./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/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_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b3d7899c651fa61cfb9cf623e0f4ceb470fe32eb0d0272d2277c965ed07c2f88 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:35:36,240 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:35:36,315 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:35:36,322 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:35:36,322 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:35:36,365 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:35:36,369 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:35:36,369 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:35:36,370 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:35:36,370 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:35:36,370 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:35:36,370 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:35:36,371 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:35:36,371 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:35:36,371 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:35:36,371 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:35:36,371 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:35:36,371 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:35:36,371 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:35:36,372 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:35:36,372 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:35:36,372 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:35:36,372 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:35:36,372 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:35:36,375 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:35:36,375 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:35:36,375 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:35:36,375 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:35:36,375 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:35:36,375 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:35:36,375 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:35:36,376 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:35:36,376 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:35:36,376 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:35:36,376 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:35:36,376 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:35:36,376 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:35:36,376 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:35:36,376 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:35:36,377 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:35:36,377 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:35:36,377 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:35:36,377 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:35:36,377 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:35:36,377 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:35:36,377 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:35:36,377 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:35:36,377 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_d80876ae-8040-48eb-9f46-bd32853da1ee/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 ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3d7899c651fa61cfb9cf623e0f4ceb470fe32eb0d0272d2277c965ed07c2f88 [2024-11-14 03:35:36,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:35:36,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:35:36,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:35:36,771 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:35:36,771 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:35:36,773 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i Unable to find full path for "g++" [2024-11-14 03:35:38,690 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:35:39,076 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:35:39,077 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2024-11-14 03:35:39,089 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/data/32ce8ea13/67830a1f881c4f1d9596a3196979a561/FLAG7a02ef60a [2024-11-14 03:35:39,112 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/data/32ce8ea13/67830a1f881c4f1d9596a3196979a561 [2024-11-14 03:35:39,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:35:39,118 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:35:39,119 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:35:39,122 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:35:39,126 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:35:39,127 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:35:39" (1/1) ... [2024-11-14 03:35:39,128 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63674613 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:35:39, skipping insertion in model container [2024-11-14 03:35:39,128 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:35:39" (1/1) ... [2024-11-14 03:35:39,181 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:35:39,610 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i[24038,24051] [2024-11-14 03:35:39,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:35:39,629 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:35:39,743 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i[24038,24051] [2024-11-14 03:35:39,744 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:35:39,784 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:35:39,784 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:35:39 WrapperNode [2024-11-14 03:35:39,786 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:35:39,787 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:35:39,787 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:35:39,787 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:35:39,800 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:35:39" (1/1) ... [2024-11-14 03:35:39,819 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:35:39" (1/1) ... [2024-11-14 03:35:39,843 INFO L138 Inliner]: procedures = 126, calls = 30, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 100 [2024-11-14 03:35:39,843 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:35:39,844 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:35:39,844 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:35:39,844 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:35:39,852 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:35:39" (1/1) ... [2024-11-14 03:35:39,852 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:35:39" (1/1) ... [2024-11-14 03:35:39,855 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:35:39" (1/1) ... [2024-11-14 03:35:39,855 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:35:39" (1/1) ... [2024-11-14 03:35:39,866 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:35:39" (1/1) ... [2024-11-14 03:35:39,871 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:35:39" (1/1) ... [2024-11-14 03:35:39,876 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:35:39" (1/1) ... [2024-11-14 03:35:39,877 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:35:39" (1/1) ... [2024-11-14 03:35:39,879 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:35:39,882 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:35:39,883 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:35:39,883 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:35:39,884 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:35:39" (1/1) ... [2024-11-14 03:35:39,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:35:39,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:35:39,924 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:35:39,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:35:39,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 03:35:39,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-14 03:35:39,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:35:39,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 03:35:39,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-14 03:35:39,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-14 03:35:39,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 03:35:39,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-14 03:35:39,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:35:39,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:35:39,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:35:40,115 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:35:40,117 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:35:40,345 INFO L? ?]: Removed 31 outVars from TransFormulas that were not future-live. [2024-11-14 03:35:40,345 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:35:40,409 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:35:40,410 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-14 03:35:40,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:35:40 BoogieIcfgContainer [2024-11-14 03:35:40,410 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:35:40,413 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:35:40,413 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:35:40,419 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:35:40,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:35:39" (1/3) ... [2024-11-14 03:35:40,421 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10975391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:35:40, skipping insertion in model container [2024-11-14 03:35:40,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:35:39" (2/3) ... [2024-11-14 03:35:40,421 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10975391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:35:40, skipping insertion in model container [2024-11-14 03:35:40,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:35:40" (3/3) ... [2024-11-14 03:35:40,423 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all_reverse.i [2024-11-14 03:35:40,442 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:35:40,444 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG sll2n_remove_all_reverse.i that has 1 procedures, 15 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-14 03:35:40,512 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:35:40,533 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6db734e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:35:40,535 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 03:35:40,540 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 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 03:35:40,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 03:35:40,549 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:35:40,550 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 03:35:40,550 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:35:40,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:35:40,555 INFO L85 PathProgramCache]: Analyzing trace with hash 97552105, now seen corresponding path program 1 times [2024-11-14 03:35:40,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:35:40,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916228322] [2024-11-14 03:35:40,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:35:40,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:35:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:35:40,925 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 03:35:40,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:35:40,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916228322] [2024-11-14 03:35:40,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916228322] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:35:40,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:35:40,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:35:40,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219388550] [2024-11-14 03:35:40,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:35:40,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:35:40,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:35:40,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:35:40,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:35:40,970 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 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) 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 03:35:41,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:35:41,070 INFO L93 Difference]: Finished difference Result 29 states and 41 transitions. [2024-11-14 03:35:41,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:35:41,074 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 03:35:41,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:35:41,081 INFO L225 Difference]: With dead ends: 29 [2024-11-14 03:35:41,082 INFO L226 Difference]: Without dead ends: 14 [2024-11-14 03:35:41,086 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 03:35:41,092 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:35:41,093 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 26 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:35:41,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-14 03:35:41,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2024-11-14 03:35:41,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 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 03:35:41,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2024-11-14 03:35:41,133 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 5 [2024-11-14 03:35:41,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:35:41,133 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2024-11-14 03:35:41,134 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 03:35:41,134 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2024-11-14 03:35:41,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 03:35:41,134 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:35:41,134 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:35:41,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:35:41,138 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:35:41,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:35:41,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1575627433, now seen corresponding path program 1 times [2024-11-14 03:35:41,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:35:41,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735366850] [2024-11-14 03:35:41,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:35:41,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:35:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:35:41,318 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 03:35:41,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:35:41,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735366850] [2024-11-14 03:35:41,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735366850] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:35:41,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35075678] [2024-11-14 03:35:41,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:35:41,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:35:41,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:35:41,323 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:35:41,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:35:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:35:41,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 03:35:41,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:35:41,539 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 03:35:41,539 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:35:41,567 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 03:35:41,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35075678] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:35:41,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [684786429] [2024-11-14 03:35:41,597 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:35:41,598 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:35:41,602 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:35:41,607 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:35:41,609 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:35:43,307 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:35:43,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [684786429] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:35:43,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:35:43,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 7 [2024-11-14 03:35:43,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404309607] [2024-11-14 03:35:43,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:35:43,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:35:43,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:35:43,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:35:43,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:35:43,640 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:35:43,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:35:43,753 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2024-11-14 03:35:43,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:35:43,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 03:35:43,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:35:43,755 INFO L225 Difference]: With dead ends: 22 [2024-11-14 03:35:43,755 INFO L226 Difference]: Without dead ends: 19 [2024-11-14 03:35:43,756 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:35:43,757 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:35:43,757 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:35:43,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-14 03:35:43,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2024-11-14 03:35:43,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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 03:35:43,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2024-11-14 03:35:43,767 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 7 [2024-11-14 03:35:43,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:35:43,768 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2024-11-14 03:35:43,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:35:43,768 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2024-11-14 03:35:43,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 03:35:43,770 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:35:43,771 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:35:43,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:35:43,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:35:43,976 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:35:43,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:35:43,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1434191226, now seen corresponding path program 1 times [2024-11-14 03:35:43,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:35:43,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946008808] [2024-11-14 03:35:43,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:35:43,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:35:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:35:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:35:44,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:35:44,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946008808] [2024-11-14 03:35:44,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946008808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:35:44,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405663587] [2024-11-14 03:35:44,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:35:44,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:35:44,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:35:44,197 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:35:44,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:35:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:35:44,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 03:35:44,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:35:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:35:44,385 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:35:44,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:35:44,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405663587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:35:44,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1147459106] [2024-11-14 03:35:44,418 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 03:35:44,419 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:35:44,419 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:35:44,419 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:35:44,419 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:35:45,122 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:35:47,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1147459106] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:35:47,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:35:47,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 10 [2024-11-14 03:35:47,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879423993] [2024-11-14 03:35:47,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:35:47,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 03:35:47,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:35:47,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 03:35:47,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:35:47,812 INFO L87 Difference]: Start difference. First operand 14 states and 17 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 03:35:50,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:35:51,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:35:51,015 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2024-11-14 03:35:51,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 03:35:51,016 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 03:35:51,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:35:51,017 INFO L225 Difference]: With dead ends: 23 [2024-11-14 03:35:51,017 INFO L226 Difference]: Without dead ends: 20 [2024-11-14 03:35:51,017 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:35:51,018 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:35:51,019 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2024-11-14 03:35:51,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-14 03:35:51,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2024-11-14 03:35:51,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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 03:35:51,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2024-11-14 03:35:51,024 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2024-11-14 03:35:51,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:35:51,024 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2024-11-14 03:35:51,025 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 03:35:51,025 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2024-11-14 03:35:51,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-14 03:35:51,025 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:35:51,025 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:35:51,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 03:35:51,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:35:51,230 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:35:51,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:35:51,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1760794495, now seen corresponding path program 1 times [2024-11-14 03:35:51,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:35:51,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752015222] [2024-11-14 03:35:51,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:35:51,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:35:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:35:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:35:51,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:35:51,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752015222] [2024-11-14 03:35:51,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752015222] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:35:51,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924439417] [2024-11-14 03:35:51,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:35:51,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:35:51,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:35:51,494 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:35:51,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:35:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:35:51,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 03:35:51,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:35:51,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:35:51,709 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:35:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:35:51,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924439417] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:35:51,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2030881619] [2024-11-14 03:35:51,781 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-14 03:35:51,781 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:35:51,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:35:51,782 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:35:51,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:35:52,243 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:35:53,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2030881619] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:35:53,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:35:53,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 10 [2024-11-14 03:35:53,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25756351] [2024-11-14 03:35:53,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:35:53,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 03:35:53,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:35:53,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 03:35:53,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:35:53,155 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:35:53,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:35:53,397 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2024-11-14 03:35:53,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 03:35:53,398 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-14 03:35:53,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:35:53,399 INFO L225 Difference]: With dead ends: 34 [2024-11-14 03:35:53,400 INFO L226 Difference]: Without dead ends: 25 [2024-11-14 03:35:53,400 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:35:53,401 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:35:53,401 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:35:53,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-14 03:35:53,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2024-11-14 03:35:53,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 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 03:35:53,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2024-11-14 03:35:53,413 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 13 [2024-11-14 03:35:53,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:35:53,414 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2024-11-14 03:35:53,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:35:53,415 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2024-11-14 03:35:53,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 03:35:53,415 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:35:53,415 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:35:53,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 03:35:53,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:35:53,616 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:35:53,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:35:53,617 INFO L85 PathProgramCache]: Analyzing trace with hash -552866374, now seen corresponding path program 1 times [2024-11-14 03:35:53,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:35:53,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128234085] [2024-11-14 03:35:53,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:35:53,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:35:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:35:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 03:35:53,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:35:53,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128234085] [2024-11-14 03:35:53,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128234085] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:35:53,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528622783] [2024-11-14 03:35:53,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:35:53,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:35:53,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:35:53,838 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:35:53,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:35:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:35:53,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 03:35:53,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:35:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 03:35:54,039 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:35:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 03:35:54,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528622783] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:35:54,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1148677] [2024-11-14 03:35:54,106 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-14 03:35:54,106 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:35:54,107 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:35:54,107 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:35:54,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:35:57,354 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:36:03,417 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '525#(and (or (exists ((|v_ULTIMATE.start_main_~#s~0#1.offset_26| Int)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |v_ULTIMATE.start_main_~#s~0#1.offset_26|) 0))) (exists ((|v_ULTIMATE.start_main_~#s~0#1.offset_26| Int)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |v_ULTIMATE.start_main_~#s~0#1.offset_26|) 0)))) (exists ((|v_#memory_int_64| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_29| Int) (|v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_34| Int) (|v_#valid_52| (Array Int Int)) (|v_#memory_$Pointer$.offset_67| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~last~0#1.base_35| Int) (|v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_30| Int) (|v_#memory_$Pointer$.base_67| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.base_67| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_29| (store (select |v_#memory_$Pointer$.base_67| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_29|) (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_30| 4) 0)) |#memory_$Pointer$.base|) (= (store |v_#valid_52| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_35| 0) |#valid|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_67| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_29| (store (select |v_#memory_$Pointer$.offset_67| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_29|) (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_30| 4) 0))) (or (and (= (select (select |v_#memory_$Pointer$.offset_67| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_35|) (+ |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_34| 4)) 0) (= (select (select |v_#memory_$Pointer$.base_67| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_35|) (+ |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_34| 4)) 0) (exists ((|v_ULTIMATE.start_sll_remove_last_~head#1.base_21| Int) (|v_ULTIMATE.start_sll_remove_last_~head#1.offset_21| Int)) (and (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_29| (select (select |v_#memory_$Pointer$.base_67| |v_ULTIMATE.start_sll_remove_last_~head#1.base_21|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_21|)) (or (not (= (select (select |v_#memory_$Pointer$.base_67| (select (select |v_#memory_$Pointer$.base_67| |v_ULTIMATE.start_sll_remove_last_~head#1.base_21|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_21|)) (+ (select (select |v_#memory_$Pointer$.offset_67| |v_ULTIMATE.start_sll_remove_last_~head#1.base_21|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_21|) 4)) 0)) (not (= (select (select |v_#memory_$Pointer$.offset_67| (select (select |v_#memory_$Pointer$.base_67| |v_ULTIMATE.start_sll_remove_last_~head#1.base_21|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_21|)) (+ (select (select |v_#memory_$Pointer$.offset_67| |v_ULTIMATE.start_sll_remove_last_~head#1.base_21|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_21|) 4)) 0))) (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_30| (select (select |v_#memory_$Pointer$.offset_67| |v_ULTIMATE.start_sll_remove_last_~head#1.base_21|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_21|)) (= |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_34| (select (select |v_#memory_$Pointer$.offset_67| (select (select |v_#memory_$Pointer$.base_67| |v_ULTIMATE.start_sll_remove_last_~head#1.base_21|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_21|)) (+ (select (select |v_#memory_$Pointer$.offset_67| |v_ULTIMATE.start_sll_remove_last_~head#1.base_21|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_21|) 4))) (= (select (select |v_#memory_$Pointer$.base_67| (select (select |v_#memory_$Pointer$.base_67| |v_ULTIMATE.start_sll_remove_last_~head#1.base_21|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_21|)) (+ (select (select |v_#memory_$Pointer$.offset_67| |v_ULTIMATE.start_sll_remove_last_~head#1.base_21|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_21|) 4)) |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_35|)))) (and (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_30| 0) (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_29| 0) (= (select (select |v_#memory_$Pointer$.offset_67| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_35|) (+ |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_34| 4)) 0) (= (select (select |v_#memory_$Pointer$.base_67| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_35|) (+ |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_34| 4)) 0) (exists ((|v_ULTIMATE.start_sll_remove_last_~head#1.base_21| Int) (|v_ULTIMATE.start_sll_remove_last_~head#1.offset_21| Int)) (and (= |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_34| (select (select |v_#memory_$Pointer$.offset_67| |v_ULTIMATE.start_sll_remove_last_~head#1.base_21|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_21|)) (= |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_35| (select (select |v_#memory_$Pointer$.base_67| |v_ULTIMATE.start_sll_remove_last_~head#1.base_21|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_21|)))))) (= |#memory_int| (store |v_#memory_int_64| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_29| (store (select |v_#memory_int_64| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_29|) (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_30| 4) (select (select |#memory_int| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_29|) (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_30| 4))))))))' at error location [2024-11-14 03:36:03,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:36:03,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:36:03,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2024-11-14 03:36:03,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812841224] [2024-11-14 03:36:03,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:36:03,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:36:03,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:36:03,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:36:03,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=168, Unknown=3, NotChecked=0, Total=210 [2024-11-14 03:36:03,420 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 03:36:03,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:36:03,507 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2024-11-14 03:36:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:36:03,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 15 [2024-11-14 03:36:03,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:36:03,509 INFO L225 Difference]: With dead ends: 38 [2024-11-14 03:36:03,510 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 03:36:03,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=39, Invalid=168, Unknown=3, NotChecked=0, Total=210 [2024-11-14 03:36:03,511 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:36:03,512 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:36:03,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 03:36:03,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-14 03:36:03,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 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 03:36:03,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2024-11-14 03:36:03,519 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 15 [2024-11-14 03:36:03,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:36:03,519 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2024-11-14 03:36:03,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 03:36:03,519 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2024-11-14 03:36:03,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 03:36:03,520 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:36:03,520 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:36:03,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 03:36:03,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:03,721 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:36:03,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:36:03,721 INFO L85 PathProgramCache]: Analyzing trace with hash -180625030, now seen corresponding path program 2 times [2024-11-14 03:36:03,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:36:03,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839595395] [2024-11-14 03:36:03,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:36:03,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:36:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:36:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:36:03,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:36:03,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839595395] [2024-11-14 03:36:03,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839595395] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:36:03,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376512484] [2024-11-14 03:36:03,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:36:03,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:03,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:36:03,957 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:36:03,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:36:04,073 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 03:36:04,073 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:36:04,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 03:36:04,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:36:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:36:04,194 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:36:04,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:36:04,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376512484] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:36:04,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1708284397] [2024-11-14 03:36:04,310 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-14 03:36:04,311 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:36:04,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:36:04,311 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:36:04,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:36:05,489 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:36:06,004 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58| Int) (|v_#valid_65| (Array Int Int)) (|v_#memory_$Pointer$.base_82| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_56| Int) (|v_#memory_int_79| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49| Int) (|v_#memory_$Pointer$.offset_82| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_51| Int)) (let ((.cse0 (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_51| 4))) (and (= |c_#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_82| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49| (store (select |v_#memory_$Pointer$.offset_82| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49|) .cse0 0))) (= (store |v_#memory_int_79| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49| (store (select |v_#memory_int_79| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49|) .cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49|) .cse0))) |c_#memory_int|) (= |c_#valid| (store |v_#valid_65| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58| 0)) (= |c_#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49| (store (select |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49|) .cse0 0))) (let ((.cse6 (+ |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_56| 4))) (let ((.cse4 (= (select (select |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58|) .cse6) 0)) (.cse5 (= (select (select |v_#memory_$Pointer$.offset_82| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58|) .cse6) 0))) (or (and (exists ((|v_ULTIMATE.start_sll_remove_last_~head#1.base_28| Int) (|v_ULTIMATE.start_sll_remove_last_~head#1.offset_28| Int)) (let ((.cse1 (select (select |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~head#1.base_28|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_28|))) (let ((.cse2 (select (select |v_#memory_$Pointer$.offset_82| .cse1) .cse0)) (.cse3 (select (select |v_#memory_$Pointer$.base_82| .cse1) .cse0))) (and (= .cse1 |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49|) (= |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_56| .cse2) (or (not (= .cse2 0)) (not (= .cse3 0))) (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_51| (select (select |v_#memory_$Pointer$.offset_82| |v_ULTIMATE.start_sll_remove_last_~head#1.base_28|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_28|)) (= |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58| .cse3))))) .cse4 .cse5) (and (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49| 0) .cse4 (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_51| 0) .cse5 (exists ((|v_ULTIMATE.start_sll_remove_last_~head#1.base_28| Int) (|v_ULTIMATE.start_sll_remove_last_~head#1.offset_28| Int)) (and (= |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_56| (select (select |v_#memory_$Pointer$.offset_82| |v_ULTIMATE.start_sll_remove_last_~head#1.base_28|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_28|)) (= (select (select |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~head#1.base_28|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_28|) |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58|)))))))))) (and (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 1 |c_#StackHeapBarrier|) (<= 2 |c_ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= |c_ULTIMATE.start_main_~i~0#1| 1))) is different from true [2024-11-14 03:36:06,510 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58| Int) (|v_#valid_65| (Array Int Int)) (|v_#memory_$Pointer$.base_82| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_56| Int) (|v_#memory_int_79| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49| Int) (|v_#memory_$Pointer$.offset_82| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_51| Int)) (let ((.cse0 (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_51| 4))) (and (= |c_#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_82| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49| (store (select |v_#memory_$Pointer$.offset_82| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49|) .cse0 0))) (= (store |v_#memory_int_79| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49| (store (select |v_#memory_int_79| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49|) .cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49|) .cse0))) |c_#memory_int|) (= |c_#valid| (store |v_#valid_65| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58| 0)) (= |c_#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49| (store (select |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49|) .cse0 0))) (let ((.cse6 (+ |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_56| 4))) (let ((.cse4 (= (select (select |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58|) .cse6) 0)) (.cse5 (= (select (select |v_#memory_$Pointer$.offset_82| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58|) .cse6) 0))) (or (and (exists ((|v_ULTIMATE.start_sll_remove_last_~head#1.base_28| Int) (|v_ULTIMATE.start_sll_remove_last_~head#1.offset_28| Int)) (let ((.cse1 (select (select |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~head#1.base_28|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_28|))) (let ((.cse2 (select (select |v_#memory_$Pointer$.offset_82| .cse1) .cse0)) (.cse3 (select (select |v_#memory_$Pointer$.base_82| .cse1) .cse0))) (and (= .cse1 |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49|) (= |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_56| .cse2) (or (not (= .cse2 0)) (not (= .cse3 0))) (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_51| (select (select |v_#memory_$Pointer$.offset_82| |v_ULTIMATE.start_sll_remove_last_~head#1.base_28|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_28|)) (= |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58| .cse3))))) .cse4 .cse5) (and (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49| 0) .cse4 (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_51| 0) .cse5 (exists ((|v_ULTIMATE.start_sll_remove_last_~head#1.base_28| Int) (|v_ULTIMATE.start_sll_remove_last_~head#1.offset_28| Int)) (and (= |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_56| (select (select |v_#memory_$Pointer$.offset_82| |v_ULTIMATE.start_sll_remove_last_~head#1.base_28|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_28|)) (= (select (select |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~head#1.base_28|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_28|) |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58|)))))))))) is different from true [2024-11-14 03:36:06,522 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58| Int) (|v_#valid_65| (Array Int Int)) (|v_#memory_$Pointer$.base_82| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_56| Int) (|v_#memory_int_79| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49| Int) (|v_#memory_$Pointer$.offset_82| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_51| Int)) (let ((.cse0 (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_51| 4))) (and (= |c_#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_82| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49| (store (select |v_#memory_$Pointer$.offset_82| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49|) .cse0 0))) (= (store |v_#memory_int_79| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49| (store (select |v_#memory_int_79| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49|) .cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49|) .cse0))) |c_#memory_int|) (= |c_#valid| (store |v_#valid_65| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58| 0)) (= |c_#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49| (store (select |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49|) .cse0 0))) (let ((.cse6 (+ |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_56| 4))) (let ((.cse4 (= (select (select |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58|) .cse6) 0)) (.cse5 (= (select (select |v_#memory_$Pointer$.offset_82| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58|) .cse6) 0))) (or (and (exists ((|v_ULTIMATE.start_sll_remove_last_~head#1.base_28| Int) (|v_ULTIMATE.start_sll_remove_last_~head#1.offset_28| Int)) (let ((.cse1 (select (select |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~head#1.base_28|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_28|))) (let ((.cse2 (select (select |v_#memory_$Pointer$.offset_82| .cse1) .cse0)) (.cse3 (select (select |v_#memory_$Pointer$.base_82| .cse1) .cse0))) (and (= .cse1 |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49|) (= |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_56| .cse2) (or (not (= .cse2 0)) (not (= .cse3 0))) (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_51| (select (select |v_#memory_$Pointer$.offset_82| |v_ULTIMATE.start_sll_remove_last_~head#1.base_28|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_28|)) (= |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58| .cse3))))) .cse4 .cse5) (and (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49| 0) .cse4 (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_51| 0) .cse5 (exists ((|v_ULTIMATE.start_sll_remove_last_~head#1.base_28| Int) (|v_ULTIMATE.start_sll_remove_last_~head#1.offset_28| Int)) (and (= |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_56| (select (select |v_#memory_$Pointer$.offset_82| |v_ULTIMATE.start_sll_remove_last_~head#1.base_28|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_28|)) (= (select (select |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~head#1.base_28|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_28|) |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58|)))))))))) (exists ((|v_ULTIMATE.start_main_~#s~0#1.offset_27| Int)) (and (= |c_ULTIMATE.start_main_#t~mem14#1.offset| (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |v_ULTIMATE.start_main_~#s~0#1.offset_27|)) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |v_ULTIMATE.start_main_~#s~0#1.offset_27|) |c_ULTIMATE.start_main_#t~mem14#1.base|)))) is different from true [2024-11-14 03:36:06,523 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '719#(and (or (exists ((|v_ULTIMATE.start_main_~#s~0#1.offset_27| Int)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |v_ULTIMATE.start_main_~#s~0#1.offset_27|) 0))) (exists ((|v_ULTIMATE.start_main_~#s~0#1.offset_27| Int)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |v_ULTIMATE.start_main_~#s~0#1.offset_27|) 0)))) (exists ((|v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58| Int) (|v_#valid_65| (Array Int Int)) (|v_#memory_$Pointer$.base_82| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_56| Int) (|v_#memory_int_79| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49| Int) (|v_#memory_$Pointer$.offset_82| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_51| Int)) (and (= (store |v_#memory_int_79| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49| (store (select |v_#memory_int_79| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49|) (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_51| 4) (select (select |#memory_int| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49|) (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_51| 4)))) |#memory_int|) (= (store |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49| (store (select |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49|) (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_51| 4) 0)) |#memory_$Pointer$.base|) (= (store |v_#valid_65| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58| 0) |#valid|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_82| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49| (store (select |v_#memory_$Pointer$.offset_82| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49|) (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_51| 4) 0))) (or (and (exists ((|v_ULTIMATE.start_sll_remove_last_~head#1.base_28| Int) (|v_ULTIMATE.start_sll_remove_last_~head#1.offset_28| Int)) (and (= (select (select |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~head#1.base_28|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_28|) |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49|) (= |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_56| (select (select |v_#memory_$Pointer$.offset_82| (select (select |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~head#1.base_28|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_28|)) (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_51| 4))) (or (not (= (select (select |v_#memory_$Pointer$.offset_82| (select (select |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~head#1.base_28|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_28|)) (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_51| 4)) 0)) (not (= (select (select |v_#memory_$Pointer$.base_82| (select (select |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~head#1.base_28|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_28|)) (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_51| 4)) 0))) (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_51| (select (select |v_#memory_$Pointer$.offset_82| |v_ULTIMATE.start_sll_remove_last_~head#1.base_28|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_28|)) (= |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58| (select (select |v_#memory_$Pointer$.base_82| (select (select |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~head#1.base_28|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_28|)) (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_51| 4))))) (= (select (select |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58|) (+ |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_56| 4)) 0) (= (select (select |v_#memory_$Pointer$.offset_82| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58|) (+ |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_56| 4)) 0)) (and (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_49| 0) (= (select (select |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58|) (+ |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_56| 4)) 0) (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_51| 0) (= (select (select |v_#memory_$Pointer$.offset_82| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58|) (+ |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_56| 4)) 0) (exists ((|v_ULTIMATE.start_sll_remove_last_~head#1.base_28| Int) (|v_ULTIMATE.start_sll_remove_last_~head#1.offset_28| Int)) (and (= |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_56| (select (select |v_#memory_$Pointer$.offset_82| |v_ULTIMATE.start_sll_remove_last_~head#1.base_28|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_28|)) (= (select (select |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_remove_last_~head#1.base_28|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_28|) |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_58|))))))))' at error location [2024-11-14 03:36:06,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:36:06,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:36:06,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-14 03:36:06,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600417434] [2024-11-14 03:36:06,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:36:06,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:36:06,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:36:06,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:36:06,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=119, Unknown=9, NotChecked=72, Total=240 [2024-11-14 03:36:06,525 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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 03:36:06,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:36:06,592 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2024-11-14 03:36:06,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:36:06,593 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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 03:36:06,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:36:06,594 INFO L225 Difference]: With dead ends: 32 [2024-11-14 03:36:06,594 INFO L226 Difference]: Without dead ends: 29 [2024-11-14 03:36:06,594 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=40, Invalid=119, Unknown=9, NotChecked=72, Total=240 [2024-11-14 03:36:06,595 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:36:06,596 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:36:06,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-14 03:36:06,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-11-14 03:36:06,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:36:06,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-11-14 03:36:06,602 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2024-11-14 03:36:06,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:36:06,603 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-11-14 03:36:06,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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 03:36:06,603 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-11-14 03:36:06,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 03:36:06,604 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:36:06,604 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:36:06,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:36:06,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:06,805 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:36:06,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:36:06,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1555705380, now seen corresponding path program 1 times [2024-11-14 03:36:06,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:36:06,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777970836] [2024-11-14 03:36:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:36:06,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:36:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:36:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:36:07,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:36:07,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777970836] [2024-11-14 03:36:07,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777970836] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:36:07,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073368995] [2024-11-14 03:36:07,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:36:07,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:07,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:36:07,616 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:36:07,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:36:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:36:07,766 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-14 03:36:07,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:36:07,861 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 11 treesize of output 7 [2024-11-14 03:36:07,878 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 11 treesize of output 7 [2024-11-14 03:36:08,126 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 03:36:08,145 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 03:36:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:36:08,200 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:36:08,302 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_387 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base| v_ArrVal_387) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0)) (forall ((v_ArrVal_386 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base| v_ArrVal_386) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0))) is different from false [2024-11-14 03:36:08,465 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:36:08,465 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 18 treesize of output 19 [2024-11-14 03:36:08,500 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:36:08,501 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 30 treesize of output 33 [2024-11-14 03:36:08,532 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 5 treesize of output 3 [2024-11-14 03:36:08,551 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-14 03:36:08,551 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 18 treesize of output 1 [2024-11-14 03:36:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:36:08,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073368995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:36:08,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1756335078] [2024-11-14 03:36:08,595 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-14 03:36:08,595 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:36:08,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:36:08,597 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:36:08,597 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:36:09,087 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:36:12,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1756335078] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:36:12,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:36:12,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 6, 7] total 19 [2024-11-14 03:36:12,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815449766] [2024-11-14 03:36:12,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:36:12,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 03:36:12,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:36:12,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 03:36:12,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=265, Unknown=7, NotChecked=34, Total=380 [2024-11-14 03:36:12,991 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:36:15,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:36:16,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:36:16,090 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2024-11-14 03:36:16,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 03:36:16,091 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-14 03:36:16,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:36:16,092 INFO L225 Difference]: With dead ends: 41 [2024-11-14 03:36:16,092 INFO L226 Difference]: Without dead ends: 32 [2024-11-14 03:36:16,092 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=74, Invalid=265, Unknown=7, NotChecked=34, Total=380 [2024-11-14 03:36:16,093 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:36:16,093 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 25 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2024-11-14 03:36:16,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-14 03:36:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2024-11-14 03:36:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:36:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-11-14 03:36:16,103 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2024-11-14 03:36:16,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:36:16,104 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-11-14 03:36:16,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:36:16,104 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-11-14 03:36:16,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 03:36:16,105 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:36:16,105 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:36:16,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:36:16,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:16,305 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:36:16,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:36:16,306 INFO L85 PathProgramCache]: Analyzing trace with hash -843512617, now seen corresponding path program 1 times [2024-11-14 03:36:16,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:36:16,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734026746] [2024-11-14 03:36:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:36:16,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:36:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:36:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:36:17,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:36:17,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734026746] [2024-11-14 03:36:17,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734026746] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:36:17,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536736272] [2024-11-14 03:36:17,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:36:17,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:17,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:36:17,152 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:36:17,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:36:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:36:17,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-14 03:36:17,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:36:17,456 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 03:36:17,480 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 03:36:17,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:36:17,991 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 03:36:18,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:36:18,002 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 03:36:18,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:36:18,051 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:36:18,101 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_492 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base| v_ArrVal_492) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0)) (forall ((v_ArrVal_491 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base| v_ArrVal_491) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0))) is different from false [2024-11-14 03:36:18,385 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_remove_last_~head#1.base|) |c_ULTIMATE.start_sll_remove_last_~head#1.offset|))) (and (forall ((|v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_61| Int) (v_ArrVal_491 (Array Int Int))) (or (= (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_61| v_ArrVal_491) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0) (< .cse0 |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_61|))) (forall ((v_ArrVal_492 (Array Int Int)) (|v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_61| Int)) (or (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_61| v_ArrVal_492) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0) (< .cse0 |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_61|))))) is different from false [2024-11-14 03:36:18,426 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (and (forall ((v_ArrVal_492 (Array Int Int)) (|v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_61| Int)) (or (< .cse0 |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_61|) (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_61| v_ArrVal_492) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0))) (forall ((|v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_61| Int) (v_ArrVal_491 (Array Int Int))) (or (< .cse0 |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_61|) (= (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_61| v_ArrVal_491) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0))))) is different from false [2024-11-14 03:36:18,477 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:36:18,477 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 18 treesize of output 19 [2024-11-14 03:36:18,497 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 28 treesize of output 24 [2024-11-14 03:36:18,541 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:36:18,541 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 30 treesize of output 33 [2024-11-14 03:36:18,551 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 7 [2024-11-14 03:36:18,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:36:18,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:36:18,639 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-14 03:36:18,639 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 22 treesize of output 1 [2024-11-14 03:36:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 6 not checked. [2024-11-14 03:36:18,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536736272] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:36:18,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1838464746] [2024-11-14 03:36:18,834 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-14 03:36:18,835 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:36:18,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:36:18,835 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:36:18,835 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:36:19,331 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:36:20,613 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1161#(and (<= 1 |#StackHeapBarrier|) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0))) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2024-11-14 03:36:20,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:36:20,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:36:20,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 21 [2024-11-14 03:36:20,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893877316] [2024-11-14 03:36:20,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:36:20,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-14 03:36:20,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:36:20,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-14 03:36:20,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=570, Unknown=11, NotChecked=156, Total=870 [2024-11-14 03:36:20,616 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 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 03:36:21,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:36:21,294 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2024-11-14 03:36:21,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 03:36:21,295 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 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 20 [2024-11-14 03:36:21,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:36:21,296 INFO L225 Difference]: With dead ends: 44 [2024-11-14 03:36:21,296 INFO L226 Difference]: Without dead ends: 24 [2024-11-14 03:36:21,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=152, Invalid=661, Unknown=11, NotChecked=168, Total=992 [2024-11-14 03:36:21,298 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:36:21,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 62 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 89 Unchecked, 0.4s Time] [2024-11-14 03:36:21,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-14 03:36:21,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-14 03:36:21,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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 03:36:21,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-14 03:36:21,307 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 20 [2024-11-14 03:36:21,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:36:21,307 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-14 03:36:21,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 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 03:36:21,307 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-14 03:36:21,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 03:36:21,308 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:36:21,308 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 03:36:21,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:36:21,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:21,508 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:36:21,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:36:21,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1570450832, now seen corresponding path program 3 times [2024-11-14 03:36:21,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:36:21,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578293] [2024-11-14 03:36:21,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:36:21,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:36:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:36:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:36:22,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:36:22,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578293] [2024-11-14 03:36:22,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578293] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:36:22,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545606977] [2024-11-14 03:36:22,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:36:22,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:22,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:36:22,692 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:36:22,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:36:22,853 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:36:22,853 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:36:22,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-14 03:36:22,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:36:23,539 INFO L349 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2024-11-14 03:36:23,539 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 59 treesize of output 59 [2024-11-14 03:36:23,642 INFO L349 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2024-11-14 03:36:23,642 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 54 [2024-11-14 03:36:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:36:24,591 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:36:24,874 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_597 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base| v_ArrVal_597) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0)) (forall ((v_ArrVal_598 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base| v_ArrVal_598) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0))) is different from false [2024-11-14 03:36:25,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 03:36:25,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545606977] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 03:36:25,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:36:25,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 13] total 28 [2024-11-14 03:36:25,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267207748] [2024-11-14 03:36:25,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:36:25,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 03:36:25,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:36:25,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 03:36:25,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=628, Unknown=2, NotChecked=50, Total=756 [2024-11-14 03:36:25,405 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 03:36:25,742 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_597 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base| v_ArrVal_597) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0))) (.cse1 (forall ((v_ArrVal_598 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base| v_ArrVal_598) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0)))) (let ((.cse3 (and .cse0 .cse1))) (and .cse0 .cse1 (let ((.cse2 (+ |c_ULTIMATE.start_sll_remove_last_~last~0#1.offset| 4))) (or (not (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_remove_last_~last~0#1.base|) .cse2) 0)) .cse3 (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_remove_last_~last~0#1.base|) .cse2) 0)))) (or (not (= |c_ULTIMATE.start_sll_remove_last_#t~mem10#1.base| 0)) .cse3 (not (= |c_ULTIMATE.start_sll_remove_last_#t~mem10#1.offset| 0)))))) is different from false [2024-11-14 03:36:26,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:36:26,378 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2024-11-14 03:36:26,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 03:36:26,379 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 23 [2024-11-14 03:36:26,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:36:26,380 INFO L225 Difference]: With dead ends: 39 [2024-11-14 03:36:26,380 INFO L226 Difference]: Without dead ends: 26 [2024-11-14 03:36:26,380 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=115, Invalid=882, Unknown=3, NotChecked=122, Total=1122 [2024-11-14 03:36:26,381 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:36:26,381 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 37 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 9 Unknown, 29 Unchecked, 0.4s Time] [2024-11-14 03:36:26,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-14 03:36:26,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-14 03:36:26,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 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 03:36:26,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-11-14 03:36:26,391 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 23 [2024-11-14 03:36:26,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:36:26,391 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-11-14 03:36:26,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 03:36:26,392 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-11-14 03:36:26,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-14 03:36:26,392 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:36:26,392 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-14 03:36:26,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 03:36:26,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:26,593 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:36:26,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:36:26,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1210467211, now seen corresponding path program 4 times [2024-11-14 03:36:26,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:36:26,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307050049] [2024-11-14 03:36:26,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:36:26,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:36:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:36:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:36:28,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:36:28,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307050049] [2024-11-14 03:36:28,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307050049] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:36:28,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883150483] [2024-11-14 03:36:28,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:36:28,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:28,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:36:28,101 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:36:28,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:36:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:36:28,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-14 03:36:28,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:36:29,770 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-11-14 03:36:29,771 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 60 treesize of output 46 [2024-11-14 03:36:29,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:36:29,789 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2024-11-14 03:36:30,363 INFO L349 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2024-11-14 03:36:30,363 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 64 treesize of output 34 [2024-11-14 03:36:30,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:36:30,380 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:36:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:36:30,484 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:36:31,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:36:31,333 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 154 treesize of output 137 [2024-11-14 03:36:31,933 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:36:31,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 295 treesize of output 268 [2024-11-14 03:36:33,716 INFO L349 Elim1Store]: treesize reduction 14, result has 54.8 percent of original size [2024-11-14 03:36:33,716 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 160 treesize of output 112 [2024-11-14 03:36:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:36:34,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883150483] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:36:34,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1691271123] [2024-11-14 03:36:34,435 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-14 03:36:34,435 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:36:34,436 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:36:34,436 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:36:34,436 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:36:39,261 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:36:40,365 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_#memory_$Pointer$.base_141| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_101| Int) (|v_#memory_int_132| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99| Int) (|v_#memory_$Pointer$.offset_142| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_110| Int) (|v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110| Int) (|v_#valid_108| (Array Int Int))) (let ((.cse0 (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_101| 4))) (and (= (store |v_#memory_int_132| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99| (store (select |v_#memory_int_132| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99|) .cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99|) .cse0))) |c_#memory_int|) (= |c_#valid| (store |v_#valid_108| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110| 0)) (= (store |v_#memory_$Pointer$.offset_142| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99| (store (select |v_#memory_$Pointer$.offset_142| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99|) .cse0 0)) |c_#memory_$Pointer$.offset|) (let ((.cse6 (+ |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_110| 4))) (let ((.cse1 (= (select (select |v_#memory_$Pointer$.offset_142| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110|) .cse6) 0)) (.cse2 (= (select (select |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110|) .cse6) 0))) (or (and .cse1 .cse2 (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_101| 0) (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99| 0) (exists ((|v_ULTIMATE.start_sll_remove_last_~head#1.base_65| Int) (|v_ULTIMATE.start_sll_remove_last_~head#1.offset_65| Int)) (and (= (select (select |v_#memory_$Pointer$.offset_142| |v_ULTIMATE.start_sll_remove_last_~head#1.base_65|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_65|) |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_110|) (= (select (select |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~head#1.base_65|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_65|) |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110|)))) (and (exists ((|v_ULTIMATE.start_sll_remove_last_~head#1.base_65| Int) (|v_ULTIMATE.start_sll_remove_last_~head#1.offset_65| Int)) (let ((.cse5 (select (select |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~head#1.base_65|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_65|))) (let ((.cse3 (select (select |v_#memory_$Pointer$.offset_142| .cse5) .cse0)) (.cse4 (select (select |v_#memory_$Pointer$.base_141| .cse5) .cse0))) (and (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_101| (select (select |v_#memory_$Pointer$.offset_142| |v_ULTIMATE.start_sll_remove_last_~head#1.base_65|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_65|)) (or (not (= .cse3 0)) (not (= .cse4 0))) (= .cse5 |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99|) (= .cse3 |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_110|) (= .cse4 |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110|))))) .cse1 .cse2)))) (= (store |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99| (store (select |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99|) .cse0 0)) |c_#memory_$Pointer$.base|)))) (and (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 1 |c_#StackHeapBarrier|) (<= 2 |c_ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= |c_ULTIMATE.start_main_~i~0#1| 1))) is different from true [2024-11-14 03:36:41,313 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_#memory_$Pointer$.base_141| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_101| Int) (|v_#memory_int_132| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99| Int) (|v_#memory_$Pointer$.offset_142| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_110| Int) (|v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110| Int) (|v_#valid_108| (Array Int Int))) (let ((.cse0 (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_101| 4))) (and (= (store |v_#memory_int_132| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99| (store (select |v_#memory_int_132| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99|) .cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99|) .cse0))) |c_#memory_int|) (= |c_#valid| (store |v_#valid_108| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110| 0)) (= (store |v_#memory_$Pointer$.offset_142| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99| (store (select |v_#memory_$Pointer$.offset_142| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99|) .cse0 0)) |c_#memory_$Pointer$.offset|) (let ((.cse6 (+ |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_110| 4))) (let ((.cse1 (= (select (select |v_#memory_$Pointer$.offset_142| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110|) .cse6) 0)) (.cse2 (= (select (select |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110|) .cse6) 0))) (or (and .cse1 .cse2 (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_101| 0) (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99| 0) (exists ((|v_ULTIMATE.start_sll_remove_last_~head#1.base_65| Int) (|v_ULTIMATE.start_sll_remove_last_~head#1.offset_65| Int)) (and (= (select (select |v_#memory_$Pointer$.offset_142| |v_ULTIMATE.start_sll_remove_last_~head#1.base_65|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_65|) |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_110|) (= (select (select |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~head#1.base_65|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_65|) |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110|)))) (and (exists ((|v_ULTIMATE.start_sll_remove_last_~head#1.base_65| Int) (|v_ULTIMATE.start_sll_remove_last_~head#1.offset_65| Int)) (let ((.cse5 (select (select |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~head#1.base_65|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_65|))) (let ((.cse3 (select (select |v_#memory_$Pointer$.offset_142| .cse5) .cse0)) (.cse4 (select (select |v_#memory_$Pointer$.base_141| .cse5) .cse0))) (and (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_101| (select (select |v_#memory_$Pointer$.offset_142| |v_ULTIMATE.start_sll_remove_last_~head#1.base_65|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_65|)) (or (not (= .cse3 0)) (not (= .cse4 0))) (= .cse5 |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99|) (= .cse3 |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_110|) (= .cse4 |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110|))))) .cse1 .cse2)))) (= (store |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99| (store (select |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99|) .cse0 0)) |c_#memory_$Pointer$.base|)))) is different from true [2024-11-14 03:36:41,324 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#s~0#1.offset_32| Int)) (and (= |c_ULTIMATE.start_main_#t~mem14#1.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |v_ULTIMATE.start_main_~#s~0#1.offset_32|)) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |v_ULTIMATE.start_main_~#s~0#1.offset_32|) |c_ULTIMATE.start_main_#t~mem14#1.offset|))) (exists ((|v_#memory_$Pointer$.base_141| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_101| Int) (|v_#memory_int_132| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99| Int) (|v_#memory_$Pointer$.offset_142| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_110| Int) (|v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110| Int) (|v_#valid_108| (Array Int Int))) (let ((.cse0 (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_101| 4))) (and (= (store |v_#memory_int_132| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99| (store (select |v_#memory_int_132| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99|) .cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99|) .cse0))) |c_#memory_int|) (= |c_#valid| (store |v_#valid_108| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110| 0)) (= (store |v_#memory_$Pointer$.offset_142| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99| (store (select |v_#memory_$Pointer$.offset_142| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99|) .cse0 0)) |c_#memory_$Pointer$.offset|) (let ((.cse6 (+ |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_110| 4))) (let ((.cse1 (= (select (select |v_#memory_$Pointer$.offset_142| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110|) .cse6) 0)) (.cse2 (= (select (select |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110|) .cse6) 0))) (or (and .cse1 .cse2 (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_101| 0) (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99| 0) (exists ((|v_ULTIMATE.start_sll_remove_last_~head#1.base_65| Int) (|v_ULTIMATE.start_sll_remove_last_~head#1.offset_65| Int)) (and (= (select (select |v_#memory_$Pointer$.offset_142| |v_ULTIMATE.start_sll_remove_last_~head#1.base_65|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_65|) |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_110|) (= (select (select |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~head#1.base_65|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_65|) |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110|)))) (and (exists ((|v_ULTIMATE.start_sll_remove_last_~head#1.base_65| Int) (|v_ULTIMATE.start_sll_remove_last_~head#1.offset_65| Int)) (let ((.cse5 (select (select |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~head#1.base_65|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_65|))) (let ((.cse3 (select (select |v_#memory_$Pointer$.offset_142| .cse5) .cse0)) (.cse4 (select (select |v_#memory_$Pointer$.base_141| .cse5) .cse0))) (and (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_101| (select (select |v_#memory_$Pointer$.offset_142| |v_ULTIMATE.start_sll_remove_last_~head#1.base_65|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_65|)) (or (not (= .cse3 0)) (not (= .cse4 0))) (= .cse5 |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99|) (= .cse3 |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_110|) (= .cse4 |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110|))))) .cse1 .cse2)))) (= (store |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99| (store (select |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99|) .cse0 0)) |c_#memory_$Pointer$.base|))))) is different from true [2024-11-14 03:36:41,325 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1707#(and (exists ((|v_#memory_$Pointer$.base_141| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_101| Int) (|v_#memory_int_132| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99| Int) (|v_#memory_$Pointer$.offset_142| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_110| Int) (|v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110| Int) (|v_#valid_108| (Array Int Int))) (and (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_142| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99| (store (select |v_#memory_$Pointer$.offset_142| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99|) (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_101| 4) 0))) (or (and (= (select (select |v_#memory_$Pointer$.offset_142| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110|) (+ |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_110| 4)) 0) (= (select (select |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110|) (+ |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_110| 4)) 0) (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_101| 0) (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99| 0) (exists ((|v_ULTIMATE.start_sll_remove_last_~head#1.base_65| Int) (|v_ULTIMATE.start_sll_remove_last_~head#1.offset_65| Int)) (and (= (select (select |v_#memory_$Pointer$.offset_142| |v_ULTIMATE.start_sll_remove_last_~head#1.base_65|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_65|) |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_110|) (= (select (select |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~head#1.base_65|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_65|) |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110|)))) (and (exists ((|v_ULTIMATE.start_sll_remove_last_~head#1.base_65| Int) (|v_ULTIMATE.start_sll_remove_last_~head#1.offset_65| Int)) (and (= |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_101| (select (select |v_#memory_$Pointer$.offset_142| |v_ULTIMATE.start_sll_remove_last_~head#1.base_65|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_65|)) (or (not (= (select (select |v_#memory_$Pointer$.offset_142| (select (select |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~head#1.base_65|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_65|)) (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_101| 4)) 0)) (not (= (select (select |v_#memory_$Pointer$.base_141| (select (select |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~head#1.base_65|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_65|)) (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_101| 4)) 0))) (= (select (select |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~head#1.base_65|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_65|) |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99|) (= (select (select |v_#memory_$Pointer$.offset_142| (select (select |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~head#1.base_65|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_65|)) (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_101| 4)) |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_110|) (= (select (select |v_#memory_$Pointer$.base_141| (select (select |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~head#1.base_65|) |v_ULTIMATE.start_sll_remove_last_~head#1.offset_65|)) (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_101| 4)) |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110|))) (= (select (select |v_#memory_$Pointer$.offset_142| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110|) (+ |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_110| 4)) 0) (= (select (select |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110|) (+ |v_ULTIMATE.start_sll_remove_last_~last~0#1.offset_110| 4)) 0))) (= (store |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99| (store (select |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99|) (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_101| 4) 0)) |#memory_$Pointer$.base|) (= |#valid| (store |v_#valid_108| |v_ULTIMATE.start_sll_remove_last_~last~0#1.base_110| 0)) (= |#memory_int| (store |v_#memory_int_132| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99| (store (select |v_#memory_int_132| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99|) (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_101| 4) (select (select |#memory_int| |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base_99|) (+ |v_ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset_101| 4))))))) (or (exists ((|v_ULTIMATE.start_main_~#s~0#1.offset_32| Int)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |v_ULTIMATE.start_main_~#s~0#1.offset_32|) 0))) (exists ((|v_ULTIMATE.start_main_~#s~0#1.offset_32| Int)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |v_ULTIMATE.start_main_~#s~0#1.offset_32|) 0)))))' at error location [2024-11-14 03:36:41,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:36:41,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:36:41,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 34 [2024-11-14 03:36:41,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531654056] [2024-11-14 03:36:41,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:36:41,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-14 03:36:41,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:36:41,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-14 03:36:41,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1508, Unknown=17, NotChecked=240, Total=1892 [2024-11-14 03:36:41,328 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 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 03:36:43,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:36:43,801 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2024-11-14 03:36:43,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 03:36:43,802 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 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) Word has length 25 [2024-11-14 03:36:43,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:36:43,803 INFO L225 Difference]: With dead ends: 45 [2024-11-14 03:36:43,803 INFO L226 Difference]: Without dead ends: 28 [2024-11-14 03:36:43,805 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=270, Invalid=2271, Unknown=21, NotChecked=300, Total=2862 [2024-11-14 03:36:43,805 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 64 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:36:43,806 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 77 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:36:43,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-14 03:36:43,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-14 03:36:43,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 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 03:36:43,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2024-11-14 03:36:43,816 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 25 [2024-11-14 03:36:43,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:36:43,816 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2024-11-14 03:36:43,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 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 03:36:43,817 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2024-11-14 03:36:43,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-14 03:36:43,817 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:36:43,818 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-14 03:36:43,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 03:36:44,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:44,018 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:36:44,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:36:44,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1379771386, now seen corresponding path program 5 times [2024-11-14 03:36:44,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:36:44,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095467934] [2024-11-14 03:36:44,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:36:44,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:36:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:36:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:36:45,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:36:45,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095467934] [2024-11-14 03:36:45,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095467934] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:36:45,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699331260] [2024-11-14 03:36:45,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:36:45,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:45,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:36:45,796 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:36:45,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 03:36:46,154 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 03:36:46,155 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:36:46,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-14 03:36:46,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:36:46,271 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 6 treesize of output 5 [2024-11-14 03:36:46,392 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 03:36:46,409 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 03:36:46,545 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 03:36:46,545 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 03:36:46,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 9 treesize of output 12 [2024-11-14 03:36:46,698 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 21 treesize of output 23 [2024-11-14 03:36:46,708 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 7 [2024-11-14 03:36:46,734 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 20 treesize of output 15 [2024-11-14 03:36:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:36:47,714 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:36:48,527 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:36:48,528 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 110 treesize of output 98 [2024-11-14 03:36:48,542 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:36:48,543 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 95 treesize of output 78 [2024-11-14 03:36:48,606 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:36:48,607 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 110 treesize of output 93 [2024-11-14 03:36:48,621 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:36:48,622 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 90 treesize of output 78 [2024-11-14 03:37:25,398 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:37:25,398 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 112 treesize of output 72 [2024-11-14 03:37:25,421 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:37:25,422 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 72 treesize of output 62 [2024-11-14 03:37:26,498 INFO L349 Elim1Store]: treesize reduction 161, result has 64.3 percent of original size [2024-11-14 03:37:26,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 336 treesize of output 502 [2024-11-14 03:37:26,876 INFO L349 Elim1Store]: treesize reduction 11, result has 84.7 percent of original size [2024-11-14 03:37:26,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 804 treesize of output 754 [2024-11-14 03:37:27,166 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:37:27,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 663 treesize of output 645 [2024-11-14 03:37:27,283 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:37:27,284 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 442 treesize of output 410 [2024-11-14 03:43:29,775 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-14 03:43:29,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2024-11-14 03:43:29,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1216638325] [2024-11-14 03:43:29,778 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-14 03:43:29,778 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:43:29,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:43:29,778 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:43:29,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:43:29,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2024-11-14 03:43:29,782 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:326) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:220) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:447) at java.base/java.io.OutputStream.write(OutputStream.java:167) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:125) at java.base/java.io.BufferedOutputStream.implFlush(BufferedOutputStream.java:252) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:246) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:412) at java.base/sun.nio.cs.StreamEncoder.lockedFlush(StreamEncoder.java:214) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:201) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:262) at java.base/java.io.BufferedWriter.implFlush(BufferedWriter.java:372) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:359) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 44 more [2024-11-14 03:43:29,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:43:29,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-11-14 03:43:29,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261082154] [2024-11-14 03:43:29,786 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 03:43:29,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 03:43:29,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:43:29,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 03:43:29,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=754, Unknown=26, NotChecked=0, Total=870 [2024-11-14 03:43:29,787 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:43:29,788 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 38.9s TimeCoverageRelationStatistics Valid=90, Invalid=754, Unknown=26, NotChecked=0, Total=870 [2024-11-14 03:43:29,789 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:43:29,790 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:43:29,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 03:43:29,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:43:29,991 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertCodeBlock(IncrementalHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:278) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1708) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:385) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:447) at java.base/java.io.OutputStream.write(OutputStream.java:167) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:125) at java.base/java.io.BufferedOutputStream.implFlush(BufferedOutputStream.java:252) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:246) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:412) at java.base/sun.nio.cs.StreamEncoder.lockedFlush(StreamEncoder.java:214) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:201) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:262) at java.base/java.io.BufferedWriter.implFlush(BufferedWriter.java:372) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:359) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 36 more [2024-11-14 03:43:29,994 INFO L158 Benchmark]: Toolchain (without parser) took 470877.80ms. Allocated memory was 117.4MB in the beginning and 721.4MB in the end (delta: 604.0MB). Free memory was 92.6MB in the beginning and 579.9MB in the end (delta: -487.3MB). Peak memory consumption was 116.4MB. Max. memory is 16.1GB. [2024-11-14 03:43:29,994 INFO L158 Benchmark]: CDTParser took 1.12ms. Allocated memory is still 167.8MB. Free memory is still 104.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 03:43:29,999 INFO L158 Benchmark]: CACSL2BoogieTranslator took 666.93ms. Allocated memory is still 117.4MB. Free memory was 92.3MB in the beginning and 74.8MB in the end (delta: 17.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-14 03:43:29,999 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.08ms. Allocated memory is still 117.4MB. Free memory was 74.8MB in the beginning and 73.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 03:43:29,999 INFO L158 Benchmark]: Boogie Preprocessor took 37.42ms. Allocated memory is still 117.4MB. Free memory was 73.0MB in the beginning and 72.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 03:43:29,999 INFO L158 Benchmark]: RCFGBuilder took 528.75ms. Allocated memory is still 117.4MB. Free memory was 71.6MB in the beginning and 55.7MB in the end (delta: 15.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-14 03:43:29,999 INFO L158 Benchmark]: TraceAbstraction took 469580.11ms. Allocated memory was 117.4MB in the beginning and 721.4MB in the end (delta: 604.0MB). Free memory was 55.0MB in the beginning and 579.9MB in the end (delta: -524.9MB). Peak memory consumption was 82.9MB. Max. memory is 16.1GB. [2024-11-14 03:43:30,001 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.12ms. Allocated memory is still 167.8MB. Free memory is still 104.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 666.93ms. Allocated memory is still 117.4MB. Free memory was 92.3MB in the beginning and 74.8MB in the end (delta: 17.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.08ms. Allocated memory is still 117.4MB. Free memory was 74.8MB in the beginning and 73.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 37.42ms. Allocated memory is still 117.4MB. Free memory was 73.0MB in the beginning and 72.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 528.75ms. Allocated memory is still 117.4MB. Free memory was 71.6MB in the beginning and 55.7MB in the end (delta: 15.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 469580.11ms. Allocated memory was 117.4MB in the beginning and 721.4MB in the end (delta: 604.0MB). Free memory was 55.0MB in the beginning and 579.9MB in the end (delta: -524.9MB). Peak memory consumption was 82.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/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_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b3d7899c651fa61cfb9cf623e0f4ceb470fe32eb0d0272d2277c965ed07c2f88 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:43:32,857 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:43:32,994 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2024-11-14 03:43:33,004 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:43:33,004 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:43:33,048 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:43:33,049 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:43:33,049 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:43:33,050 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:43:33,050 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:43:33,050 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:43:33,050 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:43:33,050 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:43:33,050 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:43:33,051 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:43:33,051 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:43:33,051 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:43:33,052 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:43:33,052 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:43:33,052 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:43:33,052 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:43:33,052 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:43:33,052 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:43:33,053 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:43:33,053 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 03:43:33,053 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-14 03:43:33,053 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:43:33,053 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-14 03:43:33,053 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:43:33,054 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:43:33,054 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:43:33,054 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:43:33,054 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-14 03:43:33,054 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:43:33,054 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:43:33,054 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:43:33,055 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:43:33,055 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:43:33,055 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:43:33,055 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2024-11-14 03:43:33,055 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-14 03:43:33,056 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:43:33,056 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:43:33,056 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_d80876ae-8040-48eb-9f46-bd32853da1ee/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 ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3d7899c651fa61cfb9cf623e0f4ceb470fe32eb0d0272d2277c965ed07c2f88 [2024-11-14 03:43:33,483 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:43:33,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:43:33,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:43:33,500 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:43:33,500 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:43:33,501 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i Unable to find full path for "g++" [2024-11-14 03:43:35,675 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:43:36,043 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:43:36,044 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2024-11-14 03:43:36,057 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/data/390f11326/c31708d0fc0640cc82f6435f083ae4a5/FLAG07c0e4094 [2024-11-14 03:43:36,081 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/data/390f11326/c31708d0fc0640cc82f6435f083ae4a5 [2024-11-14 03:43:36,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:43:36,086 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:43:36,089 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:43:36,090 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:43:36,096 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:43:36,097 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:43:36" (1/1) ... [2024-11-14 03:43:36,100 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39983071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:43:36, skipping insertion in model container [2024-11-14 03:43:36,101 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:43:36" (1/1) ... [2024-11-14 03:43:36,151 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:43:36,562 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i[24038,24051] [2024-11-14 03:43:36,566 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:43:36,580 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:43:36,638 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i[24038,24051] [2024-11-14 03:43:36,640 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:43:36,690 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:43:36,690 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:43:36 WrapperNode [2024-11-14 03:43:36,691 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:43:36,693 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:43:36,693 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:43:36,693 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:43:36,701 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:43:36" (1/1) ... [2024-11-14 03:43:36,733 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:43:36" (1/1) ... [2024-11-14 03:43:36,760 INFO L138 Inliner]: procedures = 129, calls = 30, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 101 [2024-11-14 03:43:36,761 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:43:36,762 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:43:36,762 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:43:36,762 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:43:36,771 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:43:36" (1/1) ... [2024-11-14 03:43:36,771 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:43:36" (1/1) ... [2024-11-14 03:43:36,779 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:43:36" (1/1) ... [2024-11-14 03:43:36,779 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:43:36" (1/1) ... [2024-11-14 03:43:36,800 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:43:36" (1/1) ... [2024-11-14 03:43:36,808 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:43:36" (1/1) ... [2024-11-14 03:43:36,813 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:43:36" (1/1) ... [2024-11-14 03:43:36,818 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:43:36" (1/1) ... [2024-11-14 03:43:36,821 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:43:36,823 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:43:36,823 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:43:36,823 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:43:36,824 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:43:36" (1/1) ... [2024-11-14 03:43:36,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:43:36,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:43:36,862 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:43:36,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:43:36,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-14 03:43:36,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:43:36,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 03:43:36,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-14 03:43:36,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-14 03:43:36,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 03:43:36,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2024-11-14 03:43:36,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-14 03:43:36,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2024-11-14 03:43:36,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:43:36,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:43:37,061 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:43:37,064 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:43:37,440 INFO L? ?]: Removed 31 outVars from TransFormulas that were not future-live. [2024-11-14 03:43:37,440 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:43:37,452 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:43:37,452 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-14 03:43:37,453 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:43:37 BoogieIcfgContainer [2024-11-14 03:43:37,453 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:43:37,481 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:43:37,481 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:43:37,488 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:43:37,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:43:36" (1/3) ... [2024-11-14 03:43:37,489 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a6d4210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:43:37, skipping insertion in model container [2024-11-14 03:43:37,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:43:36" (2/3) ... [2024-11-14 03:43:37,490 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a6d4210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:43:37, skipping insertion in model container [2024-11-14 03:43:37,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:43:37" (3/3) ... [2024-11-14 03:43:37,492 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all_reverse.i [2024-11-14 03:43:37,512 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:43:37,514 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG sll2n_remove_all_reverse.i that has 1 procedures, 22 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-14 03:43:37,581 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:43:37,595 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@632918db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:43:37,595 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 03:43:37,600 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:43:37,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 03:43:37,607 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:43:37,607 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:43:37,608 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:43:37,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:43:37,614 INFO L85 PathProgramCache]: Analyzing trace with hash 2051473843, now seen corresponding path program 1 times [2024-11-14 03:43:37,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:43:37,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995447402] [2024-11-14 03:43:37,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:43:37,632 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:43:37,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:43:37,638 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 03:43:37,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-14 03:43:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:43:37,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-14 03:43:37,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:43:37,833 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 03:43:37,834 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:43:37,835 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:43:37,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995447402] [2024-11-14 03:43:37,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995447402] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:43:37,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:43:37,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:43:37,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104673295] [2024-11-14 03:43:37,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:43:37,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-14 03:43:37,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:43:37,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-14 03:43:37,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 03:43:37,873 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 03:43:37,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:43:37,892 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2024-11-14 03:43:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-14 03:43:37,894 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2024-11-14 03:43:37,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:43:37,902 INFO L225 Difference]: With dead ends: 37 [2024-11-14 03:43:37,903 INFO L226 Difference]: Without dead ends: 18 [2024-11-14 03:43:37,906 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 03:43:37,912 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:43:37,913 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:43:37,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-14 03:43:37,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-14 03:43:37,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:43:37,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-11-14 03:43:37,955 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 9 [2024-11-14 03:43:37,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:43:37,957 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-11-14 03:43:37,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 03:43:37,957 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-11-14 03:43:37,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 03:43:37,958 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:43:37,958 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:43:37,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-11-14 03:43:38,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:43:38,159 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:43:38,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:43:38,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1783643099, now seen corresponding path program 1 times [2024-11-14 03:43:38,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:43:38,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735688758] [2024-11-14 03:43:38,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:43:38,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:43:38,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:43:38,163 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 03:43:38,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-14 03:43:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:43:38,258 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 03:43:38,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:43:38,316 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 03:43:38,316 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:43:38,316 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:43:38,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735688758] [2024-11-14 03:43:38,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735688758] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:43:38,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:43:38,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:43:38,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767075536] [2024-11-14 03:43:38,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:43:38,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:43:38,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:43:38,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:43:38,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:43:38,319 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 03:43:38,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:43:38,369 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2024-11-14 03:43:38,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:43:38,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2024-11-14 03:43:38,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:43:38,372 INFO L225 Difference]: With dead ends: 34 [2024-11-14 03:43:38,373 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 03:43:38,374 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 03:43:38,375 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:43:38,375 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:43:38,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 03:43:38,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2024-11-14 03:43:38,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:43:38,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-11-14 03:43:38,385 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 9 [2024-11-14 03:43:38,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:43:38,386 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-11-14 03:43:38,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 03:43:38,386 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-11-14 03:43:38,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-14 03:43:38,387 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:43:38,387 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:43:38,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-11-14 03:43:38,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:43:38,588 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:43:38,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:43:38,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1657957021, now seen corresponding path program 1 times [2024-11-14 03:43:38,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:43:38,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519425954] [2024-11-14 03:43:38,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:43:38,590 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:43:38,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:43:38,592 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 03:43:38,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-11-14 03:43:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:43:38,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 03:43:38,741 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:43:38,794 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 03:43:38,794 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:43:38,866 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 03:43:38,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:43:38,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519425954] [2024-11-14 03:43:38,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519425954] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:43:38,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2097643658] [2024-11-14 03:43:38,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:43:38,870 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 03:43:38,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 03:43:38,882 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 03:43:38,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-11-14 03:43:39,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:43:39,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 03:43:39,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:43:39,148 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 03:43:39,148 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:43:39,180 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 03:43:39,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2097643658] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:43:39,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534714812] [2024-11-14 03:43:39,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:43:39,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:43:39,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:43:39,191 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:43:39,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:43:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:43:39,319 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:43:39,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:43:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:43:39,387 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:43:39,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534714812] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:43:39,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2024-11-14 03:43:39,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4, 4, 4] total 8 [2024-11-14 03:43:39,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497314903] [2024-11-14 03:43:39,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:43:39,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:43:39,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:43:39,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:43:39,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:43:39,392 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:43:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:43:39,433 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2024-11-14 03:43:39,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:43:39,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-14 03:43:39,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:43:39,435 INFO L225 Difference]: With dead ends: 29 [2024-11-14 03:43:39,435 INFO L226 Difference]: Without dead ends: 25 [2024-11-14 03:43:39,436 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:43:39,437 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:43:39,439 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 45 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:43:39,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-14 03:43:39,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2024-11-14 03:43:39,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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 03:43:39,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2024-11-14 03:43:39,448 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2024-11-14 03:43:39,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:43:39,448 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2024-11-14 03:43:39,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:43:39,450 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2024-11-14 03:43:39,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 03:43:39,450 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:43:39,450 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:43:39,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2024-11-14 03:43:39,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-11-14 03:43:39,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:43:40,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:43:40,052 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:43:40,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:43:40,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1240113746, now seen corresponding path program 1 times [2024-11-14 03:43:40,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:43:40,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1481887811] [2024-11-14 03:43:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:43:40,053 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:43:40,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:43:40,056 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 03:43:40,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-11-14 03:43:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:43:40,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 03:43:40,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:43:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:43:40,219 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:43:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:43:40,273 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:43:40,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1481887811] [2024-11-14 03:43:40,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1481887811] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:43:40,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1254145073] [2024-11-14 03:43:40,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:43:40,274 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 03:43:40,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 03:43:40,277 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 03:43:40,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2024-11-14 03:43:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:43:40,506 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 03:43:40,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:43:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:43:40,539 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:43:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:43:40,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1254145073] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:43:40,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944684281] [2024-11-14 03:43:40,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:43:40,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:43:40,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:43:40,579 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:43:40,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:43:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:43:40,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 03:43:40,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:43:40,790 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 03:43:40,802 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 03:43:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:43:40,928 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:43:40,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944684281] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:43:40,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2024-11-14 03:43:40,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4, 4, 4] total 9 [2024-11-14 03:43:40,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184395217] [2024-11-14 03:43:40,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:43:40,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:43:40,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:43:40,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:43:40,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:43:40,933 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 03:43:41,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:43:41,188 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2024-11-14 03:43:41,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:43:41,189 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 16 [2024-11-14 03:43:41,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:43:41,190 INFO L225 Difference]: With dead ends: 30 [2024-11-14 03:43:41,190 INFO L226 Difference]: Without dead ends: 20 [2024-11-14 03:43:41,190 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-14 03:43:41,191 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:43:41,191 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 61 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:43:41,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-14 03:43:41,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-14 03:43:41,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:43:41,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-11-14 03:43:41,196 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2024-11-14 03:43:41,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:43:41,196 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-11-14 03:43:41,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 03:43:41,196 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-11-14 03:43:41,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 03:43:41,200 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:43:41,200 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:43:41,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 03:43:41,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2024-11-14 03:43:41,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-11-14 03:43:41,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:43:41,805 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:43:41,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:43:41,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1264892743, now seen corresponding path program 1 times [2024-11-14 03:43:41,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:43:41,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171312689] [2024-11-14 03:43:41,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:43:41,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:43:41,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:43:41,811 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 03:43:41,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-11-14 03:43:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:43:41,953 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 03:43:41,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:43:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:43:41,990 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:43:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:43:42,034 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:43:42,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171312689] [2024-11-14 03:43:42,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171312689] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:43:42,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [241245328] [2024-11-14 03:43:42,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:43:42,035 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 03:43:42,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 03:43:42,037 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 03:43:42,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2024-11-14 03:43:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:43:42,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 03:43:42,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:43:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:43:42,284 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:43:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:43:42,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [241245328] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:43:42,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258763083] [2024-11-14 03:43:42,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:43:42,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:43:42,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:43:42,311 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:43:42,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 03:43:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:43:42,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 03:43:42,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:43:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:43:42,528 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:43:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:43:42,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258763083] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:43:42,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 03:43:42,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 6] total 13 [2024-11-14 03:43:42,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173005567] [2024-11-14 03:43:42,743 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 03:43:42,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 03:43:42,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:43:42,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 03:43:42,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-14 03:43:42,744 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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 03:43:43,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:43:43,068 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2024-11-14 03:43:43,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 03:43:43,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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) Word has length 19 [2024-11-14 03:43:43,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:43:43,070 INFO L225 Difference]: With dead ends: 58 [2024-11-14 03:43:43,070 INFO L226 Difference]: Without dead ends: 45 [2024-11-14 03:43:43,070 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-11-14 03:43:43,071 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:43:43,072 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 160 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:43:43,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-14 03:43:43,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2024-11-14 03:43:43,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 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 03:43:43,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2024-11-14 03:43:43,079 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 19 [2024-11-14 03:43:43,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:43:43,079 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2024-11-14 03:43:43,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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 03:43:43,079 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2024-11-14 03:43:43,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-14 03:43:43,080 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:43:43,080 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:43:43,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2024-11-14 03:43:43,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 03:43:43,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2024-11-14 03:43:43,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 03:43:43,681 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:43:43,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:43:43,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1351949033, now seen corresponding path program 2 times [2024-11-14 03:43:43,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:43:43,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209345029] [2024-11-14 03:43:43,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 03:43:43,682 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:43:43,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:43:43,685 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 03:43:43,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-11-14 03:43:43,879 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 03:43:43,879 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:43:43,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 03:43:43,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:43:44,001 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 03:43:44,196 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 7 treesize of output 3 [2024-11-14 03:43:44,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:43:44,308 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2024-11-14 03:43:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 03:43:44,345 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:43:44,537 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 27 treesize of output 19 [2024-11-14 03:43:44,995 INFO L349 Elim1Store]: treesize reduction 13, result has 62.9 percent of original size [2024-11-14 03:43:44,995 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 153 treesize of output 150 [2024-11-14 03:43:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 03:43:45,106 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:43:45,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209345029] [2024-11-14 03:43:45,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209345029] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:43:45,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2098521230] [2024-11-14 03:43:45,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 03:43:45,109 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 03:43:45,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 03:43:45,111 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 03:43:45,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2024-11-14 03:43:45,433 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 03:43:45,434 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:43:45,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-14 03:43:45,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:43:45,514 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 03:43:45,521 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 03:43:46,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:43:46,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 136 [2024-11-14 03:43:46,343 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:43:46,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 146 [2024-11-14 03:43:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:43:48,624 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:43:48,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2098521230] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:43:48,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:43:48,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13, 11] total 22 [2024-11-14 03:43:48,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935251601] [2024-11-14 03:43:48,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:43:48,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:43:48,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:43:48,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:43:48,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2024-11-14 03:43:48,627 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 03:43:49,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:43:49,146 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2024-11-14 03:43:49,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:43:49,147 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 29 [2024-11-14 03:43:49,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:43:49,148 INFO L225 Difference]: With dead ends: 75 [2024-11-14 03:43:49,149 INFO L226 Difference]: Without dead ends: 50 [2024-11-14 03:43:49,150 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2024-11-14 03:43:49,152 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:43:49,153 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:43:49,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-14 03:43:49,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-14 03:43:49,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 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 03:43:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2024-11-14 03:43:49,164 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 29 [2024-11-14 03:43:49,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:43:49,164 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2024-11-14 03:43:49,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 03:43:49,165 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2024-11-14 03:43:49,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 03:43:49,165 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:43:49,166 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:43:49,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2024-11-14 03:43:49,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2024-11-14 03:43:49,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:43:49,567 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:43:49,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:43:49,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1120643533, now seen corresponding path program 1 times [2024-11-14 03:43:49,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:43:49,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971019845] [2024-11-14 03:43:49,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:43:49,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:43:49,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:43:49,570 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 03:43:49,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-11-14 03:43:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:43:49,849 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-14 03:43:49,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:43:50,006 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 8 treesize of output 1 [2024-11-14 03:43:50,669 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-14 03:43:50,669 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 46 treesize of output 32 [2024-11-14 03:43:50,700 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2024-11-14 03:43:50,700 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2024-11-14 03:43:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 03:43:50,912 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:43:58,687 INFO L349 Elim1Store]: treesize reduction 14, result has 54.8 percent of original size [2024-11-14 03:43:58,688 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 429 treesize of output 347 [2024-11-14 03:44:04,722 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 57 treesize of output 45 [2024-11-14 03:44:04,730 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 45 treesize of output 37 [2024-11-14 03:44:04,869 INFO L349 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2024-11-14 03:44:04,869 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 758 treesize of output 678 [2024-11-14 03:44:04,901 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 216 treesize of output 198 [2024-11-14 03:44:04,956 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 56 treesize of output 48 [2024-11-14 03:44:05,045 INFO L349 Elim1Store]: treesize reduction 165, result has 0.6 percent of original size [2024-11-14 03:44:05,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 5455 treesize of output 1 [2024-11-14 03:44:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 03:44:05,642 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:44:05,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971019845] [2024-11-14 03:44:05,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971019845] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:44:05,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1443053516] [2024-11-14 03:44:05,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:05,642 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 03:44:05,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 03:44:05,644 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 03:44:05,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2024-11-14 03:44:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:06,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-14 03:44:06,069 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:44:08,360 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 32 [2024-11-14 03:44:08,374 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 27 treesize of output 22 [2024-11-14 03:44:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 03:44:09,069 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:44:09,563 INFO L349 Elim1Store]: treesize reduction 14, result has 54.8 percent of original size [2024-11-14 03:44:09,563 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 429 treesize of output 347 [2024-11-14 03:44:09,671 INFO L349 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2024-11-14 03:44:09,672 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 325 treesize of output 289 [2024-11-14 03:44:10,056 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:44:10,057 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 42 [2024-11-14 03:44:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 03:44:11,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1443053516] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:44:11,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761534636] [2024-11-14 03:44:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:11,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:44:11,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:44:11,511 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:44:11,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 03:44:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:11,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-14 03:44:11,687 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:44:14,700 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 03:44:14,717 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 8 treesize of output 1 [2024-11-14 03:44:16,221 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2024-11-14 03:44:16,236 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:44:16,237 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 38 treesize of output 25 [2024-11-14 03:44:17,044 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-14 03:44:17,044 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 3 case distinctions, treesize of input 37 treesize of output 23 [2024-11-14 03:44:17,057 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:44:17,057 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 15 treesize of output 7 [2024-11-14 03:44:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:17,253 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:45:01,512 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32))) (let ((.cse0 (select (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| .cse0)) (= (_ bv0 32) (let ((.cse3 (bvadd (_ bv4 32) .cse0))) (select (let ((.cse1 (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) .cse3 (_ bv0 32))))) (select .cse1 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| .cse2 (store (select |c_#memory_$Pointer$.offset| .cse2) .cse3 (_ bv0 32))) |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse2))))) (forall ((|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32))) (let ((.cse4 (select (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse6 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| .cse4)) (= (let ((.cse7 (bvadd (_ bv4 32) .cse4))) (let ((.cse5 (store |c_#memory_$Pointer$.offset| .cse6 (store (select |c_#memory_$Pointer$.offset| .cse6) .cse7 (_ bv0 32))))) (select (select .cse5 (select (select (store |c_#memory_$Pointer$.base| .cse6 (store (select |c_#memory_$Pointer$.base| .cse6) .cse7 (_ bv0 32))) |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (_ bv4 32) (select (select .cse5 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (_ bv0 32)) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse6)))))) is different from false [2024-11-14 03:45:01,835 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 958 treesize of output 898 [2024-11-14 03:45:05,918 INFO L349 Elim1Store]: treesize reduction 313, result has 24.9 percent of original size [2024-11-14 03:45:05,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 14 new quantified variables, introduced 36 case distinctions, treesize of input 34235 treesize of output 28898 [2024-11-14 03:45:07,580 INFO L349 Elim1Store]: treesize reduction 24, result has 54.7 percent of original size [2024-11-14 03:45:07,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3018 treesize of output 2706 [2024-11-14 03:46:52,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:46:52,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:46:52,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:46:53,230 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 03:46:53,698 INFO L349 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2024-11-14 03:46:53,698 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 2711 treesize of output 1 [2024-11-14 03:46:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-14 03:46:59,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761534636] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:46:59,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 03:46:59,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 18, 18] total 65 [2024-11-14 03:46:59,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108403927] [2024-11-14 03:46:59,161 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 03:46:59,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-14 03:46:59,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:46:59,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-14 03:46:59,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=3629, Unknown=23, NotChecked=124, Total=4160 [2024-11-14 03:46:59,166 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 65 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 65 states have internal predecessors, (126), 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 03:47:01,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:47:07,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-14 03:47:08,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-14 03:47:12,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-14 03:47:14,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-14 03:47:17,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-14 03:47:19,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-14 03:47:27,967 WARN L851 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~#s~0#1.offset| (_ bv0 32)) (forall ((|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32))) (let ((.cse0 (select (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| .cse0)) (= (_ bv0 32) (let ((.cse3 (bvadd (_ bv4 32) .cse0))) (select (let ((.cse1 (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) .cse3 (_ bv0 32))))) (select .cse1 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| .cse2 (store (select |c_#memory_$Pointer$.offset| .cse2) .cse3 (_ bv0 32))) |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse2))))) (= (_ bv0 32) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (forall ((|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32))) (let ((.cse4 (select (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse6 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| .cse4)) (= (let ((.cse7 (bvadd (_ bv4 32) .cse4))) (let ((.cse5 (store |c_#memory_$Pointer$.offset| .cse6 (store (select |c_#memory_$Pointer$.offset| .cse6) .cse7 (_ bv0 32))))) (select (select .cse5 (select (select (store |c_#memory_$Pointer$.base| .cse6 (store (select |c_#memory_$Pointer$.base| .cse6) .cse7 (_ bv0 32))) |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (_ bv4 32) (select (select .cse5 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (_ bv0 32)) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse6))))) (bvult |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#s~0#1.base|) (= (_ bv0 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) (_ bv4 32))) (exists ((|#StackHeapBarrier| (_ BitVec 32))) (and (bvult |#StackHeapBarrier| |c_ULTIMATE.start_main_~#s~0#1.base|) (bvult |c_ULTIMATE.start_sll_create_~head~0#1.base| |#StackHeapBarrier|)))) is different from false [2024-11-14 03:47:32,060 WARN L851 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~#s~0#1.offset| (_ bv0 32)) (forall ((|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32))) (let ((.cse0 (select (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| .cse0)) (= (_ bv0 32) (let ((.cse3 (bvadd (_ bv4 32) .cse0))) (select (let ((.cse1 (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) .cse3 (_ bv0 32))))) (select .cse1 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| .cse2 (store (select |c_#memory_$Pointer$.offset| .cse2) .cse3 (_ bv0 32))) |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse2))))) (= (_ bv0 32) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (forall ((|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32))) (let ((.cse4 (select (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse6 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| .cse4)) (= (let ((.cse7 (bvadd (_ bv4 32) .cse4))) (let ((.cse5 (store |c_#memory_$Pointer$.offset| .cse6 (store (select |c_#memory_$Pointer$.offset| .cse6) .cse7 (_ bv0 32))))) (select (select .cse5 (select (select (store |c_#memory_$Pointer$.base| .cse6 (store (select |c_#memory_$Pointer$.base| .cse6) .cse7 (_ bv0 32))) |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (_ bv4 32) (select (select .cse5 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (_ bv0 32)) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse6))))) (= (_ bv0 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) (_ bv4 32))) (exists ((|#StackHeapBarrier| (_ BitVec 32))) (and (bvult |#StackHeapBarrier| |c_ULTIMATE.start_main_~#s~0#1.base|) (bvult |c_ULTIMATE.start_sll_create_~head~0#1.base| |#StackHeapBarrier|)))) is different from false [2024-11-14 03:47:40,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:47:43,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:47:45,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:47:47,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:47:47,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:47:47,217 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2024-11-14 03:47:47,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 03:47:47,220 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 65 states have internal predecessors, (126), 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 03:47:47,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:47:47,221 INFO L225 Difference]: With dead ends: 101 [2024-11-14 03:47:47,221 INFO L226 Difference]: Without dead ends: 65 [2024-11-14 03:47:47,224 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 89.6s TimeCoverageRelationStatistics Valid=598, Invalid=4937, Unknown=27, NotChecked=444, Total=6006 [2024-11-14 03:47:47,225 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 72 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 5 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 29.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:47:47,226 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 178 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 431 Invalid, 8 Unknown, 206 Unchecked, 29.5s Time] [2024-11-14 03:47:47,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-14 03:47:47,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2024-11-14 03:47:47,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.15) internal successors, (69), 60 states have internal predecessors, (69), 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 03:47:47,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2024-11-14 03:47:47,245 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 33 [2024-11-14 03:47:47,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:47:47,245 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2024-11-14 03:47:47,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 65 states have internal predecessors, (126), 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 03:47:47,245 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2024-11-14 03:47:47,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 03:47:47,246 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:47:47,246 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:47:47,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2024-11-14 03:47:47,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2024-11-14 03:47:47,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 03:47:47,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:47:47,847 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:47:47,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:47:47,847 INFO L85 PathProgramCache]: Analyzing trace with hash 2081645912, now seen corresponding path program 2 times [2024-11-14 03:47:47,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:47:47,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791012364] [2024-11-14 03:47:47,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 03:47:47,848 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:47:47,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:47:47,850 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 03:47:47,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80876ae-8040-48eb-9f46-bd32853da1ee/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2024-11-14 03:47:48,053 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 03:47:48,053 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:47:48,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-14 03:47:48,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:47:48,174 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 6 treesize of output 7 [2024-11-14 03:47:48,518 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 03:47:48,565 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 03:47:48,806 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 03:47:48,806 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 13 [2024-11-14 03:47:49,104 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 03:47:49,186 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 03:47:49,401 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 22 [2024-11-14 03:47:49,495 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 27 treesize of output 15 [2024-11-14 03:47:52,321 INFO L349 Elim1Store]: treesize reduction 36, result has 41.0 percent of original size [2024-11-14 03:47:52,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 58 [2024-11-14 03:47:52,458 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-14 03:47:52,458 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 10 [2024-11-14 03:47:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:47:52,708 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:48:06,326 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:48:06,327 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 110 treesize of output 93 [2024-11-14 03:48:06,367 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:48:06,368 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 90 treesize of output 78 [2024-11-14 03:48:06,525 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:48:06,525 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 110 treesize of output 98 [2024-11-14 03:48:06,569 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:48:06,570 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 95 treesize of output 78 [2024-11-14 03:48:16,820 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:48:16,820 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 112 treesize of output 72 [2024-11-14 03:48:16,881 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:48:16,882 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 72 treesize of output 62 [2024-11-14 03:48:17,069 INFO L224 Elim1Store]: Index analysis took 103 ms [2024-11-14 03:48:21,150 INFO L349 Elim1Store]: treesize reduction 161, result has 64.3 percent of original size [2024-11-14 03:48:21,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 336 treesize of output 502 [2024-11-14 03:48:21,404 INFO L224 Elim1Store]: Index analysis took 120 ms [2024-11-14 03:48:22,604 INFO L349 Elim1Store]: treesize reduction 11, result has 84.7 percent of original size [2024-11-14 03:48:22,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 804 treesize of output 754 [2024-11-14 03:48:22,803 INFO L224 Elim1Store]: Index analysis took 117 ms [2024-11-14 03:48:23,539 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:48:23,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 663 treesize of output 645 [2024-11-14 03:48:23,744 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:48:23,744 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 442 treesize of output 410 [2024-11-14 03:49:08,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:49:08,473 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 112 treesize of output 82 [2024-11-14 03:49:08,527 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:49:08,527 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 82 treesize of output 62 [2024-11-14 03:49:13,244 INFO L349 Elim1Store]: treesize reduction 24, result has 66.7 percent of original size [2024-11-14 03:49:13,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 182 treesize of output 193 [2024-11-14 03:49:13,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:49:13,677 INFO L224 Elim1Store]: Index analysis took 288 ms [2024-11-14 03:49:21,094 WARN L286 SmtUtils]: Spent 7.36s on a formula simplification. DAG size of input: 198 DAG size of output: 162 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-14 03:49:21,094 INFO L349 Elim1Store]: treesize reduction 165, result has 70.9 percent of original size [2024-11-14 03:49:21,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 12 new quantified variables, introduced 54 case distinctions, treesize of input 400 treesize of output 699 [2024-11-14 03:49:21,334 INFO L224 Elim1Store]: Index analysis took 118 ms [2024-11-14 03:49:22,008 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:49:22,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 266 treesize of output 316 [2024-11-14 03:49:22,210 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:49:22,211 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 372 treesize of output 324