./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905811a2-545a-4a3d-84a4-a7b0225caf80/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905811a2-545a-4a3d-84a4-a7b0225caf80/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905811a2-545a-4a3d-84a4-a7b0225caf80/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905811a2-545a-4a3d-84a4-a7b0225caf80/bin/utaipan-verify-NcY6lQBIFX/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905811a2-545a-4a3d-84a4-a7b0225caf80/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905811a2-545a-4a3d-84a4-a7b0225caf80/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:13:20,898 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:13:20,970 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905811a2-545a-4a3d-84a4-a7b0225caf80/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2023-11-12 00:13:20,976 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:13:20,977 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:13:21,007 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:13:21,008 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:13:21,008 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:13:21,009 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:13:21,010 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:13:21,011 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:13:21,011 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:13:21,012 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:13:21,012 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:13:21,013 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:13:21,014 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:13:21,014 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:13:21,015 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:13:21,015 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:13:21,016 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:13:21,016 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:13:21,018 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:13:21,019 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 00:13:21,020 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 00:13:21,020 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:13:21,021 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:13:21,021 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:13:21,022 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:13:21,022 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:13:21,022 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:13:21,023 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:13:21,024 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 00:13:21,024 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 00:13:21,025 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:13:21,025 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:13:21,026 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 00:13:21,026 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 00:13:21,027 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:13:21,027 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:13:21,028 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:13:21,028 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:13:21,030 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:13:21,030 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:13:21,031 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:13:21,031 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:13:21,031 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:13:21,032 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:13:21,032 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:13:21,032 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:13:21,033 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905811a2-545a-4a3d-84a4-a7b0225caf80/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905811a2-545a-4a3d-84a4-a7b0225caf80/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f [2023-11-12 00:13:21,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:13:21,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:13:21,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:13:21,354 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:13:21,354 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:13:21,355 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905811a2-545a-4a3d-84a4-a7b0225caf80/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2023-11-12 00:13:24,408 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:13:24,669 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:13:24,670 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905811a2-545a-4a3d-84a4-a7b0225caf80/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2023-11-12 00:13:24,687 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905811a2-545a-4a3d-84a4-a7b0225caf80/bin/utaipan-verify-NcY6lQBIFX/data/4324bdcc4/25e7ea4935924908b51e21c34eead55b/FLAG8e318eda9 [2023-11-12 00:13:24,704 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905811a2-545a-4a3d-84a4-a7b0225caf80/bin/utaipan-verify-NcY6lQBIFX/data/4324bdcc4/25e7ea4935924908b51e21c34eead55b [2023-11-12 00:13:24,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:13:24,715 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:13:24,719 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:13:24,719 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:13:24,724 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:13:24,725 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:13:24" (1/1) ... [2023-11-12 00:13:24,726 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c89a1c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:24, skipping insertion in model container [2023-11-12 00:13:24,727 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:13:24" (1/1) ... [2023-11-12 00:13:24,799 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:13:25,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:13:25,131 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:13:25,210 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:13:25,260 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:13:25,261 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:25 WrapperNode [2023-11-12 00:13:25,261 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:13:25,262 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:13:25,263 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:13:25,263 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:13:25,271 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:25" (1/1) ... [2023-11-12 00:13:25,304 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:25" (1/1) ... [2023-11-12 00:13:25,347 INFO L138 Inliner]: procedures = 129, calls = 80, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 212 [2023-11-12 00:13:25,348 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:13:25,348 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:13:25,349 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:13:25,349 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:13:25,359 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:25" (1/1) ... [2023-11-12 00:13:25,360 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:25" (1/1) ... [2023-11-12 00:13:25,381 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:25" (1/1) ... [2023-11-12 00:13:25,385 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:25" (1/1) ... [2023-11-12 00:13:25,401 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:25" (1/1) ... [2023-11-12 00:13:25,407 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:25" (1/1) ... [2023-11-12 00:13:25,415 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:25" (1/1) ... [2023-11-12 00:13:25,418 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:25" (1/1) ... [2023-11-12 00:13:25,422 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:13:25,423 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:13:25,423 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:13:25,424 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:13:25,424 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:25" (1/1) ... [2023-11-12 00:13:25,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:13:25,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905811a2-545a-4a3d-84a4-a7b0225caf80/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:25,456 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905811a2-545a-4a3d-84a4-a7b0225caf80/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:13:25,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905811a2-545a-4a3d-84a4-a7b0225caf80/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:13:25,494 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-11-12 00:13:25,495 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-11-12 00:13:25,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:13:25,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:13:25,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:13:25,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:13:25,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:13:25,496 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2023-11-12 00:13:25,497 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2023-11-12 00:13:25,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:13:25,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:13:25,497 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2023-11-12 00:13:25,497 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2023-11-12 00:13:25,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:13:25,498 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2023-11-12 00:13:25,498 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2023-11-12 00:13:25,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:13:25,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:13:25,644 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:13:25,647 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:13:26,118 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:13:26,201 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:13:26,201 INFO L302 CfgBuilder]: Removed 33 assume(true) statements. [2023-11-12 00:13:26,204 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:13:26 BoogieIcfgContainer [2023-11-12 00:13:26,205 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:13:26,207 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:13:26,208 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:13:26,211 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:13:26,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:13:24" (1/3) ... [2023-11-12 00:13:26,212 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67615662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:13:26, skipping insertion in model container [2023-11-12 00:13:26,212 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:25" (2/3) ... [2023-11-12 00:13:26,213 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67615662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:13:26, skipping insertion in model container [2023-11-12 00:13:26,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:13:26" (3/3) ... [2023-11-12 00:13:26,214 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2023-11-12 00:13:26,234 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:13:26,234 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 00:13:26,289 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:13:26,296 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@113ee723, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:13:26,296 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 00:13:26,301 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 61 states have (on average 1.6885245901639345) internal successors, (103), 70 states have internal predecessors, (103), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-12 00:13:26,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 00:13:26,311 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:26,311 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:13:26,312 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-12 00:13:26,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:26,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1095243176, now seen corresponding path program 1 times [2023-11-12 00:13:26,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:26,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397248089] [2023-11-12 00:13:26,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:26,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:13:26,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:26,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397248089] [2023-11-12 00:13:26,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397248089] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:13:26,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:13:26,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:13:26,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438630177] [2023-11-12 00:13:26,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:13:26,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:13:26,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:26,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:13:26,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:13:26,683 INFO L87 Difference]: Start difference. First operand has 83 states, 61 states have (on average 1.6885245901639345) internal successors, (103), 70 states have internal predecessors, (103), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:13:26,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:26,758 INFO L93 Difference]: Finished difference Result 81 states and 102 transitions. [2023-11-12 00:13:26,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:13:26,761 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-12 00:13:26,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:26,771 INFO L225 Difference]: With dead ends: 81 [2023-11-12 00:13:26,771 INFO L226 Difference]: Without dead ends: 80 [2023-11-12 00:13:26,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:13:26,780 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:26,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:13:26,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-12 00:13:26,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-11-12 00:13:26,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 58 states have (on average 1.293103448275862) internal successors, (75), 67 states have internal predecessors, (75), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-12 00:13:26,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2023-11-12 00:13:26,841 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 15 [2023-11-12 00:13:26,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:26,841 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2023-11-12 00:13:26,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:13:26,842 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2023-11-12 00:13:26,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 00:13:26,845 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:26,845 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:13:26,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:13:26,847 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-12 00:13:26,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:26,848 INFO L85 PathProgramCache]: Analyzing trace with hash 255524517, now seen corresponding path program 1 times [2023-11-12 00:13:26,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:26,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38096561] [2023-11-12 00:13:26,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:26,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:13:28,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:28,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38096561] [2023-11-12 00:13:28,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38096561] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:13:28,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687127846] [2023-11-12 00:13:28,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:28,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:28,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905811a2-545a-4a3d-84a4-a7b0225caf80/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:28,939 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905811a2-545a-4a3d-84a4-a7b0225caf80/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:28,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905811a2-545a-4a3d-84a4-a7b0225caf80/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:13:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:29,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-12 00:13:29,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:29,407 INFO L351 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 42 treesize of output 38 [2023-11-12 00:13:29,509 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 40 [2023-11-12 00:13:29,523 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 64 treesize of output 29 [2023-11-12 00:13:29,527 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-11-12 00:13:29,596 INFO L322 Elim1Store]: treesize reduction 72, result has 32.7 percent of original size [2023-11-12 00:13:29,597 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2023-11-12 00:13:29,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:13:29,700 INFO L322 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2023-11-12 00:13:29,701 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 1 [2023-11-12 00:13:29,891 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2023-11-12 00:13:30,044 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-12 00:13:30,045 INFO L351 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 24 treesize of output 19 [2023-11-12 00:13:30,124 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-12 00:13:30,125 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 8 [2023-11-12 00:13:30,196 WARN L876 $PredicateComparison]: unable to prove that (or (and (<= (+ |c_chain_node_#in~ppnode#1.base| 1) |c_#StackHeapBarrier|) (let ((.cse0 (select |c_old(#memory_$Pointer$.base)| |c_chain_node_#in~ppnode#1.base|))) (or (exists ((|chain_node_alloc_node_#res#1.offset| Int)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_chain_node_#in~ppnode#1.base| (store (store (store .cse0 |chain_node_alloc_node_#res#1.offset| 0) (+ 4 |chain_node_alloc_node_#res#1.offset|) 0) |c_chain_node_#in~ppnode#1.offset| |c_chain_node_#in~ppnode#1.base|)))) (exists ((|chain_node_alloc_node_#res#1.offset| Int) (|chain_node_~node~0#1.offset| Int)) (and (not (= |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.offset|)) (= (store |c_old(#memory_$Pointer$.base)| |c_chain_node_#in~ppnode#1.base| (store (store (store (store .cse0 |chain_node_alloc_node_#res#1.offset| 0) (+ 4 |chain_node_alloc_node_#res#1.offset|) 0) |chain_node_~node~0#1.offset| (select (select |c_#memory_$Pointer$.base| |c_chain_node_#in~ppnode#1.base|) |chain_node_~node~0#1.offset|)) |c_chain_node_#in~ppnode#1.offset| |c_chain_node_#in~ppnode#1.base|)) |c_#memory_$Pointer$.base|))))) (not (= |c_chain_node_#in~ppnode#1.base| 0))) (exists ((v_ArrVal_163 Int) (|chain_node_~node~0#1.base| Int) (|chain_node_alloc_node_#res#1.offset| Int) (|chain_node_~node~0#1.offset| Int)) (and (not (= |chain_node_~node~0#1.base| |c_chain_node_#in~ppnode#1.base|)) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$.base| |chain_node_~node~0#1.base|)) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| (store (store (store (select |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base|) |chain_node_alloc_node_#res#1.offset| 0) (+ 4 |chain_node_alloc_node_#res#1.offset|) 0) |chain_node_~node~0#1.offset| v_ArrVal_163)) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|))) (<= (+ |chain_node_~node~0#1.base| 1) |c_#StackHeapBarrier|) (not (= |chain_node_~node~0#1.base| 0))))) is different from true [2023-11-12 00:13:30,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:13:30,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:13:30,246 INFO L322 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2023-11-12 00:13:30,247 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 63 [2023-11-12 00:13:30,298 INFO L322 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2023-11-12 00:13:30,298 INFO L351 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 2 case distinctions, treesize of input 16 treesize of output 23 [2023-11-12 00:13:30,949 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:13:30,949 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 831 treesize of output 715 [2023-11-12 00:13:30,974 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 134 [2023-11-12 00:13:30,985 INFO L351 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 126 treesize of output 122 [2023-11-12 00:13:30,995 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 121 [2023-11-12 00:13:31,008 INFO L351 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 113 treesize of output 111 [2023-11-12 00:13:31,095 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-12 00:13:31,157 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-12 00:13:31,206 INFO L351 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 21 treesize of output 15 [2023-11-12 00:13:31,236 INFO L351 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 12 treesize of output 8 [2023-11-12 00:13:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-12 00:13:31,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:13:31,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687127846] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:13:31,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1005176568] [2023-11-12 00:13:31,502 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-12 00:13:31,502 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:13:31,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:13:31,513 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:13:31,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:13:38,931 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 268 for LOIs [2023-11-12 00:13:39,340 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 302 for LOIs [2023-11-12 00:13:41,436 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 292 for LOIs [2023-11-12 00:13:43,845 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:14:13,471 WARN L293 SmtUtils]: Spent 10.50s on a formula simplification. DAG size of input: 345 DAG size of output: 344 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)