./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2c_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_c57df4b8-7697-4217-bd80-07ff619b6ee1/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57df4b8-7697-4217-bd80-07ff619b6ee1/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_c57df4b8-7697-4217-bd80-07ff619b6ee1/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57df4b8-7697-4217-bd80-07ff619b6ee1/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2c_insert_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57df4b8-7697-4217-bd80-07ff619b6ee1/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_c57df4b8-7697-4217-bd80-07ff619b6ee1/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 8eaca07dd267d84d5b5f55ad6096951e873362e33b975be77e0f552bdb4e3bcb --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:01:14,366 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:01:14,491 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57df4b8-7697-4217-bd80-07ff619b6ee1/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:01:14,496 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:01:14,498 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:01:14,538 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:01:14,538 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:01:14,540 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:01:14,541 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:01:14,546 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:01:14,547 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:01:14,547 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:01:14,548 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:01:14,550 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:01:14,551 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:01:14,551 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:01:14,552 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:01:14,552 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:01:14,553 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:01:14,554 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:01:14,554 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:01:14,555 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:01:14,556 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:01:14,557 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:01:14,557 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:01:14,558 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:01:14,558 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:01:14,559 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:01:14,559 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:01:14,560 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:01:14,561 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:01:14,562 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:01:14,562 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:01:14,562 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:01:14,563 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:01:14,563 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:01:14,564 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:01:14,565 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:01:14,565 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:01:14,565 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:01:14,566 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:01:14,566 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:01:14,567 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:01:14,567 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:01:14,568 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:01:14,568 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:01:14,568 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:01:14,569 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_c57df4b8-7697-4217-bd80-07ff619b6ee1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57df4b8-7697-4217-bd80-07ff619b6ee1/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8eaca07dd267d84d5b5f55ad6096951e873362e33b975be77e0f552bdb4e3bcb [2023-11-25 00:01:14,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:01:14,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:01:14,865 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:01:14,867 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:01:14,868 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:01:14,869 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57df4b8-7697-4217-bd80-07ff619b6ee1/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/list-simple/sll2c_insert_equal.i [2023-11-25 00:01:18,121 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:01:18,367 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:01:18,375 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57df4b8-7697-4217-bd80-07ff619b6ee1/sv-benchmarks/c/list-simple/sll2c_insert_equal.i [2023-11-25 00:01:18,393 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57df4b8-7697-4217-bd80-07ff619b6ee1/bin/utaipan-verify-SwPr7d2a91/data/464551f6e/179d7ac2bc744c6db2bbd89ad5eecb66/FLAG8613dae66 [2023-11-25 00:01:18,406 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57df4b8-7697-4217-bd80-07ff619b6ee1/bin/utaipan-verify-SwPr7d2a91/data/464551f6e/179d7ac2bc744c6db2bbd89ad5eecb66 [2023-11-25 00:01:18,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:01:18,409 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:01:18,411 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:01:18,411 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:01:18,417 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:01:18,417 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:01:18" (1/1) ... [2023-11-25 00:01:18,418 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5de668c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:18, skipping insertion in model container [2023-11-25 00:01:18,419 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:01:18" (1/1) ... [2023-11-25 00:01:18,468 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:01:18,832 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_c57df4b8-7697-4217-bd80-07ff619b6ee1/sv-benchmarks/c/list-simple/sll2c_insert_equal.i[24601,24614] [2023-11-25 00:01:18,841 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:01:18,854 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:01:18,931 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_c57df4b8-7697-4217-bd80-07ff619b6ee1/sv-benchmarks/c/list-simple/sll2c_insert_equal.i[24601,24614] [2023-11-25 00:01:18,936 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:01:18,975 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:01:18,975 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:18 WrapperNode [2023-11-25 00:01:18,975 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:01:18,977 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:01:18,977 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:01:18,977 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:01:18,985 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:18" (1/1) ... [2023-11-25 00:01:19,018 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:18" (1/1) ... [2023-11-25 00:01:19,065 INFO L138 Inliner]: procedures = 127, calls = 43, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 143 [2023-11-25 00:01:19,066 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:01:19,067 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:01:19,067 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:01:19,067 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:01:19,082 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:18" (1/1) ... [2023-11-25 00:01:19,083 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:18" (1/1) ... [2023-11-25 00:01:19,086 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:18" (1/1) ... [2023-11-25 00:01:19,087 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:18" (1/1) ... [2023-11-25 00:01:19,096 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:18" (1/1) ... [2023-11-25 00:01:19,106 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:18" (1/1) ... [2023-11-25 00:01:19,108 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:18" (1/1) ... [2023-11-25 00:01:19,110 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:18" (1/1) ... [2023-11-25 00:01:19,114 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:01:19,115 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:01:19,115 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:01:19,116 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:01:19,117 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:18" (1/1) ... [2023-11-25 00:01:19,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:01:19,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57df4b8-7697-4217-bd80-07ff619b6ee1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:19,152 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57df4b8-7697-4217-bd80-07ff619b6ee1/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:01:19,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57df4b8-7697-4217-bd80-07ff619b6ee1/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:01:19,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:01:19,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:01:19,184 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-25 00:01:19,185 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-25 00:01:19,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-25 00:01:19,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:01:19,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-25 00:01:19,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-25 00:01:19,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-25 00:01:19,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:01:19,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-25 00:01:19,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:01:19,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:01:19,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:01:19,335 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:01:19,340 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:01:19,616 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:01:19,735 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:01:19,735 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-25 00:01:19,737 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:01:19 BoogieIcfgContainer [2023-11-25 00:01:19,737 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:01:19,741 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:01:19,741 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:01:19,744 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:01:19,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:01:18" (1/3) ... [2023-11-25 00:01:19,745 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3d3895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:01:19, skipping insertion in model container [2023-11-25 00:01:19,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:18" (2/3) ... [2023-11-25 00:01:19,746 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3d3895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:01:19, skipping insertion in model container [2023-11-25 00:01:19,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:01:19" (3/3) ... [2023-11-25 00:01:19,748 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_insert_equal.i [2023-11-25 00:01:19,769 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:01:19,769 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:01:19,819 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:01:19,826 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;@31289c81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:01:19,826 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:01:19,834 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 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 00:01:19,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-25 00:01:19,845 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:19,846 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:01:19,846 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:19,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:19,861 INFO L85 PathProgramCache]: Analyzing trace with hash -328306301, now seen corresponding path program 1 times [2023-11-25 00:01:19,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:19,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537936154] [2023-11-25 00:01:19,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:19,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:01:20,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:20,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537936154] [2023-11-25 00:01:20,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537936154] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:20,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:01:20,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:01:20,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679705839] [2023-11-25 00:01:20,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:20,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:01:20,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:20,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:01:20,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:01:20,550 INFO L87 Difference]: Start difference. First operand has 24 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 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) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 00:01:20,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:20,723 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2023-11-25 00:01:20,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:01:20,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 16 [2023-11-25 00:01:20,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:20,733 INFO L225 Difference]: With dead ends: 45 [2023-11-25 00:01:20,733 INFO L226 Difference]: Without dead ends: 21 [2023-11-25 00:01:20,736 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 00:01:20,741 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:20,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 42 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:01:20,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-25 00:01:20,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2023-11-25 00:01:20,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:01:20,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-11-25 00:01:20,794 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 16 [2023-11-25 00:01:20,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:20,794 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-11-25 00:01:20,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 00:01:20,795 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-11-25 00:01:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-25 00:01:20,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:20,799 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:01:20,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:01:20,801 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:20,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:20,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1024789413, now seen corresponding path program 1 times [2023-11-25 00:01:20,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:20,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811949028] [2023-11-25 00:01:20,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:20,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-25 00:01:21,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:21,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811949028] [2023-11-25 00:01:21,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811949028] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:21,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:01:21,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:01:21,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550524203] [2023-11-25 00:01:21,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:21,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:01:21,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:21,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:01:21,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:01:21,232 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-25 00:01:21,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:21,417 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2023-11-25 00:01:21,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:01:21,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2023-11-25 00:01:21,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:21,418 INFO L225 Difference]: With dead ends: 26 [2023-11-25 00:01:21,419 INFO L226 Difference]: Without dead ends: 20 [2023-11-25 00:01:21,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:01:21,421 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:21,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:01:21,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-25 00:01:21,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-25 00:01:21,427 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 00:01:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-11-25 00:01:21,428 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 22 [2023-11-25 00:01:21,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:21,429 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-11-25 00:01:21,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-25 00:01:21,429 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-11-25 00:01:21,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-25 00:01:21,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:21,430 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:01:21,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:01:21,431 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:21,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:21,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1792809609, now seen corresponding path program 1 times [2023-11-25 00:01:21,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:21,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58423863] [2023-11-25 00:01:21,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:21,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:01:25,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:25,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58423863] [2023-11-25 00:01:25,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58423863] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:01:25,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961855002] [2023-11-25 00:01:25,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:25,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:25,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57df4b8-7697-4217-bd80-07ff619b6ee1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:25,152 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57df4b8-7697-4217-bd80-07ff619b6ee1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:25,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57df4b8-7697-4217-bd80-07ff619b6ee1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:01:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:25,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 115 conjunts are in the unsatisfiable core [2023-11-25 00:01:25,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:25,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-25 00:01:25,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-25 00:01:25,798 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-25 00:01:25,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-25 00:01:25,997 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-25 00:01:25,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2023-11-25 00:01:26,092 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 00:01:26,239 INFO L349 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2023-11-25 00:01:26,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2023-11-25 00:01:26,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 00:01:26,581 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 20 treesize of output 15 [2023-11-25 00:01:26,810 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 45 treesize of output 25 [2023-11-25 00:01:26,821 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 00:01:26,835 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-25 00:01:26,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 10 [2023-11-25 00:01:27,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:01:27,090 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 53 treesize of output 40 [2023-11-25 00:01:27,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:01:27,119 INFO L349 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2023-11-25 00:01:27,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 25 [2023-11-25 00:01:27,131 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 20 treesize of output 15 [2023-11-25 00:01:27,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:01:27,151 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 00:01:27,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:01:27,732 INFO L349 Elim1Store]: treesize reduction 44, result has 10.2 percent of original size [2023-11-25 00:01:27,733 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 102 treesize of output 75 [2023-11-25 00:01:27,742 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 88 treesize of output 52 [2023-11-25 00:01:27,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2023-11-25 00:01:27,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:01:27,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:01:27,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:01:27,781 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 15 treesize of output 7 [2023-11-25 00:01:27,789 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 00:01:27,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:01:27,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:01:34,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961855002] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:01:34,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1867302714] [2023-11-25 00:01:34,740 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-25 00:01:34,740 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:01:34,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:01:34,750 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:01:34,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:01:36,257 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2023-11-25 00:01:36,267 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:01:46,583 WARN L293 SmtUtils]: Spent 6.31s on a formula simplification that was a NOOP. DAG size: 171 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-25 00:02:12,966 WARN L293 SmtUtils]: Spent 5.39s on a formula simplification that was a NOOP. DAG size: 171 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-25 00:02:12,969 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '318#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (exists ((|v_ULTIMATE.start_sll_circular_insert_#t~mem13#1.base_22| Int) (|v_ULTIMATE.start_sll_circular_insert_#t~mem14#1.base_35| Int) (|v_#memory_int_137| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_27| Int) (|v_ULTIMATE.start_sll_circular_insert_#t~mem15#1.base_21| Int) (|v_#memory_$Pointer$.base_68| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_68| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_insert_#t~mem13#1.offset_36| Int) (|v_ULTIMATE.start_sll_circular_insert_#t~mem15#1.offset_35| Int) (|v_ULTIMATE.start_sll_circular_insert_#t~mem14#1.offset_35| Int) (|v_ULTIMATE.start_sll_circular_insert_#t~mem13#1.base_36| Int) (|v_ULTIMATE.start_sll_circular_insert_#t~mem14#1.base_21| Int) (|v_ULTIMATE.start_sll_circular_insert_~last~1#1.offset_23| Int) (|v_#memory_$Pointer$.base_94| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_insert_#t~mem15#1.base_35| Int) (|v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26| Int) (|v_ULTIMATE.start_sll_circular_insert_~head#1.base_25| Int) (|v_#memory_$Pointer$.offset_94| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_insert_~last~1#1.base_23| Int) (|v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.offset_27| Int) (|v_ULTIMATE.start_sll_circular_insert_#t~mem15#1.offset_21| Int) (|v_ULTIMATE.start_sll_circular_insert_#t~mem14#1.offset_21| Int) (|v_#memory_int_81| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_insert_#t~mem13#1.offset_22| Int) (|v_#memory_int_82| (Array Int (Array Int Int))) (|v_#memory_int_83| (Array Int (Array Int Int)))) (and (<= 2 |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) (or (and (= |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_27| 0) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_68| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25| (store (select |v_#memory_$Pointer$.offset_68| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0 0))) (= (store |v_#memory_$Pointer$.base_68| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25| (store (select |v_#memory_$Pointer$.base_68| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0 |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|)) |#memory_$Pointer$.base|) (or (and (= (select (select |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0) 0) (= |v_ULTIMATE.start_sll_circular_insert_#t~mem14#1.base_35| |v_ULTIMATE.start_sll_circular_insert_#t~mem14#1.base_21|) (= |v_ULTIMATE.start_sll_circular_insert_#t~mem15#1.offset_35| |v_ULTIMATE.start_sll_circular_insert_#t~mem15#1.offset_21|) (= |v_ULTIMATE.start_sll_circular_insert_#t~mem15#1.base_35| |v_ULTIMATE.start_sll_circular_insert_#t~mem15#1.base_21|) (= |v_ULTIMATE.start_sll_circular_insert_#t~mem14#1.offset_35| |v_ULTIMATE.start_sll_circular_insert_#t~mem14#1.offset_21|) (= (store |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26| (store (select |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0 0)) |v_#memory_$Pointer$.offset_68|) (= |v_#memory_int_83| (store |v_#memory_int_137| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26| (store (select |v_#memory_int_137| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0 (select (select |v_#memory_int_83| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0)))) (= (select (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0) 0) (= (store |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26| (store (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0 |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|)) |v_#memory_$Pointer$.base_68|)) (and (= (store |v_#memory_int_137| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26| (store (select |v_#memory_int_137| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0 (select (select |v_#memory_int_81| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0))) |v_#memory_int_81|) (= (store (store |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26| (store (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0 (select (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0))) (select (select (store |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26| (store (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0 (select (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0))) |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0) (store (select (store |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26| (store (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0 (select (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0))) (select (select (store |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26| (store (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0 (select (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0))) |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0)) (select (select (store |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26| (store (select |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0 (select (select |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0))) |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0) |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|)) |v_#memory_$Pointer$.base_68|) (= (store (store |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26| (store (select |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0 (select (select |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0))) (select (select (store |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26| (store (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0 (select (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0))) |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0) (store (select (store |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26| (store (select |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0 (select (select |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0))) (select (select (store |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26| (store (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0 (select (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0))) |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0)) (select (select (store |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26| (store (select |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0 (select (select |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0))) |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0) 0)) |v_#memory_$Pointer$.offset_68|) (= |v_#memory_int_83| (store |v_#memory_int_81| (select (select (store |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26| (store (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0 (select (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0))) |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0) (store (select |v_#memory_int_81| (select (select (store |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26| (store (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0 (select (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0))) |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0)) (select (select (store |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26| (store (select |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0 (select (select |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0))) |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0) (select (select |v_#memory_int_83| (select (select (store |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26| (store (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0 (select (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0))) |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0)) (select (select (store |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26| (store (select |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0 (select (select |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0))) |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0))))) (or (not (= (select (select |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0) 0)) (not (= (select (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0) 0))))) (= |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.offset_27| 0) (= |#memory_int| (store |v_#memory_int_83| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25| (store (select |v_#memory_int_83| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0 (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_25|) 0))))) (and (= |v_ULTIMATE.start_sll_circular_insert_#t~mem13#1.base_36| |v_ULTIMATE.start_sll_circular_insert_#t~mem13#1.base_22|) (= (store (store |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_27| (store (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_27|) |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.offset_27| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|)) |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26| (store (select (store |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_27| (store (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_27|) |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.offset_27| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|)) |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0 |v_ULTIMATE.start_sll_circular_insert_~last~1#1.base_23|)) |#memory_$Pointer$.base|) (= |v_ULTIMATE.start_sll_circular_insert_#t~mem14#1.base_35| |v_ULTIMATE.start_sll_circular_insert_#t~mem14#1.base_21|) (= |v_ULTIMATE.start_sll_circular_insert_#t~mem15#1.offset_35| |v_ULTIMATE.start_sll_circular_insert_#t~mem15#1.offset_21|) (= |v_ULTIMATE.start_sll_circular_insert_#t~mem13#1.offset_36| |v_ULTIMATE.start_sll_circular_insert_#t~mem13#1.offset_22|) (= |v_ULTIMATE.start_sll_circular_insert_#t~mem15#1.base_35| |v_ULTIMATE.start_sll_circular_insert_#t~mem15#1.base_21|) (= |v_ULTIMATE.start_sll_circular_insert_#t~mem14#1.offset_35| |v_ULTIMATE.start_sll_circular_insert_#t~mem14#1.offset_21|) (= |#memory_int| (store |v_#memory_int_82| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26| (store (select |v_#memory_int_82| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0 (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0)))) (or (not (= |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.offset_27| 0)) (not (= |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_27| 0))) (= |v_#memory_int_82| (store |v_#memory_int_137| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_27| (store (select |v_#memory_int_137| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_27|) |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.offset_27| (select (select |v_#memory_int_82| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_27|) |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.offset_27|)))) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_27| (store (select |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_27|) |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.offset_27| 0)) |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26| (store (select (store |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_27| (store (select |v_#memory_$Pointer$.offset_94| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_27|) |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.offset_27| 0)) |v_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base_26|) 0 |v_ULTIMATE.start_sll_circular_insert_~last~1#1.offset_23|))))))) (= |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_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) 1)) (= (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 00:02:12,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:02:12,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:02:12,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2023-11-25 00:02:12,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637247459] [2023-11-25 00:02:12,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:02:12,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-25 00:02:12,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:12,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-25 00:02:12,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2999, Unknown=34, NotChecked=0, Total=3192 [2023-11-25 00:02:12,979 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 38 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-25 00:02:16,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:16,449 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2023-11-25 00:02:16,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-25 00:02:16,449 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 23 [2023-11-25 00:02:16,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:16,451 INFO L225 Difference]: With dead ends: 35 [2023-11-25 00:02:16,451 INFO L226 Difference]: Without dead ends: 33 [2023-11-25 00:02:16,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 45.0s TimeCoverageRelationStatistics Valid=288, Invalid=4932, Unknown=36, NotChecked=0, Total=5256 [2023-11-25 00:02:16,455 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:16,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 189 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-25 00:02:16,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-25 00:02:16,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2023-11-25 00:02:16,465 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 00:02:16,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-11-25 00:02:16,466 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 23 [2023-11-25 00:02:16,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:16,467 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-11-25 00:02:16,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-25 00:02:16,467 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-11-25 00:02:16,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-25 00:02:16,468 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:16,469 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:16,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57df4b8-7697-4217-bd80-07ff619b6ee1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:02:16,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57df4b8-7697-4217-bd80-07ff619b6ee1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:16,677 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:16,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:16,678 INFO L85 PathProgramCache]: Analyzing trace with hash 168368091, now seen corresponding path program 2 times [2023-11-25 00:02:16,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:16,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663115169] [2023-11-25 00:02:16,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:16,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-25 00:02:16,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:16,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663115169] [2023-11-25 00:02:16,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663115169] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:16,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:16,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:02:16,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451298304] [2023-11-25 00:02:16,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:16,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:02:16,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:16,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:02:16,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:02:16,868 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-25 00:02:16,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:16,998 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2023-11-25 00:02:16,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:02:16,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-11-25 00:02:16,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:17,000 INFO L225 Difference]: With dead ends: 29 [2023-11-25 00:02:17,000 INFO L226 Difference]: Without dead ends: 22 [2023-11-25 00:02:17,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:02:17,001 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:17,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:02:17,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-25 00:02:17,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-25 00:02:17,012 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 00:02:17,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-25 00:02:17,014 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 24 [2023-11-25 00:02:17,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:17,014 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-25 00:02:17,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-25 00:02:17,015 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-25 00:02:17,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-25 00:02:17,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:17,017 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:17,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-25 00:02:17,020 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:17,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:17,021 INFO L85 PathProgramCache]: Analyzing trace with hash -606270385, now seen corresponding path program 1 times [2023-11-25 00:02:17,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:17,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216378673] [2023-11-25 00:02:17,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:17,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat