16,228 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:16:17,232 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1125#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_sll_update_at_~head#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 4)) (<= 8 (select |#length| |ULTIMATE.start_main_~s~0#1.base|)) (= 3 |ULTIMATE.start_sll_update_at_~data#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select |#valid| |ULTIMATE.start_main_~s~0#1.base|) 1) (= |ULTIMATE.start_main_~len~0#1| 2) (not (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 4)) 1)) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-14 04:16:17,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:16:17,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:16:17,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2024-11-14 04:16:17,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114158644] [2024-11-14 04:16:17,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:16:17,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 04:16:17,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:17,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 04:16:17,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=779, Unknown=1, NotChecked=0, Total=870 [2024-11-14 04:16:17,235 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:18,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:18,072 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2024-11-14 04:16:18,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 04:16:18,073 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-14 04:16:18,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:18,075 INFO L225 Difference]: With dead ends: 62 [2024-11-14 04:16:18,076 INFO L226 Difference]: Without dead ends: 62 [2024-11-14 04:16:18,077 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=155, Invalid=1176, Unknown=1, NotChecked=0, Total=1332 [2024-11-14 04:16:18,078 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:18,078 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 221 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 04:16:18,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-14 04:16:18,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2024-11-14 04:16:18,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.631578947368421) internal successors, (62), 52 states have internal predecessors, (62), 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) [2024-11-14 04:16:18,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2024-11-14 04:16:18,085 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 17 [2024-11-14 04:16:18,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:18,085 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2024-11-14 04:16:18,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:18,086 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2024-11-14 04:16:18,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 04:16:18,086 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:18,087 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:18,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 04:16:18,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:18,291 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:16:18,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:18,292 INFO L85 PathProgramCache]: Analyzing trace with hash 387402579, now seen corresponding path program 1 times [2024-11-14 04:16:18,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:18,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264965164] [2024-11-14 04:16:18,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:18,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:19,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:19,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:19,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264965164] [2024-11-14 04:16:19,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264965164] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:19,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206202053] [2024-11-14 04:16:19,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:19,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:19,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:19,321 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:19,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:16:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:19,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-14 04:16:19,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:19,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-14 04:16:19,609 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 04:16:19,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-14 04:16:19,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-14 04:16:19,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:16:19,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-14 04:16:19,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2024-11-14 04:16:19,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-14 04:16:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:19,975 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:20,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:16:20,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2024-11-14 04:16:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:20,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206202053] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:16:20,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1290978224] [2024-11-14 04:16:20,670 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 04:16:20,671 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:16:20,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:16:20,672 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:16:20,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:16:21,439 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:16:22,740 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1387#(and (<= 1 |#StackHeapBarrier|) (<= 8 (select |#length| |ULTIMATE.start_main_~s~0#1.base|)) (= 3 |ULTIMATE.start_sll_update_at_~data#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (or (< (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 4)) (+ 4 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 4))) (< (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 4) 0)) (= (select |#valid| |ULTIMATE.start_main_~s~0#1.base|) 1) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-14 04:16:22,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:16:22,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:16:22,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2024-11-14 04:16:22,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367534583] [2024-11-14 04:16:22,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:16:22,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-14 04:16:22,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:22,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-14 04:16:22,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1218, Unknown=1, NotChecked=0, Total=1332 [2024-11-14 04:16:22,743 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 28 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:24,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:24,079 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2024-11-14 04:16:24,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 04:16:24,080 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-14 04:16:24,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:24,081 INFO L225 Difference]: With dead ends: 83 [2024-11-14 04:16:24,082 INFO L226 Difference]: Without dead ends: 83 [2024-11-14 04:16:24,084 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=210, Invalid=1859, Unknown=1, NotChecked=0, Total=2070 [2024-11-14 04:16:24,085 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 63 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:24,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 348 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 04:16:24,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-14 04:16:24,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2024-11-14 04:16:24,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 43 states have (on average 1.627906976744186) internal successors, (70), 57 states have internal predecessors, (70), 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) [2024-11-14 04:16:24,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2024-11-14 04:16:24,096 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 17 [2024-11-14 04:16:24,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:24,096 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2024-11-14 04:16:24,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2024-11-14 04:16:24,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 04:16:24,097 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:24,097 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-14 04:16:24,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 04:16:24,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 04:16:24,298 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:16:24,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:24,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1371496335, now seen corresponding path program 2 times [2024-11-14 04:16:24,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:24,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514356469] [2024-11-14 04:16:24,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:24,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 04:16:24,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:24,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514356469] [2024-11-14 04:16:24,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514356469] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:24,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:24,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:16:24,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403622609] [2024-11-14 04:16:24,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:24,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:16:24,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:24,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:16:24,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:16:24,445 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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) [2024-11-14 04:16:24,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:24,569 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2024-11-14 04:16:24,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:16:24,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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 19 [2024-11-14 04:16:24,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:24,571 INFO L225 Difference]: With dead ends: 71 [2024-11-14 04:16:24,571 INFO L226 Difference]: Without dead ends: 71 [2024-11-14 04:16:24,571 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-14 04:16:24,572 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 71 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:24,572 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 97 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:24,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-14 04:16:24,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2024-11-14 04:16:24,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 58 states have internal predecessors, (70), 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) [2024-11-14 04:16:24,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2024-11-14 04:16:24,581 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 19 [2024-11-14 04:16:24,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:24,581 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2024-11-14 04:16:24,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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) [2024-11-14 04:16:24,582 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2024-11-14 04:16:24,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 04:16:24,582 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:24,582 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:24,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-14 04:16:24,583 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:16:24,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:24,583 INFO L85 PathProgramCache]: Analyzing trace with hash -565452881, now seen corresponding path program 1 times [2024-11-14 04:16:24,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:24,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138405503] [2024-11-14 04:16:24,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:24,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:24,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:16:24,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:24,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138405503] [2024-11-14 04:16:24,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138405503] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:24,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026362485] [2024-11-14 04:16:24,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:24,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:24,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:24,715 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:24,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:16:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:24,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:16:24,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:16:24,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:16:25,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026362485] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:16:25,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [514145711] [2024-11-14 04:16:25,019 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 04:16:25,019 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:16:25,020 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:16:25,020 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:16:25,020 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:16:26,703 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:16:43,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [514145711] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:43,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:16:43,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [4, 4, 4] total 16 [2024-11-14 04:16:43,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884015251] [2024-11-14 04:16:43,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:43,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 04:16:43,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:43,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 04:16:43,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=195, Unknown=3, NotChecked=0, Total=272 [2024-11-14 04:16:43,868 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:46,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:16:48,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:16:50,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:50,553 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2024-11-14 04:16:50,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 04:16:50,554 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-14 04:16:50,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:50,554 INFO L225 Difference]: With dead ends: 71 [2024-11-14 04:16:50,554 INFO L226 Difference]: Without dead ends: 71 [2024-11-14 04:16:50,555 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=110, Invalid=267, Unknown=3, NotChecked=0, Total=380 [2024-11-14 04:16:50,555 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 7 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:50,556 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 72 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 270 Invalid, 3 Unknown, 0 Unchecked, 6.5s Time] [2024-11-14 04:16:50,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-14 04:16:50,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2024-11-14 04:16:50,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2024-11-14 04:16:50,560 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 21 [2024-11-14 04:16:50,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:50,560 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2024-11-14 04:16:50,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:50,561 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2024-11-14 04:16:50,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 04:16:50,561 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:50,561 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:50,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 04:16:50,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 04:16:50,762 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:16:50,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:50,763 INFO L85 PathProgramCache]: Analyzing trace with hash -565455306, now seen corresponding path program 1 times [2024-11-14 04:16:50,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:50,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202998270] [2024-11-14 04:16:50,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:50,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:16:50,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:50,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202998270] [2024-11-14 04:16:50,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202998270] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:50,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939529100] [2024-11-14 04:16:50,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:50,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:50,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:50,886 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:50,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:16:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:51,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:16:51,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:16:51,145 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:51,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:16:51,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939529100] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:16:51,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1918980294] [2024-11-14 04:16:51,219 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 04:16:51,220 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:16:51,221 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:16:51,221 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:16:51,221 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:16:52,810 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:17:10,815 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2094#(and (not (= (select |#valid| |ULTIMATE.start_main_~s~0#1.base|) 1)) (= |ULTIMATE.start_main_~i~0#1| 1) (= 3 |ULTIMATE.start_main_~expected~0#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_get_data_at_~head#1.offset| 0) (= |ULTIMATE.start_sll_get_data_at_~index#1| 1) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-14 04:17:10,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:17:10,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:17:10,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-14 04:17:10,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922996552] [2024-11-14 04:17:10,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:17:10,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:17:10,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:10,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:17:10,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=198, Unknown=2, NotChecked=0, Total=272 [2024-11-14 04:17:10,818 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:10,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:10,984 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2024-11-14 04:17:10,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:17:10,984 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-14 04:17:10,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:10,985 INFO L225 Difference]: With dead ends: 70 [2024-11-14 04:17:10,985 INFO L226 Difference]: Without dead ends: 70 [2024-11-14 04:17:10,985 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=91, Invalid=249, Unknown=2, NotChecked=0, Total=342 [2024-11-14 04:17:10,986 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 97 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:10,986 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 59 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:17:10,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-14 04:17:10,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2024-11-14 04:17:10,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.58) internal successors, (79), 62 states have internal predecessors, (79), 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) [2024-11-14 04:17:10,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2024-11-14 04:17:10,997 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 21 [2024-11-14 04:17:10,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:10,997 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2024-11-14 04:17:10,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:10,998 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2024-11-14 04:17:10,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 04:17:10,998 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:10,998 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2024-11-14 04:17:11,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-14 04:17:11,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 04:17:11,200 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:17:11,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:11,200 INFO L85 PathProgramCache]: Analyzing trace with hash -461643336, now seen corresponding path program 1 times [2024-11-14 04:17:11,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:11,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885054839] [2024-11-14 04:17:11,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:11,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:11,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:17:11,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:11,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885054839] [2024-11-14 04:17:11,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885054839] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:11,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874791740] [2024-11-14 04:17:11,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:11,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:11,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:11,358 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:11,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:17:11,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:11,528 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 04:17:11,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:17:11,605 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:17:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:17:11,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874791740] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:17:11,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1791579612] [2024-11-14 04:17:11,691 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 04:17:11,692 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:17:11,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:17:11,692 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:17:11,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:17:12,525 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:17:18,999 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2375#(exists ((|v_ULTIMATE.start_sll_update_at_~head#1.base_79| Int)) (not (= (select |#valid| |v_ULTIMATE.start_sll_update_at_~head#1.base_79|) 1)))' at error location [2024-11-14 04:17:18,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:17:18,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:17:18,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-11-14 04:17:19,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961879732] [2024-11-14 04:17:19,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:17:19,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 04:17:19,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:19,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 04:17:19,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=163, Unknown=4, NotChecked=0, Total=210 [2024-11-14 04:17:19,001 INFO L87 Difference]: Start difference. First operand 63 states and 79 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:19,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:19,157 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2024-11-14 04:17:19,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:17:19,157 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-14 04:17:19,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:19,158 INFO L225 Difference]: With dead ends: 59 [2024-11-14 04:17:19,158 INFO L226 Difference]: Without dead ends: 59 [2024-11-14 04:17:19,159 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=63, Invalid=239, Unknown=4, NotChecked=0, Total=306 [2024-11-14 04:17:19,159 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 136 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:19,159 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 96 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:17:19,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-14 04:17:19,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2024-11-14 04:17:19,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 51 states have internal predecessors, (62), 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) [2024-11-14 04:17:19,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2024-11-14 04:17:19,164 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 22 [2024-11-14 04:17:19,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:19,165 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2024-11-14 04:17:19,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:19,165 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2024-11-14 04:17:19,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-14 04:17:19,169 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:19,170 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:19,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 04:17:19,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 04:17:19,370 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:17:19,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:19,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1924915645, now seen corresponding path program 2 times [2024-11-14 04:17:19,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:19,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149330097] [2024-11-14 04:17:19,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:19,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:17:19,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:19,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149330097] [2024-11-14 04:17:19,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149330097] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:19,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113161608] [2024-11-14 04:17:19,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:17:19,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:19,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:19,534 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:19,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:17:19,708 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 04:17:19,708 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:17:19,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 04:17:19,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:17:19,771 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:17:19,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113161608] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:17:19,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:17:19,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2024-11-14 04:17:19,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062265413] [2024-11-14 04:17:19,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:17:19,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:17:19,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:19,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:17:19,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:17:19,774 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:19,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:19,960 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2024-11-14 04:17:19,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:17:19,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-14 04:17:19,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:19,961 INFO L225 Difference]: With dead ends: 56 [2024-11-14 04:17:19,961 INFO L226 Difference]: Without dead ends: 56 [2024-11-14 04:17:19,962 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:17:19,962 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 20 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:19,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 54 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:17:19,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-14 04:17:19,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-11-14 04:17:19,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 55 states have internal predecessors, (70), 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) [2024-11-14 04:17:19,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2024-11-14 04:17:19,971 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 24 [2024-11-14 04:17:19,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:19,971 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2024-11-14 04:17:19,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:19,971 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2024-11-14 04:17:19,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-14 04:17:19,972 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:19,972 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:19,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 04:17:20,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 04:17:20,173 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:17:20,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:20,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1924915646, now seen corresponding path program 1 times [2024-11-14 04:17:20,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:20,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450591784] [2024-11-14 04:17:20,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:20,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:17:20,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:20,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450591784] [2024-11-14 04:17:20,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450591784] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:17:20,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:17:20,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 04:17:20,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737402565] [2024-11-14 04:17:20,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:17:20,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:17:20,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:20,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:17:20,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:17:20,504 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 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) [2024-11-14 04:17:20,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:20,790 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2024-11-14 04:17:20,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 04:17:20,791 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 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 24 [2024-11-14 04:17:20,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:20,791 INFO L225 Difference]: With dead ends: 56 [2024-11-14 04:17:20,792 INFO L226 Difference]: Without dead ends: 56 [2024-11-14 04:17:20,792 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-14 04:17:20,792 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:20,793 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 89 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:17:20,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-14 04:17:20,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-11-14 04:17:20,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 45 states have (on average 1.488888888888889) internal successors, (67), 55 states have internal predecessors, (67), 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) [2024-11-14 04:17:20,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2024-11-14 04:17:20,796 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 24 [2024-11-14 04:17:20,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:20,796 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2024-11-14 04:17:20,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 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) [2024-11-14 04:17:20,797 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2024-11-14 04:17:20,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 04:17:20,797 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:20,797 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:20,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-14 04:17:20,798 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:17:20,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:20,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1286905034, now seen corresponding path program 1 times [2024-11-14 04:17:20,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:20,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352687778] [2024-11-14 04:17:20,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:20,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:21,873 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:17:21,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:21,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352687778] [2024-11-14 04:17:21,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352687778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:21,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234228288] [2024-11-14 04:17:21,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:21,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:21,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:21,875 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:21,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:17:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:22,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-14 04:17:22,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:22,124 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-14 04:17:22,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-14 04:17:22,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-14 04:17:22,486 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2024-11-14 04:17:22,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2024-11-14 04:17:22,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:17:22,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2024-11-14 04:17:22,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2024-11-14 04:17:22,687 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:17:22,687 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:17:22,794 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_938 (Array Int Int))) (or (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_938) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) 1) (not (= v_ArrVal_938 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_938 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))))) is different from false [2024-11-14 04:17:22,896 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_937 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_937) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) 1)) is different from false [2024-11-14 04:17:22,910 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_937 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4)) v_ArrVal_937) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) 1)) is different from false [2024-11-14 04:17:23,099 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:17:23,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2024-11-14 04:17:23,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2024-11-14 04:17:23,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2024-11-14 04:17:23,449 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-14 04:17:23,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2024-11-14 04:17:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-14 04:17:23,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234228288] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:17:23,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1304922739] [2024-11-14 04:17:23,456 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:17:23,457 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:17:23,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:17:23,457 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:17:23,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:17:24,598 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:17:43,611 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2995#(exists ((|v_ULTIMATE.start_sll_get_data_at_~head#1.base_31| Int)) (and (or (and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~expected~0#1| 1) (= |v_ULTIMATE.start_sll_get_data_at_~head#1.base_31| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_main_~len~0#1| 1) (= |ULTIMATE.start_sll_get_data_at_~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|)) (exists ((|v_ULTIMATE.start_sll_get_data_at_~head#1.base_30| Int) (|v_ULTIMATE.start_sll_get_data_at_~head#1.offset_26| Int)) (and (<= 0 (+ |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_26| 4)) (= (select |#valid| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_30|) 1) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_30|) (+ |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_26| 4)) |v_ULTIMATE.start_sll_get_data_at_~head#1.base_31|) (= |ULTIMATE.start_sll_get_data_at_~head#1.offset| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_30|) (+ |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_26| 4))) (<= (+ |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_26| 8) (select |#length| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_30|))))) (not (= (select |#valid| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_31|) 1))))' at error location [2024-11-14 04:17:43,611 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:17:43,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:17:43,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 31 [2024-11-14 04:17:43,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730777202] [2024-11-14 04:17:43,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:17:43,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-14 04:17:43,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:43,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-14 04:17:43,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1428, Unknown=22, NotChecked=234, Total=1806 [2024-11-14 04:17:43,613 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 32 states have internal predecessors, (67), 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) [2024-11-14 04:17:44,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:44,955 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2024-11-14 04:17:44,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 04:17:44,955 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 32 states have internal predecessors, (67), 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 26 [2024-11-14 04:17:44,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:44,956 INFO L225 Difference]: With dead ends: 66 [2024-11-14 04:17:44,956 INFO L226 Difference]: Without dead ends: 66 [2024-11-14 04:17:44,957 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=218, Invalid=2220, Unknown=24, NotChecked=294, Total=2756 [2024-11-14 04:17:44,957 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 99 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:44,958 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 216 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 555 Invalid, 0 Unknown, 159 Unchecked, 0.7s Time] [2024-11-14 04:17:44,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-14 04:17:44,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2024-11-14 04:17:44,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 61 states have internal predecessors, (79), 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) [2024-11-14 04:17:44,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2024-11-14 04:17:44,961 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 26 [2024-11-14 04:17:44,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:44,961 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2024-11-14 04:17:44,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 32 states have internal predecessors, (67), 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) [2024-11-14 04:17:44,962 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2024-11-14 04:17:44,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 04:17:44,963 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:44,963 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:44,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 04:17:45,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 04:17:45,163 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:17:45,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:45,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1286905033, now seen corresponding path program 1 times [2024-11-14 04:17:45,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:45,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262453869] [2024-11-14 04:17:45,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:45,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:17:46,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:46,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262453869] [2024-11-14 04:17:46,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262453869] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:46,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250131830] [2024-11-14 04:17:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:46,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:46,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:46,507 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:46,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:17:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:46,746 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-14 04:17:46,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:46,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-14 04:17:46,939 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 04:17:46,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-14 04:17:46,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-14 04:17:47,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:17:47,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-14 04:17:47,379 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2024-11-14 04:17:47,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 57 [2024-11-14 04:17:47,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2024-11-14 04:17:47,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:17:47,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2024-11-14 04:17:47,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:17:47,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-14 04:17:47,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2024-11-14 04:17:47,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-14 04:17:47,676 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:17:47,676 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:17:47,910 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) (.cse1 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|))) (and (forall ((v_ArrVal_1050 (Array Int Int))) (or (forall ((v_ArrVal_1049 (Array Int Int))) (or (not (= v_ArrVal_1049 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_1049 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))) (< (+ 3 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1050) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1049) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0))))) (not (= (store .cse1 |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_1050 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_1050)))) (forall ((v_ArrVal_1050 (Array Int Int))) (or (< 0 (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1050) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0) 1)) (not (= (store .cse1 |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_1050 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_1050)))))) is different from false [2024-11-14 04:17:48,136 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((v_ArrVal_1047 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1047) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0))) (forall ((v_ArrVal_1048 (Array Int Int)) (v_ArrVal_1047 (Array Int Int))) (<= (+ 4 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1047) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1048) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0)))))) is different from false [2024-11-14 04:17:48,171 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4))) (.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((v_ArrVal_1048 (Array Int Int)) (v_ArrVal_1047 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1047) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1048) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)))) (forall ((v_ArrVal_1047 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1047) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))))) is different from false [2024-11-14 04:17:48,201 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (and (forall ((v_ArrVal_1048 (Array Int Int)) (v_ArrVal_1047 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1047) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1048) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)))) (forall ((v_ArrVal_1047 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1047) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)))))) is different from false [2024-11-14 04:17:48,413 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:17:48,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2024-11-14 04:17:48,422 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:17:48,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2024-11-14 04:17:48,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 50 [2024-11-14 04:17:48,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 78 [2024-11-14 04:17:48,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-14 04:17:48,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:17:48,457 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:17:48,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2024-11-14 04:17:48,459 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:17:48,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-11-14 04:17:48,730 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:17:48,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 52 [2024-11-14 04:17:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2024-11-14 04:17:48,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250131830] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:17:48,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [733208083] [2024-11-14 04:17:48,935 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:17:48,936 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:17:48,936 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:17:48,936 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:17:48,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:17:50,151 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:18:22,454 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3346#(exists ((|v_ULTIMATE.start_sll_get_data_at_~head#1.offset_34| Int) (|v_ULTIMATE.start_sll_get_data_at_~head#1.base_39| Int)) (and (or (< |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_34| 0) (< (select |#length| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_39|) (+ |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_34| 4))) (or (exists ((|v_ULTIMATE.start_sll_get_data_at_~head#1.offset_33| Int) (|v_ULTIMATE.start_sll_get_data_at_~head#1.base_38| Int)) (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_38|) (+ |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_33| 4)) |v_ULTIMATE.start_sll_get_data_at_~head#1.base_39|) (= |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_34| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_38|) (+ |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_33| 4))) (<= (+ |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_33| 8) (select |#length| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_38|)) (= (select |#valid| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_38|) 1) (<= 0 (+ |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_33| 4)))) (and (= |ULTIMATE.start_main_~i~0#1| 0) (= |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_34| |ULTIMATE.start_main_~s~0#1.offset|) (= |ULTIMATE.start_main_~expected~0#1| 1) (= |v_ULTIMATE.start_sll_get_data_at_~head#1.base_39| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_main_~len~0#1| 1)))))' at error location [2024-11-14 04:18:22,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:18:22,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:18:22,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 39 [2024-11-14 04:18:22,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319786007] [2024-11-14 04:18:22,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:18:22,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-14 04:18:22,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:22,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-14 04:18:22,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2005, Unknown=23, NotChecked=372, Total=2550 [2024-11-14 04:18:22,457 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 40 states have internal predecessors, (76), 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) [2024-11-14 04:18:24,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:24,720 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2024-11-14 04:18:24,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 04:18:24,721 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 40 states have internal predecessors, (76), 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 26 [2024-11-14 04:18:24,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:24,721 INFO L225 Difference]: With dead ends: 66 [2024-11-14 04:18:24,721 INFO L226 Difference]: Without dead ends: 66 [2024-11-14 04:18:24,722 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 35.5s TimeCoverageRelationStatistics Valid=248, Invalid=2825, Unknown=23, NotChecked=444, Total=3540 [2024-11-14 04:18:24,723 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 74 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:24,723 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 339 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 672 Invalid, 0 Unknown, 193 Unchecked, 0.8s Time] [2024-11-14 04:18:24,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-14 04:18:24,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2024-11-14 04:18:24,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 50 states have (on average 1.48) internal successors, (74), 60 states have internal predecessors, (74), 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) [2024-11-14 04:18:24,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2024-11-14 04:18:24,726 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 26 [2024-11-14 04:18:24,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:24,727 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2024-11-14 04:18:24,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 40 states have internal predecessors, (76), 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) [2024-11-14 04:18:24,727 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2024-11-14 04:18:24,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 04:18:24,728 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:24,728 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:18:24,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-14 04:18:24,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:18:24,929 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:18:24,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:24,929 INFO L85 PathProgramCache]: Analyzing trace with hash 232577846, now seen corresponding path program 2 times [2024-11-14 04:18:24,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:24,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726408351] [2024-11-14 04:18:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:24,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 04:18:25,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:25,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726408351] [2024-11-14 04:18:25,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726408351] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:18:25,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:18:25,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:18:25,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771768338] [2024-11-14 04:18:25,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:18:25,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:18:25,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:25,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:18:25,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:18:25,080 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2024-11-14 04:18:25,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:25,204 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2024-11-14 04:18:25,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:18:25,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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 28 [2024-11-14 04:18:25,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:25,205 INFO L225 Difference]: With dead ends: 49 [2024-11-14 04:18:25,205 INFO L226 Difference]: Without dead ends: 49 [2024-11-14 04:18:25,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:18:25,206 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:25,207 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 61 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:18:25,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-14 04:18:25,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-14 04:18:25,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 48 states have internal predecessors, (54), 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) [2024-11-14 04:18:25,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2024-11-14 04:18:25,214 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 28 [2024-11-14 04:18:25,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:25,214 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2024-11-14 04:18:25,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2024-11-14 04:18:25,214 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2024-11-14 04:18:25,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-14 04:18:25,215 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:25,215 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:18:25,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-14 04:18:25,215 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:18:25,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:25,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1307782519, now seen corresponding path program 1 times [2024-11-14 04:18:25,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:25,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076883156] [2024-11-14 04:18:25,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:25,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:26,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:26,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076883156] [2024-11-14 04:18:26,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076883156] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:18:26,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032241742] [2024-11-14 04:18:26,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:26,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:18:26,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:18:26,973 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:18:26,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:18:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:27,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-14 04:18:27,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:18:27,234 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 04:18:27,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-14 04:18:27,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-14 04:18:27,622 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2024-11-14 04:18:27,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2024-11-14 04:18:27,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2024-11-14 04:18:27,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 23 [2024-11-14 04:18:27,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:18:27,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 27 [2024-11-14 04:18:27,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2024-11-14 04:18:27,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:18:27,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-11-14 04:18:27,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2024-11-14 04:18:27,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-14 04:18:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:18:28,031 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:18:28,208 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1213 (Array Int Int)) (v_ArrVal_1212 (Array Int Int)) (v_ArrVal_1211 (Array Int Int))) (or (not (= (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_1211 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_1211)) (= (* |c_ULTIMATE.start_main_~len~0#1| 2) (+ (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1212) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1213) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1211) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0))) 1)) (not (= (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_1213 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_1213)))) is different from false [2024-11-14 04:18:28,274 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_111| Int) (v_ArrVal_1212 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_111|) (= (+ (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_1212) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse0)) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse0))) 1) (* |c_ULTIMATE.start_main_~len~0#1| 2)))) is different from false [2024-11-14 04:18:28,290 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:18:28,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 41 [2024-11-14 04:18:28,310 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:18:28,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 86 [2024-11-14 04:18:28,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 20 [2024-11-14 04:18:28,504 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:18:28,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 43 [2024-11-14 04:18:28,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-14 04:18:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2024-11-14 04:18:28,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032241742] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:18:28,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1133719603] [2024-11-14 04:18:28,805 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 04:18:28,805 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:18:28,806 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:18:28,806 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:18:28,806 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:18:30,245 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:18:52,081 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3823#(and (<= (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 4)) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 4)) 2147483647) (<= 8 (select |#length| |ULTIMATE.start_main_~s~0#1.base|)) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 4)) 1) (<= (+ 4 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 4)) (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 4))) (<= 0 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 4)) (= (select |#valid| |ULTIMATE.start_main_~s~0#1.base|) 1) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 (+ (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 4)) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 4)) 2147483648)) (= |ULTIMATE.start_main_~s~0#1.offset| 0) (not (= (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 4)) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 4)) 3)))' at error location [2024-11-14 04:18:52,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:18:52,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:18:52,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 16] total 42 [2024-11-14 04:18:52,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555130920] [2024-11-14 04:18:52,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:18:52,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-14 04:18:52,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:52,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-14 04:18:52,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2638, Unknown=9, NotChecked=210, Total=3080 [2024-11-14 04:18:52,084 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 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) [2024-11-14 04:18:53,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:53,631 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2024-11-14 04:18:53,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 04:18:53,632 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 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 29 [2024-11-14 04:18:53,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:53,632 INFO L225 Difference]: With dead ends: 53 [2024-11-14 04:18:53,632 INFO L226 Difference]: Without dead ends: 53 [2024-11-14 04:18:53,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=365, Invalid=3794, Unknown=9, NotChecked=254, Total=4422 [2024-11-14 04:18:53,634 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 89 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:53,635 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 266 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 572 Invalid, 0 Unknown, 105 Unchecked, 0.7s Time] [2024-11-14 04:18:53,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-14 04:18:53,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2024-11-14 04:18:53,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 48 states have internal predecessors, (53), 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) [2024-11-14 04:18:53,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2024-11-14 04:18:53,638 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2024-11-14 04:18:53,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:53,638 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2024-11-14 04:18:53,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 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) [2024-11-14 04:18:53,639 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2024-11-14 04:18:53,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 04:18:53,639 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:53,639 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:18:53,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 04:18:53,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:18:53,840 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:18:53,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:53,841 INFO L85 PathProgramCache]: Analyzing trace with hash -682152758, now seen corresponding path program 1 times [2024-11-14 04:18:53,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:53,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243397985] [2024-11-14 04:18:53,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:53,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 04:18:54,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:54,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243397985] [2024-11-14 04:18:54,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243397985] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:18:54,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187455289] [2024-11-14 04:18:54,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:54,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:18:54,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:18:54,403 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:18:54,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:18:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:54,672 INFO L255 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-14 04:18:54,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:18:54,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-14 04:18:55,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-14 04:18:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 04:18:55,121 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:18:55,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-14 04:18:55,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 04:18:55,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187455289] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:18:55,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1689251739] [2024-11-14 04:18:55,303 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 04:18:55,303 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:18:55,304 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:18:55,304 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:18:55,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:18:57,031 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:19:20,311 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4175#(exists ((|v_ULTIMATE.start_sll_get_data_at_~head#1.offset_64| Int) (|v_ULTIMATE.start_sll_get_data_at_~head#1.base_69| Int) (|v_ULTIMATE.start_main_~expected~0#1_28| Int)) (and (<= (+ |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_64| 4) (select |#length| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_69|)) (<= (select (select |#memory_int| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_69|) |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_64|) 2147483647) (or (exists ((|v_ULTIMATE.start_sll_get_data_at_~head#1.offset_63| Int) (|v_ULTIMATE.start_sll_get_data_at_~head#1.base_68| Int)) (and (<= (+ |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_63| 8) (select |#length| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_68|)) (<= 0 (+ |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_63| 4)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_68|) (+ |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_63| 4)) |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_64|) (= (select |#valid| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_68|) 1) (= |v_ULTIMATE.start_sll_get_data_at_~head#1.base_69| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_68|) (+ |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_63| 4))))) (and (= |ULTIMATE.start_main_~i~0#1| 0) (= |v_ULTIMATE.start_sll_get_data_at_~head#1.base_69| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_main_~len~0#1| |v_ULTIMATE.start_main_~expected~0#1_28|) (= |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_64| |ULTIMATE.start_main_~s~0#1.offset|))) (<= 0 |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_64|) (= (select |#valid| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_69|) 1) (not (= (select (select |#memory_int| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_69|) |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_64|) |v_ULTIMATE.start_main_~expected~0#1_28|)) (<= 0 (+ (select (select |#memory_int| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_69|) |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_64|) 2147483648))))' at error location [2024-11-14 04:19:20,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:19:20,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:19:20,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2024-11-14 04:19:20,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063425719] [2024-11-14 04:19:20,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:19:20,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 04:19:20,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:20,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 04:19:20,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=960, Unknown=7, NotChecked=0, Total=1056 [2024-11-14 04:19:20,313 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 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) [2024-11-14 04:19:21,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:21,273 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2024-11-14 04:19:21,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 04:19:21,275 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-14 04:19:21,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:21,276 INFO L225 Difference]: With dead ends: 53 [2024-11-14 04:19:21,276 INFO L226 Difference]: Without dead ends: 53 [2024-11-14 04:19:21,277 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=176, Invalid=1457, Unknown=7, NotChecked=0, Total=1640 [2024-11-14 04:19:21,280 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:21,281 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 252 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:19:21,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-14 04:19:21,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2024-11-14 04:19:21,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.25) internal successors, (55), 50 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) [2024-11-14 04:19:21,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2024-11-14 04:19:21,284 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 33 [2024-11-14 04:19:21,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:21,284 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2024-11-14 04:19:21,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 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) [2024-11-14 04:19:21,284 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2024-11-14 04:19:21,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 04:19:21,285 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:21,285 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:19:21,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 04:19:21,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:21,485 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:19:21,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:21,486 INFO L85 PathProgramCache]: Analyzing trace with hash 326516688, now seen corresponding path program 1 times [2024-11-14 04:19:21,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:21,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776234517] [2024-11-14 04:19:21,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:21,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 04:19:21,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:21,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776234517] [2024-11-14 04:19:21,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776234517] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:19:21,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117312743] [2024-11-14 04:19:21,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:21,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:21,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:19:21,678 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:19:21,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 04:19:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:21,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 04:19:21,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:19:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 04:19:22,051 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:19:22,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117312743] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:19:22,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:19:22,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2024-11-14 04:19:22,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190633057] [2024-11-14 04:19:22,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:19:22,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:19:22,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:22,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:19:22,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:19:22,055 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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) [2024-11-14 04:19:22,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:22,226 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2024-11-14 04:19:22,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:19:22,226 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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 34 [2024-11-14 04:19:22,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:22,227 INFO L225 Difference]: With dead ends: 52 [2024-11-14 04:19:22,227 INFO L226 Difference]: Without dead ends: 52 [2024-11-14 04:19:22,227 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:19:22,227 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:22,228 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 32 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:19:22,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-14 04:19:22,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-14 04:19:22,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 51 states have internal predecessors, (58), 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) [2024-11-14 04:19:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2024-11-14 04:19:22,233 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 34 [2024-11-14 04:19:22,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:22,234 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2024-11-14 04:19:22,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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) [2024-11-14 04:19:22,234 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2024-11-14 04:19:22,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 04:19:22,234 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:22,234 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:19:22,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 04:19:22,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-14 04:19:22,435 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:19:22,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:22,436 INFO L85 PathProgramCache]: Analyzing trace with hash 326516689, now seen corresponding path program 1 times [2024-11-14 04:19:22,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:22,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062061151] [2024-11-14 04:19:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:22,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 04:19:22,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:22,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062061151] [2024-11-14 04:19:22,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062061151] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:19:22,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:19:22,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 04:19:22,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736286337] [2024-11-14 04:19:22,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:19:22,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:19:22,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:22,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:19:22,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:19:22,753 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:23,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:23,057 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2024-11-14 04:19:23,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 04:19:23,058 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-14 04:19:23,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:23,058 INFO L225 Difference]: With dead ends: 53 [2024-11-14 04:19:23,058 INFO L226 Difference]: Without dead ends: 53 [2024-11-14 04:19:23,059 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-14 04:19:23,059 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:23,060 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 58 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:19:23,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-14 04:19:23,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-14 04:19:23,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 52 states have internal predecessors, (58), 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) [2024-11-14 04:19:23,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2024-11-14 04:19:23,063 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 34 [2024-11-14 04:19:23,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:23,064 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2024-11-14 04:19:23,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:23,064 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2024-11-14 04:19:23,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 04:19:23,064 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:23,064 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:19:23,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-14 04:19:23,065 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:19:23,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:23,065 INFO L85 PathProgramCache]: Analyzing trace with hash 326518108, now seen corresponding path program 1 times [2024-11-14 04:19:23,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:23,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550191180] [2024-11-14 04:19:23,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:23,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:23,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:23,234 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 04:19:23,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:23,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550191180] [2024-11-14 04:19:23,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550191180] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:19:23,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:19:23,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-14 04:19:23,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895273850] [2024-11-14 04:19:23,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:19:23,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:19:23,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:23,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:19:23,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:19:23,237 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:23,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:23,488 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2024-11-14 04:19:23,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 04:19:23,489 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-14 04:19:23,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:23,489 INFO L225 Difference]: With dead ends: 55 [2024-11-14 04:19:23,490 INFO L226 Difference]: Without dead ends: 55 [2024-11-14 04:19:23,490 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-14 04:19:23,490 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:23,491 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 62 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:19:23,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-14 04:19:23,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2024-11-14 04:19:23,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 52 states have internal predecessors, (57), 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) [2024-11-14 04:19:23,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2024-11-14 04:19:23,493 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 34 [2024-11-14 04:19:23,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:23,493 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2024-11-14 04:19:23,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:23,494 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2024-11-14 04:19:23,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 04:19:23,494 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:23,494 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:19:23,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-14 04:19:23,495 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:19:23,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:23,495 INFO L85 PathProgramCache]: Analyzing trace with hash 881141898, now seen corresponding path program 2 times [2024-11-14 04:19:23,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:23,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026616210] [2024-11-14 04:19:23,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:23,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 04:19:23,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:23,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026616210] [2024-11-14 04:19:23,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026616210] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:19:23,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152239319] [2024-11-14 04:19:23,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:19:23,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:23,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:19:23,645 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:19:23,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 04:19:23,913 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 04:19:23,913 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:19:23,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 04:19:23,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:19:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 04:19:24,037 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:19:24,156 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 04:19:24,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152239319] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:19:24,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1545473104] [2024-11-14 04:19:24,158 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 04:19:24,159 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:19:24,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:19:24,160 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:19:24,160 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:19:25,858 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:19:45,932 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4965#(exists ((|v_ULTIMATE.start_main_~expected~0#1_34| Int) (|v_ULTIMATE.start_sll_get_data_at_~head#1.base_85| Int) (|v_ULTIMATE.start_sll_get_data_at_~index#1_80| Int) (|v_ULTIMATE.start_sll_get_data_at_~head#1.offset_80| Int)) (and (not (= |v_ULTIMATE.start_main_~expected~0#1_34| (select (select |#memory_int| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_85|) |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_80|))) (<= (+ |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_80| 4) (select |#length| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_85|)) (or (and (<= 8 (select |#length| |ULTIMATE.start_main_~s~0#1.base|)) (= |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_80| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 4)) (= |ULTIMATE.start_main_~i~0#1| 1) (= |v_ULTIMATE.start_main_~expected~0#1_34| 3) (= (select |#valid| |ULTIMATE.start_main_~s~0#1.base|) 1) (= |v_ULTIMATE.start_sll_get_data_at_~head#1.base_85| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 4))) (and (= |v_ULTIMATE.start_main_~expected~0#1_34| (+ 2 |ULTIMATE.start_main_~i~0#1|)) (= |ULTIMATE.start_main_~i~0#1| |v_ULTIMATE.start_sll_get_data_at_~index#1_80|) (= |v_ULTIMATE.start_sll_get_data_at_~head#1.base_85| |ULTIMATE.start_main_~s~0#1.base|))) (= (select |#valid| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_85|) 1) (<= 0 (+ (select (select |#memory_int| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_85|) |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_80|) 2147483648)) (<= (select (select |#memory_int| |v_ULTIMATE.start_sll_get_data_at_~head#1.base_85|) |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_80|) 2147483647) (or (and (= |v_ULTIMATE.start_sll_get_data_at_~index#1_80| 0) (= |v_ULTIMATE.start_main_~expected~0#1_34| 3) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_main_~s~0#1.offset| 0)) (and (= |v_ULTIMATE.start_sll_get_data_at_~index#1_80| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_80| 0) (= |ULTIMATE.start_main_~s~0#1.offset| 0))) (<= 0 |v_ULTIMATE.start_sll_get_data_at_~head#1.offset_80|)))' at error location [2024-11-14 04:19:45,932 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:19:45,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:19:45,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-14 04:19:45,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4532418] [2024-11-14 04:19:45,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:19:45,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 04:19:45,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:45,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 04:19:45,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=353, Unknown=4, NotChecked=0, Total=462 [2024-11-14 04:19:45,935 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:46,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:46,139 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2024-11-14 04:19:46,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:19:46,140 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-14 04:19:46,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:46,141 INFO L225 Difference]: With dead ends: 46 [2024-11-14 04:19:46,142 INFO L226 Difference]: Without dead ends: 46 [2024-11-14 04:19:46,142 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=114, Invalid=388, Unknown=4, NotChecked=0, Total=506 [2024-11-14 04:19:46,143 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:46,144 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 79 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:19:46,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-14 04:19:46,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-14 04:19:46,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 45 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:46,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2024-11-14 04:19:46,149 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 35 [2024-11-14 04:19:46,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:46,149 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2024-11-14 04:19:46,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:46,149 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2024-11-14 04:19:46,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-14 04:19:46,149 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:46,149 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:19:46,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 04:19:46,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-14 04:19:46,350 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:19:46,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:46,351 INFO L85 PathProgramCache]: Analyzing trace with hash 249962036, now seen corresponding path program 1 times [2024-11-14 04:19:46,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:46,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106485043] [2024-11-14 04:19:46,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:46,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 04:19:46,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:46,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106485043] [2024-11-14 04:19:46,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106485043] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:19:46,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:19:46,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 04:19:46,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883660507] [2024-11-14 04:19:46,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:19:46,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:19:46,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:46,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:19:46,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:19:46,543 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:46,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:46,774 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2024-11-14 04:19:46,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:19:46,774 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-14 04:19:46,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:46,775 INFO L225 Difference]: With dead ends: 47 [2024-11-14 04:19:46,775 INFO L226 Difference]: Without dead ends: 47 [2024-11-14 04:19:46,775 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-14 04:19:46,776 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 5 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:46,776 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 44 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:19:46,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-14 04:19:46,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-11-14 04:19:46,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 46 states have internal predecessors, (50), 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) [2024-11-14 04:19:46,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2024-11-14 04:19:46,780 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 36 [2024-11-14 04:19:46,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:46,781 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2024-11-14 04:19:46,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:46,781 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2024-11-14 04:19:46,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 04:19:46,781 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:46,781 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:19:46,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-14 04:19:46,782 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:19:46,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:46,782 INFO L85 PathProgramCache]: Analyzing trace with hash -854124183, now seen corresponding path program 1 times [2024-11-14 04:19:46,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:46,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928227520] [2024-11-14 04:19:46,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:46,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:48,101 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 04:19:48,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:48,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928227520] [2024-11-14 04:19:48,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928227520] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:19:48,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253120877] [2024-11-14 04:19:48,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:48,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:48,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:19:48,104 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:19:48,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 04:19:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:48,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-14 04:19:48,420 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:19:48,444 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 04:19:48,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-14 04:19:48,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 04:19:48,810 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-14 04:19:48,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-14 04:19:48,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:19:48,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-11-14 04:19:49,086 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:19:49,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2024-11-14 04:19:49,175 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-14 04:19:49,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 04:19:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:19:49,181 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:19:49,351 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1792 (Array Int Int))) (or (not (= (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_1792 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_1792)) (= (select (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1792) |c_ULTIMATE.start_main_~s~0#1.base|) 4)) 1))) is different from false [2024-11-14 04:19:49,625 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:19:49,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 41 [2024-11-14 04:19:50,164 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_158| Int)) (or (forall ((v_DerPreprocessor_8 Int) (v_ArrVal_1791 (Array Int Int))) (not (= (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1791) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_158| v_DerPreprocessor_8) 4) |c_ULTIMATE.start_main_~s~0#1.base|))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_158|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_158| Int)) (or (forall ((v_DerPreprocessor_8 Int) (v_ArrVal_1791 (Array Int Int))) (= (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1791) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_158| v_DerPreprocessor_8) 4) .cse0)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_158|))))) is different from false [2024-11-14 04:19:50,194 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_158| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_158|) (forall ((v_DerPreprocessor_8 Int) (v_ArrVal_1791 (Array Int Int))) (not (= (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1791) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_158| v_DerPreprocessor_8) 4) |c_ULTIMATE.start_sll_create_~head~0#1.base|))))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_158| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_158|) (forall ((v_DerPreprocessor_8 Int) (v_ArrVal_1791 (Array Int Int))) (= .cse0 (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1791) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_158| v_DerPreprocessor_8) 4))))))) is different from false [2024-11-14 04:19:50,207 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:19:50,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2024-11-14 04:19:50,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2024-11-14 04:19:50,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2024-11-14 04:19:50,233 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:19:50,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 59 [2024-11-14 04:19:50,290 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-14 04:19:50,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2024-11-14 04:19:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 6 not checked. [2024-11-14 04:19:50,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253120877] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:19:50,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1579322224] [2024-11-14 04:19:50,346 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-14 04:19:50,346 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:19:50,346 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:19:50,347 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:19:50,347 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:19:51,609 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:49,404 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5438#(exists ((|v_ULTIMATE.start_sll_destroy_~head#1.base_27| Int)) (and (not (= (select |#valid| |v_ULTIMATE.start_sll_destroy_~head#1.base_27|) 1)) (or (not (= |v_ULTIMATE.start_sll_destroy_~head#1.base_27| 0)) (not (= |ULTIMATE.start_sll_destroy_~head#1.offset| 0)))))' at error location [2024-11-14 04:20:49,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:20:49,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:49,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 32 [2024-11-14 04:20:49,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373509793] [2024-11-14 04:20:49,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:20:49,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-14 04:20:49,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:49,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-14 04:20:49,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1823, Unknown=25, NotChecked=264, Total=2256 [2024-11-14 04:20:49,407 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 33 states, 32 states have (on average 2.4375) internal successors, (78), 33 states have internal predecessors, (78), 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) [2024-11-14 04:21:00,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:21:00,982 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2024-11-14 04:21:00,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 04:21:00,983 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 33 states have internal predecessors, (78), 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 39 [2024-11-14 04:21:00,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:21:00,983 INFO L225 Difference]: With dead ends: 54 [2024-11-14 04:21:00,984 INFO L226 Difference]: Without dead ends: 54 [2024-11-14 04:21:00,985 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 69.9s TimeCoverageRelationStatistics Valid=206, Invalid=2429, Unknown=29, NotChecked=306, Total=2970 [2024-11-14 04:21:00,985 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:21:00,986 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 112 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 762 Invalid, 0 Unknown, 139 Unchecked, 1.0s Time] [2024-11-14 04:21:00,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-14 04:21:00,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2024-11-14 04:21:00,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 49 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) [2024-11-14 04:21:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2024-11-14 04:21:00,988 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 39 [2024-11-14 04:21:00,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:21:00,989 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2024-11-14 04:21:00,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 33 states have internal predecessors, (78), 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) [2024-11-14 04:21:00,989 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2024-11-14 04:21:00,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 04:21:00,990 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:21:00,990 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:21:01,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-14 04:21:01,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-14 04:21:01,190 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:21:01,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:21:01,191 INFO L85 PathProgramCache]: Analyzing trace with hash -854124182, now seen corresponding path program 1 times [2024-11-14 04:21:01,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:21:01,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693945199] [2024-11-14 04:21:01,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:21:01,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:21:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:21:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 04:21:02,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:21:02,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693945199] [2024-11-14 04:21:02,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693945199] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:21:02,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934958071] [2024-11-14 04:21:02,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:21:02,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:21:02,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:21:02,756 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:21:02,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 04:21:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:21:03,031 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-14 04:21:03,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:21:03,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-14 04:21:03,088 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-14 04:21:03,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-14 04:21:03,114 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 04:21:03,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-14 04:21:03,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:21:03,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 04:21:03,423 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-14 04:21:03,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2024-11-14 04:21:03,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-11-14 04:21:03,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:21:03,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-14 04:21:03,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:21:03,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2024-11-14 04:21:03,741 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:21:03,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2024-11-14 04:21:03,759 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:21:03,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2024-11-14 04:21:03,851 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 04:21:03,852 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:21:04,245 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|))) (and (forall ((v_ArrVal_1906 (Array Int Int))) (or (forall ((v_ArrVal_1907 (Array Int Int))) (or (not (= (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_1907 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_1907)) (< (+ 7 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1906) |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1907) |c_ULTIMATE.start_main_~s~0#1.base|) 4))))) (not (= (store .cse0 |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_1906 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_1906)))) (forall ((v_ArrVal_1906 (Array Int Int))) (or (< 0 (+ 5 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1906) |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (not (= (store .cse0 |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_1906 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_1906)))))) is different from false [2024-11-14 04:21:05,015 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (and (forall ((v_DerPreprocessor_12 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_175| Int) (v_ArrVal_1905 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_175|) (< 0 (+ (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1905) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_175| v_DerPreprocessor_12) 4) 5)))) (forall ((v_DerPreprocessor_11 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_175| Int) (v_ArrVal_1905 (Array Int Int)) (v_ArrVal_1904 (Array Int Int)) (v_DerPreprocessor_10 Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_175|) (< (+ 7 (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1905) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_175| v_DerPreprocessor_11) 4)) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1904) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_175| v_DerPreprocessor_10) 4))))))) is different from false [2024-11-14 04:21:05,062 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)))) (and (forall ((v_DerPreprocessor_12 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_175| Int) (v_ArrVal_1905 (Array Int Int))) (or (< 0 (+ (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1905) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_175| v_DerPreprocessor_12) 4) 5)) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_175|))) (forall ((v_DerPreprocessor_11 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_175| Int) (v_ArrVal_1905 (Array Int Int)) (v_ArrVal_1904 (Array Int Int)) (v_DerPreprocessor_10 Int)) (or (< (+ 7 (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1905) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_175| v_DerPreprocessor_11) 4)) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1904) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_175| v_DerPreprocessor_10) 4))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_175|))))) is different from false [2024-11-14 04:21:05,077 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:21:05,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 48 [2024-11-14 04:21:05,086 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:21:05,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2024-11-14 04:21:05,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2024-11-14 04:21:05,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 106 [2024-11-14 04:21:05,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:21:05,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 52 [2024-11-14 04:21:05,155 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:21:05,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 59 [2024-11-14 04:21:05,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2024-11-14 04:21:05,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2024-11-14 04:21:05,313 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:21:05,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 04:21:05,318 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:21:05,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-14 04:21:05,325 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:21:05,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-14 04:21:05,626 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:21:05,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 52 [2024-11-14 04:21:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 6 not checked. [2024-11-14 04:21:05,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934958071] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:21:05,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [391876839] [2024-11-14 04:21:05,779 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-14 04:21:05,779 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:21:05,780 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:21:05,780 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:21:05,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:21:07,149 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:21:26,787 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5573#true' at error location [2024-11-14 04:21:26,787 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:21:26,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:21:26,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 37 [2024-11-14 04:21:26,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565688930] [2024-11-14 04:21:26,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:21:26,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-14 04:21:26,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:21:26,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-14 04:21:26,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2165, Unknown=34, NotChecked=288, Total=2652 [2024-11-14 04:21:26,791 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 38 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 38 states have internal predecessors, (87), 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) [2024-11-14 04:21:28,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:21:28,897 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2024-11-14 04:21:28,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 04:21:28,898 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 38 states have internal predecessors, (87), 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 39 [2024-11-14 04:21:28,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:21:28,898 INFO L225 Difference]: With dead ends: 55 [2024-11-14 04:21:28,899 INFO L226 Difference]: Without dead ends: 55 [2024-11-14 04:21:28,900 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 78 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=235, Invalid=2931, Unknown=38, NotChecked=336, Total=3540 [2024-11-14 04:21:28,902 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 23 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:21:28,903 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 131 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 744 Invalid, 0 Unknown, 133 Unchecked, 1.2s Time] [2024-11-14 04:21:28,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-14 04:21:28,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2024-11-14 04:21:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 50 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) [2024-11-14 04:21:28,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2024-11-14 04:21:28,908 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 39 [2024-11-14 04:21:28,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:21:28,909 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2024-11-14 04:21:28,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 38 states have internal predecessors, (87), 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) [2024-11-14 04:21:28,909 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2024-11-14 04:21:28,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 04:21:28,909 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:21:28,910 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:21:28,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 04:21:29,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-14 04:21:29,110 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:21:29,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:21:29,111 INFO L85 PathProgramCache]: Analyzing trace with hash -854122763, now seen corresponding path program 1 times [2024-11-14 04:21:29,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:21:29,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397824975] [2024-11-14 04:21:29,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:21:29,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:21:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:21:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 04:21:30,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:21:30,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397824975] [2024-11-14 04:21:30,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397824975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:21:30,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313803514] [2024-11-14 04:21:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:21:30,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:21:30,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:21:30,519 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:21:30,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 04:21:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:21:30,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-14 04:21:30,805 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:21:30,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-14 04:21:30,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-14 04:21:31,283 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-14 04:21:31,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-14 04:21:31,424 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:21:31,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 16 [2024-11-14 04:21:31,482 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:21:31,482 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:21:31,665 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:21:31,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2024-11-14 04:21:32,377 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 04:21:32,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313803514] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:21:32,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1612279247] [2024-11-14 04:21:32,379 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-14 04:21:32,380 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:21:32,380 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:21:32,380 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:21:32,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:21:33,999 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:22:02,952 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6243#(and (exists ((|v_ULTIMATE.start_main_old_#valid#1_10| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_10| |#valid|))) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-14 04:22:02,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:22:02,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:22:02,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 14] total 38 [2024-11-14 04:22:02,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461259907] [2024-11-14 04:22:02,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:22:02,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-14 04:22:02,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:22:02,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-14 04:22:02,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2724, Unknown=15, NotChecked=0, Total=2970 [2024-11-14 04:22:02,955 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 38 states have internal predecessors, (97), 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) [2024-11-14 04:22:07,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:22:07,293 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2024-11-14 04:22:07,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 04:22:07,294 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 38 states have internal predecessors, (97), 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 39 [2024-11-14 04:22:07,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:22:07,294 INFO L225 Difference]: With dead ends: 55 [2024-11-14 04:22:07,294 INFO L226 Difference]: Without dead ends: 55 [2024-11-14 04:22:07,296 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=437, Invalid=4518, Unknown=15, NotChecked=0, Total=4970 [2024-11-14 04:22:07,296 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 106 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:22:07,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 100 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-14 04:22:07,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-14 04:22:07,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2024-11-14 04:22:07,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.173913043478261) internal successors, (54), 50 states have internal predecessors, (54), 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) [2024-11-14 04:22:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2024-11-14 04:22:07,300 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 39 [2024-11-14 04:22:07,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:22:07,301 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2024-11-14 04:22:07,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 38 states have internal predecessors, (97), 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) [2024-11-14 04:22:07,301 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2024-11-14 04:22:07,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-14 04:22:07,301 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:22:07,302 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:22:07,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-14 04:22:07,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:22:07,502 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:22:07,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:22:07,503 INFO L85 PathProgramCache]: Analyzing trace with hash -474548851, now seen corresponding path program 1 times [2024-11-14 04:22:07,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:22:07,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196358841] [2024-11-14 04:22:07,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:22:07,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:22:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:22:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 04:22:09,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:22:09,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196358841] [2024-11-14 04:22:09,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196358841] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:22:09,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269693617] [2024-11-14 04:22:09,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:22:09,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:22:09,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:22:09,796 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:22:09,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 04:22:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:22:10,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-14 04:22:10,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:22:10,249 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 04:22:10,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-14 04:22:10,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 04:22:10,756 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-14 04:22:10,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-14 04:22:10,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:22:10,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2024-11-14 04:22:11,368 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:22:11,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2024-11-14 04:22:11,550 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 04:22:11,550 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:22:12,088 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2124 (Array Int Int))) (or (not (= v_ArrVal_2124 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_2124 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))) (< (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2124) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_#StackHeapBarrier|))) is different from false [2024-11-14 04:22:12,422 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_13 Int) (v_ArrVal_2123 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_208| Int)) (or (< (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2123) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_208| v_DerPreprocessor_13) 4) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_208|))) is different from false [2024-11-14 04:22:12,833 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_13 Int) (v_ArrVal_2123 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_208| Int)) (or (< (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2123) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_208| v_DerPreprocessor_13) 4) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_208|))) is different from false [2024-11-14 04:22:12,863 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_13 Int) (v_ArrVal_2123 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_208| Int)) (or (< (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) v_ArrVal_2123) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_208| v_DerPreprocessor_13) 4) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_208|))) is different from false [2024-11-14 04:22:12,882 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:22:12,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 04:22:12,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-11-14 04:22:12,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2024-11-14 04:22:12,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:22:12,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2024-11-14 04:22:13,347 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-14 04:22:13,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-14 04:22:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 7 not checked. [2024-11-14 04:22:13,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269693617] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:22:13,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [477132155] [2024-11-14 04:22:13,389 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-14 04:22:13,390 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:22:13,390 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:22:13,390 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:22:13,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:22:14,643 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:22:37,888 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6672#(exists ((|v_ULTIMATE.start_sll_destroy_~head#1.base_44| Int)) (and (<= |#StackHeapBarrier| |v_ULTIMATE.start_sll_destroy_~head#1.base_44|) (= (select |#valid| |v_ULTIMATE.start_sll_destroy_~head#1.base_44|) 1) (<= 8 (select |#length| |v_ULTIMATE.start_sll_destroy_~head#1.base_44|)) (not (= |v_ULTIMATE.start_sll_destroy_~head#1.base_44| 0)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_destroy_~head#1.base_44|) 4) |ULTIMATE.start_sll_destroy_~temp~1#1.offset|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_destroy_~head#1.base_44|) 4) |ULTIMATE.start_sll_destroy_~temp~1#1.base|)))' at error location [2024-11-14 04:22:37,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:22:37,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:22:37,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 33 [2024-11-14 04:22:37,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61298898] [2024-11-14 04:22:37,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:22:37,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-14 04:22:37,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:22:37,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-14 04:22:37,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1817, Unknown=25, NotChecked=356, Total=2352 [2024-11-14 04:22:37,891 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 34 states, 33 states have (on average 2.515151515151515) internal successors, (83), 34 states have internal predecessors, (83), 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) [2024-11-14 04:22:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:22:41,295 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2024-11-14 04:22:41,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 04:22:41,296 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.515151515151515) internal successors, (83), 34 states have internal predecessors, (83), 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 41 [2024-11-14 04:22:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:22:41,296 INFO L225 Difference]: With dead ends: 56 [2024-11-14 04:22:41,296 INFO L226 Difference]: Without dead ends: 56 [2024-11-14 04:22:41,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 88 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=228, Invalid=2730, Unknown=28, NotChecked=436, Total=3422 [2024-11-14 04:22:41,298 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:22:41,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 152 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 695 Invalid, 0 Unknown, 185 Unchecked, 1.9s Time] [2024-11-14 04:22:41,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-14 04:22:41,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2024-11-14 04:22:41,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1702127659574468) 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) [2024-11-14 04:22:41,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2024-11-14 04:22:41,301 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 41 [2024-11-14 04:22:41,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:22:41,301 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2024-11-14 04:22:41,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.515151515151515) internal successors, (83), 34 states have internal predecessors, (83), 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) [2024-11-14 04:22:41,302 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2024-11-14 04:22:41,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 04:22:41,302 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:22:41,302 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:22:41,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-14 04:22:41,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:22:41,507 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:22:41,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:22:41,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1747670896, now seen corresponding path program 2 times [2024-11-14 04:22:41,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:22:41,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494232649] [2024-11-14 04:22:41,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:22:41,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:22:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:22:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:22:45,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:22:45,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494232649] [2024-11-14 04:22:45,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494232649] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:22:45,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48308650] [2024-11-14 04:22:45,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:22:45,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:22:45,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:22:45,540 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:22:45,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 04:22:45,873 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 04:22:45,873 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:22:45,876 INFO L255 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-14 04:22:45,880 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:22:45,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:22:46,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:22:46,208 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 04:22:46,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-14 04:22:46,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 04:22:46,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 04:22:46,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 04:22:46,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 04:22:46,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2024-11-14 04:22:46,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2024-11-14 04:22:47,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:22:47,730 INFO L349 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2024-11-14 04:22:47,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 60 [2024-11-14 04:22:47,796 INFO L349 Elim1Store]: treesize reduction 33, result has 28.3 percent of original size [2024-11-14 04:22:47,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 32 [2024-11-14 04:22:48,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:22:48,168 INFO L349 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2024-11-14 04:22:48,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 34 [2024-11-14 04:22:48,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2024-11-14 04:22:48,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-14 04:22:49,766 INFO L349 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2024-11-14 04:22:49,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 38 [2024-11-14 04:22:49,811 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:22:49,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2024-11-14 04:22:50,025 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 04:22:50,025 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:23:17,747 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 4 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_227| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_227|) (forall ((v_ArrVal_2242 (Array Int Int))) (or (forall ((v_ArrVal_2243 (Array Int Int))) (or (forall ((v_ArrVal_2244 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base| v_ArrVal_2243) |c_ULTIMATE.start_sll_create_~new_head~0#1.base| v_ArrVal_2244) (select (select (store .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base| v_ArrVal_2242) |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 4)) 4) 0)) (not (= (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_227| (select v_ArrVal_2243 |v_ULTIMATE.start_sll_update_at_~head#1.offset_227|)) v_ArrVal_2243)))) (not (= (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_227| (select v_ArrVal_2242 |v_ULTIMATE.start_sll_update_at_~head#1.offset_227|)) v_ArrVal_2242)))))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_227| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_227|) (forall ((v_ArrVal_2242 (Array Int Int))) (or (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_226| Int) (v_ArrVal_2245 (Array Int Int))) (or (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| v_ArrVal_2242) |c_ULTIMATE.start_sll_create_~new_head~0#1.base| v_ArrVal_2245) (select v_ArrVal_2245 4)) 4) 0) (not (= (store (select (store .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base| v_ArrVal_2242) |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_226| (select v_ArrVal_2245 |v_ULTIMATE.start_sll_update_at_~head#1.offset_226|)) v_ArrVal_2245)) (< 0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_226|))) (not (= (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_227| (select v_ArrVal_2242 |v_ULTIMATE.start_sll_update_at_~head#1.offset_227|)) v_ArrVal_2242))))))))) is different from false [2024-11-14 04:23:17,815 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:23:17,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2024-11-14 04:23:17,929 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:23:17,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2024-11-14 04:23:17,958 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:23:17,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2024-11-14 04:23:18,077 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_226| Int) (v_arrayElimArr_12 (Array Int Int)) (v_ArrVal_2245 (Array Int Int)) (v_ArrVal_2242 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_227| Int)) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_12))) (or (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| v_ArrVal_2242) |c_ULTIMATE.start_node_create_~temp~0#1.base| v_ArrVal_2245) (select v_ArrVal_2245 4)) 4) 0) (not (= (select v_arrayElimArr_12 4) |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (not (= v_ArrVal_2245 (store (select (store .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base| v_ArrVal_2242) |c_ULTIMATE.start_node_create_~temp~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_226| (select v_ArrVal_2245 |v_ULTIMATE.start_sll_update_at_~head#1.offset_226|)))) (not (= (store (select .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_227| (select v_ArrVal_2242 |v_ULTIMATE.start_sll_update_at_~head#1.offset_227|)) v_ArrVal_2242)) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_227|) (< 0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_226|)))) (forall ((v_arrayElimArr_13 (Array Int Int)) (v_arrayElimArr_14 (Array Int Int)) (v_ArrVal_2244 (Array Int Int)) (v_ArrVal_2243 (Array Int Int)) (v_ArrVal_2242 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_227| Int)) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_13))) (or (not (= (store (select .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_227| (select v_ArrVal_2242 |v_ULTIMATE.start_sll_update_at_~head#1.offset_227|)) v_ArrVal_2242)) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base| v_ArrVal_2243) |c_ULTIMATE.start_node_create_~temp~0#1.base| v_ArrVal_2244) (select (select (store .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.base| v_ArrVal_2242) |c_ULTIMATE.start_node_create_~temp~0#1.base|) 4)) 4) 0) (not (= (select v_arrayElimArr_13 4) |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (not (= (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_14) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_227| (select v_ArrVal_2243 |v_ULTIMATE.start_sll_update_at_~head#1.offset_227|)) v_ArrVal_2243)) (not (= (select v_arrayElimArr_14 4) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_227|))))) is different from false [2024-11-14 04:23:19,593 INFO L349 Elim1Store]: treesize reduction 35, result has 58.3 percent of original size [2024-11-14 04:23:19,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 419 treesize of output 430 [2024-11-14 04:23:19,906 INFO L349 Elim1Store]: treesize reduction 19, result has 63.5 percent of original size [2024-11-14 04:23:19,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 404 treesize of output 410 [2024-11-14 04:23:20,010 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:23:20,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 337 treesize of output 337 [2024-11-14 04:23:20,229 INFO L349 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2024-11-14 04:23:20,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 358 treesize of output 362 [2024-11-14 04:23:20,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 289 treesize of output 285 [2024-11-14 04:23:20,433 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:23:20,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 292 treesize of output 310 [2024-11-14 04:23:20,675 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:23:20,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 361 treesize of output 379 [2024-11-14 04:23:20,902 INFO L349 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2024-11-14 04:23:20,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 295 treesize of output 308 [2024-11-14 04:23:21,188 INFO L349 Elim1Store]: treesize reduction 24, result has 61.9 percent of original size [2024-11-14 04:23:21,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 288 treesize of output 329 [2024-11-14 04:23:23,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2024-11-14 04:23:23,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2024-11-14 04:23:23,859 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:23:23,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 183 treesize of output 185 [2024-11-14 04:23:24,597 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:23:24,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 257 treesize of output 259 [2024-11-14 04:23:25,465 INFO L349 Elim1Store]: treesize reduction 30, result has 60.0 percent of original size [2024-11-14 04:23:25,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 120 treesize of output 164 [2024-11-14 04:23:25,893 INFO L349 Elim1Store]: treesize reduction 68, result has 10.5 percent of original size [2024-11-14 04:23:25,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 24 [2024-11-14 04:23:26,111 INFO L349 Elim1Store]: treesize reduction 28, result has 22.2 percent of original size [2024-11-14 04:23:26,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2024-11-14 04:23:26,238 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:23:26,258 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-14 04:23:26,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 16 [2024-11-14 04:23:26,298 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:23:26,307 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:23:26,363 INFO L349 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2024-11-14 04:23:26,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2024-11-14 04:23:26,507 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:23:26,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2024-11-14 04:23:26,622 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:23:26,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2024-11-14 04:23:26,709 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:23:26,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2024-11-14 04:23:26,885 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:23:26,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 70 [2024-11-14 04:23:26,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 231 [2024-11-14 04:23:27,208 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:23:27,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2024-11-14 04:23:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 4 not checked. [2024-11-14 04:23:27,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48308650] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:23:27,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1905141557] [2024-11-14 04:23:27,358 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-14 04:23:27,358 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:23:27,358 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:23:27,358 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:23:27,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:23:29,081 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:24:13,478 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7126#(exists ((|v_ULTIMATE.start_sll_destroy_~head#1.base_51| Int)) (and (or (not (= |v_ULTIMATE.start_sll_destroy_~head#1.base_51| 0)) (not (= |ULTIMATE.start_sll_destroy_~head#1.offset| 0))) (not (= (select |#valid| |v_ULTIMATE.start_sll_destroy_~head#1.base_51|) 1))))' at error location [2024-11-14 04:24:13,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:24:13,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:24:13,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 21] total 49 [2024-11-14 04:24:13,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822315589] [2024-11-14 04:24:13,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:24:13,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-14 04:24:13,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:24:13,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-14 04:24:13,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=3667, Unknown=26, NotChecked=246, Total=4160 [2024-11-14 04:24:13,481 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 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) [2024-11-14 04:24:17,230 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 4 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (and (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (not (= |c_ULTIMATE.start_sll_create_~new_head~0#1.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_227| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_227|) (forall ((v_ArrVal_2242 (Array Int Int))) (or (forall ((v_ArrVal_2243 (Array Int Int))) (or (forall ((v_ArrVal_2244 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base| v_ArrVal_2243) |c_ULTIMATE.start_sll_create_~new_head~0#1.base| v_ArrVal_2244) (select (select (store .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base| v_ArrVal_2242) |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 4)) 4) 0)) (not (= (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_227| (select v_ArrVal_2243 |v_ULTIMATE.start_sll_update_at_~head#1.offset_227|)) v_ArrVal_2243)))) (not (= (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_227| (select v_ArrVal_2242 |v_ULTIMATE.start_sll_update_at_~head#1.offset_227|)) v_ArrVal_2242)))))) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_227| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_227|) (forall ((v_ArrVal_2242 (Array Int Int))) (or (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_226| Int) (v_ArrVal_2245 (Array Int Int))) (or (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| v_ArrVal_2242) |c_ULTIMATE.start_sll_create_~new_head~0#1.base| v_ArrVal_2245) (select v_ArrVal_2245 4)) 4) 0) (not (= (store (select (store .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base| v_ArrVal_2242) |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_226| (select v_ArrVal_2245 |v_ULTIMATE.start_sll_update_at_~head#1.offset_226|)) v_ArrVal_2245)) (< 0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_226|))) (not (= (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_227| (select v_ArrVal_2242 |v_ULTIMATE.start_sll_update_at_~head#1.offset_227|)) v_ArrVal_2242)))))) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 0)))) is different from false [2024-11-14 04:24:24,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:24:24,009 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2024-11-14 04:24:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 04:24:24,010 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 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 44 [2024-11-14 04:24:24,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:24:24,011 INFO L225 Difference]: With dead ends: 90 [2024-11-14 04:24:24,011 INFO L226 Difference]: Without dead ends: 90 [2024-11-14 04:24:24,012 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 80.8s TimeCoverageRelationStatistics Valid=309, Invalid=4788, Unknown=27, NotChecked=426, Total=5550 [2024-11-14 04:24:24,013 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:24:24,013 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 305 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1001 Invalid, 0 Unknown, 156 Unchecked, 5.4s Time] [2024-11-14 04:24:24,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-14 04:24:24,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2024-11-14 04:24:24,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 87 states have internal predecessors, (94), 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) [2024-11-14 04:24:24,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2024-11-14 04:24:24,020 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 44 [2024-11-14 04:24:24,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:24:24,020 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2024-11-14 04:24:24,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 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) [2024-11-14 04:24:24,020 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2024-11-14 04:24:24,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 04:24:24,021 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:24:24,021 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:24:24,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-14 04:24:24,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:24:24,222 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:24:24,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:24:24,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1747672316, now seen corresponding path program 2 times [2024-11-14 04:24:24,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:24:24,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261833830] [2024-11-14 04:24:24,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:24:24,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:24:24,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:24:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 04:24:27,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:24:27,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261833830] [2024-11-14 04:24:27,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261833830] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:24:27,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564773719] [2024-11-14 04:24:27,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:24:27,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:24:27,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:24:27,391 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:24:27,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 04:24:27,721 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 04:24:27,721 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:24:27,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-14 04:24:27,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:24:28,165 INFO L349 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2024-11-14 04:24:28,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 39 [2024-11-14 04:24:28,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-14 04:24:29,929 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2024-11-14 04:24:29,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 54 [2024-11-14 04:24:30,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:24:30,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2024-11-14 04:24:31,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2024-11-14 04:24:31,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 37 [2024-11-14 04:24:32,243 INFO L349 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2024-11-14 04:24:32,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 44 [2024-11-14 04:24:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 04:24:32,617 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:24:35,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:24:35,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2024-11-14 04:24:35,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2024-11-14 04:24:35,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-11-14 04:24:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 04:24:45,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564773719] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:24:45,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [528839739] [2024-11-14 04:24:45,606 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-14 04:24:45,606 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:24:45,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:24:45,607 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:24:45,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:24:47,102 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:25:30,432 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7641#(and (exists ((|v_ULTIMATE.start_main_old_#valid#1_11| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_11| |#valid|))) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-14 04:25:30,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:25:30,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:25:30,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 17] total 42 [2024-11-14 04:25:30,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881827006] [2024-11-14 04:25:30,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:25:30,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-14 04:25:30,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:30,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-14 04:25:30,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=3423, Unknown=22, NotChecked=0, Total=3660 [2024-11-14 04:25:30,435 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 44 states, 43 states have (on average 2.558139534883721) internal successors, (110), 43 states have internal predecessors, (110), 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) [2024-11-14 04:25:37,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:37,393 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2024-11-14 04:25:37,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 04:25:37,394 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.558139534883721) internal successors, (110), 43 states have internal predecessors, (110), 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 44 [2024-11-14 04:25:37,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:37,394 INFO L225 Difference]: With dead ends: 89 [2024-11-14 04:25:37,394 INFO L226 Difference]: Without dead ends: 57 [2024-11-14 04:25:37,395 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 85 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 61.9s TimeCoverageRelationStatistics Valid=287, Invalid=4521, Unknown=22, NotChecked=0, Total=4830 [2024-11-14 04:25:37,396 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:37,396 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 146 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 838 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2024-11-14 04:25:37,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-14 04:25:37,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-14 04:25:37,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 56 states have internal predecessors, (60), 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) [2024-11-14 04:25:37,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2024-11-14 04:25:37,399 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 44 [2024-11-14 04:25:37,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:37,399 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2024-11-14 04:25:37,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.558139534883721) internal successors, (110), 43 states have internal predecessors, (110), 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) [2024-11-14 04:25:37,400 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2024-11-14 04:25:37,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-14 04:25:37,400 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:37,401 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:37,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-14 04:25:37,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:25:37,601 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-14 04:25:37,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:37,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1049304689, now seen corresponding path program 3 times [2024-11-14 04:25:37,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:37,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777053343] [2024-11-14 04:25:37,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:37,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:37,879 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 04:25:37,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:37,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777053343] [2024-11-14 04:25:37,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777053343] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:25:37,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710983177] [2024-11-14 04:25:37,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:25:37,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:25:37,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:25:37,883 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:25:37,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 04:25:38,272 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:25:38,272 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:25:38,276 INFO L255 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-14 04:25:38,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:25:38,527 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-14 04:25:38,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-14 04:25:38,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 04:25:39,245 INFO L349 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2024-11-14 04:25:39,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2024-11-14 04:25:39,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2024-11-14 04:25:39,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2024-11-14 04:25:39,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 04:25:39,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 29 [2024-11-14 04:25:40,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-14 04:25:40,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:25:40,999 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-14 04:25:41,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 47 [2024-11-14 04:25:41,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:25:41,547 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-14 04:25:41,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 36 [2024-11-14 04:25:43,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:25:43,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 34 [2024-11-14 04:25:43,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:25:43,657 INFO L349 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2024-11-14 04:25:43,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 32 [2024-11-14 04:25:44,454 INFO L349 Elim1Store]: treesize reduction 28, result has 26.3 percent of original size [2024-11-14 04:25:44,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2024-11-14 04:25:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:25:44,747 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:25:55,291 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:25:55,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2024-11-14 04:25:56,964 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:25:56,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 73 [2024-11-14 04:25:56,989 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:25:56,993 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:25:57,050 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 04:25:57,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 78 [2024-11-14 04:25:57,073 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:25:57,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2024-11-14 04:25:57,160 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:25:57,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2024-11-14 04:26:00,056 INFO L349 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2024-11-14 04:26:00,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 231 treesize of output 1 [2024-11-14 04:26:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 22 refuted. 1 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:26:00,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710983177] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:26:00,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1400365186] [2024-11-14 04:26:00,060 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-14 04:26:00,060 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:26:00,060 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:26:00,060 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:26:00,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:26:01,617 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:26:09,128 WARN L286 SmtUtils]: Spent 5.51s on a formula simplification. DAG size of input: 192 DAG size of output: 187 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:26:45,572 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8155#(and (exists ((|v_ULTIMATE.start_sll_destroy_~head#1.base_68| Int)) (not (= (select |#valid| |v_ULTIMATE.start_sll_destroy_~head#1.base_68|) 1))) (= |ULTIMATE.start_main_~len~0#1| 2))' at error location [2024-11-14 04:26:45,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:26:45,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:26:45,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 21, 21] total 45 [2024-11-14 04:26:45,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869047567] [2024-11-14 04:26:45,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:26:45,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-14 04:26:45,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:26:45,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-14 04:26:45,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=3343, Unknown=78, NotChecked=0, Total=3660 [2024-11-14 04:26:45,574 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 45 states, 45 states have (on average 2.688888888888889) internal successors, (121), 45 states have internal predecessors, (121), 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) [2024-11-14 04:26:51,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:26:51,174 INFO L93 Difference]: Finished difference Result 12 states and 11 transitions. [2024-11-14 04:26:51,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 04:26:51,175 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.688888888888889) internal successors, (121), 45 states have internal predecessors, (121), 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 49 [2024-11-14 04:26:51,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:26:51,175 INFO L225 Difference]: With dead ends: 12 [2024-11-14 04:26:51,175 INFO L226 Difference]: Without dead ends: 0 [2024-11-14 04:26:51,176 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 61.8s TimeCoverageRelationStatistics Valid=279, Invalid=4163, Unknown=114, NotChecked=0, Total=4556 [2024-11-14 04:26:51,176 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 1 mSolverCounterUnsat, 40 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 40 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:26:51,176 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 229 Invalid, 40 Unknown, 0 Unchecked, 2.9s Time] [2024-11-14 04:26:51,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-14 04:26:51,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-14 04:26:51,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:51,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-14 04:26:51,177 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2024-11-14 04:26:51,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:26:51,177 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-14 04:26:51,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.688888888888889) internal successors, (121), 45 states have internal predecessors, (121), 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) [2024-11-14 04:26:51,177 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-14 04:26:51,177 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-14 04:26:51,180 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 21 remaining) [2024-11-14 04:26:51,180 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 21 remaining) [2024-11-14 04:26:51,181 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 21 remaining) [2024-11-14 04:26:51,181 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 21 remaining) [2024-11-14 04:26:51,181 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 21 remaining) [2024-11-14 04:26:51,181 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 21 remaining) [2024-11-14 04:26:51,181 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 21 remaining) [2024-11-14 04:26:51,181 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 21 remaining) [2024-11-14 04:26:51,181 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 21 remaining) [2024-11-14 04:26:51,181 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 21 remaining) [2024-11-14 04:26:51,181 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 21 remaining) [2024-11-14 04:26:51,181 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 21 remaining) [2024-11-14 04:26:51,181 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 21 remaining) [2024-11-14 04:26:51,182 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 21 remaining) [2024-11-14 04:26:51,182 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 21 remaining) [2024-11-14 04:26:51,182 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 21 remaining) [2024-11-14 04:26:51,182 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (4 of 21 remaining) [2024-11-14 04:26:51,182 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (3 of 21 remaining) [2024-11-14 04:26:51,182 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (2 of 21 remaining) [2024-11-14 04:26:51,182 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK (1 of 21 remaining) [2024-11-14 04:26:51,182 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK (0 of 21 remaining) [2024-11-14 04:26:51,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-14 04:26:51,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-14 04:26:51,386 INFO L407 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:26:51,388 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-14 04:26:51,393 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.11 04:26:51 BoogieIcfgContainer [2024-11-14 04:26:51,393 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-14 04:26:51,394 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-14 04:26:51,394 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-14 04:26:51,394 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-14 04:26:51,395 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:16:05" (3/4) ... [2024-11-14 04:26:51,398 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-14 04:26:51,407 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 25 nodes and edges [2024-11-14 04:26:51,407 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2024-11-14 04:26:51,408 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-14 04:26:51,408 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-14 04:26:51,510 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/witness.graphml [2024-11-14 04:26:51,510 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/witness.yml [2024-11-14 04:26:51,511 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-14 04:26:51,511 INFO L158 Benchmark]: Toolchain (without parser) took 647405.83ms. Allocated memory was 117.4MB in the beginning and 687.9MB in the end (delta: 570.4MB). Free memory was 92.2MB in the beginning and 434.3MB in the end (delta: -342.1MB). Peak memory consumption was 228.9MB. Max. memory is 16.1GB. [2024-11-14 04:26:51,512 INFO L158 Benchmark]: CDTParser took 0.46ms. Allocated memory is still 117.4MB. Free memory is still 73.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 04:26:51,512 INFO L158 Benchmark]: CACSL2BoogieTranslator took 723.24ms. Allocated memory is still 117.4MB. Free memory was 92.0MB in the beginning and 74.3MB in the end (delta: 17.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 04:26:51,512 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.05ms. Allocated memory is still 117.4MB. Free memory was 74.3MB in the beginning and 72.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 04:26:51,512 INFO L158 Benchmark]: Boogie Preprocessor took 54.51ms. Allocated memory is still 117.4MB. Free memory was 72.6MB in the beginning and 71.3MB in the end (delta: 1.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 04:26:51,512 INFO L158 Benchmark]: RCFGBuilder took 846.52ms. Allocated memory is still 117.4MB. Free memory was 71.1MB in the beginning and 48.8MB in the end (delta: 22.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-14 04:26:51,513 INFO L158 Benchmark]: TraceAbstraction took 645582.59ms. Allocated memory was 117.4MB in the beginning and 687.9MB in the end (delta: 570.4MB). Free memory was 48.3MB in the beginning and 441.4MB in the end (delta: -393.1MB). Peak memory consumption was 186.9MB. Max. memory is 16.1GB. [2024-11-14 04:26:51,513 INFO L158 Benchmark]: Witness Printer took 116.64ms. Allocated memory is still 687.9MB. Free memory was 441.4MB in the beginning and 434.3MB in the end (delta: 7.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 04:26:51,514 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46ms. Allocated memory is still 117.4MB. Free memory is still 73.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 723.24ms. Allocated memory is still 117.4MB. Free memory was 92.0MB in the beginning and 74.3MB in the end (delta: 17.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.05ms. Allocated memory is still 117.4MB. Free memory was 74.3MB in the beginning and 72.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 54.51ms. Allocated memory is still 117.4MB. Free memory was 72.6MB in the beginning and 71.3MB in the end (delta: 1.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 846.52ms. Allocated memory is still 117.4MB. Free memory was 71.1MB in the beginning and 48.8MB in the end (delta: 22.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 645582.59ms. Allocated memory was 117.4MB in the beginning and 687.9MB in the end (delta: 570.4MB). Free memory was 48.3MB in the beginning and 441.4MB in the end (delta: -393.1MB). Peak memory consumption was 186.9MB. Max. memory is 16.1GB. * Witness Printer took 116.64ms. Allocated memory is still 687.9MB. Free memory was 441.4MB in the beginning and 434.3MB in the end (delta: 7.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 12]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 613]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 47 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 645.5s, OverallIterations: 34, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 63.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 46 mSolverCounterUnknown, 1224 SdHoareTripleChecker+Valid, 32.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1224 mSDsluCounter, 3966 SdHoareTripleChecker+Invalid, 30.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1070 IncrementalHoareTripleChecker+Unchecked, 3373 mSDsCounter, 155 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10500 IncrementalHoareTripleChecker+Invalid, 11771 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 155 mSolverCounterUnsat, 593 mSDtfsCounter, 10500 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2155 GetRequests, 1181 SyntacticMatches, 77 SemanticMatches, 897 ConstructedPredicates, 22 IntricatePredicates, 3 DeprecatedPredicates, 11557 ImplicationChecksByTransitivity, 530.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=32, InterpolantAutomatonStates: 338, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 34 MinimizatonAttempts, 124 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 122.7s InterpolantComputationTime, 1470 NumberOfCodeBlocks, 1445 NumberOfCodeBlocksAsserted, 61 NumberOfCheckSat, 1958 ConstructedInterpolants, 169 QuantifiedInterpolants, 27628 SizeOfPredicates, 98 NumberOfNonLiveVariables, 6199 ConjunctsInSsa, 838 ConjunctsInUnsatCore, 74 InterpolantComputations, 15 PerfectInterpolantSequences, 733/1215 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 3.3s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 19, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 72, TOOLS_POST_TIME: 2.4s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 72, TOOLS_QUANTIFIERELIM_TIME: 2.3s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.2s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 133, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 9, DOMAIN_WIDEN_TIME: 0.2s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 16, DOMAIN_ISSUBSETEQ_TIME: 0.5s, DOMAIN_ISBOTTOM_APPLICATIONS: 19, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 7, LOOP_SUMMARIZER_CACHE_MISSES: 7, LOOP_SUMMARIZER_OVERALL_TIME: 2.7s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 2.7s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 16, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 246, DAG_COMPRESSION_RETAINED_NODES: 80, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 21 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-11-14 04:26:51,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbce2644-4e31-43e2-9338-1cd16f0d8f02/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE