./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.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_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/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_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/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_9c35aa5d-07bf-4288-bf5e-e3509680b90f/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 68e1c5cf050539b3ee8f058d38ff7af5aea2a400d05e41e0185e4509f45301e0 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 23:27:25,948 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 23:27:26,045 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-13 23:27:26,055 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 23:27:26,056 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 23:27:26,102 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 23:27:26,103 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 23:27:26,103 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 23:27:26,105 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 23:27:26,105 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 23:27:26,106 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-13 23:27:26,106 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-13 23:27:26,106 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-13 23:27:26,106 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-13 23:27:26,106 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-13 23:27:26,108 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-13 23:27:26,108 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-13 23:27:26,108 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-13 23:27:26,108 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-13 23:27:26,109 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-13 23:27:26,109 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-13 23:27:26,109 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-13 23:27:26,109 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 23:27:26,109 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 23:27:26,110 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 23:27:26,110 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 23:27:26,110 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 23:27:26,110 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 23:27:26,110 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 23:27:26,110 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 23:27:26,110 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 23:27:26,110 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 23:27:26,110 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 23:27:26,111 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 23:27:26,111 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 23:27:26,111 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 23:27:26,112 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 23:27:26,112 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 23:27:26,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:27:26,112 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 23:27:26,113 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 23:27:26,113 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 23:27:26,113 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-13 23:27:26,113 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 23:27:26,113 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 23:27:26,113 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-13 23:27:26,113 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 23:27:26,113 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_9c35aa5d-07bf-4288-bf5e-e3509680b90f/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 -> 68e1c5cf050539b3ee8f058d38ff7af5aea2a400d05e41e0185e4509f45301e0 [2024-11-13 23:27:26,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 23:27:26,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 23:27:26,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 23:27:26,485 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 23:27:26,485 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 23:27:26,486 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i Unable to find full path for "g++" [2024-11-13 23:27:28,551 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 23:27:29,065 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 23:27:29,067 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2024-11-13 23:27:29,085 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/data/f15c2228a/78e823cd0a7a4f40b25c80261e28fb64/FLAG04f69f739 [2024-11-13 23:27:29,103 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/data/f15c2228a/78e823cd0a7a4f40b25c80261e28fb64 [2024-11-13 23:27:29,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 23:27:29,108 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 23:27:29,110 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 23:27:29,110 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 23:27:29,116 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 23:27:29,117 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:27:29" (1/1) ... [2024-11-13 23:27:29,119 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46bff79c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:27:29, skipping insertion in model container [2024-11-13 23:27:29,119 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:27:29" (1/1) ... [2024-11-13 23:27:29,154 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 23:27:29,520 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_9c35aa5d-07bf-4288-bf5e-e3509680b90f/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i[25013,25026] [2024-11-13 23:27:29,529 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:27:29,541 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 23:27:29,622 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_9c35aa5d-07bf-4288-bf5e-e3509680b90f/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i[25013,25026] [2024-11-13 23:27:29,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:27:29,668 INFO L204 MainTranslator]: Completed translation [2024-11-13 23:27:29,669 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:27:29 WrapperNode [2024-11-13 23:27:29,669 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 23:27:29,670 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 23:27:29,670 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 23:27:29,670 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 23:27:29,679 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:27:29" (1/1) ... [2024-11-13 23:27:29,692 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:27:29" (1/1) ... [2024-11-13 23:27:29,720 INFO L138 Inliner]: procedures = 129, calls = 40, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 175 [2024-11-13 23:27:29,720 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 23:27:29,721 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 23:27:29,721 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 23:27:29,721 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 23:27:29,730 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:27:29" (1/1) ... [2024-11-13 23:27:29,730 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:27:29" (1/1) ... [2024-11-13 23:27:29,734 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:27:29" (1/1) ... [2024-11-13 23:27:29,735 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:27:29" (1/1) ... [2024-11-13 23:27:29,744 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:27:29" (1/1) ... [2024-11-13 23:27:29,752 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:27:29" (1/1) ... [2024-11-13 23:27:29,757 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:27:29" (1/1) ... [2024-11-13 23:27:29,761 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:27:29" (1/1) ... [2024-11-13 23:27:29,765 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 23:27:29,766 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 23:27:29,766 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 23:27:29,766 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 23:27:29,767 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:27:29" (1/1) ... [2024-11-13 23:27:29,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:27:29,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:27:29,808 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-13 23:27:29,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-13 23:27:29,847 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2024-11-13 23:27:29,848 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2024-11-13 23:27:29,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 23:27:29,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 23:27:29,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 23:27:29,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-13 23:27:29,848 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2024-11-13 23:27:29,848 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2024-11-13 23:27:29,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-13 23:27:29,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 23:27:29,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-13 23:27:29,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-13 23:27:29,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 23:27:29,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 23:27:30,021 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 23:27:30,024 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 23:27:30,051 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2024-11-13 23:27:30,468 INFO L? ?]: Removed 57 outVars from TransFormulas that were not future-live. [2024-11-13 23:27:30,471 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 23:27:30,571 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 23:27:30,574 INFO L316 CfgBuilder]: Removed 9 assume(true) statements. [2024-11-13 23:27:30,575 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:27:30 BoogieIcfgContainer [2024-11-13 23:27:30,575 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 23:27:30,583 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 23:27:30,583 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 23:27:30,591 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 23:27:30,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 11:27:29" (1/3) ... [2024-11-13 23:27:30,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cea5df4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:27:30, skipping insertion in model container [2024-11-13 23:27:30,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:27:29" (2/3) ... [2024-11-13 23:27:30,595 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cea5df4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:27:30, skipping insertion in model container [2024-11-13 23:27:30,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:27:30" (3/3) ... [2024-11-13 23:27:30,596 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-2.i [2024-11-13 23:27:30,618 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 23:27:30,622 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG sll_of_sll_nondet_append-2.i that has 3 procedures, 40 locations, 1 initial locations, 9 loop locations, and 1 error locations. [2024-11-13 23:27:30,699 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 23:27:30,718 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;@4a9683a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 23:27:30,720 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 23:27:30,726 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 32 states have (on average 1.59375) internal successors, (51), 34 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 23:27:30,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-13 23:27:30,737 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:27:30,738 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:27:30,740 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:27:30,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:27:30,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1329819632, now seen corresponding path program 1 times [2024-11-13 23:27:30,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:27:30,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620529445] [2024-11-13 23:27:30,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:27:30,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:27:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:27:31,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:27:31,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:27:31,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620529445] [2024-11-13 23:27:31,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620529445] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:27:31,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:27:31,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 23:27:31,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588935259] [2024-11-13 23:27:31,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:27:31,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:27:31,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:27:31,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:27:31,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:27:31,294 INFO L87 Difference]: Start difference. First operand has 39 states, 32 states have (on average 1.59375) internal successors, (51), 34 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:27:31,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:27:31,431 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2024-11-13 23:27:31,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:27:31,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-13 23:27:31,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:27:31,442 INFO L225 Difference]: With dead ends: 83 [2024-11-13 23:27:31,442 INFO L226 Difference]: Without dead ends: 37 [2024-11-13 23:27:31,447 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:27:31,452 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 5 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:27:31,455 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:27:31,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-13 23:27:31,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2024-11-13 23:27:31,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 23:27:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2024-11-13 23:27:31,500 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 14 [2024-11-13 23:27:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:27:31,500 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2024-11-13 23:27:31,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:27:31,501 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2024-11-13 23:27:31,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-13 23:27:31,503 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:27:31,504 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:27:31,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 23:27:31,504 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:27:31,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:27:31,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1221576248, now seen corresponding path program 1 times [2024-11-13 23:27:31,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:27:31,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229889463] [2024-11-13 23:27:31,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:27:31,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:27:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:27:32,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:27:32,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:27:32,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229889463] [2024-11-13 23:27:32,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229889463] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:27:32,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783769436] [2024-11-13 23:27:32,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:27:32,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:27:32,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:27:32,028 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:27:32,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 23:27:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:27:32,209 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 23:27:32,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:27:32,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:27:32,328 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:27:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:27:32,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783769436] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:27:32,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1562154186] [2024-11-13 23:27:32,431 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-13 23:27:32,431 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:27:32,434 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:27:32,439 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:27:32,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:27:33,889 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 85 for LOIs [2024-11-13 23:27:34,230 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:27:35,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1562154186] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:27:35,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:27:35,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 3, 4] total 18 [2024-11-13 23:27:35,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328700496] [2024-11-13 23:27:35,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:27:35,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 23:27:35,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:27:35,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 23:27:35,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-13 23:27:35,819 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:27:36,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:27:36,448 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2024-11-13 23:27:36,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 23:27:36,448 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-11-13 23:27:36,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:27:36,450 INFO L225 Difference]: With dead ends: 61 [2024-11-13 23:27:36,450 INFO L226 Difference]: Without dead ends: 44 [2024-11-13 23:27:36,452 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-11-13 23:27:36,454 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 23:27:36,454 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 133 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 23:27:36,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-13 23:27:36,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2024-11-13 23:27:36,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:27:36,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2024-11-13 23:27:36,471 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 18 [2024-11-13 23:27:36,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:27:36,473 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2024-11-13 23:27:36,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:27:36,475 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2024-11-13 23:27:36,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-13 23:27:36,476 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:27:36,476 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:27:36,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 23:27:36,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:27:36,685 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:27:36,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:27:36,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1915713215, now seen corresponding path program 1 times [2024-11-13 23:27:36,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:27:36,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297268723] [2024-11-13 23:27:36,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:27:36,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:27:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:27:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:27:36,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:27:36,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297268723] [2024-11-13 23:27:36,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297268723] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:27:36,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906770848] [2024-11-13 23:27:36,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:27:36,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:27:36,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:27:36,895 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:27:36,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 23:27:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:27:37,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 23:27:37,047 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:27:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:27:37,097 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:27:37,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:27:37,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906770848] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:27:37,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [345461349] [2024-11-13 23:27:37,135 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-13 23:27:37,135 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:27:37,136 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:27:37,136 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:27:37,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:27:39,129 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 85 for LOIs [2024-11-13 23:27:40,773 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:28:03,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [345461349] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:28:03,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:28:03,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [4, 3, 4] total 21 [2024-11-13 23:28:03,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510765490] [2024-11-13 23:28:03,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:28:03,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 23:28:03,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:28:03,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 23:28:03,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=347, Unknown=7, NotChecked=0, Total=420 [2024-11-13 23:28:03,508 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 13 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:28:06,638 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] [2024-11-13 23:28:07,541 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_#memory_int_73| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_64| (Array Int (Array Int Int))) (|v_#memory_int_40| (Array Int (Array Int Int))) (|v_sll_append_~head#1.base_17| Int) (|v_#memory_int_74| (Array Int (Array Int Int))) (|v_sll_append_~head#1.offset_17| Int) (|v_sll_append_sll_create_~head~0#1.base_30| Int) (|v_#memory_$Pointer$.offset_64| (Array Int (Array Int Int))) (|v_sll_append_sll_create_~head~0#1.offset_30| Int) (|v_#memory_int_39| (Array Int (Array Int Int))) (|v_sll_append_sll_create_~len#1_29| Int)) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|))) (let ((.cse0 (store |v_#memory_$Pointer$.offset_64| .cse3 (store (store (select |v_#memory_$Pointer$.offset_64| .cse3) 4 0) 0 0))) (.cse6 (store |v_#memory_$Pointer$.base_64| .cse3 (store (store (select |v_#memory_$Pointer$.base_64| .cse3) 4 |v_sll_append_sll_create_~head~0#1.base_30|) 0 0)))) (let ((.cse2 (select .cse6 |v_sll_append_~head#1.base_17|)) (.cse4 (select |v_#memory_int_39| .cse3)) (.cse1 (select .cse0 |v_sll_append_~head#1.base_17|)) (.cse5 (select |v_#memory_int_40| .cse3))) (and (= |v_sll_append_sll_create_~head~0#1.offset_30| 0) (= |c_#memory_$Pointer$.offset| (store .cse0 |v_sll_append_~head#1.base_17| (store .cse1 |v_sll_append_~head#1.offset_17| 0))) (exists ((|v_#memory_int_72| (Array Int (Array Int Int)))) (= |v_#memory_int_73| (store |v_#memory_int_72| |v_sll_append_sll_create_~head~0#1.base_30| (store (select |v_#memory_int_72| |v_sll_append_sll_create_~head~0#1.base_30|) 0 (select (select |v_#memory_int_73| |v_sll_append_sll_create_~head~0#1.base_30|) 0))))) (= (select .cse2 |v_sll_append_~head#1.offset_17|) 0) (not (= |v_sll_append_sll_create_~head~0#1.base_30| 0)) (= |v_#memory_int_40| (store |v_#memory_int_39| .cse3 (store .cse4 0 (select .cse5 0)))) (= |c_#memory_$Pointer$.base| (store .cse6 |v_sll_append_~head#1.base_17| (store .cse2 |v_sll_append_~head#1.offset_17| .cse3))) (exists ((|v_#memory_$Pointer$.base_63| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_63| |v_sll_append_sll_create_~head~0#1.base_30| (store (select |v_#memory_$Pointer$.base_63| |v_sll_append_sll_create_~head~0#1.base_30|) 0 (select (select |v_#memory_$Pointer$.base_64| |v_sll_append_sll_create_~head~0#1.base_30|) 0))) |v_#memory_$Pointer$.base_64|)) (= |v_#memory_int_39| (store |v_#memory_int_73| .cse3 (store (select |v_#memory_int_73| .cse3) 4 (select .cse4 4)))) (= (store |v_#memory_int_74| |v_sll_append_~head#1.base_17| (store (select |v_#memory_int_74| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17| (select (select |c_#memory_int| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|))) |c_#memory_int|) (exists ((|v_#memory_$Pointer$.offset_63| (Array Int (Array Int Int)))) (= |v_#memory_$Pointer$.offset_64| (store |v_#memory_$Pointer$.offset_63| |v_sll_append_sll_create_~head~0#1.base_30| (store (select |v_#memory_$Pointer$.offset_63| |v_sll_append_sll_create_~head~0#1.base_30|) 0 0)))) (= (select .cse1 |v_sll_append_~head#1.offset_17|) 0) (= |v_sll_append_sll_create_~len#1_29| 0) (= |v_#memory_int_74| (store |v_#memory_int_40| .cse3 (store .cse5 0 (select (select |v_#memory_int_74| .cse3) 0))))))))) (exists ((|v_ULTIMATE.start_main_~i~0#1_46| Int)) (and (= |c_ULTIMATE.start_main_~min~0#1| 3) (= |c_ULTIMATE.start_main_~#head~1#1.offset| 0) (<= 6 |v_ULTIMATE.start_main_~i~0#1_46|) (<= 1 |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_main_~j~0#1| 0) (<= 2 |c_ULTIMATE.start_main_~#head~1#1.base|) (= 5 |c_ULTIMATE.start_main_~max~0#1|))) (exists ((|v_sll_append_~head#1.base_18| Int) (|v_#memory_int_40| (Array Int (Array Int Int))) (|v_sll_append_sll_create_~len#1_34| Int) (|v_sll_append_~head#1.offset_18| Int) (|v_#memory_$Pointer$.base_70| (Array Int (Array Int Int))) (|v_#memory_int_79| (Array Int (Array Int Int))) (|v_#memory_int_39| (Array Int (Array Int Int))) (|v_sll_append_sll_create_~head~0#1.offset_35| Int) (|v_#memory_int_80| (Array Int (Array Int Int))) (|v_sll_append_sll_create_~head~0#1.base_35| Int) (|v_#memory_$Pointer$.offset_70| (Array Int (Array Int Int)))) (let ((.cse7 (select (select |c_#memory_$Pointer$.base| |v_sll_append_~head#1.base_18|) |v_sll_append_~head#1.offset_18|))) (let ((.cse13 (store |v_#memory_$Pointer$.base_70| .cse7 (store (store (select |v_#memory_$Pointer$.base_70| .cse7) 4 |v_sll_append_sll_create_~head~0#1.base_35|) 0 0))) (.cse10 (store |v_#memory_$Pointer$.offset_70| .cse7 (store (store (select |v_#memory_$Pointer$.offset_70| .cse7) 4 0) 0 0)))) (let ((.cse11 (select .cse10 |v_sll_append_~head#1.base_18|)) (.cse8 (select |v_#memory_int_40| .cse7)) (.cse9 (select .cse13 |v_sll_append_~head#1.base_18|)) (.cse12 (select |v_#memory_int_39| .cse7))) (and (= |c_#memory_int| (store |v_#memory_int_80| |v_sll_append_~head#1.base_18| (store (select |v_#memory_int_80| |v_sll_append_~head#1.base_18|) |v_sll_append_~head#1.offset_18| (select (select |c_#memory_int| |v_sll_append_~head#1.base_18|) |v_sll_append_~head#1.offset_18|)))) (= |v_#memory_int_80| (store |v_#memory_int_40| .cse7 (store .cse8 0 (select (select |v_#memory_int_80| .cse7) 0)))) (not (= |v_sll_append_sll_create_~head~0#1.base_35| 0)) (exists ((|v_#memory_$Pointer$.offset_69| (Array Int (Array Int Int)))) (= |v_#memory_$Pointer$.offset_70| (store |v_#memory_$Pointer$.offset_69| |v_sll_append_sll_create_~head~0#1.base_35| (store (select |v_#memory_$Pointer$.offset_69| |v_sll_append_sll_create_~head~0#1.base_35|) 0 0)))) (= (select .cse9 |v_sll_append_~head#1.offset_18|) 0) (exists ((|v_#memory_$Pointer$.base_69| (Array Int (Array Int Int)))) (= |v_#memory_$Pointer$.base_70| (store |v_#memory_$Pointer$.base_69| |v_sll_append_sll_create_~head~0#1.base_35| (store (select |v_#memory_$Pointer$.base_69| |v_sll_append_sll_create_~head~0#1.base_35|) 0 (select (select |v_#memory_$Pointer$.base_70| |v_sll_append_sll_create_~head~0#1.base_35|) 0))))) (= (store .cse10 |v_sll_append_~head#1.base_18| (store .cse11 |v_sll_append_~head#1.offset_18| 0)) |c_#memory_$Pointer$.offset|) (= (select .cse11 |v_sll_append_~head#1.offset_18|) 0) (= |v_#memory_int_40| (store |v_#memory_int_39| .cse7 (store .cse12 0 (select .cse8 0)))) (= |v_sll_append_sll_create_~head~0#1.offset_35| 0) (= |c_#memory_$Pointer$.base| (store .cse13 |v_sll_append_~head#1.base_18| (store .cse9 |v_sll_append_~head#1.offset_18| .cse7))) (exists ((|v_#memory_int_78| (Array Int (Array Int Int)))) (= (store |v_#memory_int_78| |v_sll_append_sll_create_~head~0#1.base_35| (store (select |v_#memory_int_78| |v_sll_append_sll_create_~head~0#1.base_35|) 0 (select (select |v_#memory_int_79| |v_sll_append_sll_create_~head~0#1.base_35|) 0))) |v_#memory_int_79|)) (= |v_#memory_int_39| (store |v_#memory_int_79| .cse7 (store (select |v_#memory_int_79| .cse7) 4 (select .cse12 4)))) (= |v_sll_append_sll_create_~len#1_34| 0))))))) is different from true [2024-11-13 23:28:09,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:28:11,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:28:14,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:28:16,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:28:18,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:28:20,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:28:22,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:28:24,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:28:26,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:28:29,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:28:31,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:28:33,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:28:35,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:28:37,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:28:39,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:28:42,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:28:44,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:28:46,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:28:48,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:28:51,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:28:53,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:28:55,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:28:57,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:28:59,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:29:01,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:29:02,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:29:02,044 INFO L93 Difference]: Finished difference Result 72 states and 101 transitions. [2024-11-13 23:29:02,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 23:29:02,045 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 13 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-11-13 23:29:02,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:29:02,046 INFO L225 Difference]: With dead ends: 72 [2024-11-13 23:29:02,047 INFO L226 Difference]: Without dead ends: 62 [2024-11-13 23:29:02,047 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=74, Invalid=383, Unknown=9, NotChecked=40, Total=506 [2024-11-13 23:29:02,048 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 4 mSolverCounterUnsat, 26 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 26 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 58.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:29:02,048 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 204 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 536 Invalid, 26 Unknown, 14 Unchecked, 58.3s Time] [2024-11-13 23:29:02,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-13 23:29:02,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2024-11-13 23:29:02,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 45 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 23:29:02,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2024-11-13 23:29:02,061 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 21 [2024-11-13 23:29:02,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:29:02,061 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2024-11-13 23:29:02,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 13 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:29:02,062 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2024-11-13 23:29:02,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-13 23:29:02,063 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:29:02,063 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:29:02,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 23:29:02,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:29:02,263 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:29:02,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:29:02,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1913966230, now seen corresponding path program 1 times [2024-11-13 23:29:02,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:29:02,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455930813] [2024-11-13 23:29:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:29:02,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:29:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:29:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:29:02,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:29:02,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455930813] [2024-11-13 23:29:02,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455930813] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:29:02,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947427049] [2024-11-13 23:29:02,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:29:02,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:29:02,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:29:02,370 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:29:02,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 23:29:02,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:29:02,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 23:29:02,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:29:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:29:02,532 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:29:02,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:29:02,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947427049] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:29:02,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [182967658] [2024-11-13 23:29:02,556 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-13 23:29:02,557 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:29:02,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:29:02,557 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:29:02,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:29:04,017 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 85 for LOIs [2024-11-13 23:29:04,781 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:29:06,266 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_#memory_int_40| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_88| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_88| (Array Int (Array Int Int))) (|v_sll_append_sll_create_~head~0#1.base_49| Int) (|v_#memory_int_101| (Array Int (Array Int Int))) (|v_#memory_int_39| (Array Int (Array Int Int))) (|v_#memory_int_102| (Array Int (Array Int Int))) (|v_sll_append_~new_last~0#1.base_23| Int)) (let ((.cse6 (store |v_#memory_$Pointer$.base_88| |v_sll_append_~new_last~0#1.base_23| (store (store (select |v_#memory_$Pointer$.base_88| |v_sll_append_~new_last~0#1.base_23|) 4 |v_sll_append_sll_create_~head~0#1.base_49|) 0 0)))) (let ((.cse0 (store |v_#memory_$Pointer$.offset_88| |v_sll_append_~new_last~0#1.base_23| (store (store (select |v_#memory_$Pointer$.offset_88| |v_sll_append_~new_last~0#1.base_23|) 4 0) 0 0))) (.cse1 (select (select .cse6 |c_sll_append_~head#1.base|) |c_sll_append_~head#1.offset|))) (let ((.cse4 (select |v_#memory_int_39| |v_sll_append_~new_last~0#1.base_23|)) (.cse2 (select .cse0 .cse1)) (.cse5 (select |v_#memory_int_40| |v_sll_append_~new_last~0#1.base_23|)) (.cse7 (select .cse6 .cse1)) (.cse3 (select (select .cse0 |c_sll_append_~head#1.base|) |c_sll_append_~head#1.offset|))) (and (= (store .cse0 .cse1 (store .cse2 .cse3 0)) |c_#memory_$Pointer$.offset|) (= |v_#memory_int_39| (store |v_#memory_int_101| |v_sll_append_~new_last~0#1.base_23| (store (select |v_#memory_int_101| |v_sll_append_~new_last~0#1.base_23|) 4 (select .cse4 4)))) (= (store |v_#memory_int_39| |v_sll_append_~new_last~0#1.base_23| (store .cse4 0 (select .cse5 0))) |v_#memory_int_40|) (= (select .cse2 .cse3) 0) (= (store |v_#memory_int_40| |v_sll_append_~new_last~0#1.base_23| (store .cse5 0 (select (select |v_#memory_int_102| |v_sll_append_~new_last~0#1.base_23|) 0))) |v_#memory_int_102|) (= |c_#memory_$Pointer$.base| (store .cse6 .cse1 (store .cse7 .cse3 |v_sll_append_~new_last~0#1.base_23|))) (= (store |v_#memory_int_102| .cse1 (store (select |v_#memory_int_102| .cse1) .cse3 (select (select |c_#memory_int| .cse1) .cse3))) |c_#memory_int|) (or (not (= .cse3 0)) (not (= 0 .cse1))) (= (select .cse7 .cse3) 0)))))) is different from true [2024-11-13 23:29:21,961 WARN L286 SmtUtils]: Spent 5.07s on a formula simplification. DAG size of input: 272 DAG size of output: 162 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 23:29:34,197 WARN L286 SmtUtils]: Spent 5.66s on a formula simplification. DAG size of input: 277 DAG size of output: 167 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 23:29:34,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [182967658] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:29:34,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:29:34,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [4, 3, 4] total 24 [2024-11-13 23:29:34,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487086785] [2024-11-13 23:29:34,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:29:34,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 23:29:34,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:29:34,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 23:29:34,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=429, Unknown=2, NotChecked=42, Total=552 [2024-11-13 23:29:34,201 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 16 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:29:47,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:29:56,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:30:02,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:30:06,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:30:14,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:30:15,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:30:15,047 INFO L93 Difference]: Finished difference Result 78 states and 107 transitions. [2024-11-13 23:30:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 23:30:15,051 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 16 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2024-11-13 23:30:15,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:30:15,054 INFO L225 Difference]: With dead ends: 78 [2024-11-13 23:30:15,056 INFO L226 Difference]: Without dead ends: 68 [2024-11-13 23:30:15,057 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=85, Invalid=469, Unknown=2, NotChecked=44, Total=600 [2024-11-13 23:30:15,058 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 10 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 40.7s IncrementalHoareTripleChecker+Time [2024-11-13 23:30:15,058 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 237 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 573 Invalid, 4 Unknown, 108 Unchecked, 40.7s Time] [2024-11-13 23:30:15,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-13 23:30:15,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2024-11-13 23:30:15,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 states have internal predecessors, (64), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 23:30:15,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 71 transitions. [2024-11-13 23:30:15,084 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 71 transitions. Word has length 24 [2024-11-13 23:30:15,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:30:15,085 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 71 transitions. [2024-11-13 23:30:15,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 16 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:30:15,085 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 71 transitions. [2024-11-13 23:30:15,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-13 23:30:15,088 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:30:15,088 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:30:15,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 23:30:15,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:30:15,292 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:30:15,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:30:15,292 INFO L85 PathProgramCache]: Analyzing trace with hash 998073788, now seen corresponding path program 1 times [2024-11-13 23:30:15,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:30:15,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494429653] [2024-11-13 23:30:15,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:30:15,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:30:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:30:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:30:15,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:30:15,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494429653] [2024-11-13 23:30:15,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494429653] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:30:15,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006233045] [2024-11-13 23:30:15,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:30:15,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:30:15,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:30:15,414 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:30:15,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 23:30:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:30:15,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 23:30:15,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:30:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:30:15,616 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:30:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:30:15,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006233045] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:30:15,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1597604899] [2024-11-13 23:30:15,649 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-13 23:30:15,649 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:30:15,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:30:15,649 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:30:15,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:30:17,696 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 85 for LOIs [2024-11-13 23:30:18,375 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:30:23,769 WARN L286 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 252 DAG size of output: 132 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 23:31:22,607 WARN L286 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 245 DAG size of output: 132 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 23:31:38,734 WARN L286 SmtUtils]: Spent 5.00s on a formula simplification. DAG size of input: 247 DAG size of output: 132 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 23:31:38,736 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1296#(and (exists ((|v_ULTIMATE.start_main_~i~0#1_67| Int) (|v_ULTIMATE.start_main_~max~0#1_16| Int)) (and (exists ((|v_ULTIMATE.start_main_~i~0#1_66| Int)) (and (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~i~0#1_67| 3) (= |ULTIMATE.start_main_~#head~1#1.offset| 0) (= 5 |v_ULTIMATE.start_main_~max~0#1_16|) (<= 2 |ULTIMATE.start_main_~#head~1#1.base|) (<= 6 |v_ULTIMATE.start_main_~i~0#1_66|) (= |ULTIMATE.start_main_~j~0#1| 0))) (exists ((|v_#memory_int_118| (Array Int (Array Int Int))) (|v_#memory_int_40| (Array Int (Array Int Int))) (|v_sll_append_sll_create_~len#1_57| Int) (|v_sll_append_sll_create_~head~0#1.offset_58| Int) (|v_#memory_int_117| (Array Int (Array Int Int))) (|v_#memory_int_39| (Array Int (Array Int Int))) (|v_sll_append_~head#1.base_25| Int) (|v_sll_append_sll_create_~head~0#1.base_58| Int) (|v_#memory_$Pointer$.offset_100| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_100| (Array Int (Array Int Int))) (|v_sll_append_~head#1.offset_25| Int)) (and (= |v_#memory_int_39| (store |v_#memory_int_117| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|) (store (select |v_#memory_int_117| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|)) 4 (select (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|)) 4)))) (= (store (store |v_#memory_$Pointer$.base_100| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|) (store (store (select |v_#memory_$Pointer$.base_100| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|)) 4 |v_sll_append_sll_create_~head~0#1.base_58|) 0 0)) |v_sll_append_~head#1.base_25| (store (select (store |v_#memory_$Pointer$.base_100| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|) (store (store (select |v_#memory_$Pointer$.base_100| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|)) 4 |v_sll_append_sll_create_~head~0#1.base_58|) 0 0)) |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|))) |#memory_$Pointer$.base|) (exists ((|v_#memory_$Pointer$.offset_99| (Array Int (Array Int Int)))) (= |v_#memory_$Pointer$.offset_100| (store |v_#memory_$Pointer$.offset_99| |v_sll_append_sll_create_~head~0#1.base_58| (store (select |v_#memory_$Pointer$.offset_99| |v_sll_append_sll_create_~head~0#1.base_58|) 0 0)))) (= (select (select (store |v_#memory_$Pointer$.offset_100| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|) (store (store (select |v_#memory_$Pointer$.offset_100| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|)) 4 0) 0 0)) |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|) 0) (not (= |v_sll_append_sll_create_~head~0#1.base_58| 0)) (exists ((|v_#memory_$Pointer$.base_99| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_99| |v_sll_append_sll_create_~head~0#1.base_58| (store (select |v_#memory_$Pointer$.base_99| |v_sll_append_sll_create_~head~0#1.base_58|) 0 (select (select |v_#memory_$Pointer$.base_100| |v_sll_append_sll_create_~head~0#1.base_58|) 0))) |v_#memory_$Pointer$.base_100|)) (= |#memory_int| (store |v_#memory_int_118| |v_sll_append_~head#1.base_25| (store (select |v_#memory_int_118| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25| (select (select |#memory_int| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|)))) (exists ((|v_#memory_int_116| (Array Int (Array Int Int)))) (= (store |v_#memory_int_116| |v_sll_append_sll_create_~head~0#1.base_58| (store (select |v_#memory_int_116| |v_sll_append_sll_create_~head~0#1.base_58|) 0 (select (select |v_#memory_int_117| |v_sll_append_sll_create_~head~0#1.base_58|) 0))) |v_#memory_int_117|)) (= |v_#memory_int_40| (store |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|) (store (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|)) 0 (select (select |v_#memory_int_40| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|)) 0)))) (= |v_sll_append_sll_create_~head~0#1.offset_58| 0) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_100| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|) (store (store (select |v_#memory_$Pointer$.offset_100| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|)) 4 0) 0 0)) |v_sll_append_~head#1.base_25| (store (select (store |v_#memory_$Pointer$.offset_100| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|) (store (store (select |v_#memory_$Pointer$.offset_100| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|)) 4 0) 0 0)) |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25| 0))) (= (select (select (store |v_#memory_$Pointer$.base_100| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|) (store (store (select |v_#memory_$Pointer$.base_100| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|)) 4 |v_sll_append_sll_create_~head~0#1.base_58|) 0 0)) |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|) 0) (= (store |v_#memory_int_40| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|) (store (select |v_#memory_int_40| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|)) 0 (select (select |v_#memory_int_118| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_25|) |v_sll_append_~head#1.offset_25|)) 0))) |v_#memory_int_118|) (= |v_sll_append_sll_create_~len#1_57| 0))))) (= |ULTIMATE.start_main_~ptr~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#head~1#1.base|) |ULTIMATE.start_main_~#head~1#1.offset|)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#head~1#1.base|) |ULTIMATE.start_main_~#head~1#1.offset|) |ULTIMATE.start_main_~ptr~0#1.base|) (or (not (= |ULTIMATE.start_main_~ptr~0#1.base| 0)) (not (= |ULTIMATE.start_main_~ptr~0#1.offset| 0))) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) 0))' at error location [2024-11-13 23:31:38,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:31:38,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:31:38,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2024-11-13 23:31:38,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109082485] [2024-11-13 23:31:38,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:31:38,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 23:31:38,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:31:38,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 23:31:38,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=519, Unknown=27, NotChecked=0, Total=650 [2024-11-13 23:31:38,739 INFO L87 Difference]: Start difference. First operand 54 states and 71 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-13 23:31:38,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:31:38,845 INFO L93 Difference]: Finished difference Result 120 states and 160 transitions. [2024-11-13 23:31:38,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 23:31:38,846 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2024-11-13 23:31:38,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:31:38,848 INFO L225 Difference]: With dead ends: 120 [2024-11-13 23:31:38,848 INFO L226 Difference]: Without dead ends: 78 [2024-11-13 23:31:38,849 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 80.4s TimeCoverageRelationStatistics Valid=104, Invalid=519, Unknown=27, NotChecked=0, Total=650 [2024-11-13 23:31:38,850 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 26 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:31:38,850 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 73 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:31:38,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-13 23:31:38,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2024-11-13 23:31:38,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 69 states have (on average 1.289855072463768) internal successors, (89), 69 states have internal predecessors, (89), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 23:31:38,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2024-11-13 23:31:38,871 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 26 [2024-11-13 23:31:38,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:31:38,871 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2024-11-13 23:31:38,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-13 23:31:38,871 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2024-11-13 23:31:38,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-13 23:31:38,873 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:31:38,873 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:31:38,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 23:31:39,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:31:39,074 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:31:39,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:31:39,075 INFO L85 PathProgramCache]: Analyzing trace with hash 2113492556, now seen corresponding path program 2 times [2024-11-13 23:31:39,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:31:39,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111392963] [2024-11-13 23:31:39,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:31:39,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:31:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:31:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 23:31:39,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:31:39,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111392963] [2024-11-13 23:31:39,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111392963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:31:39,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861285631] [2024-11-13 23:31:39,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:31:39,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:31:39,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:31:39,409 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:31:39,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 23:31:39,590 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 23:31:39,590 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:31:39,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 23:31:39,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:31:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 23:31:39,700 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:31:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 23:31:39,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861285631] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:31:39,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1279404497] [2024-11-13 23:31:39,993 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-13 23:31:39,995 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:31:39,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:31:39,996 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:31:39,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:31:41,388 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 85 for LOIs [2024-11-13 23:31:42,433 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:32:41,937 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1806#(and (= |ULTIMATE.start_main_~ptr~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#head~1#1.base|) |ULTIMATE.start_main_~#head~1#1.offset|)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#head~1#1.base|) |ULTIMATE.start_main_~#head~1#1.offset|) |ULTIMATE.start_main_~ptr~0#1.base|) (or (not (= |ULTIMATE.start_main_~ptr~0#1.base| 0)) (not (= |ULTIMATE.start_main_~ptr~0#1.offset| 0))) (exists ((|v_ULTIMATE.start_main_~max~0#1_17| Int) (|v_ULTIMATE.start_main_~i~0#1_77| Int)) (and (exists ((|v_#memory_int_40| (Array Int (Array Int Int))) (|v_sll_append_sll_create_~head~0#1.base_74| Int) (|v_#memory_int_143| (Array Int (Array Int Int))) (|v_sll_append_~head#1.base_31| Int) (|v_sll_append_~head#1.offset_31| Int) (|v_#memory_int_39| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_121| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_121| (Array Int (Array Int Int))) (|v_#memory_int_142| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_40| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|) (store (select |v_#memory_int_40| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|)) 0 (select (select |v_#memory_int_143| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|)) 0))) |v_#memory_int_143|) (= |v_#memory_int_40| (store |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|) (store (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|)) 0 (select (select |v_#memory_int_40| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|)) 0)))) (= |v_#memory_int_39| (store |v_#memory_int_142| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|) (store (select |v_#memory_int_142| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|)) 4 (select (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|)) 4)))) (= (select (select (store |v_#memory_$Pointer$.base_121| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|) (store (store (select |v_#memory_$Pointer$.base_121| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|)) 4 |v_sll_append_sll_create_~head~0#1.base_74|) 0 0)) |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|) 0) (= (select (select (store |v_#memory_$Pointer$.offset_121| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|) (store (store (select |v_#memory_$Pointer$.offset_121| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|)) 4 0) 0 0)) |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|) 0) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_121| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|) (store (store (select |v_#memory_$Pointer$.offset_121| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|)) 4 0) 0 0)) |v_sll_append_~head#1.base_31| (store (select (store |v_#memory_$Pointer$.offset_121| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|) (store (store (select |v_#memory_$Pointer$.offset_121| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|)) 4 0) 0 0)) |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31| 0))) (= |#memory_int| (store |v_#memory_int_143| |v_sll_append_~head#1.base_31| (store (select |v_#memory_int_143| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31| (select (select |#memory_int| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|)))) (= |#memory_$Pointer$.base| (store (store |v_#memory_$Pointer$.base_121| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|) (store (store (select |v_#memory_$Pointer$.base_121| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|)) 4 |v_sll_append_sll_create_~head~0#1.base_74|) 0 0)) |v_sll_append_~head#1.base_31| (store (select (store |v_#memory_$Pointer$.base_121| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|) (store (store (select |v_#memory_$Pointer$.base_121| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|)) 4 |v_sll_append_sll_create_~head~0#1.base_74|) 0 0)) |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_31|) |v_sll_append_~head#1.offset_31|)))))) (exists ((|v_ULTIMATE.start_main_~i~0#1_76| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 6 |v_ULTIMATE.start_main_~i~0#1_76|) (= 5 |v_ULTIMATE.start_main_~max~0#1_17|) (= |ULTIMATE.start_main_~#head~1#1.offset| 0) (= |v_ULTIMATE.start_main_~i~0#1_77| 3) (<= 2 |ULTIMATE.start_main_~#head~1#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0))))) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) 0))' at error location [2024-11-13 23:32:41,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:32:41,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:32:41,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-11-13 23:32:41,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377435992] [2024-11-13 23:32:41,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:32:41,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 23:32:41,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:32:41,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 23:32:41,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=819, Unknown=9, NotChecked=0, Total=930 [2024-11-13 23:32:41,939 INFO L87 Difference]: Start difference. First operand 77 states and 100 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 23:32:42,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:32:42,093 INFO L93 Difference]: Finished difference Result 149 states and 198 transitions. [2024-11-13 23:32:42,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 23:32:42,094 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2024-11-13 23:32:42,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:32:42,096 INFO L225 Difference]: With dead ends: 149 [2024-11-13 23:32:42,096 INFO L226 Difference]: Without dead ends: 94 [2024-11-13 23:32:42,097 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 72 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 59.7s TimeCoverageRelationStatistics Valid=102, Invalid=819, Unknown=9, NotChecked=0, Total=930 [2024-11-13 23:32:42,101 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 18 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:32:42,101 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 216 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:32:42,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-13 23:32:42,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2024-11-13 23:32:42,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 81 states have (on average 1.2962962962962963) internal successors, (105), 82 states have internal predecessors, (105), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-13 23:32:42,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 118 transitions. [2024-11-13 23:32:42,143 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 118 transitions. Word has length 34 [2024-11-13 23:32:42,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:32:42,143 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 118 transitions. [2024-11-13 23:32:42,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 23:32:42,143 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 118 transitions. [2024-11-13 23:32:42,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-13 23:32:42,145 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:32:42,145 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:32:42,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 23:32:42,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:32:42,350 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:32:42,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:32:42,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1488771917, now seen corresponding path program 3 times [2024-11-13 23:32:42,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:32:42,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070306010] [2024-11-13 23:32:42,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:32:42,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:32:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:32:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 23:32:42,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:32:42,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070306010] [2024-11-13 23:32:42,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070306010] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:32:42,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333217316] [2024-11-13 23:32:42,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:32:42,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:32:42,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:32:42,669 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:32:42,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 23:32:42,860 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:32:42,860 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:32:42,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 23:32:42,864 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:32:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 23:32:42,944 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:32:43,235 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 23:32:43,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333217316] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:32:43,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [678358626] [2024-11-13 23:32:43,237 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-13 23:32:43,237 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:32:43,237 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:32:43,238 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:32:43,238 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:32:44,955 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 85 for LOIs [2024-11-13 23:32:45,905 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:32:51,168 WARN L286 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 252 DAG size of output: 132 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 23:33:42,351 WARN L286 SmtUtils]: Spent 5.33s on a formula simplification. DAG size of input: 247 DAG size of output: 134 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 23:34:16,080 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2391#(and (= |ULTIMATE.start_main_~ptr~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#head~1#1.base|) |ULTIMATE.start_main_~#head~1#1.offset|)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#head~1#1.base|) |ULTIMATE.start_main_~#head~1#1.offset|) |ULTIMATE.start_main_~ptr~0#1.base|) (or (not (= |ULTIMATE.start_main_~ptr~0#1.base| 0)) (not (= |ULTIMATE.start_main_~ptr~0#1.offset| 0))) (exists ((|v_ULTIMATE.start_main_~i~0#1_87| Int) (|v_ULTIMATE.start_main_~max~0#1_18| Int)) (and (exists ((|v_ULTIMATE.start_main_~i~0#1_86| Int)) (and (<= 1 |#StackHeapBarrier|) (= 5 |v_ULTIMATE.start_main_~max~0#1_18|) (= |ULTIMATE.start_main_~#head~1#1.offset| 0) (<= 6 |v_ULTIMATE.start_main_~i~0#1_86|) (<= 2 |ULTIMATE.start_main_~#head~1#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |v_ULTIMATE.start_main_~i~0#1_87| 3))) (exists ((|v_#memory_int_40| (Array Int (Array Int Int))) (|v_#memory_int_170| (Array Int (Array Int Int))) (|v_sll_append_~head#1.base_37| Int) (|v_#memory_int_169| (Array Int (Array Int Int))) (|v_sll_append_sll_create_~head~0#1.offset_92| Int) (|v_sll_append_sll_create_~head~0#1.base_92| Int) (|v_sll_append_sll_create_~len#1_108| Int) (|v_#memory_int_39| (Array Int (Array Int Int))) (|v_sll_append_~head#1.offset_37| Int) (|v_#memory_$Pointer$.offset_144| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_144| (Array Int (Array Int Int)))) (and (= (select (select (store |v_#memory_$Pointer$.base_144| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|) (store (store (select |v_#memory_$Pointer$.base_144| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|)) 4 |v_sll_append_sll_create_~head~0#1.base_92|) 0 0)) |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|) 0) (= |#memory_int| (store |v_#memory_int_170| |v_sll_append_~head#1.base_37| (store (select |v_#memory_int_170| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37| (select (select |#memory_int| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|)))) (= (store |v_#memory_int_40| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|) (store (select |v_#memory_int_40| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|)) 0 (select (select |v_#memory_int_170| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|)) 0))) |v_#memory_int_170|) (= |v_#memory_int_40| (store |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|) (store (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|)) 0 (select (select |v_#memory_int_40| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|)) 0)))) (= (store |v_#memory_int_169| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|) (store (select |v_#memory_int_169| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|)) 4 (select (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|)) 4))) |v_#memory_int_39|) (exists ((|v_#memory_$Pointer$.base_143| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_143| |v_sll_append_sll_create_~head~0#1.base_92| (store (select |v_#memory_$Pointer$.base_143| |v_sll_append_sll_create_~head~0#1.base_92|) 0 (select (select |v_#memory_$Pointer$.base_144| |v_sll_append_sll_create_~head~0#1.base_92|) 0))) |v_#memory_$Pointer$.base_144|)) (= (select (select (store |v_#memory_$Pointer$.offset_144| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|) (store (store (select |v_#memory_$Pointer$.offset_144| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|)) 4 0) 0 0)) |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|) 0) (= |v_sll_append_sll_create_~head~0#1.offset_92| 0) (exists ((|v_#memory_int_168| (Array Int (Array Int Int)))) (= (store |v_#memory_int_168| |v_sll_append_sll_create_~head~0#1.base_92| (store (select |v_#memory_int_168| |v_sll_append_sll_create_~head~0#1.base_92|) 0 (select (select |v_#memory_int_169| |v_sll_append_sll_create_~head~0#1.base_92|) 0))) |v_#memory_int_169|)) (not (= |v_sll_append_sll_create_~head~0#1.base_92| 0)) (exists ((|v_#memory_$Pointer$.offset_143| (Array Int (Array Int Int)))) (= |v_#memory_$Pointer$.offset_144| (store |v_#memory_$Pointer$.offset_143| |v_sll_append_sll_create_~head~0#1.base_92| (store (select |v_#memory_$Pointer$.offset_143| |v_sll_append_sll_create_~head~0#1.base_92|) 0 0)))) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_144| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|) (store (store (select |v_#memory_$Pointer$.offset_144| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|)) 4 0) 0 0)) |v_sll_append_~head#1.base_37| (store (select (store |v_#memory_$Pointer$.offset_144| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|) (store (store (select |v_#memory_$Pointer$.offset_144| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|)) 4 0) 0 0)) |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37| 0))) (= (store (store |v_#memory_$Pointer$.base_144| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|) (store (store (select |v_#memory_$Pointer$.base_144| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|)) 4 |v_sll_append_sll_create_~head~0#1.base_92|) 0 0)) |v_sll_append_~head#1.base_37| (store (select (store |v_#memory_$Pointer$.base_144| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|) (store (store (select |v_#memory_$Pointer$.base_144| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|)) 4 |v_sll_append_sll_create_~head~0#1.base_92|) 0 0)) |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_37|) |v_sll_append_~head#1.offset_37|))) |#memory_$Pointer$.base|) (= |v_sll_append_sll_create_~len#1_108| 0))))) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) 0))' at error location [2024-11-13 23:34:16,080 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:34:16,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:34:16,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2024-11-13 23:34:16,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595565707] [2024-11-13 23:34:16,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:34:16,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 23:34:16,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:34:16,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 23:34:16,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=984, Unknown=31, NotChecked=0, Total=1122 [2024-11-13 23:34:16,083 INFO L87 Difference]: Start difference. First operand 90 states and 118 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:34:16,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:34:16,248 INFO L93 Difference]: Finished difference Result 171 states and 229 transitions. [2024-11-13 23:34:16,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 23:34:16,248 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2024-11-13 23:34:16,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:34:16,250 INFO L225 Difference]: With dead ends: 171 [2024-11-13 23:34:16,250 INFO L226 Difference]: Without dead ends: 106 [2024-11-13 23:34:16,251 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 90.3s TimeCoverageRelationStatistics Valid=107, Invalid=984, Unknown=31, NotChecked=0, Total=1122 [2024-11-13 23:34:16,252 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 24 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:34:16,252 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 167 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:34:16,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-13 23:34:16,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2024-11-13 23:34:16,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 88 states have internal predecessors, (112), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-13 23:34:16,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 125 transitions. [2024-11-13 23:34:16,277 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 125 transitions. Word has length 37 [2024-11-13 23:34:16,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:34:16,278 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 125 transitions. [2024-11-13 23:34:16,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:34:16,278 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 125 transitions. [2024-11-13 23:34:16,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 23:34:16,280 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:34:16,280 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:34:16,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 23:34:16,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:34:16,482 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:34:16,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:34:16,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1798138092, now seen corresponding path program 4 times [2024-11-13 23:34:16,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:34:16,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855424018] [2024-11-13 23:34:16,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:34:16,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:34:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:34:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 23:34:17,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:34:17,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855424018] [2024-11-13 23:34:17,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855424018] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:34:17,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:34:17,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-13 23:34:17,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110542723] [2024-11-13 23:34:17,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:34:17,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 23:34:17,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:34:17,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 23:34:17,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-13 23:34:17,688 INFO L87 Difference]: Start difference. First operand 96 states and 125 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:34:18,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:34:18,503 INFO L93 Difference]: Finished difference Result 176 states and 244 transitions. [2024-11-13 23:34:18,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 23:34:18,503 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2024-11-13 23:34:18,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:34:18,505 INFO L225 Difference]: With dead ends: 176 [2024-11-13 23:34:18,506 INFO L226 Difference]: Without dead ends: 163 [2024-11-13 23:34:18,506 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-13 23:34:18,507 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 97 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 23:34:18,507 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 289 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 23:34:18,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-13 23:34:18,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 117. [2024-11-13 23:34:18,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 106 states have (on average 1.2924528301886793) internal successors, (137), 107 states have internal predecessors, (137), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2024-11-13 23:34:18,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 155 transitions. [2024-11-13 23:34:18,541 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 155 transitions. Word has length 40 [2024-11-13 23:34:18,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:34:18,541 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 155 transitions. [2024-11-13 23:34:18,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:34:18,541 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 155 transitions. [2024-11-13 23:34:18,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 23:34:18,543 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:34:18,543 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:34:18,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 23:34:18,543 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:34:18,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:34:18,544 INFO L85 PathProgramCache]: Analyzing trace with hash 536047457, now seen corresponding path program 1 times [2024-11-13 23:34:18,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:34:18,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081217856] [2024-11-13 23:34:18,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:34:18,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:34:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:34:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 23:34:18,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:34:18,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081217856] [2024-11-13 23:34:18,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081217856] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:34:18,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610519589] [2024-11-13 23:34:18,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:34:18,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:34:18,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:34:18,741 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:34:18,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 23:34:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:34:18,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 23:34:18,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:34:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-13 23:34:19,069 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 23:34:19,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610519589] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:34:19,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 23:34:19,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-13 23:34:19,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327032393] [2024-11-13 23:34:19,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:34:19,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:34:19,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:34:19,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:34:19,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-13 23:34:19,071 INFO L87 Difference]: Start difference. First operand 117 states and 155 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:34:19,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:34:19,219 INFO L93 Difference]: Finished difference Result 138 states and 187 transitions. [2024-11-13 23:34:19,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 23:34:19,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2024-11-13 23:34:19,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:34:19,222 INFO L225 Difference]: With dead ends: 138 [2024-11-13 23:34:19,222 INFO L226 Difference]: Without dead ends: 136 [2024-11-13 23:34:19,222 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-11-13 23:34:19,223 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 18 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:34:19,228 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 66 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:34:19,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-13 23:34:19,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2024-11-13 23:34:19,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 106 states have (on average 1.2924528301886793) internal successors, (137), 107 states have internal predecessors, (137), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2024-11-13 23:34:19,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 155 transitions. [2024-11-13 23:34:19,260 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 155 transitions. Word has length 40 [2024-11-13 23:34:19,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:34:19,261 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 155 transitions. [2024-11-13 23:34:19,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:34:19,261 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 155 transitions. [2024-11-13 23:34:19,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-13 23:34:19,262 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:34:19,262 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:34:19,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 23:34:19,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:34:19,463 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:34:19,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:34:19,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1865086953, now seen corresponding path program 1 times [2024-11-13 23:34:19,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:34:19,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781182523] [2024-11-13 23:34:19,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:34:19,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:34:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:34:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 23:34:21,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:34:21,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781182523] [2024-11-13 23:34:21,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781182523] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:34:21,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993967411] [2024-11-13 23:34:21,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:34:21,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:34:21,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:34:21,731 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:34:21,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 23:34:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:34:21,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-13 23:34:21,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:34:22,003 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 [2024-11-13 23:34:22,098 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 [2024-11-13 23:34:22,724 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 [2024-11-13 23:34:22,845 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2024-11-13 23:34:22,846 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 1 case distinctions, treesize of input 57 treesize of output 41 [2024-11-13 23:34:22,869 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 18 treesize of output 7 [2024-11-13 23:34:23,107 INFO L349 Elim1Store]: treesize reduction 88, result has 41.3 percent of original size [2024-11-13 23:34:23,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 90 [2024-11-13 23:34:23,231 INFO L349 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2024-11-13 23:34:23,232 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 23 treesize of output 22 [2024-11-13 23:34:23,738 INFO L349 Elim1Store]: treesize reduction 4, result has 95.9 percent of original size [2024-11-13 23:34:23,739 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 205 treesize of output 273 [2024-11-13 23:34:24,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:34:24,216 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 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-13 23:34:24,353 INFO L349 Elim1Store]: treesize reduction 41, result has 8.9 percent of original size [2024-11-13 23:34:24,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 34 [2024-11-13 23:34:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 23:34:24,357 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:34:24,936 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:34:24,941 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:34:24,943 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 0 case distinctions, treesize of input 16134 treesize of output 15526 [2024-11-13 23:34:25,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993967411] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:34:25,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [843697414] [2024-11-13 23:34:25,412 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-13 23:34:25,412 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:34:25,413 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:34:25,413 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:34:25,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:34:26,328 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 85 for LOIs [2024-11-13 23:34:27,225 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:34:32,507 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse0 (exists ((|v_#memory_int_40| (Array Int (Array Int Int))) (|v_sll_append_~head#1.offset_44| Int) (|v_#memory_int_199| (Array Int (Array Int Int))) (|v_#memory_int_200| (Array Int (Array Int Int))) (|v_#memory_int_39| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_169| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_168| (Array Int (Array Int Int))) (|v_sll_append_sll_create_~head~0#1.base_113| Int) (|v_sll_append_~head#1.base_44| Int)) (let ((.cse16 (select (select |c_#memory_$Pointer$.base| |v_sll_append_~head#1.base_44|) |v_sll_append_~head#1.offset_44|))) (let ((.cse22 (store |v_#memory_$Pointer$.offset_168| .cse16 (store (store (select |v_#memory_$Pointer$.offset_168| .cse16) 4 0) 0 0))) (.cse21 (store |v_#memory_$Pointer$.base_169| .cse16 (store (store (select |v_#memory_$Pointer$.base_169| .cse16) 4 |v_sll_append_sll_create_~head~0#1.base_113|) 0 0)))) (let ((.cse17 (select |v_#memory_int_39| .cse16)) (.cse19 (select |v_#memory_int_40| .cse16)) (.cse18 (select .cse21 |v_sll_append_~head#1.base_44|)) (.cse20 (select .cse22 |v_sll_append_~head#1.base_44|))) (and (= (store |v_#memory_int_199| .cse16 (store (select |v_#memory_int_199| .cse16) 4 (select .cse17 4))) |v_#memory_int_39|) (= (select .cse18 |v_sll_append_~head#1.offset_44|) 0) (= (store |v_#memory_int_39| .cse16 (store .cse17 0 (select .cse19 0))) |v_#memory_int_40|) (= (select .cse20 |v_sll_append_~head#1.offset_44|) 0) (= (store |v_#memory_int_40| .cse16 (store .cse19 0 (select (select |v_#memory_int_200| .cse16) 0))) |v_#memory_int_200|) (= |c_#memory_$Pointer$.base| (store .cse21 |v_sll_append_~head#1.base_44| (store .cse18 |v_sll_append_~head#1.offset_44| .cse16))) (= (store |v_#memory_int_200| |v_sll_append_~head#1.base_44| (store (select |v_#memory_int_200| |v_sll_append_~head#1.base_44|) |v_sll_append_~head#1.offset_44| (select (select |c_#memory_int| |v_sll_append_~head#1.base_44|) |v_sll_append_~head#1.offset_44|))) |c_#memory_int|) (= (store .cse22 |v_sll_append_~head#1.base_44| (store .cse20 |v_sll_append_~head#1.offset_44| 0)) |c_#memory_$Pointer$.offset|))))))) (.cse1 (+ |c_ULTIMATE.start_main_~max~0#1| 1)) (.cse10 (<= (+ |c_#StackHeapBarrier| 1) |c_ULTIMATE.start_main_~#head~1#1.base|)) (.cse11 (not (= |c_ULTIMATE.start_main_~#head~1#1.base| 0))) (.cse2 (= |c_ULTIMATE.start_main_~min~0#1| 3)) (.cse3 (= |c_ULTIMATE.start_main_~#head~1#1.offset| 0)) (.cse4 (<= 1 |c_#StackHeapBarrier|)) (.cse12 (= |c_ULTIMATE.start_main_~j~0#1| 0)) (.cse5 (<= 2 |c_ULTIMATE.start_main_~#head~1#1.base|)) (.cse7 (= 5 |c_ULTIMATE.start_main_~max~0#1|))) (or (and .cse0 (exists ((|v_old(#valid)_AFTER_CALL_22| (Array Int Int)) (|v_old(#length)_AFTER_CALL_22| (Array Int Int)) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_22| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_AFTER_CALL_22| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_22| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~i~0#1_94| Int)) (let ((.cse8 (and .cse2 .cse3 .cse4 .cse12 .cse5 (<= 4 |v_ULTIMATE.start_main_~i~0#1_94|) .cse7)) (.cse6 (= |v_ULTIMATE.start_main_~i~0#1_94| 3))) (and (<= .cse1 |v_ULTIMATE.start_main_~i~0#1_94|) (or (and .cse2 .cse3 .cse4 .cse5 .cse6 .cse7) .cse8) (or .cse8 (let ((.cse9 (select |v_old(#memory_int)_AFTER_CALL_22| 1))) (and .cse2 (= (select .cse9 1) 0) .cse3 .cse10 (= (select .cse9 0) 48) (exists ((|v_#length_116| (Array Int Int))) (and (= |v_old(#length)_AFTER_CALL_22| (store |v_#length_116| |c_ULTIMATE.start_main_~#head~1#1.base| 4)) (= 29 (select |v_#length_116| 2)) (= 2 (select |v_#length_116| 1)))) .cse4 .cse11 (= (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_22| |c_ULTIMATE.start_main_~#head~1#1.base|) 0) 0) .cse6 (exists ((|v_#valid_138| (Array Int Int))) (and (= |v_old(#valid)_AFTER_CALL_22| (store |v_#valid_138| |c_ULTIMATE.start_main_~#head~1#1.base| 1)) (= (select |v_#valid_138| 1) 1) (= (select |v_#valid_138| 2) 1) (= (select |v_#valid_138| 0) 0) (= (select |v_#valid_138| |c_ULTIMATE.start_main_~#head~1#1.base|) 0))) (= (select (select |v_old(#memory_$Pointer$.offset)_AFTER_CALL_22| |c_ULTIMATE.start_main_~#head~1#1.base|) 0) 0) .cse7))))))) (and .cse0 (exists ((|v_old(#memory_$Pointer$.base)_AFTER_CALL_21| (Array Int (Array Int Int))) (|v_old(#valid)_AFTER_CALL_21| (Array Int Int)) (|v_old(#length)_AFTER_CALL_21| (Array Int Int)) (|v_old(#memory_$Pointer$.offset)_AFTER_CALL_21| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~i~0#1_94| Int) (|v_old(#memory_int)_AFTER_CALL_21| (Array Int (Array Int Int)))) (let ((.cse14 (and .cse2 .cse3 .cse4 .cse12 .cse5 (<= 4 |v_ULTIMATE.start_main_~i~0#1_94|) .cse7)) (.cse13 (= |v_ULTIMATE.start_main_~i~0#1_94| 3))) (and (<= .cse1 |v_ULTIMATE.start_main_~i~0#1_94|) (or (and .cse2 .cse3 .cse4 .cse5 .cse13 .cse7) .cse14) (or .cse14 (let ((.cse15 (select |v_old(#memory_int)_AFTER_CALL_21| 1))) (and .cse2 .cse3 (exists ((|v_#valid_138| (Array Int Int))) (and (= (select |v_#valid_138| 1) 1) (= |v_old(#valid)_AFTER_CALL_21| (store |v_#valid_138| |c_ULTIMATE.start_main_~#head~1#1.base| 1)) (= (select |v_#valid_138| 2) 1) (= (select |v_#valid_138| 0) 0) (= (select |v_#valid_138| |c_ULTIMATE.start_main_~#head~1#1.base|) 0))) (= (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_21| |c_ULTIMATE.start_main_~#head~1#1.base|) 0) 0) .cse10 .cse4 .cse11 (= 48 (select .cse15 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_AFTER_CALL_21| |c_ULTIMATE.start_main_~#head~1#1.base|) 0) 0) (exists ((|v_#length_116| (Array Int Int))) (and (= 29 (select |v_#length_116| 2)) (= |v_old(#length)_AFTER_CALL_21| (store |v_#length_116| |c_ULTIMATE.start_main_~#head~1#1.base| 4)) (= 2 (select |v_#length_116| 1)))) (= (select .cse15 1) 0) .cse13 .cse7))))))))) is different from true [2024-11-13 23:34:46,955 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3707#true' at error location [2024-11-13 23:34:46,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:34:46,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:34:46,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2024-11-13 23:34:46,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030611319] [2024-11-13 23:34:46,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:34:46,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-13 23:34:46,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:34:46,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-13 23:34:46,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=2126, Unknown=11, NotChecked=92, Total=2352 [2024-11-13 23:34:46,957 INFO L87 Difference]: Start difference. First operand 117 states and 155 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 23 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-13 23:34:51,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:34:51,547 INFO L93 Difference]: Finished difference Result 277 states and 414 transitions. [2024-11-13 23:34:51,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-13 23:34:51,548 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 23 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2024-11-13 23:34:51,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:34:51,551 INFO L225 Difference]: With dead ends: 277 [2024-11-13 23:34:51,551 INFO L226 Difference]: Without dead ends: 252 [2024-11-13 23:34:51,553 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=289, Invalid=4257, Unknown=14, NotChecked=132, Total=4692 [2024-11-13 23:34:51,553 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 148 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-13 23:34:51,553 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 628 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-13 23:34:51,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-11-13 23:34:51,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 130. [2024-11-13 23:34:51,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 119 states have (on average 1.3109243697478992) internal successors, (156), 120 states have internal predecessors, (156), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2024-11-13 23:34:51,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 174 transitions. [2024-11-13 23:34:51,612 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 174 transitions. Word has length 41 [2024-11-13 23:34:51,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:34:51,612 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 174 transitions. [2024-11-13 23:34:51,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 23 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-13 23:34:51,612 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 174 transitions. [2024-11-13 23:34:51,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-13 23:34:51,615 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:34:51,615 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:34:51,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 23:34:51,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 23:34:51,819 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:34:51,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:34:51,819 INFO L85 PathProgramCache]: Analyzing trace with hash -354465652, now seen corresponding path program 2 times [2024-11-13 23:34:51,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:34:51,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122780507] [2024-11-13 23:34:51,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:34:51,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:34:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:34:55,048 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 23:34:55,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:34:55,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122780507] [2024-11-13 23:34:55,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122780507] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:34:55,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878692731] [2024-11-13 23:34:55,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:34:55,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:34:55,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:34:55,052 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:34:55,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c35aa5d-07bf-4288-bf5e-e3509680b90f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 23:34:55,389 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 23:34:55,390 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:34:55,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-13 23:34:55,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:34:55,556 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 23:34:55,725 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-13 23:34:55,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-13 23:34:55,977 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-13 23:34:55,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-13 23:34:56,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2024-11-13 23:34:56,407 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-13 23:34:56,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-13 23:34:56,669 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 [2024-11-13 23:34:56,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2024-11-13 23:34:56,908 INFO L349 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2024-11-13 23:34:56,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 49 [2024-11-13 23:34:56,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2024-11-13 23:34:57,372 INFO L349 Elim1Store]: treesize reduction 164, result has 37.2 percent of original size [2024-11-13 23:34:57,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 146 treesize of output 145 [2024-11-13 23:34:57,447 INFO L349 Elim1Store]: treesize reduction 96, result has 23.8 percent of original size [2024-11-13 23:34:57,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 46 [2024-11-13 23:34:58,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:34:58,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:34:58,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 13 [2024-11-13 23:34:58,934 INFO L349 Elim1Store]: treesize reduction 40, result has 18.4 percent of original size [2024-11-13 23:34:58,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 161 treesize of output 58 [2024-11-13 23:34:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 23:34:58,942 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:35:00,022 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:35:00,023 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:35:00,030 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:35:00,056 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:35:00,057 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:35:00,060 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:35:00,560 INFO L349 Elim1Store]: treesize reduction 4987, result has 1.5 percent of original size [2024-11-13 23:35:00,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 4 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 31 case distinctions, treesize of input 1552405 treesize of output 1388391 [2024-11-13 23:35:02,208 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:35:02,221 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:35:02,239 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:35:02,239 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:35:02,242 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:35:02,252 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:35:02,266 INFO L349 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2024-11-13 23:35:02,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 40 [2024-11-13 23:37:14,324 WARN L286 SmtUtils]: Spent 2.18m on a formula simplification. DAG size of input: 1523 DAG size of output: 905 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-13 23:37:14,325 INFO L349 Elim1Store]: treesize reduction 47528, result has 43.2 percent of original size [2024-11-13 23:37:14,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 31 select indices, 31 select index equivalence classes, 3 disjoint index pairs (out of 465 index pairs), introduced 38 new quantified variables, introduced 465 case distinctions, treesize of input 93500086031 treesize of output 85441407026