./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f2f6ef7968fa573a7da88ae0a516f1d800f437d82b0fa75227e8d7d318952eb1 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 11:21:33,539 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:21:33,606 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 11:21:33,611 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:21:33,612 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:21:33,641 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:21:33,641 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:21:33,642 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:21:33,644 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:21:33,647 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:21:33,647 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:21:33,648 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:21:33,648 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:21:33,648 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 11:21:33,649 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:21:33,651 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:21:33,651 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 11:21:33,652 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 11:21:33,652 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:21:33,653 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 11:21:33,656 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 11:21:33,657 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 11:21:33,657 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:21:33,658 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 11:21:33,658 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 11:21:33,658 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 11:21:33,658 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 11:21:33,659 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:21:33,659 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 11:21:33,659 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:21:33,659 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 11:21:33,660 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:21:33,660 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 11:21:33,660 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 11:21:33,661 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:21:33,661 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:21:33,662 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:21:33,662 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:21:33,662 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:21:33,663 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:21:33,663 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:21:33,664 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 11:21:33,664 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 11:21:33,664 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 11:21:33,664 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:21:33,665 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:21:33,665 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:21:33,665 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_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f2f6ef7968fa573a7da88ae0a516f1d800f437d82b0fa75227e8d7d318952eb1 [2024-11-02 11:21:33,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:21:33,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:21:33,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:21:33,977 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:21:33,978 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:21:33,979 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i Unable to find full path for "g++" [2024-11-02 11:21:36,421 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:21:36,781 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:21:36,782 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i [2024-11-02 11:21:36,795 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/data/83e0d31f8/7d25a2441d9f4f9eb0b9567372af1db9/FLAGd58f6b211 [2024-11-02 11:21:36,815 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/data/83e0d31f8/7d25a2441d9f4f9eb0b9567372af1db9 [2024-11-02 11:21:36,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:21:36,819 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:21:36,821 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:21:36,821 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:21:36,826 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:21:36,827 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:21:36" (1/1) ... [2024-11-02 11:21:36,829 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@643e5dee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:36, skipping insertion in model container [2024-11-02 11:21:36,829 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:21:36" (1/1) ... [2024-11-02 11:21:36,882 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:21:37,285 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i[24547,24560] [2024-11-02 11:21:37,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:21:37,301 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:21:37,375 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i[24547,24560] [2024-11-02 11:21:37,376 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:21:37,414 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:21:37,415 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:37 WrapperNode [2024-11-02 11:21:37,415 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:21:37,416 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:21:37,417 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:21:37,417 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:21:37,426 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:37" (1/1) ... [2024-11-02 11:21:37,447 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:37" (1/1) ... [2024-11-02 11:21:37,484 INFO L138 Inliner]: procedures = 127, calls = 45, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 149 [2024-11-02 11:21:37,484 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:21:37,485 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:21:37,486 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:21:37,486 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:21:37,497 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:37" (1/1) ... [2024-11-02 11:21:37,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:37" (1/1) ... [2024-11-02 11:21:37,506 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:37" (1/1) ... [2024-11-02 11:21:37,507 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:37" (1/1) ... [2024-11-02 11:21:37,515 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:37" (1/1) ... [2024-11-02 11:21:37,519 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:37" (1/1) ... [2024-11-02 11:21:37,521 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:37" (1/1) ... [2024-11-02 11:21:37,522 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:37" (1/1) ... [2024-11-02 11:21:37,526 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:21:37,527 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:21:37,527 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:21:37,527 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:21:37,528 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:37" (1/1) ... [2024-11-02 11:21:37,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:21:37,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:21:37,572 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:21:37,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:21:37,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 11:21:37,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 11:21:37,607 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-02 11:21:37,607 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-02 11:21:37,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 11:21:37,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 11:21:37,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 11:21:37,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-02 11:21:37,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-02 11:21:37,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 11:21:37,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-02 11:21:37,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 11:21:37,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:21:37,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:21:37,758 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:21:37,760 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:21:38,125 INFO L? ?]: Removed 49 outVars from TransFormulas that were not future-live. [2024-11-02 11:21:38,126 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:21:38,186 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:21:38,186 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-02 11:21:38,187 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:21:38 BoogieIcfgContainer [2024-11-02 11:21:38,187 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:21:38,190 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:21:38,190 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:21:38,193 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:21:38,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:21:36" (1/3) ... [2024-11-02 11:21:38,194 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@344c789c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:21:38, skipping insertion in model container [2024-11-02 11:21:38,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:37" (2/3) ... [2024-11-02 11:21:38,195 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@344c789c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:21:38, skipping insertion in model container [2024-11-02 11:21:38,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:21:38" (3/3) ... [2024-11-02 11:21:38,196 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_prepend_unequal.i [2024-11-02 11:21:38,215 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:21:38,215 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 11:21:38,278 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:21:38,285 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4515b668, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:21:38,285 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 11:21:38,289 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 11:21:38,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-02 11:21:38,299 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:38,301 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:38,302 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:38,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:38,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1044137332, now seen corresponding path program 1 times [2024-11-02 11:21:38,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:38,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671794443] [2024-11-02 11:21:38,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:38,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:38,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 11:21:38,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:38,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671794443] [2024-11-02 11:21:38,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671794443] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:38,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:38,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:21:38,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926341829] [2024-11-02 11:21:38,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:38,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:38,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:38,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:38,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:38,870 INFO L87 Difference]: Start difference. First operand has 29 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 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) [2024-11-02 11:21:38,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:38,924 INFO L93 Difference]: Finished difference Result 55 states and 80 transitions. [2024-11-02 11:21:38,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:38,928 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 [2024-11-02 11:21:38,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:38,936 INFO L225 Difference]: With dead ends: 55 [2024-11-02 11:21:38,936 INFO L226 Difference]: Without dead ends: 26 [2024-11-02 11:21:38,940 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:38,948 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:38,949 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 60 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 11:21:38,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-02 11:21:38,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2024-11-02 11:21:38,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 11:21:38,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2024-11-02 11:21:38,995 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 16 [2024-11-02 11:21:38,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:38,996 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2024-11-02 11:21:38,996 INFO L472 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) [2024-11-02 11:21:38,996 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2024-11-02 11:21:38,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-02 11:21:38,998 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:38,998 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:38,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 11:21:38,999 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:38,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:38,999 INFO L85 PathProgramCache]: Analyzing trace with hash 347668139, now seen corresponding path program 1 times [2024-11-02 11:21:39,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:39,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535812241] [2024-11-02 11:21:39,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:39,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 11:21:39,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:39,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535812241] [2024-11-02 11:21:39,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535812241] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:21:39,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964065317] [2024-11-02 11:21:39,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:39,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:21:39,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:21:39,766 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:21:39,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 11:21:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:39,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-02 11:21:39,980 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:21:40,162 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 13 treesize of output 9 [2024-11-02 11:21:40,365 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2024-11-02 11:21:40,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:21:40,383 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 51 treesize of output 42 [2024-11-02 11:21:40,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:21:40,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:21:40,397 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 40 treesize of output 37 [2024-11-02 11:21:40,406 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 0 case distinctions, treesize of input 32 treesize of output 17 [2024-11-02 11:21:40,414 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2024-11-02 11:21:40,438 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-02 11:21:40,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2024-11-02 11:21:40,492 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 44 treesize of output 32 [2024-11-02 11:21:40,498 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 27 treesize of output 19 [2024-11-02 11:21:40,502 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 19 treesize of output 7 [2024-11-02 11:21:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 11:21:40,529 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 11:21:40,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964065317] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:40,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 11:21:40,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 20 [2024-11-02 11:21:40,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712438306] [2024-11-02 11:21:40,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:40,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-02 11:21:40,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:40,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-02 11:21:40,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2024-11-02 11:21:40,534 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 11:21:40,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:40,889 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2024-11-02 11:21:40,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-02 11:21:40,890 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-11-02 11:21:40,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:40,891 INFO L225 Difference]: With dead ends: 28 [2024-11-02 11:21:40,891 INFO L226 Difference]: Without dead ends: 26 [2024-11-02 11:21:40,892 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2024-11-02 11:21:40,893 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:40,894 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 98 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:21:40,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-02 11:21:40,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-02 11:21:40,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 11:21:40,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2024-11-02 11:21:40,902 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 22 [2024-11-02 11:21:40,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:40,902 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2024-11-02 11:21:40,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 11:21:40,903 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2024-11-02 11:21:40,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-02 11:21:40,904 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:40,904 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:40,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 11:21:41,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:21:41,109 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:41,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:41,109 INFO L85 PathProgramCache]: Analyzing trace with hash -898346458, now seen corresponding path program 1 times [2024-11-02 11:21:41,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:41,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033540489] [2024-11-02 11:21:41,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:41,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:41,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 11:21:41,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:41,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033540489] [2024-11-02 11:21:41,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033540489] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:21:41,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756884513] [2024-11-02 11:21:41,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:41,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:21:41,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:21:41,629 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:21:41,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 11:21:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:41,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-02 11:21:41,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:21:41,936 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 8 treesize of output 4 [2024-11-02 11:21:41,964 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_node_create_~temp~0#1.base_15| Int)) (and (<= (+ |v_node_create_~temp~0#1.base_15| 1) |c_#StackHeapBarrier|) (= (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_15| (select |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_15|)) |c_#memory_$Pointer$.base|))) is different from true [2024-11-02 11:21:41,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:21:41,980 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 17 treesize of output 12 [2024-11-02 11:21:41,990 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 16 treesize of output 8 [2024-11-02 11:21:41,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2024-11-02 11:21:41,994 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:21:42,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756884513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:21:42,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [821155264] [2024-11-02 11:21:42,126 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-02 11:21:42,127 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:21:42,132 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:21:42,137 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:21:42,138 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:21:44,232 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 8 for LOIs [2024-11-02 11:21:44,245 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 11:22:05,785 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '414#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~count~0#1| 1) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0)) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0)) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |ULTIMATE.start_main_~ptr~0#1.base| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0)) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0))) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (exists ((|v_#memory_$Pointer$.base_64| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_61| (Array Int (Array Int Int))) (|v_#memory_int_85| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13| Int) (|v_#memory_int_28| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_prepend_~head#1.base_15| Int)) (and (= (store |v_#memory_int_85| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_15| (store (select |v_#memory_int_85| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_15|) 0 (select (select |v_#memory_int_28| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_15|) 0))) |v_#memory_int_28|) (= |#memory_int| (store |v_#memory_int_28| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13| (store (select |v_#memory_int_28| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13|) 0 (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13|) 0)))) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_61| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_15| (store (select |v_#memory_$Pointer$.offset_61| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_15|) 0 0)) |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13| (store (select (store |v_#memory_$Pointer$.offset_61| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_15| (store (select |v_#memory_$Pointer$.offset_61| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_15|) 0 0)) |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13|) 0 0))) (or (and (not (= |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13| 0)) (= |ULTIMATE.start_main_~#s~0#1.base| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_15|) (exists ((|v_#valid_33| (Array Int Int))) (and (= (store |v_#valid_33| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13| 1) |#valid|) (= (select |v_#valid_33| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13|) 0))) (exists ((|v_#memory_$Pointer$.offset_57| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.offset_57| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13| (store (store (select |v_#memory_$Pointer$.offset_57| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13|) 0 0) 4 (select (select |v_#memory_$Pointer$.offset_61| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13|) 4))) |v_#memory_$Pointer$.offset_61|)) (exists ((|v_#length_21| (Array Int Int))) (= |#length| (store |v_#length_21| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13| 8))) (exists ((|v_#memory_int_84| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_63| (Array Int (Array Int Int))) (|v_#memory_int_BEFORE_CALL_19| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_15| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| Int) (|v_#memory_$Pointer$.offset_60| (Array Int (Array Int Int)))) (and (= (select (select (store |v_#memory_$Pointer$.offset_60| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_$Pointer$.offset_60| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 0)) |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= (store |v_#memory_int_84| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_int_84| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 (select (select |v_#memory_int_BEFORE_CALL_19| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0))) |v_#memory_int_BEFORE_CALL_19|) (= |v_old(#memory_$Pointer$.base)_AFTER_CALL_15| (store |v_#memory_$Pointer$.base_63| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_$Pointer$.base_63| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_15| |ULTIMATE.start_main_~#s~0#1.base|) 0)))))) (<= (+ |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_60| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_60| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13| (store (store (select |v_#memory_$Pointer$.base_60| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13|) 0 0) 4 (select (select |v_#memory_$Pointer$.base_64| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13|) 4))) |v_#memory_$Pointer$.base_64|)) (exists ((|v_#memory_int_46| (Array Int (Array Int Int))) (|v_#memory_int_81| (Array Int (Array Int Int)))) (and (= |v_#memory_int_85| (store |v_#memory_int_46| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13| (store (select |v_#memory_int_46| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13|) 4 5))) (= |v_#memory_int_46| (store |v_#memory_int_81| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13| (store (select |v_#memory_int_81| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13|) 0 (select (select |v_#memory_int_46| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13|) 0))))))) (and (not (= |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13| 0)) (= |ULTIMATE.start_main_~#s~0#1.base| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_15|) (exists ((|v_#valid_33| (Array Int Int))) (and (= (store |v_#valid_33| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13| 1) |#valid|) (= (select |v_#valid_33| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13|) 0))) (exists ((|v_#memory_$Pointer$.offset_57| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.offset_57| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13| (store (store (select |v_#memory_$Pointer$.offset_57| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13|) 0 0) 4 (select (select |v_#memory_$Pointer$.offset_61| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13|) 4))) |v_#memory_$Pointer$.offset_61|)) (exists ((|v_#length_21| (Array Int Int))) (= |#length| (store |v_#length_21| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13| 8))) (<= (+ |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_60| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_60| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13| (store (store (select |v_#memory_$Pointer$.base_60| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13|) 0 0) 4 (select (select |v_#memory_$Pointer$.base_64| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13|) 4))) |v_#memory_$Pointer$.base_64|)) (exists ((|v_#memory_int_84| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_63| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_16| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| Int) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_16| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_60| (Array Int (Array Int Int)))) (and (= (select (select (store |v_#memory_$Pointer$.offset_60| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_$Pointer$.offset_60| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 0)) |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= |v_old(#memory_int)_AFTER_CALL_16| (store |v_#memory_int_84| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_int_84| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 (select (select |v_old(#memory_int)_AFTER_CALL_16| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0)))) (= (store |v_#memory_$Pointer$.base_63| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_$Pointer$.base_63| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_16| |ULTIMATE.start_main_~#s~0#1.base|) 0))) |v_old(#memory_$Pointer$.base)_AFTER_CALL_16|))) (exists ((|v_#memory_int_46| (Array Int (Array Int Int))) (|v_#memory_int_81| (Array Int (Array Int Int)))) (and (= |v_#memory_int_85| (store |v_#memory_int_46| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13| (store (select |v_#memory_int_46| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13|) 4 5))) (= |v_#memory_int_46| (store |v_#memory_int_81| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13| (store (select |v_#memory_int_81| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13|) 0 (select (select |v_#memory_int_46| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13|) 0)))))))) (= |#memory_$Pointer$.base| (store (store |v_#memory_$Pointer$.base_64| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_15| (store (select |v_#memory_$Pointer$.base_64| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_15|) 0 |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13|)) |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13| (store (select (store |v_#memory_$Pointer$.base_64| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_15| (store (select |v_#memory_$Pointer$.base_64| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_15|) 0 |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13|)) |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13|) 0 |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_13|))) (= (select (select |v_#memory_$Pointer$.base_64| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_15|) 0) 0) (= (select (select |v_#memory_$Pointer$.offset_61| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_15|) 0) 0))) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2024-11-02 11:22:05,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 11:22:05,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 11:22:05,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2024-11-02 11:22:05,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011047641] [2024-11-02 11:22:05,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 11:22:05,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-02 11:22:05,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:22:05,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-02 11:22:05,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=845, Unknown=7, NotChecked=58, Total=992 [2024-11-02 11:22:05,790 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 15 states, 10 states have (on average 2.0) internal successors, (20), 12 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-02 11:22:06,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:22:06,289 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2024-11-02 11:22:06,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-02 11:22:06,290 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 2.0) internal successors, (20), 12 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2024-11-02 11:22:06,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:22:06,291 INFO L225 Difference]: With dead ends: 34 [2024-11-02 11:22:06,291 INFO L226 Difference]: Without dead ends: 26 [2024-11-02 11:22:06,292 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=105, Invalid=1082, Unknown=7, NotChecked=66, Total=1260 [2024-11-02 11:22:06,293 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:22:06,293 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 125 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 156 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2024-11-02 11:22:06,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-02 11:22:06,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2024-11-02 11:22:06,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 11:22:06,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-11-02 11:22:06,299 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 24 [2024-11-02 11:22:06,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:22:06,299 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-11-02 11:22:06,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 2.0) internal successors, (20), 12 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-02 11:22:06,300 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2024-11-02 11:22:06,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-02 11:22:06,300 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:22:06,300 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:22:06,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-02 11:22:06,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:22:06,501 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:22:06,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:22:06,502 INFO L85 PathProgramCache]: Analyzing trace with hash -631196120, now seen corresponding path program 1 times [2024-11-02 11:22:06,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:22:06,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763695864] [2024-11-02 11:22:06,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:06,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:22:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:22:08,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:22:08,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763695864] [2024-11-02 11:22:08,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763695864] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:22:08,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840437018] [2024-11-02 11:22:08,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:08,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:22:08,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:22:08,173 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:22:08,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a54a166-3d11-42b5-a4ac-df9cf7b8cc0e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 11:22:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:08,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-02 11:22:08,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:22:08,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-02 11:22:08,581 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-02 11:22:08,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-02 11:22:08,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-02 11:22:08,854 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2024-11-02 11:22:08,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 41 [2024-11-02 11:22:08,982 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-11-02 11:22:08,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2024-11-02 11:22:08,990 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 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-02 11:22:08,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-02 11:22:09,032 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_node_create_~temp~0#1.base_26| Int)) (and (<= (+ |v_node_create_~temp~0#1.base_26| 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |v_node_create_~temp~0#1.base_26| (select |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_26|))) (= (select |c_old(#valid)| |v_node_create_~temp~0#1.base_26|) 0) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_26| (select |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_26|))))) is different from true [2024-11-02 11:22:09,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:22:09,069 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2024-11-02 11:22:09,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 38 [2024-11-02 11:22:09,111 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-02 11:22:09,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2024-11-02 11:22:09,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:22:09,124 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 16 treesize of output 11 [2024-11-02 11:22:09,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-02 11:22:09,224 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-11-02 11:22:09,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-11-02 11:22:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-02 11:22:09,230 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:22:09,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840437018] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:22:09,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2114897407] [2024-11-02 11:22:09,484 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-02 11:22:09,484 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:22:09,485 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:22:09,485 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:22:09,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:22:10,903 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 8 for LOIs [2024-11-02 11:22:10,919 INFO L180 IcfgInterpreter]: Interpretation finished