./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/bin/utaipan-verify-DbMuA5NWw2 --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 e4cb0386e6b22b9d67dd4f4c4c33eb167dcf1836f99794e4424c5e73e6fc14d4 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:38:23,217 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:38:23,308 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:38:23,314 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:38:23,315 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:38:23,364 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:38:23,365 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:38:23,366 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:38:23,367 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:38:23,369 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:38:23,369 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:38:23,369 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:38:23,370 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:38:23,370 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:38:23,372 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:38:23,373 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:38:23,373 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:38:23,376 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:38:23,376 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:38:23,377 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:38:23,377 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:38:23,378 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:38:23,378 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:38:23,379 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:38:23,379 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:38:23,379 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:38:23,380 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:38:23,380 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:38:23,380 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:38:23,380 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:38:23,381 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:38:23,381 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:38:23,381 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:38:23,384 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:38:23,384 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:38:23,384 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:38:23,385 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:38:23,385 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:38:23,385 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:38:23,386 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:38:23,386 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:38:23,386 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:38:23,387 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:38:23,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:38:23,388 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:38:23,388 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:38:23,388 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:38:23,388 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_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4cb0386e6b22b9d67dd4f4c4c33eb167dcf1836f99794e4424c5e73e6fc14d4 [2024-11-02 12:38:23,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:38:23,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:38:23,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:38:23,767 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:38:23,769 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:38:23,771 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i Unable to find full path for "g++" [2024-11-02 12:38:25,904 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:38:26,171 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:38:26,171 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i [2024-11-02 12:38:26,194 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/bin/utaipan-verify-DbMuA5NWw2/data/58a729dd4/348a653545d4400fafb5f2d4821346cb/FLAG7519f9a0d [2024-11-02 12:38:26,215 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/bin/utaipan-verify-DbMuA5NWw2/data/58a729dd4/348a653545d4400fafb5f2d4821346cb [2024-11-02 12:38:26,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:38:26,219 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:38:26,221 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:38:26,221 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:38:26,229 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:38:26,230 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:38:26" (1/1) ... [2024-11-02 12:38:26,231 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c2127d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:26, skipping insertion in model container [2024-11-02 12:38:26,232 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:38:26" (1/1) ... [2024-11-02 12:38:26,282 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:38:26,722 WARN L251 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_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i[24076,24089] [2024-11-02 12:38:26,730 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:38:26,746 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:38:26,830 WARN L251 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_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i[24076,24089] [2024-11-02 12:38:26,835 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:38:26,878 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:38:26,879 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:26 WrapperNode [2024-11-02 12:38:26,879 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:38:26,880 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:38:26,880 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:38:26,880 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:38:26,889 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:26" (1/1) ... [2024-11-02 12:38:26,908 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:26" (1/1) ... [2024-11-02 12:38:26,936 INFO L138 Inliner]: procedures = 127, calls = 30, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 105 [2024-11-02 12:38:26,937 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:38:26,938 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:38:26,939 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:38:26,939 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:38:26,949 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:26" (1/1) ... [2024-11-02 12:38:26,950 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:26" (1/1) ... [2024-11-02 12:38:26,958 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:26" (1/1) ... [2024-11-02 12:38:26,959 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:26" (1/1) ... [2024-11-02 12:38:26,970 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:26" (1/1) ... [2024-11-02 12:38:26,979 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:26" (1/1) ... [2024-11-02 12:38:26,985 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:26" (1/1) ... [2024-11-02 12:38:26,989 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:26" (1/1) ... [2024-11-02 12:38:26,996 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:38:26,997 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:38:26,997 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:38:26,997 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:38:26,998 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:26" (1/1) ... [2024-11-02 12:38:27,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:38:27,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:38:27,030 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:38:27,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:38:27,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:38:27,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:38:27,066 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-02 12:38:27,066 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-02 12:38:27,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 12:38:27,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:38:27,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:38:27,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-02 12:38:27,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-02 12:38:27,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:38:27,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-02 12:38:27,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:38:27,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:38:27,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:38:27,222 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:38:27,225 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:38:27,530 INFO L? ?]: Removed 39 outVars from TransFormulas that were not future-live. [2024-11-02 12:38:27,530 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:38:27,628 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:38:27,628 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-02 12:38:27,630 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:38:27 BoogieIcfgContainer [2024-11-02 12:38:27,630 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:38:27,633 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:38:27,633 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:38:27,639 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:38:27,639 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:38:26" (1/3) ... [2024-11-02 12:38:27,640 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bcd22d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:38:27, skipping insertion in model container [2024-11-02 12:38:27,640 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:26" (2/3) ... [2024-11-02 12:38:27,641 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bcd22d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:38:27, skipping insertion in model container [2024-11-02 12:38:27,641 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:38:27" (3/3) ... [2024-11-02 12:38:27,663 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_equal.i [2024-11-02 12:38:27,696 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:38:27,696 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:38:27,767 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:38:27,775 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;@3e094ad4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:38:27,776 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:38:27,781 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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) [2024-11-02 12:38:27,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-02 12:38:27,790 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:27,790 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:38:27,791 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:38:27,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:27,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1742641309, now seen corresponding path program 1 times [2024-11-02 12:38:27,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:27,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654755014] [2024-11-02 12:38:27,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:27,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:38:28,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:28,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654755014] [2024-11-02 12:38:28,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654755014] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:38:28,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:38:28,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:38:28,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998043851] [2024-11-02 12:38:28,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:38:28,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:38:28,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:38:28,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:38:28,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:38:28,347 INFO L87 Difference]: Start difference. First operand has 18 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2024-11-02 12:38:28,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:38:28,409 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2024-11-02 12:38:28,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:38:28,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 10 [2024-11-02 12:38:28,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:38:28,420 INFO L225 Difference]: With dead ends: 35 [2024-11-02 12:38:28,421 INFO L226 Difference]: Without dead ends: 17 [2024-11-02 12:38:28,424 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 [2024-11-02 12:38:28,431 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:38:28,432 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 28 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:38:28,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-02 12:38:28,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2024-11-02 12:38:28,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2024-11-02 12:38:28,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2024-11-02 12:38:28,483 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2024-11-02 12:38:28,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:38:28,484 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2024-11-02 12:38:28,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2024-11-02 12:38:28,485 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2024-11-02 12:38:28,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-02 12:38:28,487 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:28,487 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:38:28,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:38:28,490 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:38:28,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:28,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1529906914, now seen corresponding path program 1 times [2024-11-02 12:38:28,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:28,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89787016] [2024-11-02 12:38:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:28,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:38:28,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:28,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89787016] [2024-11-02 12:38:28,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89787016] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:38:28,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691739760] [2024-11-02 12:38:28,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:28,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:38:28,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:38:28,840 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:38:28,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:38:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:29,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 12:38:29,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:38:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:38:29,168 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:38:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:38:29,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691739760] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:38:29,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1555751578] [2024-11-02 12:38:29,269 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-02 12:38:29,269 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:38:29,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:38:29,286 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:38:29,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:38:31,808 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 129 for LOIs [2024-11-02 12:38:32,038 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:38:42,734 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '192#(and (not (= (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0)) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 1)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0)) (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) 4)) |ULTIMATE.start_main_~temp~2#1.offset|) (= |ULTIMATE.start_main_~count~0#1| 0) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0)) (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) 4)) |ULTIMATE.start_main_~temp~2#1.base|) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_#memory_$Pointer$.base_52| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_52| (Array Int (Array Int Int))) (|v_#memory_int_65| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_prepend_~head#1.base_14| Int) (|v_#memory_int_27| (Array Int (Array Int Int)))) (and (= |v_#memory_int_27| (store |v_#memory_int_65| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0) (store (select |v_#memory_int_65| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) 4 (select (select |v_#memory_int_27| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) 4)))) (= |#memory_int| (store |v_#memory_int_27| |v_ULTIMATE.start_sll_prepend_~head#1.base_14| (store (select |v_#memory_int_27| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0 (select (select |#memory_int| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)))) (= (store (store |v_#memory_$Pointer$.base_52| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0) (store (select |v_#memory_$Pointer$.base_52| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) 4 (select (select |v_#memory_$Pointer$.base_52| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0))) |v_ULTIMATE.start_sll_prepend_~head#1.base_14| (store (select (store |v_#memory_$Pointer$.base_52| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0) (store (select |v_#memory_$Pointer$.base_52| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) 4 (select (select |v_#memory_$Pointer$.base_52| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0))) |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0))) |#memory_$Pointer$.base|) (or (and (= |v_ULTIMATE.start_sll_prepend_~head#1.base_14| |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_#length_23| (Array Int Int))) (= |#length| (store |v_#length_23| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0) 8))) (exists ((|v_#memory_int_39| (Array Int (Array Int Int))) (|v_#memory_int_61| (Array Int (Array Int Int)))) (and (= |v_#memory_int_39| (store |v_#memory_int_61| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0) (store (select |v_#memory_int_61| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) 4 (select (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) 4)))) (= |v_#memory_int_65| (store |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0) (store (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) 0 1))))) (exists ((|v_#memory_$Pointer$.base_48| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_48| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0) (store (store (select |v_#memory_$Pointer$.base_48| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) 4 0) 0 (select (select |v_#memory_$Pointer$.base_52| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) 0))) |v_#memory_$Pointer$.base_52|)) (exists ((|v_#memory_$Pointer$.offset_48| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.offset_48| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0) (store (store (select |v_#memory_$Pointer$.offset_48| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) 4 0) 0 (select (select |v_#memory_$Pointer$.offset_52| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) 0))) |v_#memory_$Pointer$.offset_52|)) (exists ((|v_#valid_33| (Array Int Int))) (and (= (store |v_#valid_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0) 1) |#valid|) (= (select |v_#valid_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) 0))) (<= (+ 1 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.offset_51| (Array Int (Array Int Int))) (|v_#memory_int_64| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_10| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_51| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_10| (Array Int (Array Int Int)))) (and (= |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| (store |v_#memory_$Pointer$.base_51| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select |v_#memory_$Pointer$.base_51| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)))) (= (select (select |v_#memory_$Pointer$.offset_51| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= |v_old(#memory_int)_AFTER_CALL_10| (store |v_#memory_int_64| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select |v_#memory_int_64| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 (select (select |v_old(#memory_int)_AFTER_CALL_10| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4))))))) (and (= |v_ULTIMATE.start_sll_prepend_~head#1.base_14| |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_#length_23| (Array Int Int))) (= |#length| (store |v_#length_23| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0) 8))) (exists ((|v_#memory_int_39| (Array Int (Array Int Int))) (|v_#memory_int_61| (Array Int (Array Int Int)))) (and (= |v_#memory_int_39| (store |v_#memory_int_61| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0) (store (select |v_#memory_int_61| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) 4 (select (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) 4)))) (= |v_#memory_int_65| (store |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0) (store (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) 0 1))))) (exists ((|v_#memory_$Pointer$.base_48| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_48| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0) (store (store (select |v_#memory_$Pointer$.base_48| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) 4 0) 0 (select (select |v_#memory_$Pointer$.base_52| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) 0))) |v_#memory_$Pointer$.base_52|)) (exists ((|v_#memory_$Pointer$.offset_48| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.offset_48| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0) (store (store (select |v_#memory_$Pointer$.offset_48| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) 4 0) 0 (select (select |v_#memory_$Pointer$.offset_52| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) 0))) |v_#memory_$Pointer$.offset_52|)) (exists ((|v_#valid_33| (Array Int Int))) (and (= (store |v_#valid_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0) 1) |#valid|) (= (select |v_#valid_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) 0))) (exists ((|v_#memory_$Pointer$.offset_51| (Array Int (Array Int Int))) (|v_#memory_int_64| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_51| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_9| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_9| (Array Int (Array Int Int)))) (and (= |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| (store |v_#memory_$Pointer$.base_51| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select |v_#memory_$Pointer$.base_51| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)))) (= |v_old(#memory_int)_AFTER_CALL_9| (store |v_#memory_int_64| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select |v_#memory_int_64| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 (select (select |v_old(#memory_int)_AFTER_CALL_9| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)))) (= (select (select |v_#memory_$Pointer$.offset_51| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0))) (<= (+ 1 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) |#StackHeapBarrier|))) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_52| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0) (store (select |v_#memory_$Pointer$.offset_52| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) 4 (select (select |v_#memory_$Pointer$.offset_52| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0))) |v_ULTIMATE.start_sll_prepend_~head#1.base_14| (store (select (store |v_#memory_$Pointer$.offset_52| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0) (store (select |v_#memory_$Pointer$.offset_52| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0)) 4 (select (select |v_#memory_$Pointer$.offset_52| |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0))) |v_ULTIMATE.start_sll_prepend_~head#1.base_14|) 0 0))))))' at error location [2024-11-02 12:38:42,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:38:42,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:38:42,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-11-02 12:38:42,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885703835] [2024-11-02 12:38:42,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:38:42,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:38:42,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:38:42,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:38:42,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=205, Unknown=1, NotChecked=0, Total=240 [2024-11-02 12:38:42,740 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-02 12:38:42,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:38:42,853 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2024-11-02 12:38:42,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:38:42,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 16 [2024-11-02 12:38:42,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:38:42,855 INFO L225 Difference]: With dead ends: 28 [2024-11-02 12:38:42,855 INFO L226 Difference]: Without dead ends: 18 [2024-11-02 12:38:42,856 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=34, Invalid=205, Unknown=1, NotChecked=0, Total=240 [2024-11-02 12:38:42,860 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:38:42,861 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 37 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:38:42,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-02 12:38:42,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-02 12:38:42,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:38:42,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-11-02 12:38:42,870 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 16 [2024-11-02 12:38:42,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:38:42,872 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-11-02 12:38:42,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-02 12:38:42,873 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-11-02 12:38:42,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-02 12:38:42,874 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:42,875 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:38:42,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:38:43,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:38:43,076 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:38:43,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:43,076 INFO L85 PathProgramCache]: Analyzing trace with hash 451276135, now seen corresponding path program 2 times [2024-11-02 12:38:43,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:43,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448332853] [2024-11-02 12:38:43,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:43,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 12:38:44,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:44,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448332853] [2024-11-02 12:38:44,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448332853] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:38:44,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:38:44,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-02 12:38:44,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672875435] [2024-11-02 12:38:44,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:38:44,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 12:38:44,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:38:44,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 12:38:44,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:38:44,470 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:38:44,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:38:44,833 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2024-11-02 12:38:44,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 12:38:44,834 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2024-11-02 12:38:44,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:38:44,835 INFO L225 Difference]: With dead ends: 22 [2024-11-02 12:38:44,835 INFO L226 Difference]: Without dead ends: 20 [2024-11-02 12:38:44,835 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:38:44,837 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:38:44,837 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 36 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:38:44,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-02 12:38:44,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-02 12:38:44,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:38:44,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2024-11-02 12:38:44,843 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 22 [2024-11-02 12:38:44,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:38:44,844 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2024-11-02 12:38:44,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:38:44,844 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2024-11-02 12:38:44,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-02 12:38:44,845 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:44,845 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:38:44,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:38:44,846 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:38:44,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:44,846 INFO L85 PathProgramCache]: Analyzing trace with hash 451331160, now seen corresponding path program 1 times [2024-11-02 12:38:44,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:44,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438855987] [2024-11-02 12:38:44,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:44,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 12:38:45,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:45,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438855987] [2024-11-02 12:38:45,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438855987] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:38:45,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:38:45,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-02 12:38:45,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259939268] [2024-11-02 12:38:45,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:38:45,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:38:45,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:38:45,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:38:45,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:38:45,204 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:38:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:38:45,330 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2024-11-02 12:38:45,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:38:45,331 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2024-11-02 12:38:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:38:45,332 INFO L225 Difference]: With dead ends: 23 [2024-11-02 12:38:45,332 INFO L226 Difference]: Without dead ends: 20 [2024-11-02 12:38:45,332 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:38:45,333 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 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 [2024-11-02 12:38:45,334 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:38:45,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-02 12:38:45,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-02 12:38:45,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:38:45,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-11-02 12:38:45,343 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 22 [2024-11-02 12:38:45,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:38:45,344 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-11-02 12:38:45,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:38:45,344 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-11-02 12:38:45,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-02 12:38:45,345 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:45,346 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:38:45,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:38:45,346 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:38:45,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:45,348 INFO L85 PathProgramCache]: Analyzing trace with hash -115297310, now seen corresponding path program 1 times [2024-11-02 12:38:45,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:45,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752494239] [2024-11-02 12:38:45,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:45,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:38:48,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:48,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752494239] [2024-11-02 12:38:48,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752494239] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:38:48,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764601279] [2024-11-02 12:38:48,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:48,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:38:48,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:38:48,099 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:38:48,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06bda7c-a310-4f0a-ba78-07fd1cdf92ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:38:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:48,277 INFO L255 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-02 12:38:48,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:38:48,579 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 [2024-11-02 12:38:48,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-02 12:38:48,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-02 12:38:49,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-11-02 12:38:49,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-02 12:38:49,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-02 12:38:49,373 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 [2024-11-02 12:38:49,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 12:38:49,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-02 12:38:49,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 12:38:49,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2024-11-02 12:38:49,738 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-02 12:38:49,739 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 20 treesize of output 23 [2024-11-02 12:38:49,796 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-02 12:38:49,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-02 12:38:50,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 12:38:50,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 38 [2024-11-02 12:38:50,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 12:38:50,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 21 [2024-11-02 12:38:50,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 12:38:50,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 12:38:50,082 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 43 treesize of output 25 [2024-11-02 12:38:50,361 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2024-11-02 12:38:50,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 41 [2024-11-02 12:38:50,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 12:38:50,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-02 12:38:50,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:38:50,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:38:51,684 WARN L851 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_prepend_#t~ret7#1.offset| Int) (v_ArrVal_375 (Array Int Int)) (v_ArrVal_374 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse5 (+ |ULTIMATE.start_sll_prepend_#t~ret7#1.offset| 4))) (let ((.cse3 (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|) .cse5 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (store .cse6 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse6 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |ULTIMATE.start_sll_prepend_#t~ret7#1.offset|)))) (.cse0 (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|) .cse5 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (store .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|))))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (+ (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| v_ArrVal_374) |c_ULTIMATE.start_sll_prepend_~head#1.base| v_ArrVal_375) (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2))))))) is different from false [2024-11-02 12:38:52,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764601279] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:38:52,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1565285336] [2024-11-02 12:38:52,975 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-02 12:38:52,976 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:38:52,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:38:52,977 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:38:52,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:38:54,093 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 129 for LOIs [2024-11-02 12:38:54,263 INFO L180 IcfgInterpreter]: Interpretation finished