./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91 --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 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:05:08,239 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:05:08,365 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:05:08,374 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:05:08,375 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:05:08,416 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:05:08,417 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:05:08,417 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:05:08,418 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:05:08,423 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:05:08,424 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:05:08,425 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:05:08,425 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:05:08,427 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:05:08,427 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:05:08,428 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:05:08,429 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:05:08,429 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:05:08,430 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:05:08,430 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:05:08,431 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:05:08,431 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:05:08,433 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:05:08,433 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:05:08,434 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:05:08,434 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:05:08,435 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:05:08,435 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:05:08,436 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:05:08,436 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:05:08,437 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:05:08,438 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:05:08,438 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:05:08,438 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:05:08,438 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:05:08,439 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:05:08,439 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:05:08,439 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:05:08,440 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:05:08,440 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:05:08,440 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:05:08,441 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:05:08,441 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:05:08,441 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:05:08,442 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:05:08,442 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:05:08,442 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:05:08,442 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_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 [2023-11-25 00:05:08,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:05:08,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:05:08,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:05:08,770 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:05:08,771 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:05:08,772 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2023-11-25 00:05:11,950 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:05:12,288 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:05:12,288 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2023-11-25 00:05:12,303 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/data/af323004c/92f30635e245491b9eb673dfca09c53c/FLAG9a2438aa9 [2023-11-25 00:05:12,318 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/data/af323004c/92f30635e245491b9eb673dfca09c53c [2023-11-25 00:05:12,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:05:12,322 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:05:12,324 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:05:12,324 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:05:12,330 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:05:12,331 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:05:12" (1/1) ... [2023-11-25 00:05:12,332 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a4ae72c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:12, skipping insertion in model container [2023-11-25 00:05:12,332 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:05:12" (1/1) ... [2023-11-25 00:05:12,398 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:05:12,781 WARN L240 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_87f798a5-2a48-438a-9f40-d8f31dfce26a/sv-benchmarks/c/list-simple/sll2n_insert_equal.i[24301,24314] [2023-11-25 00:05:12,786 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:05:12,795 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:05:12,837 WARN L240 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_87f798a5-2a48-438a-9f40-d8f31dfce26a/sv-benchmarks/c/list-simple/sll2n_insert_equal.i[24301,24314] [2023-11-25 00:05:12,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:05:12,872 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:05:12,872 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:12 WrapperNode [2023-11-25 00:05:12,873 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:05:12,874 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:05:12,874 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:05:12,874 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:05:12,882 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:12" (1/1) ... [2023-11-25 00:05:12,896 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:12" (1/1) ... [2023-11-25 00:05:12,921 INFO L138 Inliner]: procedures = 127, calls = 32, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 121 [2023-11-25 00:05:12,922 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:05:12,923 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:05:12,923 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:05:12,923 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:05:12,933 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:12" (1/1) ... [2023-11-25 00:05:12,933 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:12" (1/1) ... [2023-11-25 00:05:12,937 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:12" (1/1) ... [2023-11-25 00:05:12,938 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:12" (1/1) ... [2023-11-25 00:05:12,945 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:12" (1/1) ... [2023-11-25 00:05:12,949 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:12" (1/1) ... [2023-11-25 00:05:12,951 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:12" (1/1) ... [2023-11-25 00:05:12,953 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:12" (1/1) ... [2023-11-25 00:05:12,957 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:05:12,958 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:05:12,958 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:05:12,958 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:05:12,959 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:12" (1/1) ... [2023-11-25 00:05:12,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:05:12,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:05:13,003 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:05:13,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:05:13,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:05:13,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:05:13,042 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-25 00:05:13,043 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-25 00:05:13,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-25 00:05:13,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:05:13,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-25 00:05:13,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-25 00:05:13,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-25 00:05:13,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:05:13,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-25 00:05:13,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:05:13,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:05:13,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:05:13,194 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:05:13,197 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:05:13,478 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:05:13,552 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:05:13,553 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-25 00:05:13,555 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:05:13 BoogieIcfgContainer [2023-11-25 00:05:13,555 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:05:13,558 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:05:13,558 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:05:13,562 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:05:13,563 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:05:12" (1/3) ... [2023-11-25 00:05:13,564 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4626f534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:05:13, skipping insertion in model container [2023-11-25 00:05:13,564 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:12" (2/3) ... [2023-11-25 00:05:13,564 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4626f534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:05:13, skipping insertion in model container [2023-11-25 00:05:13,564 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:05:13" (3/3) ... [2023-11-25 00:05:13,566 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_insert_equal.i [2023-11-25 00:05:13,597 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:05:13,597 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:05:13,644 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:05:13,652 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=true, 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;@b5a7a58, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:05:13,652 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:05:13,657 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 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) [2023-11-25 00:05:13,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-25 00:05:13,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:13,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:13,669 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:13,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:13,709 INFO L85 PathProgramCache]: Analyzing trace with hash 2008248792, now seen corresponding path program 1 times [2023-11-25 00:05:13,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:13,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009687968] [2023-11-25 00:05:13,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:13,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:05:14,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:14,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009687968] [2023-11-25 00:05:14,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009687968] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:05:14,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:05:14,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:05:14,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052099214] [2023-11-25 00:05:14,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:14,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:05:14,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:14,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:05:14,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:05:14,224 INFO L87 Difference]: Start difference. First operand has 19 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 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 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-25 00:05:14,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:14,309 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2023-11-25 00:05:14,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:05:14,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 11 [2023-11-25 00:05:14,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:14,320 INFO L225 Difference]: With dead ends: 37 [2023-11-25 00:05:14,320 INFO L226 Difference]: Without dead ends: 18 [2023-11-25 00:05:14,325 INFO L412 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 [2023-11-25 00:05:14,332 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:14,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 32 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:05:14,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-25 00:05:14,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2023-11-25 00:05:14,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 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) [2023-11-25 00:05:14,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-11-25 00:05:14,377 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 11 [2023-11-25 00:05:14,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:14,379 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-11-25 00:05:14,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-25 00:05:14,379 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-11-25 00:05:14,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-25 00:05:14,382 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:14,382 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:14,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:05:14,384 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:14,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:14,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1612553850, now seen corresponding path program 1 times [2023-11-25 00:05:14,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:14,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175225139] [2023-11-25 00:05:14,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:14,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:05:14,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:14,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175225139] [2023-11-25 00:05:14,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175225139] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:05:14,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995654760] [2023-11-25 00:05:14,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:14,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:14,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:05:14,591 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:05:14,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:05:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:14,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-25 00:05:14,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:05:14,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:05:14,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:05:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:05:14,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995654760] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:05:14,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [188297438] [2023-11-25 00:05:14,973 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-25 00:05:14,973 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:05:14,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:05:14,988 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:05:14,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:05:17,410 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 137 for LOIs [2023-11-25 00:05:17,717 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:05:22,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [188297438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:05:22,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:05:22,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [4, 4, 4] total 14 [2023-11-25 00:05:22,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350555695] [2023-11-25 00:05:22,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:22,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-25 00:05:22,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:22,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-25 00:05:22,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=151, Unknown=1, NotChecked=0, Total=182 [2023-11-25 00:05:22,317 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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) [2023-11-25 00:05:24,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:05:26,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:05:27,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:27,712 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2023-11-25 00:05:27,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-25 00:05:27,712 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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) Word has length 17 [2023-11-25 00:05:27,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:27,713 INFO L225 Difference]: With dead ends: 22 [2023-11-25 00:05:27,713 INFO L226 Difference]: Without dead ends: 17 [2023-11-25 00:05:27,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=30, Invalid=151, Unknown=1, NotChecked=0, Total=182 [2023-11-25 00:05:27,716 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:27,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 4 Unknown, 0 Unchecked, 5.4s Time] [2023-11-25 00:05:27,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-25 00:05:27,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-25 00:05:27,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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) [2023-11-25 00:05:27,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-11-25 00:05:27,727 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 17 [2023-11-25 00:05:27,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:27,727 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-11-25 00:05:27,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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) [2023-11-25 00:05:27,728 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-11-25 00:05:27,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-25 00:05:27,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:27,729 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:27,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-25 00:05:27,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:27,943 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:27,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:27,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1474735693, now seen corresponding path program 1 times [2023-11-25 00:05:27,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:27,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281755309] [2023-11-25 00:05:27,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:27,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:05:28,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:28,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281755309] [2023-11-25 00:05:28,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281755309] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:05:28,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797895050] [2023-11-25 00:05:28,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:28,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:28,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:05:28,083 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:05:28,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:05:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:28,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-25 00:05:28,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:05:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:05:28,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:05:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:05:28,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797895050] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:05:28,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1542914999] [2023-11-25 00:05:28,287 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-25 00:05:28,287 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:05:28,288 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:05:28,288 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:05:28,288 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:05:29,862 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 137 for LOIs [2023-11-25 00:05:30,128 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:05:36,632 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '372#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~ptr~0#1.base|) |ULTIMATE.start_main_~ptr~0#1.offset|) 1)) (exists ((|v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26| Int) (|v_#memory_int_95| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_27| Int) (|v_#memory_$Pointer$.base_88| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_insert_~head#1.base_21| Int) (|v_#memory_$Pointer$.offset_88| (Array Int (Array Int Int))) (|v_#memory_int_46| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_27| Int) (|v_#memory_$Pointer$.offset_48| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_48| (Array Int (Array Int Int)))) (and (<= 2 |v_ULTIMATE.start_sll_insert_~head#1.base_21|) (= |#memory_int| (store |v_#memory_int_46| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26| (store (select |v_#memory_int_46| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26|) 4 (select (select |#memory_int| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26|) 4)))) (or (and (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_27| 0) (= (store |v_#memory_$Pointer$.base_88| |v_ULTIMATE.start_sll_insert_~head#1.base_21| (store (select |v_#memory_$Pointer$.base_88| |v_ULTIMATE.start_sll_insert_~head#1.base_21|) 0 |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26|)) |v_#memory_$Pointer$.base_48|) (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_27| 0) (= (store |v_#memory_int_95| |v_ULTIMATE.start_sll_insert_~head#1.base_21| (store (select |v_#memory_int_95| |v_ULTIMATE.start_sll_insert_~head#1.base_21|) 0 (select (select |v_#memory_int_46| |v_ULTIMATE.start_sll_insert_~head#1.base_21|) 0))) |v_#memory_int_46|) (= (store |v_#memory_$Pointer$.offset_88| |v_ULTIMATE.start_sll_insert_~head#1.base_21| (store (select |v_#memory_$Pointer$.offset_88| |v_ULTIMATE.start_sll_insert_~head#1.base_21|) 0 0)) |v_#memory_$Pointer$.offset_48|)) (and (= (store |v_#memory_$Pointer$.base_88| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_27| (store (select |v_#memory_$Pointer$.base_88| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_27|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_27| 4) |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26|)) |v_#memory_$Pointer$.base_48|) (= (store |v_#memory_int_95| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_27| (store (select |v_#memory_int_95| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_27|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_27| 4) (select (select |v_#memory_int_46| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_27|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_27| 4)))) |v_#memory_int_46|) (= (store |v_#memory_$Pointer$.offset_88| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_27| (store (select |v_#memory_$Pointer$.offset_88| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_27|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_27| 4) 0)) |v_#memory_$Pointer$.offset_48|) (or (not (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_27| 0)) (not (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_27| 0))))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_48| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26| (store (select |v_#memory_$Pointer$.offset_48| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26|) 4 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26|) 4)))) (= (store |v_#memory_$Pointer$.base_48| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26| (store (select |v_#memory_$Pointer$.base_48| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26|) 4 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26|) 4))) |#memory_$Pointer$.base|))) (or (not (= |ULTIMATE.start_main_~ptr~0#1.base| 0)) (not (= |ULTIMATE.start_main_~ptr~0#1.offset| 0))) (= |ULTIMATE.start_main_~temp~2#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4))) (= |ULTIMATE.start_main_~count~0#1| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) |ULTIMATE.start_main_~temp~2#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_main_~ptr~0#1.base|) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2023-11-25 00:05:36,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:05:36,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:05:36,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-11-25 00:05:36,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981908435] [2023-11-25 00:05:36,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:05:36,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:05:36,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:36,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:05:36,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=232, Unknown=2, NotChecked=0, Total=272 [2023-11-25 00:05:36,643 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-11-25 00:05:36,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:36,703 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2023-11-25 00:05:36,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:05:36,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 18 [2023-11-25 00:05:36,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:36,704 INFO L225 Difference]: With dead ends: 32 [2023-11-25 00:05:36,705 INFO L226 Difference]: Without dead ends: 20 [2023-11-25 00:05:36,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=38, Invalid=232, Unknown=2, NotChecked=0, Total=272 [2023-11-25 00:05:36,706 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:36,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 23 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:05:36,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-25 00:05:36,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-25 00:05:36,717 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) [2023-11-25 00:05:36,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-11-25 00:05:36,718 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 18 [2023-11-25 00:05:36,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:36,719 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-11-25 00:05:36,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-11-25 00:05:36,719 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-11-25 00:05:36,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-25 00:05:36,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:36,721 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:36,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-25 00:05:36,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:36,927 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:36,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:36,928 INFO L85 PathProgramCache]: Analyzing trace with hash 334061279, now seen corresponding path program 2 times [2023-11-25 00:05:36,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:36,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646433103] [2023-11-25 00:05:36,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:36,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:39,805 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:05:39,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:39,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646433103] [2023-11-25 00:05:39,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646433103] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:05:39,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211724807] [2023-11-25 00:05:39,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:05:39,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:39,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:05:39,813 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:05:39,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:05:40,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-25 00:05:40,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:05:40,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 101 conjunts are in the unsatisfiable core [2023-11-25 00:05:40,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:05:40,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-25 00:05:40,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-25 00:05:40,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-11-25 00:05:40,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2023-11-25 00:05:40,796 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 [2023-11-25 00:05:40,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-25 00:05:40,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-25 00:05:40,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:05:41,000 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 46 treesize of output 35 [2023-11-25 00:05:41,022 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-25 00:05:41,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-25 00:05:41,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-25 00:05:41,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:05:41,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-11-25 00:05:41,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:05:41,578 INFO L349 Elim1Store]: treesize reduction 44, result has 10.2 percent of original size [2023-11-25 00:05:41,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 77 [2023-11-25 00:05:41,596 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 92 treesize of output 52 [2023-11-25 00:05:41,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:05:41,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:05:41,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:05:41,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-25 00:05:41,630 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 23 treesize of output 11 [2023-11-25 00:05:41,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-11-25 00:05:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:05:41,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:05:41,909 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (= |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 0)) (.cse0 (= |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| 0))) (and (or (forall ((v_ArrVal_380 (Array Int Int)) (v_DerPreprocessor_7 (Array Int Int)) (v_ArrVal_382 (Array Int Int)) (v_DerPreprocessor_6 (Array Int Int)) (v_ArrVal_383 (Array Int Int)) (v_DerPreprocessor_8 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_7) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_383) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_6) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_380) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_8) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_382) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (not .cse0) (not .cse1)) (or (forall ((v_DerPreprocessor_3 (Array Int Int)) (v_ArrVal_380 (Array Int Int)) (v_DerPreprocessor_5 (Array Int Int)) (v_ArrVal_382 (Array Int Int)) (v_ArrVal_383 (Array Int Int)) (v_DerPreprocessor_4 Int)) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base|) (+ |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 4) v_DerPreprocessor_4)) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_383) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| v_DerPreprocessor_3) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_380) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| v_DerPreprocessor_5) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_382) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (and .cse1 .cse0)))) is different from false [2023-11-25 00:05:41,946 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_sll_insert_~last~0#1.base| 0)) (.cse1 (= |c_ULTIMATE.start_sll_insert_~last~0#1.offset| 0))) (and (or (and .cse0 .cse1) (forall ((v_DerPreprocessor_3 (Array Int Int)) (v_ArrVal_380 (Array Int Int)) (v_DerPreprocessor_5 (Array Int Int)) (v_ArrVal_382 (Array Int Int)) (v_ArrVal_383 (Array Int Int)) (v_DerPreprocessor_4 Int)) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~last~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_sll_insert_~last~0#1.base|) (+ |c_ULTIMATE.start_sll_insert_~last~0#1.offset| 4) v_DerPreprocessor_4)) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_383) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~last~0#1.base| v_DerPreprocessor_3) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_380) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~last~0#1.base| v_DerPreprocessor_5) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_382) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (not .cse0) (not .cse1) (forall ((v_ArrVal_380 (Array Int Int)) (v_DerPreprocessor_7 (Array Int Int)) (v_ArrVal_382 (Array Int Int)) (v_DerPreprocessor_6 (Array Int Int)) (v_ArrVal_383 (Array Int Int)) (v_DerPreprocessor_8 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_7) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_383) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_6) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_380) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_8) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_382) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))) is different from false [2023-11-25 00:05:41,989 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|)) (.cse3 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|))) (let ((.cse0 (= .cse3 0)) (.cse1 (= .cse2 0))) (and (or (not .cse0) (not .cse1) (forall ((v_ArrVal_380 (Array Int Int)) (v_DerPreprocessor_7 (Array Int Int)) (v_ArrVal_382 (Array Int Int)) (v_DerPreprocessor_6 (Array Int Int)) (v_ArrVal_383 (Array Int Int)) (v_DerPreprocessor_8 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_7) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_383) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_6) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_380) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_8) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_382) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (forall ((v_DerPreprocessor_3 (Array Int Int)) (v_ArrVal_380 (Array Int Int)) (v_DerPreprocessor_5 (Array Int Int)) (v_ArrVal_382 (Array Int Int)) (v_ArrVal_383 (Array Int Int)) (v_DerPreprocessor_4 Int)) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| .cse2 (store (select |c_#memory_int| .cse2) (+ .cse3 4) v_DerPreprocessor_4)) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_383) (select (select (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_3) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_380) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| .cse2 v_DerPreprocessor_5) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_382) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (and .cse0 .cse1))))) is different from false [2023-11-25 00:05:42,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211724807] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:05:42,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [297661354] [2023-11-25 00:05:42,661 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-25 00:05:42,661 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:05:42,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:05:42,661 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:05:42,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:05:44,071 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 137 for LOIs [2023-11-25 00:05:44,343 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:05:54,619 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '586#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~ptr~0#1.base|) |ULTIMATE.start_main_~ptr~0#1.offset|) 1)) (or (not (= |ULTIMATE.start_main_~ptr~0#1.base| 0)) (not (= |ULTIMATE.start_main_~ptr~0#1.offset| 0))) (= |ULTIMATE.start_main_~temp~2#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4))) (= |ULTIMATE.start_main_~count~0#1| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |ULTIMATE.start_sll_create_#res#1.offset| 0) (exists ((|v_#memory_$Pointer$.offset_106| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_insert_~head#1.base_23| Int) (|v_#memory_int_46| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_106| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29| Int) (|v_#memory_$Pointer$.offset_48| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_32| Int) (|v_#memory_int_123| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_32| Int) (|v_#memory_$Pointer$.base_48| (Array Int (Array Int Int)))) (and (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_48| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29| (store (select |v_#memory_$Pointer$.offset_48| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29|) 4 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29|) 4)))) (= |#memory_int| (store |v_#memory_int_46| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29| (store (select |v_#memory_int_46| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29|) 4 (select (select |#memory_int| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29|) 4)))) (= (store |v_#memory_$Pointer$.base_48| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29| (store (select |v_#memory_$Pointer$.base_48| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29|) 4 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29|) 4))) |#memory_$Pointer$.base|) (<= 2 |v_ULTIMATE.start_sll_insert_~head#1.base_23|) (or (and (= |v_#memory_int_46| (store |v_#memory_int_123| |v_ULTIMATE.start_sll_insert_~head#1.base_23| (store (select |v_#memory_int_123| |v_ULTIMATE.start_sll_insert_~head#1.base_23|) 0 (select (select |v_#memory_int_46| |v_ULTIMATE.start_sll_insert_~head#1.base_23|) 0)))) (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_32| 0) (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_32| 0) (= |v_#memory_$Pointer$.offset_48| (store |v_#memory_$Pointer$.offset_106| |v_ULTIMATE.start_sll_insert_~head#1.base_23| (store (select |v_#memory_$Pointer$.offset_106| |v_ULTIMATE.start_sll_insert_~head#1.base_23|) 0 0))) (= (store |v_#memory_$Pointer$.base_106| |v_ULTIMATE.start_sll_insert_~head#1.base_23| (store (select |v_#memory_$Pointer$.base_106| |v_ULTIMATE.start_sll_insert_~head#1.base_23|) 0 |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29|)) |v_#memory_$Pointer$.base_48|)) (and (= (store |v_#memory_int_123| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_32| (store (select |v_#memory_int_123| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_32|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_32| 4) (select (select |v_#memory_int_46| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_32|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_32| 4)))) |v_#memory_int_46|) (= (store |v_#memory_$Pointer$.base_106| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_32| (store (select |v_#memory_$Pointer$.base_106| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_32|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_32| 4) |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29|)) |v_#memory_$Pointer$.base_48|) (or (not (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_32| 0)) (not (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_32| 0))) (= (store |v_#memory_$Pointer$.offset_106| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_32| (store (select |v_#memory_$Pointer$.offset_106| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_32|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_32| 4) 0)) |v_#memory_$Pointer$.offset_48|))))) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) |ULTIMATE.start_main_~temp~2#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_main_~ptr~0#1.base|) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2023-11-25 00:05:54,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:05:54,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:05:54,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2023-11-25 00:05:54,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288342446] [2023-11-25 00:05:54,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:05:54,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-25 00:05:54,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:54,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-25 00:05:54,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1776, Unknown=5, NotChecked=258, Total=2162 [2023-11-25 00:05:54,624 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 31 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-25 00:05:56,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:56,600 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2023-11-25 00:05:56,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-25 00:05:56,602 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 24 [2023-11-25 00:05:56,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:56,603 INFO L225 Difference]: With dead ends: 26 [2023-11-25 00:05:56,604 INFO L226 Difference]: Without dead ends: 23 [2023-11-25 00:05:56,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=198, Invalid=2669, Unknown=7, NotChecked=318, Total=3192 [2023-11-25 00:05:56,607 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:56,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 123 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-25 00:05:56,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-25 00:05:56,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-25 00:05:56,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2023-11-25 00:05:56,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-11-25 00:05:56,622 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 24 [2023-11-25 00:05:56,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:56,623 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-11-25 00:05:56,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-25 00:05:56,623 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-11-25 00:05:56,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-25 00:05:56,624 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:56,624 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:56,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-25 00:05:56,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:56,837 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:56,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:56,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1690262548, now seen corresponding path program 3 times [2023-11-25 00:05:56,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:56,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867586784] [2023-11-25 00:05:56,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:56,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-25 00:05:57,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:57,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867586784] [2023-11-25 00:05:57,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867586784] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:05:57,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440622584] [2023-11-25 00:05:57,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-25 00:05:57,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:57,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:05:57,116 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:05:57,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:05:57,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-25 00:05:57,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:05:57,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-25 00:05:57,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:05:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-25 00:05:58,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:05:58,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-25 00:05:58,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440622584] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-25 00:05:58,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:05:58,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 7] total 11 [2023-11-25 00:05:58,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542445153] [2023-11-25 00:05:58,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:58,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:05:58,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:58,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:05:58,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-25 00:05:58,151 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2023-11-25 00:05:58,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:58,248 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2023-11-25 00:05:58,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:05:58,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) Word has length 25 [2023-11-25 00:05:58,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:58,250 INFO L225 Difference]: With dead ends: 28 [2023-11-25 00:05:58,250 INFO L226 Difference]: Without dead ends: 22 [2023-11-25 00:05:58,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-11-25 00:05:58,251 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:58,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 24 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:05:58,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-25 00:05:58,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-25 00:05:58,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2023-11-25 00:05:58,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-25 00:05:58,270 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 25 [2023-11-25 00:05:58,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:58,271 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-25 00:05:58,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2023-11-25 00:05:58,271 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-25 00:05:58,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-25 00:05:58,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:58,273 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:58,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-25 00:05:58,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:58,482 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:58,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:58,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1089623622, now seen corresponding path program 1 times [2023-11-25 00:05:58,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:58,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338172686] [2023-11-25 00:05:58,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:58,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:06:01,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:01,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338172686] [2023-11-25 00:06:01,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338172686] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:06:01,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372962355] [2023-11-25 00:06:01,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:01,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:01,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:01,318 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:01,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87f798a5-2a48-438a-9f40-d8f31dfce26a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:06:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:01,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 119 conjunts are in the unsatisfiable core [2023-11-25 00:06:01,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:01,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-25 00:06:02,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-25 00:06:02,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2023-11-25 00:06:02,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:06:02,371 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-25 00:06:02,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-25 00:06:02,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-25 00:06:02,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:06:02,543 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 46 treesize of output 35 [2023-11-25 00:06:02,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:06:02,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:06:02,574 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-11-25 00:06:02,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 33 [2023-11-25 00:06:02,616 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-25 00:06:02,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15